WO2010124542A1 - Procédé et dispositif de traitement d'image pour système d'affichage à raccord sans discontinuité - Google Patents

Procédé et dispositif de traitement d'image pour système d'affichage à raccord sans discontinuité Download PDF

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Publication number
WO2010124542A1
WO2010124542A1 PCT/CN2010/071155 CN2010071155W WO2010124542A1 WO 2010124542 A1 WO2010124542 A1 WO 2010124542A1 CN 2010071155 W CN2010071155 W CN 2010071155W WO 2010124542 A1 WO2010124542 A1 WO 2010124542A1
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WIPO (PCT)
Prior art keywords
image
display
splicing
data
module
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PCT/CN2010/071155
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English (en)
Chinese (zh)
Inventor
卢如西
孟凡华
Original Assignee
广东威创视讯科技股份有限公司
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Priority claimed from CN 200910039102 external-priority patent/CN101556425B/zh
Priority claimed from CN2009100415634A external-priority patent/CN101644876B/zh
Priority claimed from CN2009101926529A external-priority patent/CN101692335B/zh
Application filed by 广东威创视讯科技股份有限公司 filed Critical 广东威创视讯科技股份有限公司
Publication of WO2010124542A1 publication Critical patent/WO2010124542A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3147—Multi-projection systems

Definitions

  • the present invention relates to the field of display screen image processing, and more particularly to an image processing method and apparatus for realizing splicing large screen display.
  • the existing large-screen display technology mainly combines and displays a plurality of display units by stacking.
  • the advantage of splicing a large screen is that it can improve the resolution of the display system, increase the display area, display a complete picture on the entire display screen, or open a window at any position on the display screen, but at the same time, it has its shortcomings. That is, there is a clear physical joint at the joint of each display unit, which is reflected as a black line when the display is actually activated, which destroys the overall effect of the image.
  • Chinese patent CN1688160A discloses an image edge fusion method for splicing display on a large screen, which divides a picture into a plurality of sub-images, each adjacent sub-image connection edge portion has the same image content, and the same image is projected when the image is projected
  • the edges of the content are partially overlapped, and the overlapping regions are brightness-homogenized using optical (physical) modulation and electronic gain adjustment.
  • optical (physical) modulation and electronic gain adjustment By adopting the overlapping projection of the same image of adjacent sub-images, it is easy to cause partial pixels to be accurately overlapped at the joint seam to form a ghost image.
  • Electronically adjusting the pixel position causes the image to be warped, and there is still a bright and dark difference in the large angle of view of the overlapping areas of the image, and the stitching marks are obvious.
  • the entire splicing display system is composed of a plurality of display units 11 , and a splicing seam 12 exists between two adjacent display units, and the splicing seam may be an actual physical gap or a screen.
  • the connecting materials are spaced apart.
  • each display unit 11 is sequentially arranged by the projector 21 and the screen system 22 in accordance with the optical path.
  • a mirror is also installed between the projector 21 and the screen system 22 in many cases. slightly.
  • the screen system 22 mainly includes a fixed bracket 23, a Fresnel lens 24, and a rear projection screen 25; wherein the rear projection screen 25 can correspond to the screen system 22, that is, only one Fresnel lens 24 is covered, or a large one can be made
  • the screen shared by multiple display units, covers a plurality of Fresnel lenses.
  • the projected light 26 emitted by the projector 21 passes through the Fresnel lens 24 and is refracted by the Fresnel lens 24, and then vertically projected to the rear projection screen 25, which is pressed by the rear projection screen 25.
  • a reasonable angular distribution is emitted from the front side of the rear projection screen 25.
  • the range of projected light 26 coincides with the area of the rear projection screen corresponding to a screen system. Due to the need for mounting and the adjustment of the position of the screen system 22, there is always a certain seam 12 between the two screen systems. Since no projection light reaches the splicing seam 12, a black line is formed at the splicing seam 12 on the spliced image, resulting in image segmentation.
  • the object of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide an image processing method and apparatus for large-screen display without pixel loss and real seamless stitching.
  • An image processing apparatus for seamlessly splicing a large screen display which includes an access module, a storage module, an image segmentation processing module, an image brightness adjustment module, an output module, and a display module that are sequentially connected.
  • the image segmentation processing module functions to divide an image accessed from the graphics card into a plurality of image blocks, and then add a slot image to the connecting edge portion of each adjacent image block, and the formed image is a sub-image.
  • the slit image is an image in which the edge portion of each image block after copying is copied.
  • the slit image may have a width of 1 to 3 pixels, preferably 1 pixel width.
  • the number of output circuits in the output module is the same as the number of divided image blocks, and each sub-image is displayed by a corresponding one of the display units.
  • each sub-image is displayed by a corresponding one of the display units.
  • the display module is composed of a plurality of splicing display units, wherein there are splicing seams between two adjacent display units, and each display unit is sequentially arranged by the projector and the screen system according to the optical path, and the screen system comprises a fixed bracket, Fresnel The lens, the rear projection screen, and the Fresnel lenses of two adjacent screen systems are spliced together, the range of light projected by the projector exceeds the range of the image displayed on the rear projection screen, and the excess light is projected to the side of the screen system; The range of light projected by the projector exceeds the range of the image displayed by the rear projection screen, preferably within one pixel or one pixel.
  • a guiding optical structure is provided in each of the display units, and the guiding optical structure functions to direct light having a projected image light range slightly exceeding the range of the display unit into a gap between the adjacent display units.
