Chroma subsampling - Wikipedia
Chroma subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information, taking advantage of the human visual system's lower acuity for color differences than for luminance.
什么是色度二次采样(Chroma Subsampling)？ - 知乎专栏
这是能解释的，这次我们来讨论下色度二次采样（Chroma Subsampling）这个问题。 我们的眼睛对明度（亮度）信息的变化比对（色度）色彩信息的变化更敏感。
What is Chroma Subsampling in JPEG? - Educative
The famous image compression standard JPEG uses 4:2:0 chroma subsampling as part of its algorithm while compressing colored images in lossy mode. JPEG also supports other subsampling formats like 4:4:4, 4:2:2, and 4:1:1.
令人拍案叫绝的JPEG图像压缩原理 - 梁君牧 - 博客园
2023年4月24日 · JPEG压缩技术规定了不同quality factor下的量化值，QF越大，量化表格里的数值就越小，其损失也就越小，同时，结合人眼对色彩的敏感要低于亮度，因此，对于Y和CrCb,定义了不同的量化系数。
Chroma Subsampling in JPG Compression - Rick Matthews
Chroma subsampling is a method that stores color information at lower resolution than intensity information. The overwhelming majority of graphics programs perform 2x2 chroma subsampling, which breaks the image into 2x2 pixel blocks and only stores the average color information for each 2x2 pixel group. This process introduces two kinds of errors:
ImageSharp源码详解之JPEG编码原理（2）采样 - 程序员小张 - 博 …
2019年8月4日 · ImageSharp源码中关于采样有有两种选择，一种叫JpegSubsample.Ratio444，一种叫JpegSubsample.Ratio420。这两种选择就是对于JPEG图像的两种采样方法，就是我们常说的YUV采样。 1. 什么是YUV
Jpeg:色彩空间变换，子采样，DCT和量化 - CSDN博客
2021年12月17日 · 为了显示Jpeg编码造成的质量下降，将上述4步进行倒排，以解码图像。 在接下来的循环中，对每个通道首先执行逆量化，然后是逆dct和像素值的移位的逆移位，这样它们的值范围是[0，…，255]。
JPEG Chroma Subsampling | Online file conversion blog
2023年4月3日 · JPEG Chroma subsampling is an important tool for image compression. Understanding how to choose the right subsampling ratio can help you achieve the optimal balance between file size and image quality for your specific needs.
Chroma subsampling and JPEG sampling factors - zpl.fi
2020年8月22日 · Here's a table of common chroma subsamplings in both of notations alongside a visual representation: The typical JPEG has three channels: Y', C B and C R where Y' stores the luma of the image while C B and C R store the chroma. To enable subsampling, each channel has a horizontal and a vertical sampling factor.
Chroma Subsampling: What Is It and Why Does It Matter? - MUO
2022年9月26日 · Thankfully, human perception can be fooled with a technique known as chroma subsampling. It's a type of compression for still images and video that discards some color information without degrading the perceived visual quality. This helps reduce file size and bandwidth usage.