CN1254773C - Device and method for generating interlaced stereoscopic images - Google Patents

Abstract

A device for generating an interlaced stereoscopic image mainly comprises a stereoscopic image engine, an interlaced data processor and a counter. The stereoscopic image engine generates a reduced left-eye image and a reduced right-eye image of a stereoscopic image based on a video source data, wherein the dimensions of the reduced left-eye image and the reduced right-eye image in the vertical direction are reduced compared to the video source data. The interleaved data processor stores the reduced left-eye image and the reduced right-eye image in two adjacent memory segments, and scans the two adjacent memory segments when displaying the stereoscopic image. The counter controls the row number of the display area, so that the rows of the reduced left eye image and the reduced right eye image can reach the display area in an interlaced mode. The invention also discloses a method for generating the interlaced three-dimensional image.

Description

Device and method for generating interlaced stereoscopic images

technical field

The invention relates to a device and method for generating a stereoscopic image, in particular to a device and method for generating an interlaced stereoscopic image.

Background technique

The reason why human beings have stereoscopic vision is that the human eyes can perceive the external scene independently, that is, the left eye sees the left eye scene, the right eye sees the right eye scene, there is a difference in angle between the two, and then Through the natural fusing of the brain, a three-dimensional scene can be presented in the brain.

3D stereo display (3D stereo display) is to allow the left and right eyes to see the reduced left-eye image and the reduced right-eye image with an angle difference respectively, so that the viewer can see the three-dimensional image. In order to achieve this goal, one method is to let the display alternately display the reduced left-eye image and the reduced right-eye image, and the viewer wears a pair of LCD shutter glasses, the left and right lenses of which can alternately allow light to pass through, and switch The action of the display is synchronized with the vertical retrace of the display. In this way, when the switching frequency reaches a certain level, the viewer can watch the stereoscopic image.

Since displaying stereoscopic images requires faster computing power and larger image storage space, in the prior art, a variety of technologies have been developed to speed up the data computing speed of stereoscopic images or reduce the need for displaying stereoscopic images. memory space. For example, the interlace display technique is to display the reduced left-eye image on the odd-numbered columns of the display, and the reduced right-eye image to display on the even-numbered columns of the display. In this way, the amount of data of the reduced left-eye image and the reduced right-eye image can be reduced to half of the original entire image.

Please refer to FIG. 1, take a display 8 with a resolution of 10×10 (that is, there are 10 columns in the display screen) as an example, when the interlaced display technology is used, the video memory (video memory) 1 stores two image data with a size of 10×5 reduced left-eye image 11 and reduced right-eye image 12 . When displaying the reduced left-eye image, the columns of the reduced left-eye image 11 are displayed on the 1st, 3rd, 5th, 7th and 9th columns of the display, and the 2nd, 4th, 6th, 8th and 10th columns can be blank. Similarly, when displaying the reduced right-eye image, each row of the reduced right-eye image 12 is displayed on the 2nd, 4th, 6th, 8th and 10th row of the display, and the 1st, 3rd, 5th, 7th and 9th row can be blank. There are many different implementations of the interlaced display technology, such as line-blanking and sync-doubling.

However, in the prior art, when displaying 3D images with the interlaced display technology, the left-eye image and the right-eye image need to be processed in advance. When a 3D stereoscopic image is to be generated quickly and in real time, for example, each page frame of a 3D animation is continuously generated, using software to implement the interlaced display technology has a problem that the response speed is too slow, resulting in flickering. Therefore, how to speed up the real-time processing speed of the interlaced display technology has become an important issue to be solved.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a device and method for generating an interlaced stereoscopic image, which can accelerate the real-time processing speed of the interlaced stereoscopic image and reduce the memory required for displaying 3D stereoscopic images.

To achieve the above purpose, the device for generating interlaced stereoscopic images according to the present invention mainly includes a stereoscopic image engine, an interlaced data processor and a counter. The stereoscopic image engine generates a reduced left-eye image and a reduced right-eye image of a stereoscopic image based on a video source data, and the vertical dimensions of the reduced left-eye image and the reduced right-eye image are reduced compared with the video source data. The interleaved data processor stores the reduced left-eye image and the reduced right-eye image in two adjacent storage segments, and scans the two storage segments when displaying stereoscopic images. The counter controls the number of columns in a display area, so that the columns of the reduced left-eye image and the reduced right-eye image can arrive at the display area in a staggered manner.