  • the image range beyond the display unit is preferably one pixel.
  • the guiding optical structure can be implemented:
  • the guiding optical structure can be a scattered optical structure or a refractive optical structure disposed on the side of the screen system.
  • the optical structure is a groove provided on the edge of the Fresnel lens, the groove surface is a smooth surface or a frosted surface; the opening of the groove is directed to the outside, the groove is close to the inclined surface of the screen and the front surface of the Fresnel lens The angle is larger than the angle of the edge light of the image displayed on the front of the screen, and the angle between the inclined surface of the groove away from the screen and the front surface of the Fresnel lens is less than or equal to 60°.
  • the screen system further includes a glass plate disposed between the Fresnel lens and the fixed bracket; the optical structure is provided with a chamfered surface on a side where the Fresnel lenses are spliced to each other, and a chamfered surface of the Fresnel lens is disposed at
  • the Fresnel lens is close to the side of the projector, and its depth is smaller than that of the edge of the screen system.
  • the corresponding light of the edge of the image is reflected and propagated in the Fresnel lens, so as not to affect the edge of the screen system.
  • the internal refraction and propagation of the Neel lens is appropriate.
  • the cutting surface of the chamfer is a plane or a curved surface.
  • the optical structure is a chamfer provided on an edge edge of a surface where the Fresnel lens and the glass plate are in contact, or a scattering layer or a light transmissive microstructure layer disposed on a side of the glass plate;
  • the cutting surface is a smooth surface or a frosted surface.
  • the angle between the cutting surface of the Fresnel lens and the front surface of the Fresnel lens is larger than the angle of the edge of the image displayed on the front of the screen, and the cutting surface of the glass plate is opposite to Fresnel.
  • the angle between the front side of the lens is less than or equal to 60°.
  • the optical structure may be a scattering layer or a scattering sheet or a light transmissive microstructure layer disposed on a side of the Fresnel lens
  • the light projected into the splicing seam is suitably scattered to match the light emerging from the front of the screen.
  • the optical structure may also be provided with a light transmissive sheet that directs light to propagate toward the front of the screen system, the sheet directing light entering the seam to exit from the front of the screen system.
  • the diffuser or light transmissive sheet may be a fixed connection portion of the screen system.
  • the light transmissive microstructure layer is preferably parallel to the stepped microprism layer on the front side of the Fresnel lens, and the microsphere missing layer and the micro cone layer may be arranged in an ordered manner.
  • the screen system also includes a light transmissive plate disposed inside the Fresnel lens.
  • the optical structure may also be a refracting wedge disposed near the fixed bracket at a position where the screen system is in contact with the fixed bracket; at this time, the fixing bracket may be a light-transmitting fixing bracket, or the end that is in contact with the screen system is transparent. Fix the bracket.
  • the working principle of the scheme is as follows: On the basis of the existing rear projection display unit, firstly, the range of light projected by the projector is slightly enlarged, slightly exceeding the range of the image displayed on the rear projection screen (the amount exceeds one pixel), beyond Part of the light is projected to the side of the screen system. And a specific optical structure is disposed on the side of the screen system, so that the light projected to the side of the screen system passes through the optical structures, and then exits to the splicing gap at a certain angle, and then exits from the front surface of the rear projection screen.
  • the invention also provides an image processing method for realizing seamless splicing large screen display, comprising the following steps:
  • the image segmentation processing module reads the image data in the storage module, divides the image into a plurality of image blocks, and adds a gap image to the connecting edge portion of each adjacent image block, and the formed image is a sub-image, wherein The slit image is the same as the image of the edge portion of each image block after the segmentation;
  • the image brightness adjustment module adjusts the brightness of the slit image in each sub-image, so that the brightness of each adjacent sub-image is smoothly transitioned at the slit;
  • the sub-image data is transmitted to the corresponding display unit for display through the output module.
  • the access module can input image data for one or more access circuits.
  • the memory module can be stored by using a built-in memory module to store image data or an external memory to store image data.
  • the image data can be copied by means of delayed reading, or the image data can be copied by repeatedly reading the same storage address data.
  • the specific process of image segmentation and the addition of the slot image in the step (2) may be: the image segmentation processing module reads the image data in the storage module. At the same time, the pixels read in each row are counted. After reading the Nth pixel of each row, the data is read by the first delay circuit formed by the D flip-flop in the image segmentation processing module. The time is the length of time for reading A pixels, so that the N-A+1th pixel to the Nth pixel read from each line is equivalent to re-reading once. After reading the N+2A pixels of each row (ie, the N+A pixels of the DVI output), the second delay formed by the D flip-flop is performed on the basis of the original first delay circuit.
  • the circuit reads the data, wherein the delay time is also the length of time for reading A pixels, which is equivalent to reading the N+A+1 to N+2A pixels read again, and so on. , you can complete image segmentation and add gap images to each image block.
  • N is the number of pixels per line of the divided image block, which is set by the user according to actual needs;
  • A is the pixel width of the slit image The number may be 1 or 2 or 3, preferably 1.
  • the specific process of image segmentation and the addition of the slot image in the step (2) may be: reading data generated by the image segmentation processing module The address, the data is read, and the pixel data read in each row is counted, and when the edge pixels of the divided image block (that is, the pixels spliced between the image blocks) are counted, the edge pixels are repeatedly read. Repeat reading only at the edge pixels of the stitching, and other pixels can be read directly. The above operation is repeated for each line of data, image segmentation is completed, and a slit image is added to each image block.
