Sharpen¶
Usage: sharpen(sharpen_amount,sharpen_radius,luminance_only)
Description¶
This filter enhances apparent sharpness of the image. It’s heavily based on Marco Rossini’s excellent Wavelet sharpen GIMP plugin. Check http://registry.gimp.org/node/9836 for details about how it work.
Arguments¶
sharpen_amount
- Sharpen amount. Typical values are between \(0.0\) and \(10.0\).sharpen_radius
- Sharpen radius. Typical values are between \(0.0\) and \(2.0\).luminance_only
- Sharpen only luminance channel. Values can betrue
orfalse
.
Example 1¶
http://localhost:8888/unsafe/filters:sharpen(2,1.0,true)/http://videoprocessing.ucsd.edu/~stanleychan/research/pix/Blurred_foreman_0005.png
Example 2¶
http://localhost:8888/unsafe/filters:sharpen(1.5,0.5,true)/http://images.cambridgeincolour.com/tutorials/sharpening_eagle2-original.jpg