CN106408559A - Method for detecting resolution and terminal - Google Patents

Abstract

The present invention relates to the field of display technology, in particular to a method and terminal for detecting resolution, so as to solve the problem in the prior art that mobile devices cannot be used to detect the resolution of display devices. The invention discloses a method for detecting resolution, which is characterized in that it comprises: a terminal determines a target image obtained by photographing a preset image displayed on a display device to be tested; The image size displayed on the device; the terminal determines the resolution of the display device to be tested according to the displayed image size, the image size of the preset image at the reference resolution, and the reference resolution; where the image size is represented by the number of pixels . Since the embodiment of the present invention can use the terminal to compare the image size displayed on the display device under test according to the preset image with the image size of the preset image at the reference resolution, further combining with the reference resolution, the display device under test can be obtained. resolution.

Description

A method and terminal for detecting resolution

technical field

The present invention relates to the field of display technology, in particular to a method for detecting resolution and a terminal.

Background technique

From a technical point of view, a display with a resolution of 720P is called a high-definition display, and what we generally call high-definition generally refers to those displays that can reach the current higher resolution. With the development of high-definition or even ultra-high-definition display technology, more and more display devices have been able to achieve 4K (3840×2160 pixel resolution), 8K (7680×4320 pixel resolution) or even higher resolutions. Since the resolution level of ultra-high-definition can greatly enhance the commercial value of display products such as TVs, in recent years, it is often seen that merchants continue to launch TV products with the slogan of "high-definition display" or even "full high-definition display" on the market. However, in reality, it is difficult for ordinary consumers to verify the exact resolution of a display device, and often can only indirectly distinguish the resolution of a so-called "high-definition" display device based on the promotion of the merchant and the viewing experience of the display device.

To sum up, in the field of display technology, it is impossible to use mobile devices to detect the resolution of UHD display devices.

Contents of the invention

The invention provides a method and a terminal for detecting resolution, which are used to solve the problem in the prior art that the resolution of a display device cannot be effectively detected.

A method for detecting resolution provided by an embodiment of the present invention includes:

The terminal determines the target image obtained by shooting the preset image displayed in the display device to be tested;

The terminal recognizes the image size of the preset image displayed on the display device under test according to the target image;

The terminal determines the resolution of the display device under test according to the displayed image size, the image size of the preset image at a reference resolution, and the reference resolution;

Wherein, the image size is represented by the number of pixel units.

A terminal for detecting resolution provided by an embodiment of the present invention, the terminal includes:

A target image determination module, configured to determine a target image obtained by shooting a preset image displayed in the display device to be tested;

An image recognition module, configured to recognize the image size of the preset image displayed on the display device under test according to the target image;

A resolution determination module, configured to determine the resolution of the display device under test according to the displayed image size, the image size of the preset image at a reference resolution, and the reference resolution;

Wherein, the image size is represented by the number of pixel units.

Because the embodiment of the present invention can use the terminal to compare the image size displayed on the display device under test with the image size of the preset image at the reference resolution according to the preset image, and obtain the multiple relationship between the resolution of the image to be tested and the reference resolution , the resolution of the display device to be tested can be obtained through the relationship between the reference resolution and the multiple, so the embodiment of the present invention can accurately detect the display resolution of the display device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a flowchart of a method for detecting resolution provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pixel unit in a preset image provided by an embodiment of the present invention;

3 is a schematic diagram of a display image of a preset image provided in an embodiment of the present invention in a display device under test;

FIG. 4 is a schematic diagram of a boundary detection image provided by an embodiment of the present invention;

FIG. 5 is a diagram of specific steps of a method for detecting resolution provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a terminal for detecting resolution provided by an embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, a method for detecting resolution provided by an embodiment of the present invention includes:

Step 101: The terminal determines a target image obtained by shooting a preset image displayed in the display device to be tested;

Step 102: The terminal recognizes the image size of the preset image displayed on the display device under test according to the target image;

Step 103: The terminal determines the resolution of the display device to be tested according to the displayed image size, the image size of the preset image at the reference resolution, and the reference resolution;

Among them, the image size is represented by the number of pixel units.