  • the access circuit in the vertical direction It is separate, that is, any display unit in the vertical direction does not share the same access circuit.
  • the storage module can store the image data or the external memory to store the image data by using the built-in memory module.
  • the image data can be copied by means of delayed reading, or the image data can be copied by repeatedly reading the same storage address data.
  • the specific process of image segmentation and the addition of the slot image may be: by the first row of display units in the horizontal direction.
  • the three primary color data is written into the storage module, the image segmentation processing module reads the image data in the memory, and the image segmentation processing module counts the pixels read per line and the number of written lines.
  • the data is read by a first delay circuit composed of a D flip-flop in the image segmentation processing module, wherein the delay time is the time for reading A pixels.
  • the length, such that the N-A+1th pixel to the Nth pixel read from each line is equivalent to re-reading once.
  • the second delay formed by the D flip-flop is performed on the basis of the original first delay circuit.
  • the circuit reads the data, wherein the delay time is also the length of time for reading A pixels, which is equivalent to reading the N+A+1 to N+2A pixels read again, and so on. , it is possible to add a gap image between the desired divided image blocks in the first row of ice squares.
  • N is the number of pixels per line of the divided image block, which is set by the user according to actual needs
  • A is the number of pixel widths of the slit image, which may be 1 or 2 or 3, preferably 1.
  • the same edge row is repeatedly read by the delay circuit.
  • the corresponding image data is written into the memory through the access circuit of the second row display unit in the horizontal direction, similar to the data reading mode of the first row display unit image block in the horizontal direction, and the second row display in the horizontal direction of the read memory is read.
  • the delay reading circuit realizes the repeated reading of the edge line pixels at the junction of the image block of the first row of display unit blocks and the image block of the second row of the display unit image blocks. Repeat reading of the edge pixels at the position, and repeated reading of the edge pixels at the junction of the image block of the third row display unit image block in the second row. As such, all image segmentation is done and a gap image is added to each image block.
  • the specific process of image segmentation and the addition of the slot image in the step (2) may be: writing data generated internally by the image segmentation processing module Address, writes the three primary colors into the memory through each corresponding access circuit, through the image segmentation The read data address generated inside the module, the data is read, and the pixel data and the number of rows read in each row are counted, and when the edge pixels at the splicing position between the divided image blocks are counted, the edge pixels are repeatedly read. .
  • all image segmentation is completed and a slit image is added to each image block.
  • the resolution of the sub-image matches the resolution supported by the display unit.
  • the method for adjusting the brightness of the image includes an average value method, a weighted smoothing method, a gamma curve adjustment method, and the like.
  • the step (4) includes: counting the number of output pixels after the brightness adjustment, and transmitting the number of output pixels to the corresponding display unit for display, and the gap image of each adjacent sub-image is guided to the adjacent display unit through the guiding optical structure. In the gap, the dark line formed by the display unit splicing gap is brightened.
  • the present invention has the following advantages:
  • the present invention prevents the loss of image pixels by adding a slit image at the edge of the divided image block.
  • the present invention can make the projection light reach the splicing gap where the light does not arrive, thereby blanking the splicing.
  • the dark line at the gap achieves the effect of visually effectively splicing the spliced image dividing line, realizing seamless splicing to completely reproduce the image, making the image transition between the splicing display units more natural and smooth, and the overall display effect is better.
  • the optical structure provided by the invention can be in various forms, has a simple structure, is good in process feasibility, and has low cost increase, and is advantageous for popularization and application.
  • the spliced display screen provided by the invention can use a rear projection screen separately for one rear projection unit, or a rear projection screen can be shared by a plurality of rear projection units, and the latter can better embody the advantages of the invention.
  • FIG. 1 is a schematic structural view of a conventional splicing display system
  • FIG. 2 is a schematic structural view of a single rear projection unit in the prior art
  • FIG. 3 is a schematic structural view of an image processing apparatus of the present invention.
  • FIG. 4 is a schematic flow chart of an image processing method of the present invention.
  • FIG. 5 is a schematic structural diagram of hardware according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a sub-image according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic structural diagram of hardware according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic diagram of a sub-image according to Embodiment 2 of the present invention.
  • Figure 9 is a schematic illustration of a first optical structure of the present invention.
  • Figure 10 is a schematic illustration of a second optical structure of the present invention.
  • Figure 11 is a schematic illustration of a third optical structure of the present invention.
  • Figure 12 is a schematic illustration of a fourth optical structure of the present invention.
  • Figure 13 is a schematic illustration of a fifth optical structure of the present invention.
  • Figure 14 is a schematic view showing a screen splicing structure using the first optical structure
  • Figure 15 is a schematic view showing a screen splicing structure using a second optical structure
  • Figure 16 is a schematic view showing a screen splicing structure using a third optical structure
  • Figure 17 is a schematic view showing a screen splicing structure using a fourth optical structure; 18 to 22 are schematic views of a fifth optical structure equivalent conversion application. ⁇ detailed description ⁇
  • the large-screen display device for seamlessly splicing includes an access module, a storage module, an image segmentation processing module, an image brightness adjustment module, an output module, and a display module that are sequentially connected.
  • the splicing large screen is a splicing method composed of two display units in the horizontal direction, and one image access circuit is used for image data input, and two output circuits are used for image data output.
  • a hardware structure diagram for implementing seamless splicing and large screen display is provided in the embodiment, which includes an access module (one access circuit), a storage module, an image segmentation processing module, and an image brightness adjustment module.
