CN1444186A - Apparatus suitable for producing real-time stereoscopic video - Google Patents

Abstract

A device suitable for producing the real-time stereoscopic film, including a drawing engine, a memorizer and a stereoscopic image generator; the graphics engine provides a synchronization signal and generates a left-eye image and a right-eye image according to a horizontal offset calculated from the three-dimensional graphics animation, wherein the horizontal offset between the left-eye and right-eye images provides an illusion of depth, the left-eye and right-eye images being temporarily stored in memory; then, the stereoscopic image generator retrieves the left-eye image and the right-eye image from the memory in response to the synchronization signal to generate a first color-biased filtered left-eye image and a second color-biased filtered right-eye image, such that each of the filtered images is biased toward one of the two complementary colors; the depth perception of the scene can be generated by viewing the filtered left eye image and the filtered right eye image through a pair of stereoscopic glasses.

Description

Apparatus suitable for producing real-time stereoscopic video

technical field

The present invention relates to the field of three-dimensional (three-dimensional, 3D) computer graphics, in particular to a device suitable for producing real-time anaglyphs, which can produce a sense of depth when viewed through anaglyph spectacles.

Background technique

The use of computer systems to generate images often requires natural 3D image simulation, and general images lack realism because they do not provide a sense of depth. At present, there are many designs and developments to produce stereoscopic images to achieve 3D effects, one of which is to provide left-eye and right-eye images for a single two-dimensional image and take turns show. The viewer wears glasses with liquid crystal shutters (liquid crystal shuttered spectacles) to watch the above left and right eye images. The glasses with shutters are synchronized with the display signal to allow one eye to see only the appropriate More specifically, when the right-eye image is displayed, the right-eye LCD shutter opens, and when the left-eye image is displayed, the left-eye LCD shutter opens. In this way, the viewer fuses or synthesizes the left-eye and right-eye images in his mind to produce a sense of depth, and the size of the offset between the components in the left-eye image and the components in the right-eye image determines the The perceived depth for this component in a composite stereo image.

Contents of the invention

Another technique for providing a three-dimensional impression is to use the so-called anaglyph technique. An anaglyph image generally includes two images of different colors, preferably complementary colors. The principle of stereoscopic video is roughly the same as the technology mentioned above: the viewer is provided with separate left-eye and right-eye images, and the horizontal offset between the left-eye and right-eye images can make the viewer produce the illusion of depth. ). The three-dimensional video viewed by the viewer contains two images with different colors for the same scene, such as red and blue-green, and moves horizontally. The viewer can wear a kind of stereoscopic glasses (anaglyph spectacles). The left eye and right eye images of the three-dimensional film are watched by the lens. For example, the viewer can only see the blue-green image with the blue-green lens, and can only see the reddish image with the red lens, thereby affecting the left and right eyes. Provides separated images. The advantage of this method is that the cost of the 3D glasses is much lower than the above-mentioned glasses with liquid crystal shutters, and there is no need to provide an external signal for the synchronization of the 3D glasses.

Based on the above principles, the purpose of the present invention is to provide a device for generating real-time stereoscopic movies in a personal computer.

Another object of the present invention is to provide a device for generating real-time images with a three-dimensional effect by utilizing animation images generated by graphics accelerators used in personal computers.

To achieve the above-mentioned purpose, the present invention provides a device suitable for producing real-time stereoscopic movies, at least including: a drawing engine, used to provide a synchronization signal, and generate a horizontal offset calculated according to a three-dimensional graphic animation a left-eye image and a right-eye image, wherein the horizontal offset between the left-eye and right-eye images provides an illusion of depth; a memory for storing the left-eye image and the right-eye image; and a a stereoscopic image generator for retrieving the left-eye image and the right-eye image from the memory in response to the synchronous signal, for generating a color-filtered left-eye image partial to a first color and a filtered left-eye image partial to a second color The right-eye image of a color is outputted, wherein the first color and the second color are complementary colors. If a stereo enable signal is set, the stereo image generator is enabled to generate the color-filtered left-eye image and the color-filtered right-eye image.

