CSC111 Programs for Week 10 2015
--D. Thiebaut (talk) 05:48, 6 April 2015 (EDT)
Skeleton Program for Displaying an Image
The program below will work with this image, named "catGlasses.gif". It should be located in the same directory where the program is saved.
# imageProcessingSkel.py
# D. Thiebaut
# A skeleton program to start doing image processing
# in Python
from graphics import *
# image geometry
# 424x18
# make the window the same geometry
WIDTH = 424
HEIGHT = 418
IMAGEFILENAME = "catGlasses.gif"
#----------------------------------------------------------------
def waitForClick( win, message ):
""" waitForClick: stops the GUI and displays a message.
Returns when the user clicks the window. The message is erased."""
# wait for user to click mouse to start
startMsg = Text( Point( win.getWidth()/2, win.getHeight()-15 ), message )
startMsg.draw( win ) # display message
win.getMouse() # wait
startMsg.undraw() # erase
def main():
# open the window
win = GraphWin( "Image Editor", WIDTH, HEIGHT )
# open the cat image
cat = Image( Point(WIDTH//2, HEIGHT//2), IMAGEFILENAME )
cat.draw( win )
waitForClick( win, "click to close" )
win.close()
main()
Skeleton Program for Processing an Image
# pixelProcessingSkel.py
# D. Thiebaut
# Simple skeleton program for processing
# the pixels of an image
from graphics import *
# image geometry
# 424x18
# make the window the same geometry
WIDTH = 424
HEIGHT = 418
IMAGEFILENAME = "catGlasses.gif"
#----------------------------------------------------------------
def waitForClick( win, message ):
""" waitForClick: stops the GUI and displays a message.
Returns when the user clicks the window. The message is erased."""
# wait for user to click mouse to start
startMsg = Text( Point( win.getWidth()/2, win.getHeight()-15 ), message )
startMsg.draw( win ) # display message
win.getMouse() # wait
startMsg.undraw() # erase
def makeRed( win, img ):
""" set the red component of all the pixels to 255, the
maximum value.
"""
global WIDTH, HEIGHT
for x in range( WIDTH ):
for y in range( HEIGHT ):
red, green, blue = img.getPixel( x, y )
img.setPixel( x, y, color_rgb(255, green, blue ) )
def main():
win = GraphWin( "Image Editor", WIDTH, HEIGHT )
img = Image( Point(WIDTH//2, HEIGHT//2), IMAGEFILENAME )
img.draw( win )
makeRed( win, img )
waitForClick( win, "click to close" )
win.close()
main()