  • Output module output circuit A, output circuit B
  • display module display unit A, display unit B.
  • the functions of the memory module, the image segmentation processing module, and the image brightness adjustment module can be implemented by using an FPGA (Field Programmable Gate Array).
  • FPGA Field Programmable Gate Array
  • the storage module can be a dual-chain SRAM (Static Random Access Memory) directly disposed inside the FPGA; or can be implemented by using an FPGA and an external memory.
  • the size of the double-chain SRAM or the external memory set in the FPGA can be set according to the actual needs of the user.
  • the dual-chain SRAM is set internally by the FPGA, and the storage amount is about one line of image data size.
  • the image segmentation processing module is configured to divide an image accessed from the graphics card into thousands of image blocks, and add a gap image to the joint edge portion of each adjacent image block, and the formed image is a sub-image.
  • the slit image is an image of the edge portion of each image block after the splitting, and the slit image may have a width of 1 to 3 pixels. In this embodiment, one pixel width is preferred.
  • a process for implementing an image processing method for seamlessly splicing a large screen display includes the following steps:
  • the graphics card outputs image data
  • the image segmentation processing module reads the image data in the double-chain SRAM, divides the image into several image blocks, and adds a gap image to the joint edge portion of each adjacent image block, and the formed image is a sub-image, wherein , the gap image and the image of the edge portion of each image block after the division are the same;
  • the image brightness adjustment module adjusts the brightness of the slit image in each sub-image, so that the brightness of each adjacent sub-image is smoothly transitioned at the slit;
  • the sub-image data is transmitted to the corresponding display unit for display through the output module.
  • the image data in the step (1) is a 24-bit true color picture, and the image resolution is 2046 x 768.
  • the access interface bandwidth of the access circuit satisfies the image data transmission. The required bandwidth.
  • the image segmentation in the step (3) is performed by dividing an image with a resolution of 2046 x 768 into image blocks A of 1023 768 and image blocks B of 1023 768, and splicing in image block A and image block B. At the edges, gap images of the respective image blocks are added.
  • the slit image width is one pixel width. As shown in FIG. 6, the slit image 401 of the image block A and the slit image 402 of the image block B.
  • the slit image 401 is the same as the image 403 of one pixel width of the most edge column of the image block A, and the slit image 402 is the same as the image 404 of one pixel width of the most edge column of the image block B.
  • two sub-images, sub-image A of 1024 768, and sub-image sub-image A and sub-image B of 1024 768 are formed to match the resolution supported by the display unit.
  • Sub-image formation in step (3) is achieved in one of two ways:
  • Method 1 The image data is copied by using a delayed reading method to form a sub-image.
  • the specific process of image segmentation and the addition of the slot image may be: writing 24 bits of R, G, and B primary color data into the double-chain SRAM under the action of the write clock pulse, and simultaneously Under the action of the read clock pulse, the image segmentation module reads the data and counts the number of pixels read per line. After reading the 1023th pixel of each line, it is composed of a D flip-flop.
  • the first delay circuit reads the output data of the graphics card, wherein the delay time is the length of time for reading one pixel, so that the first 1024 pixels of each line output from the graphics card are delayed by one pixel.
  • the time is read, and the 1024th pixel read is the same as the 1023th pixel read previously.
  • the second delay circuit pair D formed by the D flip-flop is formed on the basis of the original first delay circuit.
  • the VI output data is read, and the delay time is also the length of time for reading one pixel, which is equivalent to reading the 1025th pixel again.
  • Method 2 copying the image data by repeatedly reading the same storage address data.
  • the specific process of image segmentation and the addition of the slot image may be: according to the write data address generated inside the FPGA, The access module writes the three primary color data into the double-chain SRAM, reads the data through the read data address generated by the FPGA, and counts the pixel data read in each row, and counts the edge pixels of the divided image block.
  • the 1023th pixel is repeatedly read once.
  • Read the 1025th pixel that is, the 1024th pixel of the graphics card output
  • read the 1025th pixel repeatedly Repeat reading only at the edge of the stitching edge, and other pixels can be read directly.
  • the aperture image A and the slit image B are subjected to brightness adjustment by the image brightness adjustment module.
  • the main adjustment methods including the average method, the weighted smoothing method, the gamma curve adjustment method, etc., can be selected by the user himself.
  • the weighted smoothing method is adopted, that is, the luminance value of the slot image A is multiplied by L1 by a weight al, and the luminance value M1 of the aperture image A is obtained, wherein the weight al is a constant of 0 to 1.
  • the luminance value of the slit image B is multiplied by L2 by a weight a2 to obtain a luminance value M2 after the aperture image B is adjusted, wherein the weight a2 is a constant of 0 to 1.
  • the adjacent sub-image A and the sub-image B achieve a smooth transition in brightness at the slit.
  • the specific formula is as follows:
  • the FPGA counts the pixels read in each line, and reads the image data under the read clock pulse.
  • the first 1024 pixels of each line of the output image data are sent to the display unit A; the 1025th pixel to the last 2048th pixel of each line of the output image data are sent to the display unit B.
  • the sub-image A is realized to be displayed on the display unit A through the output circuit A.
  • the slit images of the sub-image A and the sub-image B are each guided through a guiding optical structure into a gap between the adjacent display unit A and the display unit B.
  • the splicing large screen is a splicing mode composed of 2 x 2 display units.