Wherein the stereoscopic image generator outputs the color-filtered left-eye image and the color-filtered right-eye image in turn according to the synchronous signal; the stereoscopic image generator at least includes: a first multiplexer, responding to a first signal, if the When the first signal is deactivated, it is used to filter out the red components in the left-eye and right-eye images, and if the first signal is set, it is used to allow the red components in the left-eye and right-eye images to pass through ; A second multiplexer, responding to a second signal, if the second signal is deactivated, it is used to filter out the green components in the left-eye and right-eye images, if the second signal is set, It is used to allow the green components in the above-mentioned left-eye and the above-mentioned right-eye images to pass through; and a third multiplexer responds to a third signal, and if the third signal is deactivated, it is used to filter out the above-mentioned left-eye and The blue component in the right-eye image is used to allow the blue components in the left-eye and right-eye images to pass through if the third signal is set.

Another embodiment of the present invention is: wherein the stereoscopic image generator includes at least one adder, which is used to process the above-mentioned color-filtered left-eye image and the above-mentioned color-filtered right-eye image so as to overlap each other to generate a stereoscopic image . The stereoscopic image generator also includes a multiplier for multiplying the left-eye image by a first mask and multiplying the right-eye image by a second mask to generate the color-filtered left-eye image and the above-mentioned Filter the right eye image. The multiplier respectively uses the first mask to block the second color in the left-eye image, and uses the second mask to block the first color in the right-eye image, so as to generate the filter that is partial to the first color. The color-filtered left-eye image and the above-mentioned color-filtered right-eye image partial to the above-mentioned second color. The above-mentioned adder performs the bit-block shift operation used in computer graphics.

In summary, the device of the present invention that is suitable for producing real-time stereoscopic films, its drawing engine provides a synchronous signal, and generates a left-eye image and a right-eye image according to the horizontal offset calculated by the three-dimensional graphic animation, wherein the left eye The above-mentioned horizontal offset between the eye and the right-eye image can provide the illusion of depth, and the above-mentioned left-eye and right-eye images are temporarily stored in memory; the stereoscopic image generator then retrieves the left-eye image from the memory in response to the synchronization signal and the right-eye image to produce a color-filtered left-eye image of the first color and a color-filtered right-eye image of the second color, so that each color-filter image is biased towards one of the two complementary colors; through a three-dimensional When the glasses watch the above-mentioned color-filtered left-eye image and color-filtered right-eye image, the sense of depth of the scene can be produced. The cost of the stereoscopic glasses of the present invention is much lower than the above glasses with liquid crystal shutters, and no external signal is needed for synchronizing the stereoscopic glasses, which greatly simplifies the structure of the device and reduces the cost.

Description of drawings

Fig. 1 is a block diagram according to a preferred embodiment of the present invention;

FIG. 2 is a block diagram illustrating a stereoscopic image generator;

Fig. 3 is a function explanatory diagram of another embodiment of a stereoscopic image generator;

Fig. 4 is a function explanatory diagram of the bit block transfer operation performed by the adder in the stereoscopic image generator;

Fig. 5 is a flowchart of another embodiment described above.

Detailed ways

As shown in FIG. 1 , a graphics display device 10 of a personal computer provides a video signal 132 to a display 20, wherein the graphics display device 10 includes a graphics processor 100, a memory 110, a memory controller 120, and a digital-to-analog converter (DAC) 130, According to the present invention, the graphics processor 100 further includes a 3D graphics engine (engine) 102 and a stereoscopic image generator 104 , both of which can access the memory 110 through the memory controller 120 . For example, the 3D graphics engine 102 receives graphics data and instructions from the central processing unit (CPU) via the PCI or AGP bus 140. In normal operation, the 3D graphics engine 102 can draw ( render) a series of 3D animations (animation), each 3D image in this series of 3D animations is pre-stored in the memory 110 to use the computing power of the 3D graphics engine 102 as much as possible, and the graphics processor 100 continuously fetches Return the pre-stored digital image and send it to the DAC 130. In order to display the transmitted data on the display 20, the DAC 130 converts the digital image into an analog video signal 132. In addition to rendering 3D animation, if the stereo function of the graphics processor 100 is enabled, the 3D graphics engine 102 also calculates a horizontal offset (horizontal offset) for each 3D graphic animation. The graphics engine 102 further provides a synchronization signal 106, and generates a left-eye image 112 and a right-eye image 114 according to the horizontal offset, wherein the horizontal offset between the left-eye and right-eye images can provide the illusion of depth . The left-eye image 112 and the right-eye image 114 are stored in the memory 110 for subsequent processing. Since the left-eye and right-eye images generated from the previous operation are temporarily stored in the memory 110, the 3D graphics engine 102 can be free to perform the next operation. In this way, the resources of the 3D graphics engine 102 can be utilized as much as possible. Because of the reasons described above, the device disclosed in the present invention can achieve the purpose of producing real-time 3D movies.