The vertical size of the reduced left-eye image and the reduced right-eye image can be reduced to half of the vertical size of the display area. The size of the reduced left-eye image and the reduced right-eye image in the horizontal direction may be the same as the size of the display area in the horizontal direction.

The interlaced stereoscopic image generating device may further include a storage device for storing the aforementioned reduced left-eye image and reduced right-eye image. The storage device may have two frame buffers, one of which stores the reduced left-eye image and the reduced right-eye image currently being displayed, and the other stores the reduced left-eye image and reduced right-eye image to be displayed next. The storage device can be a dynamic random access memory (DRAM) or a synchronous dynamic random access memory (SDRAM).

The display area can be located on a display with a micro-retarder. The micro-retarder makes the odd and even columns of the display area have different polarization directions. In this way, through a pair of polarized glasses with different polarization directions of the left and right lenses, the left and right eyes of the viewer can see different images, that is, the left eye only sees the left eye image, and the right eye only sees the right eye image.

According to the method for generating an interlaced stereoscopic image of the present invention, the reduced left-eye image and the reduced right-eye image of a stereoscopic image are stored in two adjacent storage segments after generation. When displaying stereoscopic images, the two storage segments are scanned. By controlling a column number of a display area, the method provided by the present invention enables the columns of the reduced left-eye image and the reduced right-eye image to reach the display area in an alternate manner.

Before starting to scan the memory segment, the counter that controls the column number is reset to zero. The counter is incremented by one before displaying one of the columns of the reduced left-eye image or the reduced right-eye image.

When the storage device has two frame buffers, before preparing the stereoscopic image, the method provided by the present invention can first determine which frame buffer is used to store the stereoscopic image being processed. After the scanning of the storage segment ends, the method provided by the present invention can also determine whether to switch to another frame buffer.

Because the present invention implements the display of the interlaced stereoscopic image with a hardware framework, and processes and displays the stereoscopic image by storing the left-eye image and the right-eye image in adjacent memory segments and controlling the column number of the display area , so the efficiency of image processing and display can be improved, and the usage of memory can be reduced at the same time.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

FIG. 1 is a schematic diagram showing an example of using interlaced display technology to display stereoscopic images in the prior art;

FIG. 2 is a block diagram showing the structure of an interlaced stereoscopic image generating device according to a preferred embodiment of the present invention;

FIG. 3 is a schematic diagram showing the process of interlaced stereoscopic image generation in a preferred embodiment of the present invention;

FIG. 4 is a flowchart showing the process of storing a stereoscopic image to a storage device in the generation of an interlaced stereoscopic image according to a preferred embodiment of the present invention;

FIG. 5 is a flowchart showing the process of displaying a stereoscopic image to a display in the generation of an interlaced stereoscopic image according to a preferred embodiment of the present invention.

Explanation of symbols in the figure:

1 storage device

11 Zoom out left eye image

11a Zoom out left eye image

11b Zoom out left eye image

12 Zoom out the right eye image

12a Zoom out the right eye image

12b Zoom out the right eye image

14 Video source data

2 storage device controller

3 Stereo image engine

4 Interleaved data processor

401~405 The process of storing the stereoscopic image to the storage device

501～511 The process of outputting the stereoscopic image to the display

6 counters

8 monitors

81 Micro delayer

9 polarized glasses

Detailed ways

The apparatus and method for generating an interlaced stereoscopic image according to preferred embodiments of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

Please refer to Fig. 2, the generation device of the interlaced stereoscopic image according to the preferred embodiment of the present invention is implemented in a computer system, and mainly includes a storage device 1, a storage device controller 2, a stereoscopic image engine (3D graphics engine ) 3, and an interleaved data processor 4. The device cooperates with a display 8 and with polarized glasses 9 . The display 8 is provided with a micro-retarder 81 .

The storage device 1 can be any device capable of storing image data. For example, dynamic random access memory (DRAM) or synchronous dynamic random access memory (SDRAM). In this implementation, the storage device 1 has two page frame buffers, namely page frame buffer A and page frame buffer B. When playing the stereoscopic animation, the page frame buffer A stores the reduced left-eye image 11a and the reduced right-eye image 12a of the currently displayed page frame, and the page frame buffer B stores the reduced left-eye image of the next page frame to be displayed. Eye image 11b and reduced right eye image 12b.

