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Image Processing in CS1

Image Processing in CS1. Brad Miller David Ranum Luther College. Image Processing with cImage. Classes. Methods. Window Image File Image Empty Image List Image Pixel Does not require PIL. Images getWidth , getHeight getPixel,setPixel Pixels getRed , setRed

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Image Processing in CS1

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  1. Image Processing in CS1 Brad Miller David Ranum Luther College

  2. Image Processing with cImage Classes Methods • Window • Image • File Image • Empty Image • List Image • Pixel • Does not require PIL • Images • getWidth, getHeight • getPixel,setPixel • Pixels • getRed, setRed • getGreen, setGreen • getBlue, setBlue http://knuth.luther.edu/~pythonworks

  3. def blackWhite(pic): bwpic = EmptyImage(pic.getWidth(), pic.getHeight()) for row in range(pic.getHeight()): for col in range(pic.getWidth()): thepixel = pic.getPixel(col,row) r = thepixel.getRed() g = thepixel.getGreen() b = thepixel.getBlue() gray = (r + g + b)//3 if gray <= 127: p = Pixel(0,0,0) else: p = Pixel(255,255,255) bwpic.setPixel(col,row,p) return bwpic

  4. Edge Detection • Iteration Patterns • Four levels of nesting • Setting boundaries • Edge Cases • Sum of Products

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