🌈 图片彩虹滤镜Add Rainbow Filter to Image

使用说明与常见问题How-to & FAQ

「图片彩虹滤镜」是什么？What is the Add Rainbow Filter to Image tool?

给图片加上彩虹渐变滤镜：可选水平、垂直、对角、径向或环形彩虹，设置强度、重复次数和混合方式（柔光、叠加、颜色、正片叠底、滤色或直接覆盖），透明背景保持透明。适合做彩虹字、骄傲月头像和梦幻风配图，支持批量，图片只在浏览器本地处理。Add a rainbow gradient filter to an image: horizontal, vertical, diagonal, radial or circular, with adjustable strength, number of repeats and blend mode (soft light, overlay, colour, multiply, screen or normal). Transparent areas stay transparent. Great for rainbow text, Pride profile pictures and dreamy graphics. Works in bulk, locally in your browser.

如何使用「图片彩虹滤镜」？How do I use the Add Rainbow Filter to Image tool?

在「图片彩虹滤镜」中，选择或拖入文件，按需设置「方向」、「混合方式」、「强度」、「重复次数」、「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 Add Rainbow Filter to Image: Choose or drop your files, set "Direction", "Blend", "Strength", "Repeats", "Format", then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).

混合方式选哪个？Which blend mode should I use?

叠加和柔光会保留原图的明暗和细节，彩虹色像一层光打在图上，适合照片（柔光更含蓄）；颜色模式只替换色相和饱和度，原图明暗不变，彩虹感最强；正片叠底让白色部分完全变成彩虹、黑色保持黑色，适合白底黑字的文字图和线稿；滤色则相反，黑色部分变成彩虹；直接覆盖就是把彩虹按强度盖在图片上。Overlay and Soft light keep the original's light, shade and detail, like rainbow light falling on the picture — good for photos (Soft light is subtler). Colour replaces only hue and saturation while keeping brightness, for the strongest rainbow look. Multiply turns white areas fully rainbow and keeps black black — ideal for black text on white or line art; Screen does the opposite and colours the dark parts. Normal simply lays the rainbow over the image at the chosen strength.

透明背景的 PNG 会怎样？What about PNGs with transparent backgrounds?

透明度会原样保留：透明的地方仍是透明的，只有图案本身被染上彩虹色，所以给抠好的 Logo、文字或贴纸加彩虹效果很合适。请选择 PNG 或 WebP 输出，JPG 不支持透明，会填成白底。Transparency is kept exactly: transparent areas stay transparent and only the artwork itself is coloured, which is perfect for cut-out logos, text or stickers. Use PNG or WebP output; JPG has no transparency and is filled with white.

方向和重复次数是什么意思？What do Direction and Repeats do?

方向决定彩虹的排列：水平是从左到右红橙黄绿青蓝紫，垂直从上到下，对角从左上到右下，径向从中心一圈圈向外，环形则绕着中心转一圈。重复次数是整张图上彩虹循环的次数，次数越多条纹越密。Direction sets how the rainbow runs: Horizontal goes red-to-violet from left to right, Vertical from top to bottom, Diagonal from top-left to bottom-right, Radial in rings from the centre and Circular sweeps once around the centre. Repeats is how many times the rainbow cycles across the picture — more repeats give narrower bands.

有哪些选项可以调整？What options can I adjust?

「图片彩虹滤镜」的设置：「方向」可选 水平、垂直、对角、径向（从中心向外）、环形（绕中心一圈）（默认 水平）；「混合方式」可选 叠加、柔光、颜色、正片叠底、滤色、直接覆盖（默认 叠加）；「强度」默认 60，范围 0–100；「重复次数」默认 1，范围 1–10；「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 Add Rainbow Filter to Image — "Direction": Horizontal, Vertical, Diagonal, Radial, Circular (default Horizontal); "Blend": Overlay, Soft light, Colour, Multiply, Screen, Normal (default Overlay); "Strength" default 60, range 0–100; "Repeats" default 1, range 1–10; "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。「图片彩虹滤镜」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 Add Rainbow Filter to Image processes images locally with the browser Canvas API and the result downloads straight from your browser.

「图片彩虹滤镜」免费吗？需要注册吗？Is the Add Rainbow Filter to Image free? Do I need an account?

「图片彩虹滤镜」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 Add Rainbow Filter to Image is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.