Sharpen

Unsharp mask

Sharpening is a powerful tool to emphasise texture and details, especially on smaller images, e.g. thumbnails. Filerobot can apply an unsharp mask filter which will make your image look sharper. You can specify the filter radius (X) in pixels.

sharp=X

Examples

Preview	Syntax
	Only resize: /docs/darkside.jpg?w=300
	Resize and sharpen: /docs/darkside.jpg?w=300&sharp=3