CN106821300A - Color vision detection method and system - Google Patents

Abstract

A color vision detection method and system, wherein a picture storage unit provides a plurality of picture files, and the plurality of picture files are displayed through a display, wherein the light wavelengths corresponding to the plurality of picture files are different from each other. The method performs a preliminary detection stage to detect whether a subject is color blind. When it is detected that the subject is color blind, an advanced detection stage is then performed to detect the light wavelengths that the subject has difficulty recognizing. The present invention can not only detect whether the subject is color blind, but also detect which light wavelengths the subject has difficulty recognizing.

Description

Color vision detection method and system

technical field

The invention relates to a method and system for detecting color vision, which are used for detecting the color discrimination ability of a person under test.

Background technique

Ishihara's Color Blindness Test Chart is a common tool for testing color perception, which can be printed on paper or displayed on a computer screen. During the test, the subjects visually look at the Ishihara's color blindness test chart, and follow the tester's instructions to express the pictures and texts presented in the Ishihara's color blindness test chart in oral or other ways (such as body language). When the testee's color discrimination is abnormal, he cannot correctly express the pictures and characters presented in the Ishihara's color blindness test chart, so the Ishihara's color blindness test chart can be used to judge the testee's abnormal color vision (that is, color blindness).

However, Ishihara's color blindness test chart can only check whether there is color blindness, and cannot further detect which color is color blind. In addition, for testees with poor oral expression skills or difficulty in expressing, even if their color discrimination ability is normal, they may not be able to correctly express the pictures and characters presented in Ishihara's color blindness test chart, resulting in unobjective test results .

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and system for detecting color vision, which can objectively detect the color perception of the subject.

The color vision detection method of the present invention is implemented in a color vision detection system. The color vision detection system includes a picture storage unit, a display, an eyeball imaging unit and a processing unit. The processing unit is connected to the picture storage unit, the display and the eyeball. An imaging unit, the color vision detection method includes:

(a) multiple picture files are provided by the picture storage unit, the light wavelengths corresponding to the multiple picture files cover the range of visible light, and the corresponding light wavelengths are different from each other;

(b) Preliminary detection stage: the multiple picture files are played by the display according to the size of the light wavelength, and when each of the picture files is displayed, the eyeball image of the subject is obtained by the eyeball imaging unit for the processing The unit judges whether the movement state of the eyeball image corresponding to each of the picture files meets an abnormal condition;

(c) Advanced detection stage: When the processing unit judges that the motion state of any one of the picture files displayed in step (b) of the eyeball image meets the abnormal condition, control the display to display that the light wavelength is lower than and a plurality of image files higher than the wavelength of light to which any one image file corresponds; and

(d) When displaying each of the picture files described in step (c), the processing unit obtains the eyeball image of the subject through the eyeball imaging unit to determine that the eyeball image corresponds to the image displayed in step (c). Whether the motion state of each picture file meets the abnormal condition.

The color vision detection system of the present invention comprises:

A picture storage unit, which stores a plurality of picture files, the light wavelengths corresponding to the multiple picture files cover the range of visible light, and the corresponding light wavelengths are different from each other;

a display, which is used to play the plurality of picture files to a subject;

an eyeball imaging unit, used to obtain eyeball images of the subject when viewing the plurality of picture files; and

A processing unit, which is connected to the picture storage unit, the display and the eyeball imaging unit, the processing unit controls the display to play the multiple picture files according to the size of the light wavelength, and judges that the eyeball images correspond to the multiple pictures Whether the motion state of the gear meets an abnormal condition;

When the processing unit determines that the movement state of the eyeball image in any one of the picture files meets the abnormal condition, it controls the display to display a plurality of picture files with light wavelengths lower than and higher than the light wavelength corresponding to any picture file, And it is judged whether the movement state of each of the picture files corresponding to the eyeball image meets the abnormal condition.

According to the detection method and system of the present invention, first in step (c) the light wavelengths that the subject feels abnormal in recognition are initially detected, and then in step (c) and step (d) it is further detected which light wavelengths the subject is sensitive to There are situations of abnormal discrimination, so compared with the prior art, the present invention can not only detect the abnormality of the subject’s color discrimination, but also detect which light wavelengths the subject has obstacles to discern, so as to reflect the Colors that really feel handicapped. On the other hand, the movement state of the subject's eyeballs when recognizing colors is a reflex action, and the present invention judges the subject's color discrimination based on the eyeball image, so there is no need to go through the subject's oral or physical expression, so that the present invention The test results are more objective.

Description of drawings

Fig. 1: The schematic diagram of the circuit block of the color vision detection system of the present invention.

Figure 2: A schematic diagram of the three-dimensional appearance of the head-mounted detection device of the present invention.

Fig. 3: A schematic top view of the head-mounted detection device of the present invention.