An embodiment of the present invention provides a method for detecting resolution. First, the terminal determines the target image obtained by shooting the preset image displayed on the display device under test, and the terminal recognizes the preset image on the display device under test according to the target image. The size of the image displayed in the device, and the terminal further determines the resolution of the display device to be tested according to the displayed image size, the image size of the preset image at the reference resolution, and the reference resolution. The image size is determined by the pixel unit The size indicated by the quantity.

Among them, identifying the image size of the image displayed on the display device under test by the preset image includes identifying the maximum number of pixel units in the horizontal direction of the image displayed by the preset image on the display device under test, and identifying the maximum number of pixels in the horizontal direction of the image displayed by the preset image on the display device under test. The maximum number of pixel units in the vertical direction of an image displayed on a display device.

As the resolution of the display device used to display the preset image changes, the number of pixel units in the horizontal and vertical directions of the preset image displayed on the display device will change in a corresponding proportion, for example, under the condition of 1920*1080 resolution Under normal circumstances, the image size displayed by the preset image is 100*100 pixel units, and the image size displayed by the preset image at 3840*2160 resolution will become 200*200 pixel units, so if you can know the preset image The size of the image displayed under the condition of the reference resolution and the reference resolution only need to know the image size of the preset image displayed in the display device under test through detection, and then the resolution of the display device under test can be obtained through calculation.

The shape of the preset image involved in the embodiment of the present invention may be a square, a rectangle, a circle, or the like.

Figure 2 is a schematic diagram of the pixel unit structure of the preset image. Any pixel unit 201 in the preset image is composed of three sub-pixels 202. When the three sub-pixels emit light respectively, the entire pixel unit displays a color. Any sub-pixel and All other sub-pixels have connection structures 203 that do not emit light. The color information of the pixel unit 201 is represented by RGB information (Red-Green-Blue Message, red, green and blue color information), wherein R (Red, red) represents the color information of a red sub-pixel in a pixel unit, and G( Green, green) represents color information of a green sub-pixel in a pixel unit, and B (Blue, blue) represents color information of a blue sub-pixel in a pixel unit.

Optionally, the color of the edge area of the preset image is different from the color of the non-edge area;

Wherein, the edge area is an area composed of X pixels close to the edge of the preset image in each row of pixels of the preset image and Y pixels close to the edge of the preset image in each column of pixels, and X and Y are positive integers.

Since the embodiment of the present invention recognizes the image size of the preset image displayed in the display device to be tested, it needs to use the specific color of the edge of the preset image to identify the area where the preset image is located. An area composed of X pixels on the edge and Y pixels near the edge of the preset image in each column of pixels is set to a color different from that of the non-edge area, where X and Y are positive integers. For example, the area composed of 1 pixel near the edge of the preset image among the pixels of the preset image and 1 pixel near the edge of the preset image in each column of pixels is set to black to distinguish the area where the preset image is located, then black area and the area inside the black area is where the preset image is located.

Optionally, the shape of the preset image may be a square.

In the embodiment of the present invention, the terminal needs to determine the target image according to the shooting result of the preset image displayed on the display device to be tested, and the preset image can be shot with the help of the shooting function of the terminal itself, or with the help of other shooting devices other than the terminal Shooting of preset images.

Optionally, the terminal identifies the maximum number of pixel units in the vertical direction and the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test according to the target image.

Wherein, the process for the terminal to identify the maximum number of pixel units in the vertical direction and the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test is as follows:

In the first step, the terminal scans the target image, and determines the display area of the preset image in the display device to be tested according to the RGB information of the pixel units in the edge area of the preset image;

In the second step, a boundary detection method is used to identify the boundary image displayed in the display device to be tested by the preset image, wherein the boundary image refers to an image representing the boundary position where the color in the image changes;

The third step is to perform numerical analysis on the image color of the boundary image, compare the color change pixel by pixel for the analyzed image, and determine the horizontal and vertical colors of the preset image in the entire range displayed on the display device to be tested the number of changes;

The fourth step is to determine the maximum number of pixel units in the vertical and horizontal directions of the preset image displayed on the display device under test according to the number of color changes identified by the edge image.

