Difference between revisions of "CSC111 Programs for Week 10 2015"

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[[Category:CSC111]][[Category:Python]]
 
[[Category:CSC111]][[Category:Python]]

Revision as of 10:13, 10 April 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.

CatGlasses.gif


# 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()



Image Processing: Program developed in class


# pixelProcessingSkel.py
# D. Thiebaut
# Simple skeleton program for processing
# the pixels of an image
# This is the code we developed in class
from graphics import *

# image geometry
# make the window the same geometry
WIDTH  = 424   #243 
HEIGHT = 418 #207
IMAGEFILENAME = "catGlasses.gif" #"catHat.gif"

# other image we can play with
#WIDTH  = 243 
#HEIGHT = 207
#IMAGEFILENAME = "catHat.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 saturate( x ):
    """given a color amount, 0-255, returns 0 if the amount is closer to 0 than 255,
    and returns 255 if not."""
    if x < 255//2:
        return 0
    else:
        return 255
    
def makeRed( win, img ):
    """ set the red component of all the pixels to 255, the
    maximum value.
    """
    global WIDTH, HEIGHT
    for y in range( HEIGHT ):
        win.update()
        for x in range( WIDTH ):
            red, green, blue = img.getPixel( x, y )
            green, blue, red = red, green, blue
            red = saturate( red )
            green = saturate( green )
            blue = saturate( blue )
            img.setPixel( x, y, color_rgb(red, green, blue )) 

def makeBlackAndWhite( win, img ):
    """ Make the image black and white, by making each pixel
    grey.  A grey pixel has the same amount of red, green, and blue.
    """
    global WIDTH, HEIGHT
    for y in range( HEIGHT ):
        win.update()
        for x in range( WIDTH ):
            red, green, blue = img.getPixel( x, y )
            # make the pixel grey, and use the average of the 3 values
            # as the amount of grey.
            avg = (green+blue+red)//3
            img.setPixel( x, y, color_rgb(avg, avg, avg ) )

def addBorder( win, img ):
    """add a red border at the top of the image"
    for y in range( 0, 15 ):
        for x in range( WIDTH ):
            img.setPixel( x, y, color_rgb( 255, 0, 0 ) )

def main():

    win = GraphWin( "Dominique Thiebaut", WIDTH, HEIGHT )

    img = Image( Point(WIDTH//2, HEIGHT//2), IMAGEFILENAME )
    img.draw( win )

    makeRed( win, img )
    addBorder( win, img )
    
    waitForClick( win, "click to close" )

    win.close()

main()


Playing Checkers


ChangeColorPiece.py

Piece.gif
Piece2.gif


# changeColorPiece.py
# D. Thiebaut
# Create new checkers image with different color.
# based on piece.gif.  New image saved in piece2.gif
#
from graphics import *

WIDTH = 80  # dimension of checkers piece
HEIGHT= 80

def main():
    # open the window
    win = GraphWin( "Checkers", WIDTH, HEIGHT )

    # open image of black piece
    piece = Image( Point( WIDTH//2, HEIGHT//2 ),
                   "piece.gif" )
    piece.draw( win )

    # change color of all the dark pixels
    for x in range( WIDTH ):
        for y in range( HEIGHT ):
            r, g, b = piece.getPixel( x, y )

            # don't change the color of the mostly white pixels
            if r>255-10 and g>255-10 and b>255-10:
                continue

            # create a new color based on the r,g,b of the original pixel
            newColor = color_rgb( r + (255-r)//2, g,  b+(255-b)//2 )
            piece.setPixel( x, y, newColor )

    # save modified image into new file
    piece.save( "piece2.gif" )

    # close window
    win.close()

main()


Checkers0.py


Checkers0.png

This program is the bare skeleton for display the board. You have to add the code inside the displayBoard() function.

# checkers0.py
# D. Thiebaut
# A first program to display an 8x8 chessboard
# in a graphic window.
# 
from graphics import *

WIDTH = 600    # width of the window
HEIGHT= 600    # height of the window
SIDE  = 600//8 # the side of a cell of the 8x8 board


def displayBoard( win ):
    """displays an 8x8 board in the graphic window.  The board extends to the sides of the window'''
    # add your code here...
    return

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( "Checkers", WIDTH, HEIGHT )

    # display 8x8 checkers board
    displayBoard( win )

    # wait for user to click before closing everything...
    waitForClick( win, "click to close" )

    win.close()

main()


Display Checkers


This is a cleaned up version of the program we created in class on 4/08/15. It only displays the checkers pieces on black squares only, white pieces on the top 3 rows, black pieces on the bottom 3 rows.

# checkers4.py
# D. Thiebaut
# Displays the images for the checkers.
#
from graphics import *

WIDTH = 680
HEIGHT= 680
SIDE  = 680 // 8

class CheckersPiece:
    def __init__( self, col, ii, jj ):
        self.color = col
        self.i     = ii
        self.j     = jj
        
        if col=="white":
            self.image = Image( Point( ii*SIDE + SIDE//2,
                                       jj*SIDE + SIDE//2 ), "piece2.gif" )
        else:
            self.image = Image( Point( ii*SIDE + SIDE//2,
                                       jj*SIDE + SIDE//2 ), "piece.gif" )

    def draw( self, win ):   
        self.image.draw( win )

    def undraw( self ):
        self.image.undraw()


def isWhiteCell( i, j ):
    """returns True if the cell identified by (i,j) is
    a white cell on the board.  White cells correspond to
    i+j being an even number."""
    if (i+j) % 2 == 0:
        return True
    else:
        return False
        
def displayBoard( win ):
    """display board with alternating black and white cells"""
    for i in range( 0, 8 ):
        for j in range( 0, 8 ):
            x = i * SIDE
            y = j * SIDE
            rect = Rectangle( Point( x, y ), Point( x+SIDE, y+SIDE ) )
            if isWhiteCell( i, j ): 
                rect.setFill( "white" ) 
            else:
                rect.setFill( "grey" )  
            rect.draw( win )
            #Text( Point( x+side//2, y+side//2 ),
            #      "{0:1} {1:1}".format( i, j ) ).draw(win)


def displayCheckers( win ):
    """ display checkers on black cells only, top and bottom 3 rows"""
    checkers = []
    for i in range( 8 ):
        # top 3 rows
        for j in range( 0, 3 ):
            if isWhiteCell( i, j )==False:
                piece = CheckersPiece( "white", i, j )
                piece.draw( win )
                checkers.append( piece )

        # bottom 3 rows
        for j in range( 5, 8 ):
            if isWhiteCell( i, j )==False:
                piece = CheckersPiece( "black", i, j )
                piece.draw( win )
                checkers.append( piece )
    
    return checkers

    

def main():
    # open the window
    win = GraphWin( "Checkers", WIDTH, HEIGHT )

    # display 8x8 checkers board
    displayBoard( win )

    # display the checkers on top of the board.
    # 3 rows of white checkers on black cells
    # and 3 rows of black checkers on white cells
    checkers = displayCheckers( win )
    
    win.getMouse()
    win.close()

main()