Method for processing over-range signal of luma and chroma (YUV) color space

A signal processing and color space technology, applied in the field of video and image processing, can solve data loss and other problems

Active Publication Date: 2012-10-24
CHINA DIGITAL VIDEO BEIJING
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Problems solved by technology

[0006] According to the ITU-R BT.601 and ITU-R BT.709 standards, the values ​​of YUV space pixels are Y: 16-235, U: 16-240, V: 16-240, and the video / image signal captured by the camera is YUV The value is 0-255, if it is converted according to the ITU-R BT.601 and ITU-R BT002E709 standards, data loss will occur

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  • Method for processing over-range signal of luma and chroma (YUV) color space

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] Embodiment of the present invention one kind of YUV color space overrange signal processing method, such as figure 1 shown, including the following steps:

[0031] Step S101, acquiring a video / image signal input by an external device, the YUV space of the video / image signal being the first YUV space;

[0032] Step S102, according to the value range of the first YUV space, the value range of the second YUV space and the conversion formula betwee...

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Abstract

An embodiment of the invention discloses a method for processing an over-range signal of a luma and chroma (YUV) color space. The method comprises the steps of obtaining a video / image signal input by an external device, wherein a YUV space of the video / image signal serves as a first YUV space; calculating a conversion equation of the first YUV space and a red green blue (RGB) space according to value range of the first YUV space, value range of a second YUV space and a conversion equation of the second YUV space and the RGB space; and processing the video / image signal according to the conversion equation of the first YUV space and the RGB space. By means of the method, the over-range YUV signal is processed and is reserved completely.

Description

technical field [0001] The invention relates to the technical field of video and image processing, in particular to a method for processing over-range signals in a YUV color space. Background technique [0002] The RGB (red, green, blue) color space is a common color space in computers, which generates other colors by adding the three primary colors of red, green, and blue. Among them, RGB24 uses 24 bits to represent the color of a pixel, and red, green, and blue each occupy 8 bits, and 256*256*256 colors can be obtained. [0003] The YUV color space is a color encoding method adopted by the European television system. Among them, "Y" represents the brightness (Luminance or Luma), that is, the grayscale value; while "U" and "V" represent the chroma (Chrominance or Chroma). Color TV uses YUV space just to solve the compatibility problem between color TV and black and white TV with brightness signal Y, so that black and white TV can also receive color TV signal. The YUV we ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/14G06T7/00H04N9/64
Inventor 张婷
Owner CHINA DIGITAL VIDEO BEIJING
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