Linux audio and video (YUV image Data format)

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Camera image data in the mainstream packaging format is JPEG/MJPG/YUV, these are encoded compressed data, greatly reducing the size of the image, easy to transfer and storage.

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YUV is the mainstream format of video image data, it is based on the visual characteristics of the human eye design-because the human eye of the brightness of the sensitivity than the color is much higher, and in the RGB three primary colors are particularly sensitive to green, using this principle, you can reduce the chroma information a little, the human eye is not able to look at this point.

YUV three letters, where "Y" represents luminance (Lumina nce or Luma), which is the grayscale value, while "U" and "V" represent the chroma (chrominance or chroma), which is used to describe the color and saturation of the image for specifying the colors of the pixel. We can reduce the image size by reducing the red and blue components in the image.

In many technical documents YUV will also be written ycbcr,y refers to the green and brightness, C is the first letter of component, B and r are blue and red respectively, from this point of view YUV is considered to be RGB variant.

The following is a very common YUV422:

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The following is a YUV411 with a higher compression rate:

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The following is a YUV420 with a higher compression rate:

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Linux audio and video (YUV image Data format)