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- -- cell colour reducer - jan'11, from Paulo Silva, with help from people from GrafX2 google group (DawnBringer, Adrien Destugues (PulkoMandy), and Yves Rizoud)
- -- This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. See <http://www.gnu.org/licenses/>
- w,h=getpicturesize()
- ok,xcell,ycell=inputbox("Modify cell pixel size","xcell",8,1,16,4,"ycell",8,1,16,4);
- if ok==true then
- function grayscaleindexed(c)
- r,g,b=getcolor(c);return math.floor((b*11+r*30+g*59)/100);end
- celcnt={};for n=0,255,1 do celcnt[n+1]=0;end -- Arraycounter must have initial value
- for y1=0,h-1,ycell do
- for x1=0,w-1,xcell do
- for i=0,255,1 do
- celcnt[i+1]=0;end
- for y2=0,ycell-1,1 do
- for x2=0,xcell-1,1 do
- x=x1+x2;y=y1+y2;u=getpicturepixel(x,y)
- celcnt[u+1]=celcnt[u+1]+(1000*xcell*ycell)+math.random(0,950);end;end
- ikattr=0;paattr=0;ikcnt=0;pacnt=0
- for i=0,255,1 do
- if ikcnt<celcnt[i+1] then ikcnt=celcnt[i+1];ikattr=i;end;end
- celcnt[ikattr+1]=0
- for i=0,255,1 do
- if pacnt<celcnt[i+1] then pacnt=celcnt[i+1];paattr=i;end;end
- if grayscaleindexed(ikattr)>grayscaleindexed(paattr) then tmpr=ikattr;ikattr=paattr;paattr=tmpr;end
- wmid=math.floor((grayscaleindexed(paattr)+grayscaleindexed(ikattr))/2)
- for y2=0,ycell-1,1 do
- for x2=0,xcell-1,1 do
- x=x1+x2;y=y1+y2;u=getpicturepixel(x,y)
- if u==ikattr then
- idou=ikattr
- elseif u==paattr then
- idou=paattr
- else
- idou=ikattr
- if grayscaleindexed(u)>wmid then idou=paattr;end
- end
- putpicturepixel(x,y,idou)
- end;end;end;end;end
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