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Bayer format image interpolation method based on gradients and display device based on FPGA

An interpolation method and gradient technology, applied to solid image signal generators, image signal generators, etc., can solve problems such as long computing time and high device complexity, and achieve improved clarity, improved interpolation effects, real-time performance and reliability Realistic effect

Inactive Publication Date: 2016-05-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The disadvantage is that the device complexity is high and the calculation time is long

Method used

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  • Bayer format image interpolation method based on gradients and display device based on FPGA
  • Bayer format image interpolation method based on gradients and display device based on FPGA
  • Bayer format image interpolation method based on gradients and display device based on FPGA

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Embodiment Construction

[0054] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0055] Such as figure 1 As shown, the image color interpolation module in the present invention firstly uses 5 shift registers to buffer 5 rows of video image data sequentially, namely SHIFT_R1, SHIFT_R2, SHIFT_R3, SHIFT_R4, SHIFT_R5, and each shift register buffers 1 row of video image data. That is, when the first row of video image data flows out from SHIFT_R1, SHIFT_R5, SHIFT_R4, SHIFT_R3, and SHIFT_R2 respectively cache the video image data of the 5th row, the 4th row, the 3rd row, and the 2nd row. The output end of the bit register reads and temporarily stores 5 pieces of data, that is, a 5x5 pixel neighborhood template of the Bayer format video image is obtained.

[0056] Such as figure 2 As shown, according to the row and column address parity of the central pixel of the 5x5 pixel template, the template is divided into two categories and...

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Abstract

The invention discloses a Bayer format image interpolation method based on gradients and a display device based on an FPGA. Aiming at color recovery of red and blue pixels, improvement is carried out on bilinear interpolation; averaged interpolation processing is no longer simply carried out to pixels; horizontal and vertical gradients and left and right diagonal gradients of the pixels are calculated according to Sobel operators; horizontal and vertical weighting coefficients and left and right diagonal weighting coefficients are determined according to the ratio relation of the horizontal and vertical gradients and the ratio relation of the left and right diagonal gradients; therefore, the interpolation results of the red and blue pixels are obtained. The display device in the invention takes the FPGA as a core platform; the parallel processing and modular design advantages of the FPGA are utilized fully; the realization time of module functions such as graphic image generation, collection of video image data, color interpolation processing and graph overlapping and displaying is reduced; and the display demands of the airborne display device for high resolution and high rate graphic images are satisfied.

Description

technical field [0001] The present invention relates to a gradient-based Bayer format interpolation method and an FPGA-based display device, in particular to a FPGA-based method for interpolating and restoring a Bayer format image into a 24-bit true-color image, which is suitable for requiring high integration and high Video display devices with high resolution, high speed and graphics overlay. Background technique [0002] The current development of computer technology is astonishing, but because the computer is only an advanced tool that needs to be controlled and managed by humans, human-computer interaction technology has been developed. Human-computer interaction technology is to study how to realize the dialogue between human and computer in an effective way. Human-computer interaction usually includes the computer providing a large amount of information and prompts to people through output or display devices, and people inputting relevant information to the computer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/04
CPCH04N23/10
Inventor 贾银亮李冰洋张峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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