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图片加水印Image Watermark

为图片添加文字或图片水印Add text or image watermarks to images.

关于 图片加水印About Image Watermark

给图片加水印既能防止盗图，也能承载品牌信息。本工具支持文字水印与图片水印，位置、大小、透明度可调，支持平铺铺满，全部在浏览器本地绘制完成，原图不上传。Watermarks deter image theft and carry brand information. This tool adds text or image watermarks with adjustable position, size and opacity, including tiled coverage — all drawn locally in your browser; the original never uploads.

使用方法How to Use

  1. 上传需要加水印的图片。Upload the image to watermark.
  2. 选择水印类型：文字或图片 Logo。Choose a watermark type: text or image logo.
  3. 调整位置、大小、透明度等参数并实时预览。Adjust position, size and opacity with live preview.
  4. 下载带水印的图片。Download the watermarked image.

常见问题FAQ

怎样让水印更难被去除？How do I make a watermark harder to remove?

使用半透明、斜向平铺覆盖全图的水印，比单个角落水印难去除得多；同时注意平衡观感，避免影响主体内容。A semi-transparent, diagonally tiled watermark covering the whole image is far harder to remove than a single corner mark — just balance it against aesthetics.

加水印会损失画质吗？Does watermarking reduce quality?

导出为 JPG 等格式时会重新编码，建议将质量参数调高；PNG 导出则基本无损。Exporting to JPG re-encodes the image, so keep the quality parameter high; PNG export is essentially lossless.

支持批量处理吗？Is batch processing supported?

当前以单张处理为主，适合精修参数；大批量需求建议先用少量图片确定参数后再逐张应用。The current flow handles one image at a time, which suits tuning parameters; for large batches, finalise settings on a sample first, then apply per image.

相关阅读Related Reading

图片加水印的正确姿势：可见水印、盲水印与版权保护的边界Watermarking Images the Right Way: Visible Watermarks, Blind Watermarks and the Limits of Copyright Protection

水印不是防盗的银弹，但用对了能显著提高盗用成本。本文从可见水印的摆放策略讲起，对比盲水印与数字指纹的原理，并给出版权保护的真实边界与实操建议A watermark is no silver bullet against theft, but done right it raises the cost of misuse considerably. This article starts with visible-watermark placement, compares how blind watermarks and digital fingerprints work, and lays out the real limits of copyright protection plus practical advice.

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