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A gradient-based bayer format interpolation method and fpga-based display device

An interpolation method and gradient technology, applied in the direction of solid image signal generators, image signal generators, etc., can solve the problems of high device complexity and long operation time, and achieve improved interpolation effects, improved clarity, and high resolution Effect

Inactive Publication Date: 2017-08-01
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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  • A gradient-based bayer format interpolation method and fpga-based display device

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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 gradient-based Bayer format image interpolation method and an FPGA-based display device. For the color recovery of red and blue pixels, an improvement is made in bilinear interpolation, and no simple averaging is performed on the pixels. Instead, calculate the horizontal and vertical gradients and left and right diagonal gradients of pixels according to the Sobel operator, and then determine the horizontal gradient according to the ratio relationship between the horizontal and vertical gradients and the ratio relationship , the vertical weighting coefficient and the left and right diagonal weighting coefficients, so as to obtain the interpolation result of the red and blue pixels. In the present invention, the display device adopts FPGA as the core platform, fully utilizes the advantages of its parallel processing and modular design, and reduces the realization time of module functions such as graphic picture generation, video image data collection, color interpolation processing, graphic superposition and display , which meets the display requirements of high-resolution and high-speed graphic images of an airborne display device.

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 Patents(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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