Fig. 4: Flow chart of the color vision detection method of the present invention.

detailed description

The color vision detection method of the present invention is implemented in a color vision detection system. Please refer to FIG. 1 .

In one embodiment, please refer to FIG. 2 and FIG. 3, the display 20 and the eyeball imaging unit 30 can be arranged in a head-mounted housing 50 to form a head-mounted detection device, but not limited thereto. . The head-mounted housing 50 includes an opening 51 and an accommodating space 52 communicating with the opening 51. The opening 51 is curved to conform to the shape of the subject's face; the eyeball imaging unit 30 may include one or A plurality of cameras 31, the present embodiment takes two cameras 31 as an example, but not limited thereto, the two cameras 31 can be relatively arranged on the top side of the accommodating space 52 of the head-mounted housing 50 for Corresponding to the positions of the left and right eyeballs of the subject respectively; the display 20 can be a liquid crystal display (LCD) or light emitting diode (LED) and other light emitting devices, which are arranged in the accommodating space 52 of the head-mounted housing 50 Opposite to the other side of the opening 51 . Therefore, when the subject's face is close to the opening 51 of the head-mounted housing 50, the subject can watch the picture presented by the display 20, and the eye movement of the subject can be photographed by the eyeball imaging unit 30 , and the head-mounted housing 50 can isolate external light, so that the subject can focus on watching the image of the display 20 and avoid being disturbed by ambient light.

The picture storage unit 10 can be a general hard disk (HDD), solid state disk (SSD), cloud hard disk or other devices capable of storing digital content. The processing unit 40 can be a computer with computing and processing capabilities, such as a notebook computer or a desktop computer. The processing unit 40 can be connected with the picture storage unit 10, the display 20 and the eyeball imaging unit 30 in a wired or wireless manner. line for data transmission.

Please refer to Fig. 4, the color vision detection method of the present invention comprises the following steps:

Step S101: Provide multiple picture files. The picture storage unit 10 stores a plurality of picture files, the wavelengths of light corresponding to the multiple picture files are different from each other, and the multiple picture files can present geometric shapes, and the color display can be displayed in multiple colors at the same time in addition to monochromatic display. show. In one embodiment, the plurality of image files are respectively a first image file, a second image file, a third image file, ..., an nth image file, and the light wavelength corresponding to the first image file is x nanometers, the light wavelength corresponding to the second picture file is x+y nanometers, the light wavelength corresponding to the third picture file is x+2y nanometers, and so on, the light wavelength corresponding to the nth picture file is x+(n-1)y nanometers, and the light wavelengths corresponding to the first picture file to the nth picture file cover the range of visible light (for example, 400 nanometers to 700 nanometers), where x is a light wavelength reference value, which can be used as The starting point of the visible light range, y is the difference of light wavelengths corresponding to two adjacent picture files. For example, the light wavelength corresponding to the first picture file can be 400 nanometers (ie x=400), when y=5, then the light wavelength corresponding to the second picture file is 405 nanometers, and the light wavelength corresponding to the third picture file The wavelength of light is 410 nanometers, and so on.

Step S102: Preliminary detection stage: Detect whether the subject is color-blind. The processing unit 40 controls the display 20 to play the plurality of picture files according to the size of the light wavelength, and when each of the picture files is displayed, the eyeball image of the subject is obtained through the eyeball imaging unit 30, so that the processing unit 40. Determine whether the movement state of the eyeball image corresponding to each of the picture files meets an abnormal condition.

In one embodiment, the processing unit 40 controls the display 20 to display backwards at intervals from the first image file according to an interval of M nanometers. Taking M=30 as an example, the display 20 sequentially displays the images corresponding to the wavelengths of light. The first picture file of 400 nanometers (that is, the full purple picture), the seventh picture file corresponding to the light wavelength of 430 nanometers, the 13th picture file corresponding to the light wavelength of 460 nanometers, and so on until the display is complete The last stroke of the plurality of picture files in the picture storage unit 10 . It should be noted that the human eye can clearly perceive changes in the wavelength of light above 30 nanometers, so the M nanometer range is at least 30 nanometers.

On the other hand, when the display 20 displays each picture file in the aforementioned step S102, the eyeball imaging unit 30 captures the eyeball image of the subject, and transmits the eyeball image to the processing unit 40, and the processing unit 40 Determine the movement state of the eyeball image corresponding to each of the image files by means of image processing. For example, if the subject can normally interpret the image presented by the display 20, his eyeball movement is relatively active, and the eyeball image is a dynamic image; otherwise, if the subject has doubts about the image displayed on the display 20 or When it cannot be interpreted, the eyeball movement will be stagnant for a long time, and the eyeball image is a still image.

