Not logged in.  Login/Logout/Register | List snippets | | Create snippet | Upload image | Upload data

14
LINES

< > BotCompany Repo | #503 // Convert image to 1 bit (threshold 50%)

Lua code - Image transformer

1  
get("#372") -- getContrast

2  


3  
brightnessThreshold = 0.5



4  


5  
-- convert pixel by pixel



6  


7  
w, h = img.width, img.height



8  
pixels = {}



9  
for y = 0, h-1 do



10  
  for x = 0, w-1 do



11  
    b = bright(rgb(img.getInt(x, y)))



12  
    pixels[y*w+x+1] = b >= brightnessThreshold and -1 or 0



13  
  end



14  
end




        
Author comment

    
Began life as a copy of #373

    
test run  test run with input  download  show line numbers   
Travelled to 12 computer(s): aoiabmzegqzx, bhatertpkbcr, cbybwowwnfue, gwrvuhgaqvyk, ishqpsrjomds, lpdgvwnxivlt, mqqgnosmbjvj, pyentgdyhuwx, pzhvpgtvlbxg, tslmcundralx, tvejysmllsmz, vouqrxazstgt


2 comment(s) hidden. show

      
      
  

  

    Snippet ID:
    #503
  

  

    Snippet name:
    Convert image to 1 bit (threshold 50%)
  

    

    Eternal ID of this version:
    #503/1
  

  

    Text MD5:
    bd96867e92727d23bc2e521f226164c1
  

    

    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 18:12:48
  

  

    Source code size:
    282 bytes / 14 lines
  

  

    Pitched / IR pitched:
    No / Yes
  

    

    Views / Downloads:
    1441 / 235
  

      

    Referenced in:
[show references]