Programowanie w systemie UNIX/ImageMagic: Różnice pomiędzy wersjami
Usunięta treść Dodana treść
m →wersja: wersja |
m →histogram: szum |
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Linia 447:
* autogamma<ref>[http://fmwconcepts.com/imagemagick/autogamma/index.php autogamma -Fred's ImageMagick Scripts]</ref>
* korekcja gamma <ref>[http://blog.hvidtfeldts.net/index.php/2012/08/gamma-correction/ h vidtfeldts : gamma-correction]</ref>
==Szum==
Lista dostępnych typów szumu ( ang. noise)
convert -list noise
Typu
* Gaussian
* Impulse
* Laplacian
* Multiplicative
* Poisson
* Random
* Uniform = no noise = solid gray
Utworzymy plik :
convert -size 1000x1000 xc:Gray -colorspace Gray +noise Uniform uniform.pgm
Opecje:
* atenuate<ref>[https://stackoverflow.com/questions/29011391/generate-random-bmp-in-cli/29011461#29011461 stackoverflow question: generate-random-bmp-in-cli]</ref>
* threshold<ref>[https://stackoverflow.com/questions/43045149/generate-image-of-certain-resolution-containing-black-and-white-noise stackoverflow question: generate-image-of-certain-resolution-containing-black-and-white-noise]</ref>
convert -size 300x200 xc:gray -attenuate 0.5 +noise random out.bmp
convert -size 600x400 xc:gray +noise random -colorspace gray -threshold 50% noise.png
==histogram==
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