  • the display unit uses one access circuit A to connect the graphics card A for image input, and the two display units in the second row in the horizontal direction use one access circuit B to connect the graphics card B for image input.
  • one graphics card corresponds to one row of display units, and each graphics card output image is processed by an FPGA and a 15 external memory, and the two FPGAs are connected by a synchronization signal to ensure that the upper and lower rows of display units are displayed synchronously.
  • the size of the external memory is two sizes of image data.
  • FIG. 7 A schematic diagram of the hardware circuit structure of this embodiment is shown in FIG. 7.
  • a process for implementing an image processing method for seamlessly splicing a large screen display, and outputting an image of 20 images from each graphics card includes the following steps:
  • the graphics card outputs image data
  • the image segmentation processing module reads the image data in the external memory, divides the image into thousands of image blocks, and adds a gap image to the joint edge portion of each adjacent image block, and the formed image is a sub-image, wherein , the slit 25 gap image and the image of the edge portion of each image block after the division are the same;
  • the image brightness adjustment module adjusts the brightness of the slit image in each sub-image, so that the brightness of each adjacent sub-image is smoothly transitioned at the slit;
  • the sub-image data is transmitted to the corresponding display unit for display through the output module.
  • the image data in the step (1) is a 24-bit true color image, and the image resolution is 2046.
  • step (2) the access interface bandwidth of the access circuit satisfies the bandwidth required for image data transmission.
  • the image segmentation in the step (3) is performed by dividing an image with a resolution of 2046 1534 into image blocks A of 1023 767, image blocks B of 1023 767, image blocks C of 1023 767 767, and 1023 ⁇ 767.
  • the slit images of the respective image blocks are respectively added.
  • the slit image width is one pixel width.
  • the image block A is added with the slit images 601, 602. image
  • 35 blocks B are added with slit images 603, 604.
  • the image block C is added with slit images 605, 606.
  • the image block D is added with slit images 607, 608.
  • the gap image 601 and a pixel width map of the most edge of the image block A The same as 609; 602 is the same as the image 610 of one pixel width of the most edge of the image block A; the slit image 603 is the same as the image 611 of one pixel width of the most edge of the image block B; the image of the slit image 604 and the image block B
  • the image 612 of one pixel width of the most edge line is the same; the image 613 of one pixel width of the most edge column of the image block C is the same; the image 614 of one pixel width of the edge image 606 and the most edge of the image block C
  • the slit image 607 is the same as the image 615 of one pixel width of the most edge column of the image block D; the slit image 60
  • a patch image is formed, which is a sub-image A of 1024 768, a sub-image 1024 of 1024 768, a sub-image C of 1024 768, and a sub-image D of 1024 768.
  • the resolution of the sub-images is consistent with the resolution supported by the display unit.
  • Sub-image formation in step (3) is achieved in one of two ways:
  • Method 1 Copying image data by means of delayed reading.
  • the specific process of image segmentation and slot image addition may be: at the beginning of each line, through the first row in the horizontal direction
  • the access circuit A corresponding to the display unit writes the three primary color data into the external memory, and the image segmentation processing module in the FPGA reads the image data in the external memory, and the image segmentation processing module reads the pixels in each row and the number of rows written.
  • the length of time of the pixel, so that the 1023th pixel read from each line is equivalent to re-reading it again.
  • the second delay circuit composed of the D flip-flop pair is used on the basis of the original first delay circuit.
  • Read where the delay time is also the length of time to read 1 pixel, which is equivalent to reading the 1025th pixel read again, and so on, can add the first row in the horizontal direction It is necessary to divide the gap image between the image blocks.
  • the entire 767 lines are repeatedly read by the delay circuit.
  • the corresponding image data is written into the corresponding memory by the access circuit B corresponding to the second row display unit in the horizontal direction, similar to the data reading mode of the first row display unit image block in the horizontal direction, and the level in the memory is read.
  • the delay pixel is used to realize the repeated reading of the edge pixels at the junction between the image blocks of the second row display unit and the first row of pixels of the image block of the second row display unit. (ie, the repeated reading of the edge row pixels in the second row of display unit image blocks that are connected to the first row of display unit image blocks). In the above manner, all image segmentation is completed and a slit image is added to each image block.
  • Method 2 copying the image data by repeatedly reading the same storage address data.
  • the specific process of image segmentation and the addition of the slot image may be: according to the write data address generated inside the image processing circuit
  • the three primary color data is written into the external memory through the access circuit A, and the data is read by the read data address generated inside the image processing circuit, and the pixel data and the number of rows read per line are counted, and each row is counted.
  • the 1023th pixel is read, the 1023th pixel is repeatedly read once.
  • the 1025th pixel is counted, the 1025th pixel is repeatedly read once.
  • the count reaches the 767th line, the 767th line is repeatedly read once.
  • the three primary colors are written into the corresponding external memory through the access circuit B, and the data is read by the read data address generated inside the image processing circuit, and the pixel data and the number of rows read per line are counted,
  • the line counts to the 1023th pixel read the 1023th pixel is repeatedly read. Take it once.
  • the 1025th pixel is counted, the 1025th pixel is repeatedly read once.
  • the first line of image data is read, the first line is repeatedly read once. In the above manner, all image segmentation is completed and a slit image is added to each image block.
  • the brightness adjustment of this embodiment is the same as that of the first embodiment.
  • the FPGA counts the pixels read in each row, and under the read clock pulse, the image data of the sub-image is transmitted to the corresponding display unit through the corresponding output circuit for display.