The storage device controller 2 controls the data access and movement actions in the storage device 1, which accepts and interprets (interpret) the requests of other components, and confirms the address of the data in the storage device, so that the data is read by the storage device, Or write data to the storage device.

The stereoscopic image engine 3 receives the video source data transmitted via the bus, and converts it into reduced left-eye images and reduced right-eye images with angle differences. The stereoscopic image engine 3 can be a microprocessor generally disposed on a display card for processing 3D graphics, or a software or hardware module with similar functions.

In this implementation, a micro retarder (micro retarder) 81 is provided on the screen of the display 8, so that the polarization directions of odd columns and even columns on the screen of the display are different. When watching the picture displayed on the monitor, the viewer wears a pair of polarized glasses (polarized glasses) 9 . The polarization directions of the left and right lenses of the polarized glasses 9 are different, so that the left eye of the viewer only receives images of odd columns, and the right eye only receives images of even columns. It should be noted that the display 8 is an LCD display with a micro delay, and an analog or digital input signal is selected according to the specifications of the LCD display itself.

The interleaved data processor 4 stores the reduced left-eye image and the reduced right-eye image in two adjacent storage segments through the storage device controller 2 . Please refer to FIG. 3 , in this embodiment, when generating a stereoscopic image, the geometric size of the video source data 14 is first reduced to half in the vertical direction. Therefore, when the reduced left-eye image 11 and the reduced right-eye image 12 are generated, the vertical size of the generated reduced left-eye image 11 and reduced right-eye image 12 is only half of the video source data 14 . The interleaved data processor 4 stores the reduced left-eye image 11 and the reduced right-eye image 12 in one of the two frame buffers of the storage device 1 and in two adjacent storage segments.

When the image is output to the display area of the display 8, since the reduced left-eye image 11 and the reduced right-eye image 12 are stored in adjacent storage segments, the reduced left-eye image 11 and the reduced right-eye image 12 will be interleaved. is read. That is, when scanning the first column of the frame buffer, the first column of the reduced left-eye image 11 will be scanned first, and then the first column of the reduced right-eye image 12 will be scanned. In this way, when output to the display 8, the first column of the display area on the display 8 will display the first column of the reduced left-eye image 11, and the second column of the display area on the display 8 will display the first column of the reduced right-eye image 12 . Similarly, when scanning the second column of the frame buffer, the second column of the reduced left-eye image 11 will be scanned first, and then the second column of the reduced right-eye image 12 will be scanned. In this way, when output to the display 8 , the third column of the display area on the display 8 will display the second column of the reduced left-eye image 11 , and the fourth column of the display area will display the second column of the reduced right-eye image 12 .

When scanning the frame buffer, the counter 6 controls the column number currently displayed on the display 8, so that the image data transmitted in the first-in-first-out (FIFO, first-in, first-out) order can be correctly displayed on the display 8 .

After the columns of the frame buffer are scanned, the screen displayed in the display area is as shown in FIG. 3 , the odd columns display the columns for reducing the left-eye image 11 , and the even columns display the columns for reducing the right-eye image 12 . As mentioned above, with the combination of the micro-retarder 81 and the polarizing glasses 9, the viewer's left eye will only receive the odd-numbered images, and the right eye will only receive the even-numbered images. In this way, the viewer will perceive a three-dimensional image.

Please refer to Fig. 4, when receiving the video source data, the stereo image engine will first reduce the geometric size of the video source data in the vertical direction to half of the original (step 401), and then generate A reduced left-eye image and a reduced right-eye image of a stereoscopic image (step 403 ). Since the geometric size of the video source data in the vertical direction is reduced when the stereoscopic image is generated, the reduced left-eye image and the reduced right-eye image are both reduced images.

Since in this embodiment, the frame buffer adopts a double-buffer structure, so before generating the reduced left-eye image and the reduced right-eye image, it is necessary to decide which frame buffer to store the stereoscopic image in processing (step 402). For example, if the 3D image being displayed is output from the frame buffer A, the 3D image engine 3 may store the processed image data in the frame buffer B. After the image data in the frame buffer B has been processed, the display 8 can output the image data in the frame buffer B. At this time, the stereoscopic image engine 3 can store the image data being processed in the frame buffer A instead.

