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Method and device for digital image format conversion

A format conversion and digital image technology, applied in graphics and image conversion, image enhancement, image data processing, etc., can solve problems such as color diffusion, reduction of digital image quality, and blurred edges of digital images

Active Publication Date: 2018-11-30
ACTIONS ZHUHAI TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a method and device for digital image format conversion, which are used to solve the phenomenon that the digital image will produce blurred edges and color diffusion after the digital image format is converted from YUV420 format to YUV444 format in the prior art, reducing digital image quality. image quality issues

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  • Method and device for digital image format conversion
  • Method and device for digital image format conversion
  • Method and device for digital image format conversion

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Embodiment 1

[0110] Such as Figure 2a As shown, the method for image format conversion in Embodiment 1 of the present invention includes:

[0111] Step 200, determine the position of the chromaticity component of each point in the original image in the converted image, and use the chromaticity component of each point in the original image as the chromaticity of the first type of position point in the converted image component, and determine the positions of the chrominance components of the second type of position point, the third type of position point and the fourth type of position point that need to be interpolated in the converted image;

[0112] Step 201: For the chromaticity component of a second type of location point, determine the chromaticity component value of the second type of location point according to the chromaticity component values ​​of the first type of location point on all diagonals of the rectangular area, Wherein the rectangular area is a rectangular area centere...

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Abstract

The invention provides a digital image format conversion method and device, and the method and device are used for solving problems of edge fuzzy and color diffusion caused after an image format is changed to YUV444 from YUV420, and also solving a problem of image quality reduction. According to the embodiment of the invention, the method comprises the steps: determining the chrominance component of each point in a raw image, and the positions of the chrominance components of the second, third and fourth types of position points in a converted image; determining the chrominance component values of the second types of position points according to the first type of position points on a diagonal line; and determining the chrominance component values of the third and fourth types of position points according to the points in the horizontal and vertical directions. According to the embodiment of the invention, the method determines the chrominance component values of the second, third and fourth types of position points according to the directional gradient values of the chrominance components, thereby avoiding the edge fuzzy and color diffusion of the converted image, and improving the quality of the converted image.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method and device for digital image format conversion. Background technique [0002] In the field of digital image processing technology, there are many image formats of digital images, such as: RGB (Red, Green, Blue, red, green, blue) 888, RGB565, YUV (Luminance, Chrominance, brightness, chromaticity) 420, YUV444 etc. Among them, in the fields of Video (video) and Camera (camera), digital images in YUV420 format are widely used. Usually, after the video file is decoded, it will generate a digital image data stream in YUV420 format, then convert the digital image in YUV420 format into a digital image in YUV444 format, then convert the digital image in YUV444 format into a digital image in RGB format, and finally Display digital images in RGB format. [0003] Such as Figure 1a As shown, a digital image in YUV420 format consists of three components: Y, U, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00G06T5/00
Inventor 谭世恒
Owner ACTIONS ZHUHAI TECH CO
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