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< > BotCompany Repo | #505 // Convert image to 1 bit (threshold 55%)

Lua code - Image transformer

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get("#372") -- getContrast

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brightnessThreshold = 0.55



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-- convert pixel by pixel



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w, h = img.width, img.height



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pixels = {}



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for y = 0, h-1 do



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  for x = 0, w-1 do



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    b = bright(rgb(img.getInt(x, y)))



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    pixels[y*w+x+1] = b >= brightnessThreshold and -1 or 0



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  end



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end




        
Author comment

    
Began life as a copy of #503

    
test run  test run with input  download  show line numbers   
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    Snippet ID:
    #505
  

  

    Snippet name:
    Convert image to 1 bit (threshold 55%)
  

    

    Eternal ID of this version:
    #505/1
  

  

    Text MD5:
    02b6b2a3d1c9d26df18deb60f438a826
  

    

    Author:
    stefan
  

  

    Category:
    image transformers
  

  

    Type:
    Lua code - Image transformer
  

        

    Public (visible to everyone):
    Yes
  

  

    Archived (hidden from active list):
    No
  

  

    Created/modified:
      2015-03-09 18:14:15
  

  

    Source code size:
    283 bytes / 14 lines
  

  

    Pitched / IR pitched:
    No / Yes
  

    

    Views / Downloads:
    647 / 154
  

      

    Referenced in:
[show references]