After the frame buffer for storing image data is determined, the reduced left-eye image and the reduced right-eye image being processed are stored in adjacent storage segments in the frame buffer (step 404 ). Then, after coordinating factors such as the update speed of the display, if the next page frame is to be processed, return to step 401, otherwise end the page frame preparation process (step 405).

Please refer to FIG. 5, when a stereoscopic image is displayed, the interlaced stereoscopic image generating device according to a preferred embodiment of the present invention will first reset the counter to zero (step 501), and then start from the beginning of a frame buffer The location starts scanning (step 502). Since the reduced left-eye image and the reduced right-eye image of a stereoscopic image are stored in adjacent storage segments, when the first column of the page frame buffer is scanned, the first column of the reduced left-eye image and the reduced right-eye image The first column of the image will be read sequentially. At this time, first add one to the counter (step 503) to make the number change from zero to one, and display the first column of the reduced left-eye image on the first column of the display according to the number of the counter (step 504) Then add one to the counter (step 505) to make its number change from one to two, and display the first column of the reduced right-eye image on the second column of the display (step 506) according to the number of the counter.

After scanning the first column of the page frame display area, because the scanning of the page frame buffer has not yet ended (step 507), so the next column of the page frame buffer, that is, the second column will continue to be scanned (step 510), and Then add one to the counter so that the number in the counter changes from two to three. In this way, by scanning each column of the frame buffer and using the counter to control the number of display columns of the display, the reduced left-eye image and the reduced right-eye image can be displayed on the display in a column-by-column interlaced manner.

If the page frame buffer has been scanned, it is determined whether to switch to another page frame buffer (step 508). If the reduced left-eye image and the reduced right-eye image in another frame buffer have been prepared, then the switching action of the frame buffer is performed (step 511), for example, the storage device address pointer of the initial scan is pointed to another The starting address of the page frame buffer.

If the current page frame buffer has been scanned and is not switched to another page frame buffer, it is judged whether playback has been completed. If the reason for not switching to another page frame buffer is that the data stored in the current page frame buffer is the data of the last page frame, then the whole process is ended. If the reason for not switching to another frame buffer is that the data in the next frame buffer is not ready, then the reduced left-eye image and the reduced right-eye image in the current frame buffer will be displayed on the display again.

According to this embodiment, when playing multiple page frames continuously, such as playing animation, the above-mentioned processes in FIG. 4 and FIG. 5 may be performed simultaneously. In other words, the method for generating an interlaced stereoscopic image disclosed in this embodiment simultaneously prepares stereoscopic image data in one frame buffer and displays the image data in another frame buffer to the display. In this way, the image processing speed can be accelerated, and the occurrence probability of image delay when playing animation is reduced.

It should be noted that those skilled in the art can make various equivalent modifications and changes to the above content without departing from the spirit and scope of the present invention. For example, the device for generating an interlaced stereoscopic image provided by the present invention can also be implemented in a television set, an electronic game machine or any other electrical appliance with image display function. In addition, in the above-mentioned embodiments, the storage device adopts a double buffer structure. However, those skilled in the art may also adopt other buffer structures, such as using a single frame buffer to display stereoscopic images.

Therefore, the above description is only illustrative, not restrictive. Any equivalent modification or change without departing from the spirit and scope of the present invention shall be included in the scope of the claims.

Claims (21)

1. the generation device of an interleave type stereo image comprises:

One stereopsis engine, it produces one of a stereopsis based on a video source data and dwindles left-eye images and and dwindle right-eye image, and this dwindles left-eye images and this, and to dwindle right-eye image size in vertical direction reduced compared to this video source data;

One intercrossed data processor, it dwindles left-eye images and this with this and dwindles right-eye image and be stored in the two adjacent storage sections, and scans this storage sections when showing this stereopsis;

One counter, the column number that it controls a viewing area makes this dwindle left-eye images and this each row that dwindles right-eye image can arrive at this viewing area with interlace mode; And

One memory storage, it stores this and dwindles left-eye images and this dwindles right-eye image.

2. the generation device of interleave type stereo image as claimed in claim 1 is characterized in that: this dwindles left-eye images and dwindles right-eye image with this and become half of the size of this viewing area on vertical direction in the size on the vertical direction is reduced.