Continuing to refer to FIG. 1 , the stereoscopic image generator 104 retrieves the left-eye image 112 and the right-eye image 114 from the memory 110 in response to the synchronous signal 106 to generate a color-filtered left-eye image and a color-filtered right-eye image respectively, so that the color-filtered The left eye image is biased towards one color and the filtered right eye image is biased towards another color, where the two colors are complementary colors. The stereoscopic image generator 104 outputs the above-mentioned color-filtered left-eye image and the above-mentioned color-filtered right-eye image to the DAC 130 in turn according to the synchronous signal 106, and converts the digital signal into an analog video signal 132, so that the color-filtered left-eye and right-eye images are displayed On the display 20, the viewer wears the stereoscopic glasses 30 and can watch these color-filtered left-eye and right-eye images through matching colored lenses, the left eye sees the color-filtered left-eye image and the right eye sees the color-filtered right-eye image, thus bringing depth emotional scene.

The preferred embodiment of the stereoscopic image generator 104 in FIG. 2 will become more apparent and comprehensible through the following detailed description. When using a computer to process color images, the image is usually decomposed into three primary colors (primary colors) of red (Red, R), green (Green, G), and blue (Blue, B). The combination of ingredients can produce any other color. In Fig. 2 stereoscopic image generator 104 comprises three multiplexers (multiplexer) 220a, 220b and 220c, each multiplexer filters a kind of color component in image respectively, multiplexer 220a, 220b and 220c have substantially on the same configuration. For example, applying zero value (0) to one input port 222a of the multiplexer 220a, and applying the red component (R) in the image to the other input port 224a of the multiplexer 220a, according to a stereo enable With the signal 210 and a control signal _CR , the output port 226a of the multiplexer 220a provides a filtered image as its red component. Stereo enable signal 210 and control signal _CR are respectively applied to input terminals 232a, 234a of a logic gate 230a (logic gate), as shown in FIG. 2, if stereo enable signal 210 is set (assert), then the stereo The image generator 104 is capable of generating the color-filtered left-eye image and the color-filtered right-eye image.

In one embodiment, when the control signal _CR is de-asserted, the multiplexer 220a filters out the red component in the image for the left eye, and when the control signal _CR is asserted, it is used to allow the right The red component in the eye image passes through; when the control signal C _G is released, the multiplexer 220b filters out the green component in the right eye image, and when the control signal C _G is set, it is used to allow the green component in the left eye image The green component of the pass; similarly, when the control signal C _B is deactivated, the multiplexer 220c filters out the blue component in the right eye image, and when the control signal C _B is set, it is used to allow the left eye image The blue component in the pass. As a result, the stereoscopic image generator 104 respectively generates a bluish-green color-filtered left-eye image and a reddish-color-filtered right-eye image, and then the color-filtered left-eye image and the color-filtered right-eye image are generated at a rate of about 60 images per second Displayed on the display 20, the viewer can wear the stereoscopic glasses 30 to watch these color filtered images through the lenses with matching colors, the viewer can only see the blue-green images with the blue-green lenses, and can only see the partial images with the red lenses. A red image, thereby providing separate images for the left and right eyes.