  • the slit images of the sub-image A, the sub-image B, the sub-image C, and the sub-image D are both guided by an optical structure and guided into a gap with an adjacent display unit.
  • the display module in the embodiment is composed of a plurality of spliced display units, each of which is provided with a guiding optical structure, and the guiding optical structure functions to direct the image light range slightly beyond the display unit range, and guide the excess light to In the gap between adjacent display units.
  • the optical structure used in this embodiment is shown in FIG. 9.
  • the overall splicing structure is as shown in FIG. 14.
  • the whole splicing display system is mainly composed of a plurality of rear projection units 11 spliced together, and a splicing exists between two adjacent rear projection units. Slot 12.
  • Each of the rear projection units 11 is configured by the projector 21 and the screen system 22 in order according to the optical path.
  • the screen system 22 is mainly composed of a fixed bracket 23, a Fresnel lens 3 1, and a rear projection screen 25.
  • the Fresnel lens 31 is formed with a groove 32.
  • the surface of the groove 32 may be a smooth surface or a frosted surface.
  • the opening of the groove 32 is directed to the outside, and the groove is close to the inclined surface of the screen and the front surface of the Fresnel lens.
  • the angle is larger than the angle of the edge of the image displayed on the front of the screen.
  • the angle between the inclined surface of the groove away from the screen and the front surface of the Fresnel lens is less than or equal to 60°.
  • the depth of the groove is not directly blocked from the projector and projected onto the screen. Light is appropriate.
  • the range of the light 26 projected by the projector 21 of the present embodiment is slightly enlarged relative to the prior art, slightly exceeding the range of the image displayed by the rear projection screen 25, and the excess light is projected onto the side of the Fresnel lens 31;
  • the groove 32 is formed at the side of the Fresnel lens 31, so that the excess light is projected onto the groove 32.
  • the light 26 projected onto the groove 32 is refracted by the smooth surface of the groove 32 (or scattered by the sand surface), exits to the splicing slit 12, and finally exits from the front of the screen system.
  • the ray 26 of the present embodiment exceeds the value of the image range displayed by the rear projection screen 25, preferably within one pixel or one pixel.
  • the value exceeded is within the above range, and the pixels of the image are not lost while blanking the dark line.
  • the optical structure used in this embodiment is shown in FIG. 10
  • the overall splicing structure is as shown in FIG. 15 .
  • the entire splicing display system is mainly composed of a plurality of rear projection units 11 and a splicing between two adjacent rear projection units. Slot 12.
  • Each of the rear projection units 11 is configured by the projector 21 and the screen system 22 in order according to the optical path.
  • the screen system 22 is mainly composed of a fixed bracket 23, a Fresnel lens 41, a glass plate 42, and a rear projection screen 25, wherein the glass plate 42 is mounted between the Fresnel lens 41 and the fixed bracket 23.
  • the edge edges of the face where the Fresnel lens 41 is in contact with the glass plate 42 are respectively provided with a chamfered corner 43 and a chamfered corner 44, which constitute the optical structure of this embodiment.
  • the angle between the cutting face of the chamfer 43 on the Fresnel lens and the front face of the Fresnel lens is larger than the angle of the corresponding edge light of the image displayed on the front of the screen, on the glass plate
  • the angle between the cutting face of the chamfer 44 and the front side of the Fresnel lens is less than or equal to 60°.
  • the surfaces of the chamfer 43 and the chamfer 44 may each be a smooth surface or a matte surface.
  • the range of the light 26 projected by the projector 21 of the present embodiment is expanded relative to the prior art, slightly exceeding the range of the image displayed by the rear projection screen 25, and the excess light is projected onto the side of the screen system;
  • the side of the screen system is provided with a chamfer 44 and a chamfer 43 so that the excess light is actually projected onto the chamfer 44.
  • the light 26 projected at the chamfer 44 on the glass plate is refracted by the chamfered smooth surface (or scattered by the frosted surface), and then exited to the splicing slit 12 along the outside of the chamfered corner 43 of the Fresnel lens, and finally exits from the front of the screen system. .
  • light arrives at the splicing slit 12 where no light has arrived, thereby blanking the dark line at the splicing slit 12, thereby achieving the effect of visually effectively blanking the spliced image dividing line.
  • the light 26 of the present embodiment exceeds the value of the image range displayed by the rear projection screen 25, which is the same as the embodiment of an optical structure, and is not described herein.
  • the optical structure used in this embodiment is shown in FIG. 11.
  • the overall splicing structure is as shown in FIG. 16.
  • the whole splicing display system is mainly composed of a plurality of rear projection units 11 and spliced together, and there are two adjacent rear projection units.
  • Each of the rear projection units 11 is configured by the projector 21 and the screen system 22 in order according to the optical path.
  • the screen system 22 is mainly composed of a fixed bracket 23, a Fresnel lens 24, and a rear projection screen 25.
  • a scattering layer 5 1 or a light transmissive microstructure layer 52 is formed on the side of the Fresnel lens 24.
  • the range of the light 26 projected by the projector 21 of the present embodiment is expanded relative to the prior art, slightly exceeding the range of the image displayed by the rear projection screen 25, and the excess light is projected onto the side of the screen system; the fork is in this embodiment.
  • the side of the Fresnel lens 24 of the screen system is provided with a scattering layer 51 or a light transmissive microstructure layer 52, so that the excess light is actually projected onto the scattering layer 51 or the light transmissive microstructure layer 52.
