🧪 图片颜色通道分离（R / G / B / Alpha）Separate Image Colour Channels (R, G, B, Alpha)
把图片拆成红、绿、蓝和透明度（Alpha）通道：可以单独导出某个通道，也可以把所有通道并排放在一张图里对比；每个通道可显示为灰度（亮度 = 通道值）或保留本色。适合检查图片、制作贴图、查看蒙版和学习颜色原理，支持批量，图片只在浏览器本地处理。Split an image into its red, green, blue and alpha (transparency) channels. Export a single channel, or put all of them side by side in one image to compare. Each channel can be shown as greyscale (brightness = channel value) or in its own colour. Handy for inspecting images, making textures, checking masks and learning how colour works — works in bulk, and images are processed locally in your browser.
使用说明与常见问题How-to & FAQ
「图片颜色通道分离（R / G / B / Alpha）」是什么？What is the Separate Image Colour Channels (R, G, B, Alpha) tool?
把图片拆成红、绿、蓝和透明度（Alpha）通道：可以单独导出某个通道，也可以把所有通道并排放在一张图里对比；每个通道可显示为灰度（亮度 = 通道值）或保留本色。适合检查图片、制作贴图、查看蒙版和学习颜色原理，支持批量，图片只在浏览器本地处理。Split an image into its red, green, blue and alpha (transparency) channels. Export a single channel, or put all of them side by side in one image to compare. Each channel can be shown as greyscale (brightness = channel value) or in its own colour. Handy for inspecting images, making textures, checking masks and learning how colour works — works in bulk, and images are processed locally in your browser.
如何使用「图片颜色通道分离（R / G / B / Alpha）」？How do I use the Separate Image Colour Channels (R, G, B, Alpha) tool?
在「图片颜色通道分离（R / G / B / Alpha）」中，选择或拖入文件，按需设置「通道」、「显示方式」、「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。In the Separate Image Colour Channels (R, G, B, Alpha): Choose or drop your files, set "Channel", "Display", "Format", then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).
灰度和本色显示有什么区别？What's the difference between Greyscale and Coloured?
灰度显示把通道值直接当作亮度：越亮表示这个颜色成分越多，最容易看清细节，也是 Photoshop 等软件“通道”面板的显示方式。本色显示只保留该通道的颜色（例如红通道显示为黑到红），三张叠加起来就是原图。透明度通道总是灰度显示：白色不透明、黑色完全透明。Greyscale shows the channel value as brightness — the brighter, the more of that colour — which shows detail best and matches the Channels panel in Photoshop and similar software. Coloured keeps only that channel's colour (red runs from black to red, for example), and the three added together make the original. Alpha is always greyscale: white is opaque and black fully transparent.
为什么“全部并排”有时没有 A 通道？Why is there sometimes no A in "All side by side"?
如果图片里没有任何透明或半透明像素，Alpha 通道就是一整块白色，没有信息，所以并排时会自动省略，只输出 R、G、B 三块（结果旁会注明）。需要的话可以单独选择“透明度 A”导出。If the image has no transparent or semi-transparent pixels, the alpha channel is solid white with no information, so it's left out of the side-by-side view and only R, G and B are shown (the result notes this). You can still export it by choosing Alpha on its own.
有哪些选项可以调整？What options can I adjust?
「图片颜色通道分离（R / G / B / Alpha）」的设置：「通道」可选 全部并排、红 R、绿 G、蓝 B、透明度 A（默认 全部并排）；「显示方式」可选 灰度、本色（默认 灰度）；「输出格式」可选 PNG、JPG、WebP（默认 PNG）；「质量」默认 92，范围 40–100；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 Separate Image Colour Channels (R, G, B, Alpha) — "Channel": All side by side, Red, Green, Blue, Alpha (default All side by side); "Display": Greyscale, Coloured (default Greyscale); "Format": PNG, JPG, WebP (default PNG); "Quality" default 92, range 40–100; 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。「图片颜色通道分离（R / G / B / Alpha）」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 Separate Image Colour Channels (R, G, B, Alpha) processes images locally with the browser Canvas API and the result downloads straight from your browser.
「图片颜色通道分离（R / G / B / Alpha）」免费吗？需要注册吗？Is the Separate Image Colour Channels (R, G, B, Alpha) free? Do I need an account?
「图片颜色通道分离（R / G / B / Alpha）」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 Separate Image Colour Channels (R, G, B, Alpha) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.