In another embodiment, when the control signal _CR is deasserted, the multiplexer 220a filters out the red component in the right-eye image, and when the control signal _CR is set, it is used to allow the red component in the left-eye image The red component passes; when the control signal C _G is released, the multiplexer 220b filters out the green component in the left-eye image, and when the control signal C _G is set, it is used to allow the green component in the right-eye image to pass ; Similarly, when the control signal C _B is removed, the multiplexer 220c filters out the blue component in the right eye image, and when the control signal C _B is set, it is used to allow the blue component in the left eye image The ingredients are passed. As a result, the stereoscopic image generator 104 respectively generates a reddish-blue color-filtered left-eye image and a greenish-color-filtered right-eye image, and then the color-filtered left-eye image and the color-filtered right-eye image are processed at a rate of about 60 images per second. The rate is displayed on the display 20, and the viewer can wear the stereoscopic glasses 30 to watch these color-filtered images through the lenses that match the color. The viewer can only see the red and blue images with the red and blue lenses, and can only see them with the green lenses to a greenish image, thus providing separate images for the left and right eyes.

Fig. 3 is a function explanatory diagram of another embodiment of the stereoscopic image generator 104, in order to obtain a stereoscopic image comprising two separate images, wherein the two images are horizontally shifted images of different colors for the same scene, such as As shown in the figure, the stereoscopic image generator 104 may include an adder 320 and a multiplier 310 . Referring to the flowchart in FIG. 5 , another embodiment of the stereoscopic image generator 104 will be more clear with the following detailed description. If the stereo function of the graphics processor 100 is turned off (step S500), as described above, the graphics processor 100 draws a general 3D animation (step S505), and presents it on the display 20 by the DAC 130 (step S515) . If the stereo function of the graphics processor 100 is enabled (step S500), the 3D graphics engine 102 in the graphics processor 100 will calculate a horizontal offset (step S510), and then the 3D graphics engine 102 will draw a left-eye image 112 and a right-eye image 114, wherein according to the aforementioned horizontal offset, with respect to the same scene in the right-eye image 114, some or all of the scenes in the left-eye image 112 are horizontally moved (step S520), and then the stereoscopic image is generated The device 104 uses the multiplier 310 to multiply the left-eye image 112 by the first mask 312 and the right-eye image 114 by the second mask 314 to generate a color-filtered left-eye image 322 and a color-filtered right-eye image 324 (step S530). To generate the stereoscopic image 330 , as shown in FIG. 3 , the adder 320 processes the color-filtered left-eye image 322 and the color-filtered right-eye image 324 to superimpose each other (step S540 ). Then, for both eyes, a stereoscopic image 330 comprising two separate and biased images of different colors is displayed on the display 20 at a rate of approximately 30 images per second. In one embodiment, the multiplier 310 uses the first mask 312 to block the red component in the left-eye image 112 to generate a bluish-green filtered left-eye image 322 , and uses the second mask 314 to block the red component in the right-eye image 114 The blue-green component of the image 324 produces a reddish color-filtered right-eye image. The viewer can wear the 3D glasses 30 to watch the 3D image 330 through the lenses with matching colors. In this way, the viewer can only see the blue-green image with the blue-green lens, and can only see the reddish image with the red lens. In this way, separate images are provided to the left and right eyes at the same time. Since the two images superimposed together in the stereoscopic image 330, the same scene has been moved horizontally, the viewer will feel the illusion of depth. In another embodiment, the multiplier 310 uses the first mask 312 to block the green component in the left-eye image 112 to generate a reddish-blue filtered left-eye image 322 , and uses the second mask 314 to block the right-eye image The red and blue components in 114 are used to generate a greenish filtered right eye image 324 . The viewer can wear the 3D glasses 30 to watch the 3D image 330 through the lenses with matching colors. In this way, the viewer can only see the reddish blue image with the red and blue lenses, and can only see the greenish image with the green lens. In this way, separate images are provided to the left and right eyes at the same time. Because of the two images superimposed together in the stereoscopic image 330, the same scene has been moved horizontally, which will provide the viewer with a sense of depth.

