Image color correction method and device based on FPGA

A color correction and image technology, applied in image communication, solid-state image signal generator, color TV and other directions, can solve the problems of loss of image details, large color space conversion error, etc., to reduce rounding errors and improve dark details. Effect

Inactive Publication Date: 2016-06-08
BEIJING TIMES OSEE TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problems in the prior art that the error caused by GAMMA correction and color space conversion is large and the image details are lost under the condition of limited FPGA resources, thereby providing an FPGA-based Image color correction method and device

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  • Image color correction method and device based on FPGA
  • Image color correction method and device based on FPGA
  • Image color correction method and device based on FPGA

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Embodiment 1

[0033] This embodiment provides an image color correction method based on a programmable logic device FPGA, figure 2 It is the flowchart of the image color correction method based on FPGA of the embodiment of the present invention, as figure 2 As shown, the process includes the following steps:

[0034] Step S1: performing color space conversion on the input image data to obtain converted multi-channel A-bit data;

[0035] Step S2: Take the high B-bit data of each A-bit data of the multi-channel A-bit data to look up the table, and obtain data whose bit widths of at least two adjacent addresses are all C bits;

[0036] Step S3: Perform an interpolation operation on the low D-bit data of each A-bit data, and at least two adjacent addresses corresponding to the high B-bit data of each A-bit data with a bit width of C bits to obtain output image data ; Wherein, A, B, C, D are natural numbers, B+D=A, B>C.

[0037] Through the above steps, only the high B-bit data of each A-bit ...

Embodiment 2

[0044] This embodiment provides an image color correction device based on a programmable logic device FPGA, image 3 Be the structural block diagram (1) of the image color correction device based on FPGA of the embodiment of the present invention, as image 3 As shown, the device includes: a first color space conversion module 32, which is used to perform color space conversion on the input image data to obtain converted multi-channel A bit data; a table look-up module 34, used to obtain the multi-channel A bit data; The high B-bit data of each road A-bit data of bit data is looked up table, obtains the data that the bit width adjacent to at least two addresses is C-bit; Interpolation operation module 36, is used for the low D bit data, and at least two adjacent addresses corresponding to the high B-bit data of each A-bit data are C-bit data for interpolation operation to obtain output image data; where A, B, C, D are natural numbers , B+D=A, B>C.

[0045] Figure 4 Be the ...

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Abstract

The invention provides an image color correction method and device based on an FPGA. The method comprises the following steps: carrying out color space conversion on input image data to obtain converted multiple paths of A bit data; extracting high B bit data of each path of A bit data in the multiple paths of A bit data to carry out table look-up to obtain at least two data with adjacent addresses and bit widths of C bits; and carrying out an interpolation operation on the low D bit data of each path of A bit data and the at least two data with adjacent addresses and bit widths of C bits of each path of A bit data to obtain output image data. The image color correction method provided by the invention is used for solving the problem in related technology of relatively large error and lost image details caused by GAMMA correction and color space conversion in the case of limited FPGA resources, so as to reduce the rounding errors in an image color correction process and perfect the dark image details after the color space conversion.

Description

technical field [0001] The invention relates to the field of image color space conversion, in particular to an FPGA-based image color correction method and device. Background technique [0002] Various display devices have unique color display characteristics, and the color coordinates of the three primary colors of red, green, and blue displayed by them construct a specific color gamut range in the color space. In order to make different display devices achieve consistency and correctness of the display effect on the input image signal, it is necessary to cooperate with the color display characteristics of the display device, and use the conversion method corresponding to the color gamut to perform color correction so that the images displayed by the display device are consistent. sex and correctness. [0003] The grayscale display of a light emitting diode (Light Emitting Diode, referred to as LED) or liquid crystal display (Liquid Crystal Display, referred to as LCD) dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/04H04N9/64
CPCH04N9/646H04N23/10
Inventor 石振振朱利人徐道武
Owner BEIJING TIMES OSEE TECH CO LTD
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