3. the generation device of interleave type stereo image as claimed in claim 1 is characterized in that: this dwindle left-eye images and this dwindle right-eye image in the size on the horizontal direction and this viewing area measure-alike on horizontal direction.

4. the generation device of interleave type stereo image as claimed in claim 1, it is characterized in that: this memory storage has a page frame buffer zone, and this dwindles left-eye images and this and dwindles right-eye image and be stored in this page frame buffer zone.

5. the generation device of interleave type stereo image as claimed in claim 1, it is characterized in that: this memory storage has two page frame buffer zones, dwindling left-eye images and dwindling right-eye image during one of this page frame buffer zone stores and shows at present, another of this page frame buffer zone store dwindling left-eye images and dwindling right-eye image of then showing.

6. the generation device of interleave type stereo image as claimed in claim 1 is characterized in that: also comprise: a storage controller, its control in this memory storage data access with move action.

7. the generation device of interleave type stereo image as claimed in claim 1, it is characterized in that: this memory storage comprises a dynamic RAM.

8. the generation device of interleave type stereo image as claimed in claim 1, it is characterized in that: this memory storage comprises a synchronous dynamic RAM.

9. the generation device of interleave type stereo image as claimed in claim 1, it is characterized in that: this viewing area is positioned at a display, and this display is provided with a little delayer, makes the odd column of this viewing area different with the polarised direction of even column.

10. computer system comprises:

One memory storage, it has at least one page frame buffer zone;

One storage controller;

One stereopsis engine, it produces one of a stereopsis based on a video source data and dwindles left-eye images and and dwindle right-eye image, and this dwindles left-eye images and this, and to dwindle right-eye image size in vertical direction reduced compared to this video source data size in vertical direction;

One intercrossed data processor, it sees through this storage controller and will dwindle left-eye images at this and dwindle right-eye image with this and be stored in two adjacent in this page frame buffer zone storage sections, and scans this storage sections when this stereopsis of demonstration; And

One counter, the column number that it controls a viewing area makes this dwindle left-eye images and this each row that dwindles right-eye image can arrive at this viewing area with interlace mode in through after the conversion of this numeral/digital quantizer.

11. computer system as claimed in claim 10 is characterized in that: the number of the page frame buffer zone that this memory storage had is two.

12. computer system as claimed in claim 10 is characterized in that: this memory storage comprises a dynamic RAM.

13. computer system as claimed in claim 10 is characterized in that: this memory storage comprises a synchronous dynamic RAM.

14. computer system as claimed in claim 10 is characterized in that: also comprise:

One display, this viewing area is positioned at this display, and this display is provided with a little delayer, makes the odd column of this viewing area different with the polarised direction of even column.

15. the production method of an interleave type stereo image comprises:

Produce one of a stereopsis based on a video source data and dwindle left-eye images and and dwindle right-eye image, this dwindles left-eye images and this, and to dwindle right-eye image size in vertical direction reduced compared to this video source data;

This is dwindled left-eye images and this dwindles right-eye image and is stored in the two adjacent storage sections; And

Scan this storage sections, and the column number by control one viewing area, each that makes this dwindle that left-eye images dwindles right-eye image with this is listed as and can arrives at this viewing area with interlace mode.

16. the production method of interleave type stereo image as claimed in claim 15 is characterized in that: this dwindles left-eye images and dwindles right-eye image with this and become half of the size of this viewing area on vertical direction in the size on the vertical direction is reduced.

17. the production method of interleave type stereo image as claimed in claim 15 is characterized in that: this dwindle left-eye images and this dwindle right-eye image in the size on the horizontal direction and this viewing area measure-alike on horizontal direction.

18. the production method of interleave type stereo image as claimed in claim 15 is characterized in that: also comprise:

The stereopsis of decision in which page frame buffer zone storage is handled.

19. the production method of interleave type stereo image as claimed in claim 15 is characterized in that: this column number is to control by a counter.

20. the production method of interleave type stereo image as claimed in claim 19 is characterized in that: this step of controlling this column number comprises:

Before beginning to scan this storage sections, this counter is made zero; And

Show this dwindle left-eye images maybe this dwindle wherein row of right-eye image before, this register is added one.

21. the production method of interleave type stereo image as claimed in claim 15 is characterized in that: this adjacent storage sections is arranged in a page frame buffer zone, and this method also comprises:

Behind the end of scan of this storage sections, judge whether to switch to another page frame buffer zone.

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