Furthermore, the adder 320 executes a bit-block transfer operation (B _OP ) used in computer graphics technology. As _shown in FIG. The technique of moving or overlaying blocks to the destination image 424 is a more efficient technique of _BOP than moving or overlaying individual bits or groups of bytes.

Based on the above, the present invention discloses a device suitable for generating real-time 3D video. Although the present invention has been disclosed as above with specific embodiments, it is only for the ease of explaining the technical content of the present invention, rather than restricting the present invention to the embodiments in a narrow sense. Within the scope, some changes and modifications can be made, so the protection scope of the present invention should be defined by the claims.

Claims (20)

1. one kind is applicable to the device that produces instant anaglyph, it is characterized in that: comprise at least:

One drawing engine in order to a synchronous signal to be provided, and to calculate a horizontal offset that gets according to a three-dimensional picture animation and produces a left-eye images and a right-eye image, and wherein this horizontal offset between this left eye and this right-eye image can provide the illusion of the degree of depth;

One storer is in order to store this left-eye images and this right-eye image; And

One stereo-picture generator, fetch this left-eye images and this right-eye image in response to this synchronizing signal from this storer, be used as output in order to the colour filter left-eye images that produces inclined to one side one first color and a colour filter right-eye image of inclined to one side one second color, wherein this first color and this second color are complementary colors.

2. the device that produces instant anaglyph that is applicable to as claimed in claim 1, it is characterized in that: above-mentioned stereo-picture generator is exported above-mentioned colour filter left-eye images and above-mentioned colour filter right-eye image in turn according to above-mentioned synchronizing signal.

3. the device that produces instant anaglyph that is applicable to as claimed in claim 2, it is characterized in that: above-mentioned stereo-picture generator comprises at least:

One first multiplexer, in response to one first signal, if this first signal is disengaged, then in order to the red composition in above-mentioned left eye of filtering and the above-mentioned right-eye image, if this first signal is set, then in order to allow that the red composition in above-mentioned left eye and the above-mentioned right-eye image passes through;

One second multiplexer, in response to a secondary signal, if this secondary signal is disengaged, then in order to the green composition in above-mentioned left eye of filtering and the above-mentioned right-eye image, if this secondary signal is set, then in order to allow that the green composition in above-mentioned left eye and the above-mentioned right-eye image passes through; And

One the 3rd multiplexer, in response to one the 3rd signal, if the 3rd signal is disengaged, then in order to the blue composition in above-mentioned left eye of filtering and the above-mentioned right-eye image, if the 3rd signal is set, then in order to allow that the blue composition in above-mentioned left eye and the above-mentioned right-eye image passes through.

4. the device that produces instant anaglyph that is applicable to as claimed in claim 3 is characterized in that: above-mentioned first color is a blue-green and above-mentioned second color is a redness.

5. the device that produces instant anaglyph that is applicable to as claimed in claim 4, it is characterized in that: by removing above-mentioned first signal, red composition in the above-mentioned left-eye images of the above-mentioned first multiplexer filtering, by setting above-mentioned second and above-mentioned the 3rd signal, above-mentioned second and above-mentioned the 3rd multiplexer allow that respectively green the and blue composition in the above-mentioned left-eye images passes through, to produce glaucous partially above-mentioned colour filter left-eye images.

6. the device that produces instant anaglyph that is applicable to as claimed in claim 4, it is characterized in that: by setting above-mentioned first signal, above-mentioned first multiplexer allows that the red composition in the above-mentioned right-eye image passes through, by removing above-mentioned second and above-mentioned the 3rd signal, above-mentioned second and above-mentioned the 3rd the multiplexer green and blue composition in the above-mentioned right-eye image of filtering respectively, to produce the above-mentioned colour filter right-eye image of inclined to one side redness.

7. the device that produces instant anaglyph that is applicable to as claimed in claim 4, it is characterized in that: the above-mentioned colour filter left-eye images and the above-mentioned colour filter right-eye image that are taken turns output according to above-mentioned synchronizing signal by above-mentioned stereo-picture generator can be that a blue-green eyeglass and another are that glasses of a red eyeglass are watched to produce depth perception by having a glance.

