[Home]Filter Plugins/Filter Unsharp


Video Audio RGB YUV YUV422 multiple instances processing type frames needed
yes no no yes no no POST 1


This filter blurs or sharpens an image depending on the sign of "amount". You can either set amount for both luma and chroma or you can set it individually (recommended). A positive value for amount will sharpen the image, a negative value will blur it. A sane range for amount is -1.5 to 1.5. The matrix sizes must be odd and define the range/strength of the effect. Sensible ranges are 3x3 to 7x7. It sometimes makes sense to sharpen the sharpen the luma and to blur the chroma.


Default values are shown in [green] in square brackets.

amount Luma and chroma (un)sharpness amount (-2.0-2.0) [0.0]

matrix Luma and chroma search matrix size (3-63 x 3-63) [0x0]

luma Luma (un)sharpness amount (-2.0-2.0) [0.0]

chroma Chroma (un)sharpness amount (-2.0-2.0) [0.0]

luma_matrix Luma search matrix size (3-63 x 3-63) [0x0]

chroma_matrix Chroma search matrix size (3-63 x 3-63) [0x0]

pre Run as a pre filter (0-1) [0]

Usage Examples

 -J unsharp=luma=0.8:luma_matrix=7x5:chroma=-0.2:chroma_matrix=3x3 

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Last edited January 1, 2005 3:20 pm by Monroe (diff)