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Method for converting an image from an RGB color space to a YUV color space

A RGB image and image conversion technology, applied in the field of image conversion, can solve the problems of affecting processing speed and inability to reuse, and achieve the effects of improving processing speed, easy modification and maintenance, and clear program structure

Inactive Publication Date: 2012-12-26
TVMINING BEIJING MEDIA TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the above method, numerical calculation and format control are mixed together. For the conversion of different YUV formats, the above method cannot reuse their same numerical calculation part. For the conversion of a large number of images in the same YUV format, repeatedly judge the sampling point and calculate the storage location. Affect processing speed

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  • Method for converting an image from an RGB color space to a YUV color space

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0024] figure 1 It is a flow chart of image conversion from RGB color space to YUV color space in a specific embodiment of the present invention. Such as figure 1 As shown, the process includes the following steps:

[0025] Step 101, the format control module generates and stores a format control structure, the format control structure includes the format types of multiple RGB images, the resolution of multiple RGB images, the format types of multiple YUV images, and the RGB images corresponding to the above three Each pixel is converted into the storage location information of the Y value, U value and V value of the YUV image.

[0026] Wherein, the format type of the RGB image is RGB24, RGB555, RGB565 or RGB32.

[0027] The resolution of the RGB image is 640*480, 800*600 or 1024*768.

[0028] ...

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Abstract

The invention discloses a method for converting an image from a red-green-blue (RGB) color space to a luma and chroma (YUV) color space. A format control part is encapsulated into an independent module; during conversion of an image, three parameters, namely a source RGB format, a target YUV format and an image resolution, are transmitted into the format control module, processed by the format control module and transmitted out of the format control structure; an image conversion module calls the format control structure to finish calculation of residual values; and the same control structure is used in the conversion of the images having the same source RGB format, the same target YUV format and the same image resolution. By using the technical scheme, a large amount of calculation can be saved and the processing speed can be increased during conversion of a video image.

Description

technical field [0001] The invention relates to the technical field of image conversion, in particular to an image conversion method from RGB color space to YUV color space. Background technique [0002] RGB is the most common color space in computers. It generates other colors by adding the three primary colors of red, green, and blue. RGB24 uses 24 bits to represent the color of a pixel, in which red, green, and blue each occupy 8 bits, and 256*256*256 colors can be obtained. [0003] YUV is another color space, adopted by European television systems. Among them, Y refers to the lightness of the color, that is, the brightness, and U and V refer to the hue. YUV is easy to achieve compression, convenient for transmission and processing, and can also reduce and eliminate color transformation processing, which greatly speeds up the display speed of images. [0004] The Y value, U value, and V value in the YUV format can be calculated by formulas using the R, G, and B values...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64
Inventor 王建杨波
Owner TVMINING BEIJING MEDIA TECH
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