Using the following code as a foundation (it reddens the upper left corner of an image), I was told to create 2 different programs: one that would brighten the entire image, and one that would convert the entire image to grayscale. I need major help with this. Here's the code I was given to edit:
#!/usr/bin/python
import os
import sys
from PIL import Image
#----------------------
# Function redden: adds red to the upper left 1/4 of image
# - input: inPic is the input image (not modified)
# - output: outPic is the inPic copied and modified
#----------------------
def redden(inPic,outPic):
xmax = inPic.size[0]
ymax = inPic.size[1]
for x in range(0,xmax):
for y in range(0,ymax):
p = inPic.getpixel((x,y))
if x < xmax/2 and y < ymax/2:
pnew = (p[0]+100,p[1],p[2])
else:
pnew = p
outPic.putpixel((x,y),pnew)
#----------------------
# Main program
#----------------------
# open image file that is given on command line
print "Opening image " + sys.argv[1]
inPic = Image.open(sys.argv[1])
# create output image, and an output filename
outPic = Image.new("RGB",inPic.size)
outParts = os.path.splitext(sys.argv[1])
outName = outParts[0] + '-red' + outParts[1]
print "Will create output image " + outName
# do the reddening operation (call the function!)
print "Reddening some portion..."
redden(inPic,outPic)
# save and display the result
print "Saving " + outName + "..."
outPic.save(outName)
print "Displaying..."
outPic.show()
print "Done!"
