How did the yuv vs rgb conversion formula come about

Updated on technology 2024-03-12
4 answers
  1. Anonymous users2024-02-06

    The YUV format has the characteristics of separating luminance information and color information, but most image processing operations are based on the RGB format.

    Therefore, when the image is post-processed and displayed, it is necessary to convert the YUV format to RGB format.

    1.Basic implementation.

    According to the conversion formula between YUV and RGB, the values of the Y, U, and V components are accessed on a pixel-by-pixel basis and converted to RGB.

    2.Implementation based on the lookup table method.

    It is time-consuming to access pixels one by one and perform floating-point operations, so the idea of space for time is used to replace some calculations in the conversion process with lookup tables.

    3.OpenCV-based implementation.

    The conversion function provided by OpenCV is used to convert YUV to RGB, which is simple and convenient. In the implementation process, you only need to construct a MAT containing YUV data reasonably.

  2. Anonymous users2024-02-05

    PS software should be able to be changed.

  3. Anonymous users2024-02-04

    We all know that every pixel on the screen is made up of RGBA, r:red, g:green, b:

    blue, a: alpha. So what does YUV do?

    YUV is similar to RGB in that each pixel contains three components: y, u, and v components. Unlike RGB encoding, the Y component and the UV component can be separated, and if there is no UV component, what we see is a black and white **, just like the previous black and white TV.

    For the YUV image, not every pixel must contain the UV component, without the UV component we just can't see the color, so we can reasonably adjust the sampling method of the UV component to achieve the purpose of saving storage space. The y-component is responsible for brightness, so the y-component is something that every pixel must sample.

    The display is displayed through the RGB model Fenglead, because of the need to save bandwidth, we chose the YUV model for transmission. Therefore, when we need to collect images, we need to convert the RGB model into the YUV model first, and then convert the YUV model into the RGB model when displaying.

    RGB to YUV conversion is to convert the R, G, and B components of all pixels in an image to Y, U, and V components. The formula for the conversion between the RGB model and the YUV model is as follows:

  4. Anonymous users2024-02-03

    Take a 1280x720 bitmap as an example.

    RGB formatRGB 24-bit format, RGB accounts for 8 bits.

    YUV formatThat is, two adjacent pixels share one UV component, and the collected YUV component is.

    The pixels after the map restoration are.

    Size calculation: 1280 * 720 * 8 + 1280 * 720 * 8 * 2 * 8 1024 1024 =

    That is, the pixels in a finger code field grid are bent with a bunch of UV components, and the collected YUV components are boring.

    The pixels after the map restoration are.

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