Difference between revisions of "Imagemagick"

Latest revision as of 22:33, 7 June 2022

 convert file.jpeg -resize 2000x2000 output-2000.jpg

Images are enlarged or reduced just enough so as to best fit into the given size.

convert file.jpeg -bordercolor yellow -border 50 output-border.jpg

Creates a yellow border of 50px

 convert -charcoal 5 charcoal.jpeg

Charcoal effect. "5" is the value.

 magick convert -set colorspace Gray -separate -average /path/to/my/file.jpeg  export.jpeg

Return bitmap

magick convert -monochrome /path/to/my/file.jpeg  export.png

The number of colours can be changed

magick convert /path/to/my/file.jpeg -dither FloydSteinberg -colors 3 export.png

magick convert /path/to/my/file.jpeg -colors 3 -colorspace gray -normalize

renders:

3 colors normalization

@@ Line 1: / Line 1: @@
-'''Lista di comandi utili Imagemagick'''
+== Imagemagick ==
+=== Basic ===
+  convert file.jpeg -resize 2000x2000 output-2000.jpg
+Images are enlarged or reduced just enough so as to best fit into the given size.
+<hr>
+ convert file.jpeg -bordercolor yellow -border 50 output-border.jpg
+Creates a yellow border of 50px
+<hr>
+  convert -charcoal 5 charcoal.jpeg
+Charcoal effect. "5" is the value.
+=== Tricks ===
+==== Gray Scale ====
+  magick convert -set colorspace Gray -separate -average /path/to/my/file.jpeg  export.jpeg
+==== Monochrome ====
+Return bitmap
+ magick convert -monochrome /path/to/my/file.jpeg  export.png
+==== Colors ====
+The number of colours can be changed
+ magick convert /path/to/my/file.jpeg -dither FloydSteinberg -colors 3 export.png
+ magick convert /path/to/my/file.jpeg -colors 3 -colorspace gray -normalize
+renders:
+[[File:May-2022--Amro.jpeg|thumb|3 colors normalization]]