The above process is described below according to Figure 3 and Figure 4:

Figure 3 is a schematic diagram of the preset image displayed on the display device under test, assuming that the preset image is displayed as a square image composed of 12*12 pixel units in the display device under test, where the edge area of the preset image is black , area 301 represents a pixel unit in the preset image displayed in the display device to be tested, area 302 represents a sub-pixel in the preset image displayed in the display device to be tested, and area 303 represents the preset image displayed in the display device to be tested Let the connected structures in the image not emit light. Since the display information of the pixel unit of the preset image is represented by RGB information, the black RGB information can be preset to represent the edge area displayed by the preset image, and the terminal can determine that the preset image is in the area to be tested according to the RGB information of the black pixel unit. The area displayed on the display device is an area displayed in black and a display area within the black area.

The terminal converts the display information of the preset image in the display device under test from RGB to YUV (YUV is a representation of image color in terms of brightness and chromaticity, where Y represents brightness, and U and V represent color. degrees), then the pixel luminance Y at the position of area 303 in FIG. 3 is zero, and the luminance of positions outside the area 303 in FIG. 3 is not zero. Compared with the sub-pixels emitting light in FIG. considered as a border area. The boundary area of the preset image in the display area of the display device to be tested is detected by boundary detection methods such as the Sobel detection method and the Canny detection method, and the boundary detection image as shown in Figure 4 is obtained, where the area 402 indicates the location of the boundary area , that is, the area where the connection structure in the pixel unit is located, and the area 401 represents the area where the sub-pixels of the preset image in the display device under test are located.

According to the boundary detection image shown in Figure 4, the terminal performs numerical analysis of the image color in the horizontal direction and vertical direction in units of display pixels in the target image, and determines that the horizontal direction in the boundary detection image ranges from black area to The number of changes in the white area and the number of changes from the black area to the white area in the vertical direction, take the maximum number of changes from the black area to the white area in the horizontal direction in the target image and the number of changes from the black area to the white area in the vertical direction The maximum value of the number of changes is recorded as A and B respectively, then A is the maximum number of sub-pixels contained in the display area of the display device under test for the preset image in the horizontal direction, and B is the maximum number of sub-pixels contained in the preset image in the vertical direction. The maximum number of sub-pixels included in the display area of the display device under test.

Finally, the image size of the preset image displayed on the display device under test can be determined: the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test is A/3, and the preset image is displayed on the display device under test. The maximum number of pixel units in the display vertical direction is B.

Optionally, the terminal determines the multiple relationship between the resolution of the display device to be tested and the reference resolution according to the image size of the preset image displayed on the display device to be tested and the image size of the preset image at the reference resolution;

The terminal determines the resolution of the display device under test according to the multiple relationship and the reference resolution.

Optionally, the terminal identifies the maximum number of pixel units in the vertical direction and the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test according to the target image.

Optionally, according to the maximum number of pixel units in the vertical direction of the preset image displayed on the display device under test and the maximum number of pixel units in the vertical direction of the preset image at the reference resolution, determine the multiples of ; and

The terminal determines the multiplier relationship in the horizontal direction according to the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test and the maximum number of pixel units in the horizontal direction of the preset image at the reference resolution;

The terminal determines the resolution of the display device to be tested according to the multiple relationship and the reference resolution, including:

The terminal determines the resolution in the vertical direction of the display device under test according to the multiple relationship in the vertical direction and the resolution in the vertical direction in the reference resolution; and

The terminal determines the resolution in the horizontal direction of the display device under test according to the multiple relationship in the horizontal direction and the resolution in the horizontal direction in the reference resolution.

The following describes the process of determining the resolution of the display device under test according to the size of the image displayed on the display device under test according to the recognized preset image in the embodiment of the present invention:

According to the determined target image, the terminal can identify the image size of the preset image displayed on the display device under test, that is, identify the maximum pixel in the horizontal direction and the maximum pixel in the vertical direction of the displayed image.

Since no matter what the shape of the preset image is, the number of pixel units in the horizontal direction and the vertical direction will still change in proportion when the resolution of the display device changes, so the preset image level at the resolution to be tested The multiple relationship between the maximum number of pixel units in the direction and the maximum number of pixel units in the horizontal direction of the preset image under the reference resolution is the multiple relationship between the resolution to be tested and the reference resolution in the horizontal direction, and the resolution under test The multiple relationship of the number of pixel units in the vertical direction of the preset image relative to the number of pixel units in the vertical direction of the preset image at the reference resolution is the multiple relationship of the resolution to be tested relative to the reference resolution in the vertical direction.