8. the device that produces instant anaglyph that is applicable to as claimed in claim 3 is characterized in that: above-mentioned first color is a reddish blue and above-mentioned second color is a green.

9. the device that produces instant anaglyph that is applicable to as claimed in claim 8, it is characterized in that: by removing above-mentioned secondary signal, green composition in the above-mentioned left-eye images of the above-mentioned second multiplexer filtering, by setting above-mentioned first and above-mentioned the 3rd signal, above-mentioned first and above-mentioned the 3rd multiplexer allow that respectively red the and blue composition in the above-mentioned left-eye images passes through, to produce the above-mentioned colour filter left-eye images of inclined to one side reddish blue.

10. the device that produces instant anaglyph that is applicable to as claimed in claim 8, it is characterized in that: by setting above-mentioned secondary signal, above-mentioned second multiplexer allows that the green composition in the above-mentioned right-eye image passes through, by removing above-mentioned first and above-mentioned the 3rd signal, above-mentioned first and above-mentioned the 3rd the multiplexer red and blue composition in the above-mentioned right-eye image of filtering respectively, to produce the above-mentioned colour filter right-eye image of inclined to one side green.

11. the device that produces instant anaglyph that is applicable to as claimed in claim 8, it is characterized in that: the above-mentioned colour filter left-eye images and the above-mentioned colour filter right-eye image that are taken turns output according to above-mentioned synchronizing signal by above-mentioned stereo-picture generator can be that a reddish blue eyeglass and another are that glasses of a green len are watched to produce depth perception by having a glance.

12. the device that produces instant anaglyph that is applicable to as claimed in claim 1, it is characterized in that: above-mentioned stereo-picture generator comprises a totalizer at least, be used for handling above-mentioned colour filter left-eye images with above-mentioned colour filter right-eye image so that each other double exposure be in the same place, and produce a stereopsis.

13. the device that produces instant anaglyph that is applicable to as claimed in claim 12, it is characterized in that: above-mentioned stereo-picture generator more comprises a multiplier, be used for above-mentioned left-eye images is multiplied by one first shade and above-mentioned right-eye image is multiplied by one second shade, and produce above-mentioned colour filter left-eye images and above-mentioned colour filter right-eye image respectively.

14. the device that produces instant anaglyph that is applicable to as claimed in claim 13, it is characterized in that: above-mentioned multiplier stops above-mentioned second color in the above-mentioned left-eye images with above-mentioned first shade respectively, stop above-mentioned first color in the above-mentioned right-eye image with above-mentioned second shade, and produce the above-mentioned colour filter right-eye image of stating the above-mentioned colour filter left-eye images of first color on the upper side and stating second color on the upper side.

15. the device that produces instant anaglyph that is applicable to as claimed in claim 12, it is characterized in that: above-mentioned totalizer is carried out employed bit block branching operation in the computer graphic technology.

16. the device that produces instant anaglyph that is applicable to as claimed in claim 14 is characterized in that: above-mentioned first color is a blue-green and above-mentioned second color is a redness.

17. the device that produces instant anaglyph that is applicable to as claimed in claim 16 is characterized in that: above-mentioned stereopsis can be that a blue-green eyeglass and another are that glasses of a red eyeglass are watched to produce depth perception by having a glance.

18. the device that produces instant anaglyph that is applicable to as claimed in claim 14 is characterized in that: above-mentioned first color is a reddish blue and above-mentioned second color is a green.

19. the device that produces instant anaglyph that is applicable to as claimed in claim 18 is characterized in that: above-mentioned stereopsis can be that a reddish blue eyeglass and another are that glasses of a green len are watched to produce depth perception by having a glance.

20. the device that produces instant anaglyph that is applicable to as claimed in claim 1 is characterized in that: if a three-dimensional enable signal is set, then make above-mentioned stereo-picture generator can produce above-mentioned colour filter left-eye images and above-mentioned colour filter right-eye image.

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