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  1. $ convert 前.jpg -colorspace hsl -channel g -evaluate multiply 1.2 +channel -colorspace srgb 後.jpg
  2.  
  3. $ convert 前.jpg -colorspace hsl -channel g -evaluate multiply 2 +channel -colorspace srgb 後.jpg
  4.  
  5. $ convert 前.jpg -colorspace hsl -channel g -evaluate log 1 +channel -colorspace srgb 後.jpg
  6.  
  7. $ convert 前.jpg -colorspace hsl -channel g -evaluate log 1.3 +channel -colorspace srgb 後.jpg
  8.  
  9. $ convert 前.jpg -colorspace rgb -gamma 1.36 g -evaluate log 1.3 +channel -colorspace srgb 後.jpg
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