According to the obtained multiple relationship between the resolution to be tested and the reference resolution in the horizontal and vertical directions, combined with the resolution in the horizontal and vertical directions of the reference resolution, the horizontal and vertical resolution of the display device to be tested can be calculated. Orientation resolution.

For example, if the resolution of M ₀ (the resolution in the horizontal direction is M _a , and the resolution in the vertical direction is M _b ) is set as the reference resolution, it can be known that the resolution M of the display device to be tested is different from the reference resolution M ₀ The relationship between them is shown in formula (1):

M=G*M ₀ (1)

Among them, G is the multiple relationship between the resolution of the display device to be tested and the reference resolution, and M ₀ is the reference resolution.

Since the resolution of the display device is represented by the resolution in the horizontal and vertical directions, it is necessary to calculate the resolution of the display device to be tested in the horizontal and vertical directions. Viewed from both horizontal and vertical directions, the resolution _M1 of the display device to be tested in the horizontal direction is shown in formula (2):

M _l =G _l *M _a (2)

Among them, _{G l} is the multiple relationship between the resolution of the display device to be tested in the horizontal direction and the resolution of the reference resolution in the horizontal direction, and Ma is the resolution of the reference resolution in the horizontal direction.

The resolution _Mv of the display device under test in the vertical direction is shown in formula (3):

M _v =G _v *M _b (3)

Among them, G _v is the multiple relationship between the resolution of the display device to be tested in the vertical direction and the resolution of the reference resolution in the vertical direction, and M _b is the resolution of the reference resolution in the vertical direction .

The calculation method of G _l is expressed as formula (4):

G _l =m/k (4)

Wherein, m is the number of pixel units in the horizontal direction when the preset image is displayed on the display device under test, and k is the number of pixel units in the horizontal direction when the preset image is displayed at the standard resolution.

The calculation method of G _v is expressed as formula (5):

Gv = _n /l (5)

Wherein, n is the number of pixel units in the vertical direction when the preset image is displayed on the display device under test, and l is the number of pixel units in the vertical direction when the preset image is displayed at the standard resolution.

Combining formula (4) with formula (2) and combining formula (5) with formula (3), it can be known that the calculation formula for the resolution of the display device under test in the horizontal direction is:

M _l =(m/k)*M _a (6)

The formula for calculating the resolution of the display device under test in the vertical direction is:

M _v =(n/l)*M _b (7)

The horizontal and vertical resolutions of the display device under test can be calculated according to formulas (6) and (7).

In summary, the embodiment of the present invention can be configured according to the image size contained in the detected preset image when it is displayed on the display device to be tested, combined with the image size and basic resolution of the preset image displayed at the reference resolution , the resolution of the image to be tested can be obtained by calculation.

Optionally, the method for detecting the display resolution of the display device provided by the embodiment of the present invention may be implemented on a terminal such as a mobile phone or a tablet computer.

The specific steps of the method for detecting the resolution of the display device provided by the embodiment of the present invention are illustrated below with FIG. 5:

Step 501: The terminal determines a target image obtained by shooting a preset image displayed on the display device under test.

Step 502: According to the target image, the terminal identifies the size of the preset image displayed in the display device under test, which is represented by the number of pixel units.

Among them, identifying the size of the image displayed by the preset image in the display device under test, which is represented by the number of pixel units, includes identifying the maximum number of pixel units in the horizontal direction of the image displayed by the preset image in the display device under test, and identifying the preset image. Set the maximum number of pixel units of the image displayed in the display device under test in the vertical direction.

Step 503: The terminal determines the resolution of the display device under test according to the maximum number of pixel units in the horizontal direction of the preset image displayed on the display device under test and the maximum number of pixel units in the horizontal direction of the preset image at the standard resolution The multiple relationship with the benchmark resolution in the horizontal direction.

Step 504: The terminal determines the display device under test according to the maximum number of pixel units in the vertical direction of the preset image displayed on the display device under test and the maximum number of pixel units in the vertical direction of the preset image at the reference resolution The multiple relationship between the resolution and the reference resolution in the vertical direction.

