#images.py:

import tkinter

import os, os.path

tk = tkinter

 

_root = None

 

class ImageView(tk.Canvas):

def __init__(self, image,

title = "New Image",

autoflush=False):

master = tk.Toplevel(_root)

master.protocol("WM_DELETE_WINDOW", self.close)

tk.Canvas.__init__(self, master,

width = image.getWidth(),

height = image.getHeight())

self.master.title(title)

self.pack()

master.resizable(0,0)

self.image = image

self.height = image.getHeight()

self.width = image.getWidth()

self.autoflush = autoflush

self.closed = False

 

def close(self):

"""Close the window"""

self.closed = True

self.master.destroy()

self.image.canvas = None

_root.quit()

 

def isClosed(self):

return self.closed

 

def getHeight(self):

"""Return the height of the window"""

return self.height

 

def getWidth(self):

"""Return the width of the window"""

return self.width

 

class Image:

def __init__(self, *args):

self.canvas = None

if len(args) == 1:

name = args[0]

if type(name) != str:

raise Exception('Must be a file name')

if name[-4:].upper() != '.GIF':

raise Exception('File must be a GIF')

if not os.path.exists(args[0]):

raise Exception('File not in current directory')

self.image = tk.PhotoImage(file = args[0], master = _root)

self.filename = args[0]

self.width = self.image.width()

self.height = self.image.height()

else: # arguments are width and height

self.width, self.height = args

self.image = tk.PhotoImage(master =_root,

width = self.width,

height = self.height)

self.filename = "smokey.gif"

def getWidth(self):

"""Returns the width of the image in pixels"""

return self.width

 

def getHeight(self):

"""Returns the height of the image in pixels"""

return self.height

 

def getPixel(self, x, y):

"""Returns a tuple (r,g,b) with the RGB color values for pixel (x,y)

r,g,b are in range(256)

 

"""

value = self.image.get(x, y)

if type(value) == int:

return (value, value, value)

elif type(value) == tuple:

return value

else:

return tuple(map(int, value.split()))

 

def setPixel(self, x, y, color):

"""Sets pixel (x,y) to the color given by RGB values r, g, and b.

r,g,b should be in range(256)

 

"""

(r, g, b) = color

r = round(r)

g = round(g)

b = round(b)

color = (r, g, b)

self.image.put("{#%02x%02x%02x}" % color, (x, y))

 

def draw(self):

"""Creates and opens a window on an image.

The user must close the window to return control to

the caller."""

if not self.canvas:

self.canvas = ImageView(self,

self.filename)

self.canvas.create_image(self.width // 2,

self.height // 2,

image = self.image)

_root.mainloop()

 

def save(self, filename = ""):

"""Saves the image to filename. If no file name

is provided, uses the image's file name if there

is one; otherwise, simply returns.

If the .gif extension is not present, it is added.

"""

if filename == "":

return

else:

self.filename = filename

path, name = os.path.split(filename)

ext = name.split(".")[-1]

if ext != "gif":

filename += ".gif"

self.filename = filename

self.image.write(self.filename, format = "gif")

 

def clone(self):

new = Image(self.width, self.height)

new.image = self.image.copy()

return new

 

def __str__(self):

rep = ""

if self.filename:

rep += ("File name: " + self.filename + "")

rep += ("Width: " + str(self.width) +

"Height: " + str(self.height))

return rep

_root = tk.Tk()

_root.withdraw()

 

The code should be in python and is in cengage so I cant use PIL
 

Transcribed Image Text:

To enlarge an image, one must fill in new rows and columns with color information based on the colors of neighboring positions in the original image. Develop and test a function named enlarge. This function should expect an image and an integer factor as arguments. The function should build and return a new image that represents the expansion of the original image by the factor. Hint: Copy each row of pixels in the original image to one or more rows in the new image To copy a row, use two index variables, one that starts on the left of the row and one that starts on the right. These two indexes converge to the middle. This will allow you to copy each pixel to one or more positions of a row in the new image.) An example of the program is shown below: Original Enlarged To enlarge an image, one must fill in new rows and columns with color information based on the colors of neighboring positions in the original image. Develop and test a function named enlarge. This function should expect an image and an integer factor as arguments. The function should build and return a new image that represents the expansion of the original image by the factor. Hint: Copy each row of pixels in the original image to one or more rows in the new image To copy a row, use two index variables, one that starts on the left of the row and one that starts on the right. These two indexes converge to the middle. This will allow you to copy each pixel to one or more positions of a row in the new image.) An example of the program is shown below: Original Enlarged

Answer rating: 100% (QA)

solution copy of the argument image by the factor argument width imagegetWidth height imagegetHeig... View the full answer