10 lines
350 B
Text
10 lines
350 B
Text
img:=PPM.readPPMFile("lenaGrey.ppm"); // a grey scale image
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median:=histogramMedian(histogram(img));
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median.println();
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bw:=PPM(img.w,img.h);
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// stream bytes from orginal, convert to black/white, write to new image
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// each pixel is 24 bit RGB
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img.data.pump(bw.data.clear(),'wrap(c){ if(c>median) 0xff else 0 });
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bw.write(File("foo.ppm","wb"));
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