Wherein, there is no necessary sequence relationship between step 503 and step 504. For example, step 503 may be executed first to determine the multiple relationship between the resolution of the display device to be tested and the reference resolution in the horizontal direction, or step 504 may be executed first to determine The multiple relationship between the resolution of the display device to be tested and the reference resolution in the vertical direction.

Step 505: The terminal determines the horizontal resolution of the resolution of the display device under test according to the multiple relationship between the resolution of the display device under test and the reference resolution in the horizontal direction, and the horizontal resolution of the reference resolution.

Step 506: The terminal determines the vertical resolution of the display device to be tested according to the multiple relationship between the resolution of the display device to be tested and the reference resolution in the vertical direction, and the resolution in the vertical direction of the reference resolution. resolution.

Wherein, there is no necessary sequence relationship between step 505 and step 506. For example, step 505 may be executed first to determine the resolution in the horizontal direction of the resolution of the display device to be tested, or step 506 may be executed first to determine the resolution of the display device to be tested. The resolution in the vertical direction of the resolution.

Step 507: The terminal combines the resolution in the vertical direction of the resolution of the display device under test with the resolution in the vertical direction of the resolution of the display device under test to represent the resolution of the display device under test.

Based on the same inventive concept, an embodiment of the present invention also provides a terminal for detecting resolution. Since the problem-solving principle of the device is similar to that of the embodiment of the present invention, the implementation of the device can refer to the implementation of the method of the present invention, and repeated descriptions are omitted.

As shown in Figure 6, an embodiment of the present invention provides a terminal for detecting resolution including:

A target image determining module 601, configured to determine a target image obtained by photographing a preset image displayed in the display device to be tested;

An image identification module 602, configured to identify the image size of the preset image displayed on the display device under test according to the target image;

A resolution determining module 603, configured to determine the resolution of the display device under test according to the displayed image size, the image size of the preset image at a reference resolution, and the reference resolution;

Wherein, the image size is represented by the number of pixel units.

Optionally, the resolution determination module 603 is specifically configured to:

Determine the multiple relationship between the resolution of the display device to be tested and the reference resolution according to the displayed image size and the image size of the preset image at the reference resolution;

The resolution of the display device under test is determined according to the multiple relationship and the reference resolution.

Optionally, the image recognition module 602 is specifically used for:

According to the target image, identify the maximum number of pixel units in the vertical direction and the maximum number of pixel units in the horizontal direction displayed in the display device under test of the preset image.

Optionally, the resolution determination module 603 is specifically configured to:

According to the maximum number of pixel units in the vertical direction of the preset image displayed in the display device under test and the maximum number of pixel units in the vertical direction of the preset image at the reference resolution, determine the vertical direction multiple relationship; and

Determine the multiple relationship in the horizontal direction according to the maximum number of pixel units in the horizontal direction of the preset image displayed in the display device under test and the maximum number of pixel units in the horizontal direction of the preset image at the reference resolution;

Determine the resolution in the vertical direction of the display device under test according to the multiple relationship in the vertical direction and the resolution in the vertical direction in the reference resolution; and

Determine the resolution in the horizontal direction of the display device under test according to the multiple relationship in the horizontal direction and the resolution in the horizontal direction in the reference resolution.

Optionally, the shape of the preset image may be a square.

Optionally, the color of the edge area of the preset image is different from the color of the non-edge area;

Wherein, the edge area is an area composed of X pixels close to the edge of the preset image in each row of pixels of the preset image and Y pixels close to the edge of the preset image in each column of pixels, and X and Y are positive integers.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (10)

1. a kind of method of detection resolution is it is characterised in that include：

Terminal determines the target image being obtained by the pre-set image shooting display in display device to be measured；

Described terminal, according to described target image, identifies the image chi that described pre-set image shows in described display device to be measured Very little；

Described terminal according to the picture size of described display, picture size under reference resolution for the described pre-set image, and Described reference resolution, determines the resolution of described display device to be measured；

Wherein, described image size is represented by number of pixel cells amount.

