📺 显示图片的 YCbCr 颜色通道Show YCbCr Image Colors
把图片拆成 Y（亮度）、Cb、Cr（色度）三个通道分别预览：可选显示单通道灰度图，或把 Cb/Cr 映射成假彩色，便于理解 JPEG/视频压缩里的颜色空间。支持批量，图片只在浏览器本地处理。Split an image into Y (luma), Cb and Cr (chroma) channel previews - as greyscale planes or false-colour Cb/Cr maps - to see how JPEG and video colour spaces work. Works in bulk; images are processed locally.
使用说明与常见问题How-to & FAQ
「显示图片的 YCbCr 颜色通道」是什么？What is the Show YCbCr Image Colors tool?
把图片拆成 Y（亮度）、Cb、Cr（色度）三个通道分别预览：可选显示单通道灰度图，或把 Cb/Cr 映射成假彩色，便于理解 JPEG/视频压缩里的颜色空间。支持批量，图片只在浏览器本地处理。Split an image into Y (luma), Cb and Cr (chroma) channel previews - as greyscale planes or false-colour Cb/Cr maps - to see how JPEG and video colour spaces work. Works in bulk; images are processed locally.
如何使用「显示图片的 YCbCr 颜色通道」？How do I use the Show YCbCr Image Colors tool?
在「显示图片的 YCbCr 颜色通道」中，选择或拖入文件，按需设置「显示」、「输出格式」等选项，然后点击每个结果旁的「下载」按钮即可；有多个文件时也可以点「全部下载（ZIP）」一次打包下载。Choose or drop one or more images and pick what to "Show": the Y (luma) plane, Cb, Cr, or all three side by side; tick "False-colour Cb/Cr" to see the chroma planes in colour. Choose the "Format", then use each Download button or "Download all (ZIP)".
YCbCr 是什么？What is YCbCr?
把颜色拆成亮度 Y 和两个色度 Cb、Cr，是 JPEG、电视和多数视频使用的格式；人眼对亮度更敏感，所以压缩时常降低色度分辨率。It splits colour into luma Y and chroma Cb/Cr — the layout JPEG, TV and most video use. Eyes are more sensitive to luma, so compression often downsamples chroma.
假彩色怎么看？How do I read false colour?
Cb/Cr 灰度不易分辨时，假彩色用蓝绿或红蓝编码色度高低，方便看出偏色区域。Greyscale Cb/Cr is hard to read; false colour maps chroma strength to blue–green or red–blue so tinted areas stand out.
有哪些选项可以调整？What options can I adjust?
「显示图片的 YCbCr 颜色通道」的设置：「显示」可选 仅 Y 亮度、仅 Cb、仅 Cr、三通道并排（默认 仅 Y 亮度）；「输出格式」可选 PNG、JPG、WebP（默认 PNG）；「质量」默认 92，范围 40–100；可勾选：「Cb/Cr 用假彩色」（默认勾选）；可选文件：常见图片格式（含 HEIC、HEIF、AVIF、WEBP、BMP、JFIF）。改动任一选项后结果会按新设置重新生成。Settings in the Show YCbCr Image Colors — "Show": Y luma only, Cb only, Cr only, All three side by side (default Y luma only); "Format": PNG, JPG, WebP (default PNG); "Quality" default 92, range 40–100; tick boxes: "False-colour Cb/Cr" (on by default); files: common image formats (including HEIC, HEIF, AVIF, WEBP, BMP, JFIF). Changing any option regenerates the result with the new setting.
图片会被上传到服务器吗？Are my images uploaded?
不会。「显示图片的 YCbCr 颜色通道」使用浏览器 Canvas 在本地处理图片，处理后的文件直接从你的浏览器下载。No. The Show YCbCr Image Colors processes images locally with the browser Canvas API and the result downloads straight from your browser.
「显示图片的 YCbCr 颜色通道」免费吗？需要注册吗？Is the Show YCbCr Image Colors free? Do I need an account?
「显示图片的 YCbCr 颜色通道」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Show YCbCr Image Colors is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.