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Midterm Exam 1 Review Spring 2005: Generalized image filter

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def changeRGB(picture, Red, Green, Blue):
for p in getPixels(picture):
setRed(p, getRed(p)(1+Red))
setGreen(p, getGreen(p)(1+Green))
setBlue(p, getBlue(p)(1+Blue))
What does setRed(p,getRed(p)(1+Red))mean?
This means that you want to set the red value to the previous value times the percent change + 1. When you type an asteric on the Coweb, it doesn't show up. Check the FAQ on how to fix this. Kelly Lyons
def changeRGB(pic, ra, ga, ba):
for px in getPixels(pic):
red=getRed(px)
green=getGreen(px)
blue=getBlue(px)
setRed(px, red ra)
setGreen(px, green ga)
setBlue(px, blue ba)
show(pic)
def changeRGB(pict, r, g, b):
for p in getPixels(pict):
re=getRed(p)
gr=getGreen(p)
bl=getBlue(p)
setRed(p, re(1+r))
setGreen(p, gr(1+g))
setBlue(p, bl(1+b))
Are there any TAs out there and is this okay? thanks, Sarah C.
It looks OK to me. Kelly Lyons



def changeRGB(picture, r, g, b):

  for p in getPixels(picture):

    if r > -1 and r < 1:

      setRed(p, getRed(p) * (r + 1))

    if g > -1 and g < 1:

      setGreen(p, getGreen(p) * (g + 1))

    if b > -1 and b < 1:

      setBlue(p, getBlue(p) * (b + 1))



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