  • the light 26 projected onto the scattering layer 5 1 or the light transmissive microstructure layer 52 is scattered by the scattering layer 5 1 or transmitted through the microstructure layer 52, and then exits to the splicing slit 12 and finally exits from the front surface of the screen system.
  • the light transmissive microstructure layer may be a stepped microprism layer parallel to the front surface of the Fresnel lens, or an ordered poly microsphere layer such as a microsphere defect layer or a micro pyramid layer.
  • the light 26 of this embodiment exceeds the value of the image range displayed by the rear projection screen 25, which is the same as the first optical structure embodiment, and is not described herein.
  • the optical structure used in this embodiment is shown in FIG. 12, and the overall splicing structure is as shown in FIG. 17.
  • the whole splicing display system is mainly composed of a plurality of rear projection units 1 1 spliced together, and there is one between two adjacent rear projection units. Splicing the slit 12.
  • Each of the rear projection units 11 is configured by the projector 21 and the screen system 22 in order according to the optical path.
  • the screen system 22 is mainly composed of a fixed bracket 23, a Fischer lens 24, and a rear projection screen 25. At the position where the Fresnel lens 24 is in contact with the fixing bracket 23, a wedge 61 is provided adjacent to the fixing bracket 23, and the wedge cannot block the edge light projected to the front of the screen.
  • the range of the light 26 projected by the projector 21 of the present embodiment is expanded relative to the prior art, slightly exceeding the range of the image displayed by the rear projection screen 25, beyond the edge of the light projection screen system; as in this embodiment,
  • the wedge 61 is disposed on the edge of the screen system, so that the excess light is actually projected onto the wedge 61.
  • the light 26 projected onto the wedge 61 is refracted by the surface of the wedge 61, and is incident on the Fresnel at an angle different from that of the wedge 61.
  • the side surface of the lens 24 is such that it avoids total reflection on the side and can be transmitted from the side and incident on the splicing slit 12, and finally exits from the front of the screen system.
  • the fixing bracket 23 or the end of the fixing bracket contacting the screen system may further be made of a light-transmitting material, for example, the material of the fixing bracket 23 is changed into a light-transmitting material, or the fixing bracket 23 is in contact with the screen system. The material at one end is replaced by a light transmissive material to increase the amount of light transmitted into the splicing gap.
  • the light 26 of this embodiment exceeds the value of the image range displayed by the rear projection screen 25, which is the same as the first optical structure embodiment, and will not be described herein.
  • the structure of this embodiment is shown in FIG. 13.
  • the whole splicing display system is composed of a plurality of rear projection units spliced together, and a splicing seam exists between two adjacent rear projection units.
  • Each of the rear projection units is configured by the projector and the screen system in sequence according to the optical path.
  • the screen system includes a fixing bracket 23, and an outer glass plate 70, a rear projection screen 25, a Fresnel lens 71, and a light transmissive plate 72, which are sequentially fixedly connected, wherein the light transmissive plate 72 is disposed inside the Fresnel lens 71 and mounted on Between the Fischer lens 71 and the fixed bracket 23.
  • the Fresnel lens 71 corresponds to the projector, and the projection range of each projector is aligned with its corresponding Fresnel lens; the Fresnel lenses of the adjacent two screen systems are spliced to each other.
  • the outer glass plate 70, the rear projection screen 25, and the light transmissive plate 72 are also respectively used in correspondence with the projector, and are used by a single rear projection unit.
  • the range of the ray 26 projected by the projector 21 used in the present invention is expanded relative to the prior art, beyond the range of the image displayed by the rear projection screen 25, beyond Part of the light is projected onto the side of the screen system; the invention provides a chamfer on the side of the Fresnel lens 71 which is spliced to each other, the chamfer angle is set around the Fresnel lens near the side of the projector, and a chamfer is provided.
  • the cutting surface can be a flat surface or an arbitrary curved surface.
  • the cutting surface penetrates as far as possible into the middle of the film, but it cannot affect the projection light corresponding to the edge of the image displayed on the front side of the projection screen in the Fresnel lens, that is, the depth of the cut angle is smaller than the edge of the image displayed on the front of the screen system.
  • the inner surface of the Neel lens refracts and propagates the path so that the chamfer does not affect the image on the front of the screen.
  • the corresponding edge ray is refracted from the Fresnel lens and projected onto the front of the screen.
  • a small portion of the light that exceeds the range of the image displayed by the rear projection screen 25 is projected onto the cutting surface and the edge of the light-transmitting plate 72, and the light projected onto the cutting surface of the Fresnel lens 71 is refracted or scattered by the cutting surface and then enters the splicing seam.
  • the light projected onto the edge of the light-transmitting plate 72 is emitted from the outer edge of the cutting surface of the Fresnel lens 71 to the splicing seam, and the light enters the splicing seam, illuminates the splicing seam, and is then ejected to the screen system through the splicing seam.
  • the front side; thus, the stitching seam 12 in Fig. 1 where no light has arrived is illuminated, thereby eliminating the black line at the stitching seam 12, thereby achieving the beneficial effect of effectively eliminating the image stitching seam.
  • the light 26 exceeds the value of the image range displayed by the rear projection screen 25, preferably within one pixel, more preferably within 0.5 pixels. If the value exceeds the above range, the black line of the stitching seam can be eliminated, and the pixels of the image are not lost.
