Is Image Sharpen free to use?

Yes, Image Sharpen is completely free. No registration, no account, and no hidden costs — ever.

Is my data safe when using Image Sharpen?

All processing happens directly in your browser. Your data never leaves your device — nothing is uploaded or stored on our servers.

No. All CheckTown tools work instantly without registration or sign-up.

Image Sharpen works on any device — desktop, tablet, or phone. The interface adapts to your screen size.

使用非锐化掩蔽算法锐化图像，可调节强度和半径。100% 在浏览器中运行。

上传图像

或拖放到此处

或从剪贴板粘贴

选择图像

Ctrl+Enter 运行Ctrl+Shift+C 复制

了解 USM 锐化如何通过可调的半径和数量增强图片细节和清晰度。

什么是图像锐化，以及它如何增强细节

图像锐化会增加图像内边缘处的对比度，让细节显得更清晰、更分明。最常见的技术是非锐化蒙版（unsharp masking），尽管这个名字有些违反直觉，但它其实是通过从原图中减去一个模糊版本，来识别并放大边缘的过渡，从而增强锐度。