Therefore, when the processing unit 40 determines that the resting time of the eyeball image reaches a threshold time, it can determine that the abnormal condition is met. For example, when the subject's eyeball image remains still for a threshold time of 10 seconds, it is determined that the abnormal condition is met.

Step S103: advanced detection stage: detecting the wavelength of light that the subject feels discriminated against. When the processing unit 40 judges that the movement state of any picture file of the eyeball image in the picture files displayed in step S102 meets the abnormal condition, it means that the person under test has difficulty in recognizing the light wavelength corresponding to any picture file. In the case of any picture file, the processing unit 40 controls the display 20 to sequentially display a plurality of picture files whose light wavelength is lower than or higher than the corresponding light wavelength of any picture file.

In one embodiment, when the processing unit 40 judges that the movement state of an i-th picture file of the eyeball image in the picture files displayed in step S102 meets the abnormal condition, it means that the subject's reaction to the i-th picture file is If the corresponding light wavelength has an identification barrier, the processing unit 40 controls the display 20 to sequentially display an i-1th picture file, an i-1+(M/y ) picture file and one i-1+2(M/y) picture file, and one i+1 picture file, one i+1+(M/y) picture file and one i+1+2( M/y) picture file. Wherein, the light wavelength of the i-1th picture file is lower than the light wavelength of the i-th picture file, and the light wavelength of the i+1th picture file is lower than the light wavelength of the i-th picture file.

For example, when the processing unit 40 judges that the subject has difficulty recognizing the seventh picture file (i=7), the processing unit 40 controls the display 20 to display the sixth picture file, the 12th picture file and the The eighteenth picture file, and the eighth picture file, the fourteenth picture file and the twentieth picture file are sequentially displayed. Wherein, the distance between the light wavelengths of the sixth picture file, the 12th picture file and the 18th picture file is 30 nanometers, and the light wavelength distance between the eighth picture file, the 14th picture file and the 20th picture file is 30 nanometers.

Step S104: Determine the degree of color vision impairment. When displaying each of the picture files described in step S103, the processing unit 40 obtains the eyeball image of the subject through the eyeball imaging unit 30 to determine that the eyeball image corresponds to each of the picture files displayed in step S103. Whether the motion state of the user meets the exception condition. In this way, since the wavelength of light displayed in step S104 is based on the wavelength of light that the subject feels discriminated against in step S102, the judgment result of the processing unit 40 in step S104 can reflect the wavelength of light that the subject actually feels impaired.

Further, in step S104, when the processing unit 40 judges that the movement state of the eyeball image corresponding to each of the image files displayed in step S103 still meets the abnormal condition, the processing unit 40 can further control the display 20 to display the following A picture file in the first-order wavelength range, and judging whether the picture file corresponding to the eyeball image still meets the abnormal condition. For example, an i-2th image file, an i-2+(M/y)th image file, an i-2+2(M/y)th image file, and an i+2th image file are displayed in sequence, An i+2+(M/y)th picture file and an i+2+2(M/y)th picture file.

When the processing unit 40 determines that the eyeball image corresponds to the i-2, i-2+(M/y), i-2+2(M/y), i+2, i+2+(M/y) Any one of the picture files in y) and i+2+2(M/y) picture files still meets the abnormal condition, then control the display 20 to display the picture file of the next-order light wavelength range, that is, display the i- 3. i-3+(M/y), i-3+2(M/y), i+3, i+3+(M/y) and i+3+2(M/y) picture files, And judge whether any picture file corresponding to the eyeball image meets the abnormal condition, and so on, until the processing unit 40 judges that the eyeball image does not meet the abnormal condition, and then determine the light wavelength that the subject recognizes abnormality.

Claims (10)

1. a kind of colour vision detection method, it is characterised in that the colour vision detection method is implemented on a colour vision detecting system, the color Feel that detecting system includes a picture storage element, a display, an eyeball taking unit and a processing unit, the processing unit Picture storage element, the display described in line and the eyeball taking unit, the colour vision detection method are included：

A () provides multiple picture shelves by the picture storage element, the optical wavelength corresponding to the multiple picture shelves covers visible Optical range, and corresponding optical wavelength is different from each other；

(b) Preliminary detection stage：The multiple picture shelves are played according to the size of optical wavelength by the display, and it is each in display During the picture shelves, an eyeball image of measured is obtained by the eyeball taking unit, judged with by the processing unit Whether the motion state that the eyeball image corresponds to each picture shelves meets an exceptional condition；

(c) advanced detection-phase：When the processing unit judges that the eyeball image shown picture shelves in step (b) are worked as When the motion state of middle any picture shelves meets the exceptional condition, the display display optical wavelength is controlled to be less than and be higher than Multiple pictures shelves of the corresponding optical wavelength of any picture shelves；And

D during () each described picture described in step display (c) grade, the processing unit is taken by the eyeball taking unit The eyeball image of measured is obtained, to judge that the eyeball image corresponds to the fortune of each picture shelves shown by step (c) Whether dynamic state meets the exceptional condition.