  • the splicing structure shown in FIG. 13 belongs to a case where the splicing gap is relatively large; in this case, it is preferable to provide a scattering sheet made of a scattering material or a rough surface in the splicing slit, or may be filled in the splicing seam.
  • a scattering layer made of a scattering material, a diffusing sheet or a scattering layer guides the light entering the stitching seam to the front of the screen system, eliminating the black line of the stitching The effect will be better.
  • the diffusing sheet may be disposed in the seam or the fixed connecting portion of the screen itself, as shown in FIG. 22; at this time, the projected light entering the stitching may propagate along the diffusing sheet and then exit from the front of the screen. , Participate in the image display of the entire splicing screen, eliminating the stitching of the image.
  • the present invention can also be applied to a splicing structure in which the splicing seam is smaller, and the outer glass plate 70, the rear projection screen 25, and the light transmissive plate 72 respectively correspond to the projector, as shown in Fig. 18.
  • the invention can also be applied to a smaller splicing seam, and the outer glass plate 70 is shared by a plurality of rear projection units, and the rear projection screen 25 and the light transmissive plate 72 respectively correspond to the projector-splicing structure, as shown in FIG. Shown.
  • the invention can also be applied to the splicing seam being smaller, and the outer glass plate 70 and the rear projection screen 25 are shared by a plurality of rear projection units, and the light transmissive plate 72 and the projector are correspondingly arranged in the splicing structure, as shown in FIG. 20 Shown.
  • the invention can also be applied to a splicing structure in which the splicing seam is smaller, and the outer glass plate 70, the rear projection screen 25, and the light transmissive plate 72 are shared by a plurality of rear projection units, as shown in FIG.
  • the screen system of the present invention may have no outer glass sheet 70.
  • the outer glass plate 70 and the light transmissive plate 72 may be organic glass or any other plate that transmits light.
  • the light-transmitting plate 72 uses a material similar to that of the Fresnel lens 71, it may be in a form integral with the Fresnel lens 7, and the chamfered surface of the Fresnel lens is deformed into a groove on the side thereof. structure.

Abstract

L'invention porte sur un procédé et un dispositif de traitement d'image servant à effectuer un affichage sur grand écran à raccord sans discontinuité. Le procédé comprend les opérations suivantes : une image est divisée en certains blocs d'image par un module de traitement de division d'image, et une image d'interstice est ajoutée à la partie de bord de joint de chaque bloc d'image adjacent, l'image formée étant une sous-image. Dans le procédé, l'image d'interstice est la même que l'image de la partie de bord du bloc d'image divisé respectif; après un ajustement d'éclairement, chaque sous-image est projetée sur l'unité d'affichage correspondante pour être affichée, et l'image d'interstice de chaque image adjacente est guidée vers l'interstice entre des unités d'affichage adjacentes par l'intermédiaire de la structure optique de guidage de l'unité d'affichage et l'interstice de raccord de l'unité d'affichage est éclairé, de sorte que l'affichage d'image existe également dans l'interstice de raccord. Grâce à l'invention, le raccord sans discontinuité est en fait obtenu sans perte des pixels d'image, de sorte que la transition d'image entre les unités d'affichage à raccord est naturelle et lisse, et l'effet d'affichage global est meilleur.
PCT/CN2010/071155 2009-04-29 2010-03-19 Procédé et dispositif de traitement d'image pour système d'affichage à raccord sans discontinuité WO2010124542A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN200910039102.3 2009-04-29
CN 200910039102 CN101556425B (zh) 2009-04-29 2009-04-29 一种背投影单元无缝拼接方法及专用光学结构
CN200910041563.4 2009-07-31
CN2009100415634A CN101644876B (zh) 2009-07-31 2009-07-31 可消除背投影单元拼接黑线的拼接显示系统
CN200910192652.9 2009-09-24
CN2009101926529A CN101692335B (zh) 2009-09-24 2009-09-24 一种实现无缝拼接大屏幕显示的图像处理方法及其装置

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CN110148143A (zh) * 2019-04-02 2019-08-20 南京图格医疗科技有限公司 一种基于fpga的图像分割并同步显示的方法
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TWI556034B (zh) * 2012-07-05 2016-11-01 友達光電股份有限公司 顯示裝置
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CN110148143A (zh) * 2019-04-02 2019-08-20 南京图格医疗科技有限公司 一种基于fpga的图像分割并同步显示的方法
CN112055159A (zh) * 2019-06-06 2020-12-08 海信视像科技股份有限公司 画质处理装置和显示设备
CN112399095A (zh) * 2019-08-15 2021-02-23 西安诺瓦星云科技股份有限公司 视频处理方法、装置和系统
CN113450257A (zh) * 2020-08-18 2021-09-28 杭州海康汽车软件有限公司 一种图像拼接瑕疵的测试方法及装置
CN113450257B (zh) * 2020-08-18 2023-02-07 杭州海康汽车软件有限公司 一种图像拼接瑕疵的测试方法及装置
CN113674638A (zh) * 2021-08-26 2021-11-19 西安热工研究院有限公司 一种lcd拼接屏与rgb相机工作距离的调节系统及方法
CN116698376A (zh) * 2023-08-08 2023-09-05 徐州隆运好信息科技有限公司 基于场景模拟的户外拼接显示屏质量均匀性智能测试方法
CN116698376B (zh) * 2023-08-08 2023-11-07 徐州隆运好信息科技有限公司 基于场景模拟的户外拼接显示屏质量均匀性智能测试方法

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