2. the method for claim 1 is it is characterised in that described terminal is according to the picture size of described display, described pre- If picture size under reference resolution for the image, and described reference resolution, determine the resolution of described display device to be measured Rate, specifically includes：

Described terminal picture size under reference resolution according to the picture size and described pre-set image of described display, determines The resolution of display device to be measured and the multiple proportion of reference resolution；

Described terminal, according to described multiple proportion and described reference resolution, determines the resolution of described display device to be measured.

3. method as claimed in claim 2, it is characterised in that described terminal is according to described target image, identifies described default The picture size that image shows in described display device to be measured, specifically includes：

Described terminal, according to described target image, identifies the vertical side that described pre-set image shows in described display device to be measured Maximum pixel element number upwards, and the maximum pixel element number in horizontal direction.

4. method as claimed in claim 3 is it is characterised in that described terminal is according to the picture size of described display and described pre- If picture size under reference resolution for the image, determine that the resolution of display device to be measured is closed with the multiple of reference resolution System, specifically includes：

The maximum pixel unit number on vertical direction that described terminal shows according to pre-set image in described display device to be measured Amount with described pre-set image vertical direction under reference resolution on maximum pixel element number, determine on vertical direction times Number relation；And

The maximum pixel unit number in horizontal direction that described terminal shows according to pre-set image in described display device to be measured Amount with described pre-set image horizontal direction under reference resolution on maximum pixel element number, determine in horizontal direction times Number relation；

Described terminal, according to described multiple proportion and described reference resolution, determines the resolution of described display device to be measured, tool Body includes：

Described terminal according to the resolution on vertical direction in the multiple proportion on described vertical direction and described reference resolution, Determine the resolution of described display device in the vertical direction to be measured；And

Described terminal according to the resolution in horizontal direction in the multiple proportion in described horizontal direction and described reference resolution, Determine described display device to be measured resolution in the horizontal direction.

5. the method for claim 1 is it is characterised in that the color of the marginal area of described pre-set image and non-edge area The color in domain is different；

Wherein, described marginal area is X pixel in the every one-row pixels of described pre-set image near described pre-set image edge And near the region of the Y pixel composition at described pre-set image edge in every string pixel, X, Y are positive integer.

6. a kind of terminal of detection resolution is it is characterised in that this terminal includes：

Target image determining module, for determining the target figure being obtained by the pre-set image shooting display in display device to be measured Picture；

Picture recognition module, for according to described target image, identifying that described pre-set image is aobvious in described display device to be measured The picture size shown；

Resolution determining module, for according to the picture size of described display, figure under reference resolution for the described pre-set image As size, and described reference resolution, determine the resolution of described display device to be measured；

Wherein, described image size is represented by number of pixel cells amount.

7. terminal as claimed in claim 6 it is characterised in that described resolution determining module specifically for：

Picture size under reference resolution for the picture size and described pre-set image according to described display, determines display to be measured The resolution of equipment and the multiple proportion of reference resolution；

According to described multiple proportion and described reference resolution, determine the resolution of described display device to be measured.

8. terminal as claimed in claim 7 it is characterised in that described image identification module specifically for：

According to described target image, identify on the vertical direction that described pre-set image shows in described display device to be measured Big pixel cell quantity, and the maximum pixel element number in horizontal direction.

9. terminal as claimed in claim 8 it is characterised in that described resolution determining module specifically for：

According to the maximum pixel element number on the vertical direction that pre-set image shows in described display device to be measured with described Maximum pixel element number on pre-set image vertical direction under reference resolution, determines the multiple proportion on vertical direction； And

According to the maximum pixel element number in the horizontal direction that pre-set image shows in described display device to be measured with described Maximum pixel element number in pre-set image horizontal direction under reference resolution, determines the multiple proportion in horizontal direction；

According to the resolution on vertical direction in the multiple proportion on described vertical direction and described reference resolution, determine described The resolution of display device in the vertical direction to be measured；And

According to the resolution in horizontal direction in the multiple proportion in described horizontal direction and described reference resolution, determine described Display device to be measured resolution in the horizontal direction.

10. terminal as claimed in claim 6 is it is characterised in that the color of the marginal area of described pre-set image and non-edge The color in region is different；

Wherein, described marginal area is X pixel in the every one-row pixels of described pre-set image near described pre-set image edge Near the region of the Y pixel composition at described pre-set image edge, X, Y are positive integer with every string pixel.