2. colour vision detection method according to claim 1, it is characterised in that in the step (a), the multiple picture Shelves be respectively one first picture shelves, second picture shelves, one the 3rd picture shelves ..., one n-th picture shelves, first picture shelves Corresponding light wave is a length of x nanometers, and the light wave corresponding to the second picture shelves is a length of x+y nanometers, the 3rd picture shelves institute Corresponding light wave is a length of x+2y nanometers, and the rest may be inferred, and wherein x is the starting point of the visible-range, and y is adjacent two picture shelves The measures of dispersion of corresponding optical wavelength；

In the step (b), the processing unit controls the display, interval from first picture according to a M nanometers Shelves compartment of terrain shows backward, and when each picture shelves are shown, is obtained described in measured by the eyeball taking unit Eyeball image, to judge that the eyeball image corresponds to the motion state of each picture shelves；

In the step (c), any picture shelves are one i-th picture shelves, and the processing unit judges the eyeball figure As when the motion state of i-th picture shelves meets the exceptional condition, controlling the display sequentially to show the multiple One i-th -1 picture shelves, one i-th -1+ (M/y) picture shelves and one i-th -1+2 (M/y) picture shelves, and one i-th in the middle of picture shelves + 1 picture shelves, an i+1+(M/y) picture shelves and i+1+2 (M/y) picture shelves.

3. colour vision detection method according to claim 2, it is characterised in that in the step (d), is showing the step Suddenly during each described picture shelves described in (c), the processing unit obtains the eyeball image of measured, to judge the eye The motion state of each described picture shelves of the ball image described in the step (c), to judge that the eyeball image corresponds to institute Whether the motion state for stating shown each picture shelves in step (c) meets the exceptional condition；

If meeting the exceptional condition, the display is further controlled sequentially to show one i-th -2 picture shelves, one i-th -2+ (M/y) picture shelves and one i-th -2+2 (M/y) picture shelves, and one i-th+2 picture shelves, one i-th+2+ (M/y) picture shelves and one the I+2+2 (M/y) picture shelves, and judge whether the eyeball image meets corresponding to the motion state of central each described picture shelves The exceptional condition；The rest may be inferred, until the processing unit judges that the eyeball image does not meet the exceptional condition.

4. colour vision detection method according to claim 1, it is characterised in that when the processing unit judges the eyeball The quiescent time of image reaches the threshold time, is judged as meeting the exceptional condition.

5. the colour vision detection method according to Claims 2 or 3, it is characterised in that when the processing unit judge it is described The quiescent time of eyeball image reaches the threshold time, is judged as meeting the exceptional condition.

6. the colour vision detection method according to Claims 2 or 3, it is characterised in that x=400, y=5, M=30.

7. colour vision detection method according to claim 5, it is characterised in that x=400, y=5, M=30.

8. a kind of colour vision detecting system, it is characterised in that the colour vision detecting system is included：

One picture storage element, the multiple picture shelves of its storage, the optical wavelength corresponding to the multiple picture shelves covers visible ray model Enclose, and corresponding optical wavelength is different from each other；

One display, it is used to play a measured the multiple picture shelves；

One eyeball taking unit, is used to obtain the eyeball image when measured watches the multiple picture shelves；And

One processing unit, picture storage element, the display and the eyeball taking unit, the treatment list described in its line Unit's control display plays the multiple picture shelves according to the size of optical wavelength, and it is described to judge that the eyeball image corresponds to Whether the motion state of multiple picture shelves meets an exceptional condition；

When the processing unit judges that the eyeball image meets the abnormal bar in the motion state of central any picture shelves During part, the display display optical wavelength is controlled to be less than and higher than multiple pictures of the corresponding optical wavelength of any picture shelves Shelves, and judge whether the eyeball image meets the exceptional condition corresponding to the motion state of central each described picture shelves.

9. colour vision detecting system according to claim 8, it is characterised in that described stored by the picture storage element Multiple pictures shelves be respectively one first picture shelves, second picture shelves, one the 3rd picture shelves ..., one n-th picture shelves, described the Light wave corresponding to one picture shelves is a length of x nanometers, and the light wave corresponding to the second picture shelves is a length of x+y nanometers, and the described 3rd Light wave corresponding to picture shelves is a length of x+2y nanometers, and the rest may be inferred, and wherein x is the starting point of the visible-range, and y is adjacent The measures of dispersion of the optical wavelength corresponding to two pictures shelves.

10. colour vision detecting system according to claim 8 or claim 9, it is characterised in that when the processing unit judge it is described The quiescent time of eyeball image reaches the threshold time, is judged as meeting the exceptional condition.