🪞 给图片加对称Add Symmetry to Image

使用说明与常见问题How-to & FAQ

「给图片加对称」是什么？What is the Add Symmetry to Image tool?

把图片沿水平或垂直轴镜像，拼成左右或上下对称图（宽或高变为原来的两倍）。适合墨迹/图案效果；全部在浏览器本地处理。Mirror an image across a horizontal or vertical axis into left–right or top–bottom symmetry (width or height doubles). Good for inkblot/pattern effects; processed entirely in your browser.

如何使用「给图片加对称」？How do I use the Add Symmetry to Image tool?

在「给图片加对称」中，选择或拖入文件，按需设置「轴」、「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 Symmetry to Image: Choose or drop your files, set "Axis", "Format", then click the Download button next to each result (with several files, "Download all (ZIP)" saves them together).

轴如何影响尺寸？How does the axis change size?

左右对称：画布宽度变为 2×，原图在左、镜像在右。上下对称：高度变为 2×，原图在上、镜像在下。透明像素会一并镜像。Left–right: canvas width becomes 2× (original left, mirror right). Top–bottom: height becomes 2× (original top, mirror bottom). Transparent pixels are mirrored too.

适合什么图？What images work best?

适合做墨迹对称、图案拼贴或快速「万花筒」效果。奇数宽度/高度仍按整像素镜像，中线可能偏半像素——需要精确光学对称时请先裁成偶数边长。Handy for inkblot symmetry, pattern tiles, or a quick kaleidoscope look. Odd widths/heights still mirror on whole pixels, so the seam can sit on a half-pixel — crop to even sizes for optical precision.

批量与格式Batch and formats

可多选图片；输出可选 PNG/JPEG/WebP。处理在浏览器本地完成，不会上传。单张过大时会受站点图片工具的像素/体积上限约束。Multi-select is supported; output can be PNG/JPEG/WebP. Processing stays in your browser. Very large images hit the same pixel/size limits as other image tools on this site.

有哪些选项可以调整？What options can I adjust?

「给图片加对称」的设置：「轴」可选 左右对称、上下对称（默认 左右对称）；「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）。每次生成结果都按当前设置处理。Settings in the Add Symmetry to Image — "Axis": Left–right, Top–bottom (default Left–right); "Format": PNG, JPG, WebP (default PNG); "Quality" default 92, range 40–100; files: common image formats (including HEIC, HEIF, AVIF, WEBP, BMP, JFIF). The result always uses the current settings.

图片会被上传到服务器吗？Are my images uploaded?

不会。「给图片加对称」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 Symmetry to Image processes images locally with the browser Canvas API and the result downloads straight from your browser.

「给图片加对称」免费吗？需要注册吗？Is the Add Symmetry to Image free? Do I need an account?

「给图片加对称」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 Symmetry 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.