def chromakey(person, background):
'''Replace blue pixels in the person picture with the corresponding
pixels in the background picture. The pictures must have the same dimensions.'''
colour = media.get_color(media.get_pixel(person, 60, 60))
for p in person:
# 42 is a guess. Other values might work much better.
if media.distance(media.get_color(p), colour) < 42:
x = media.get_x(p)
y = media.get_y(p)
background_px = media.get_pixel(background, x, y)
media.set_color(p, media.get_color(background_px))
def getColor(pic, x, y):
if getWidth(pic) > x and getHeight(pic) > y:
pix = media.get_pixel(pic, x, y)
clr = media.get_color(pix)
return list(clr.get_rgb())
else:
return None
def flip(pic):
'''(Pic) -> Picture
Return a new picture that contains the pixels of the original picture flipped across the vertical axis.'''
copy = media.copy(pic)
max_x = media.get_width(pic)
max_y = media.get_height(pic)
for x in range(max_x/2):
for y in range(max_y):
originalpix = copy.get_pixel(x,y)
reversepix = copy.get_pixel((max_x - x - 1), y)
color = media.get_color(originalpix)
reversecolor = media.get_color(reversepix)
media.set_color(originalpix,reversecolor)
media.set_color(reversepix,color)
return copy
def flip(pic):
'''(Pic) -> Picture
Return a new picture that contains the pixels of the original picture flipped across the vertical axis.'''
copy = media.copy(pic)
max_x = media.get_width(pic)
max_y = media.get_height(pic)
for x in range(max_x / 2):
for y in range(max_y):
originalpix = copy.get_pixel(x, y)
reversepix = copy.get_pixel((max_x - x - 1), y)
color = media.get_color(originalpix)
reversecolor = media.get_color(reversepix)
media.set_color(originalpix, reversecolor)
media.set_color(reversepix, color)
return copy
def test_pixel_set_get_color(self):
"""Test setting and getting the color of a pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
c = media.aqua
media.set_color(p, c)
self.assert_(media.get_color(p) == media.aqua)
def test_pixel_set_get_color(self):
"""Test setting and getting the color of a pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
c = media.aqua
media.set_color(p, c)
self.assert_(media.get_color(p) == media.aqua)
def count_black(pic):
'''(Pic) -> int
Returns the quantity of pixels in pic that are black as an integer.'''
black_pixels = 0
for pix in pic:
if media.get_color(pix) == media.black:
black_pixels += 1
return black_pixels
def count_black(pic):
'''(Pic) -> int
Returns the quantity of pixels in pic that are black as an integer.'''
black_pixels=0
for pix in pic:
if media.get_color(pix) == media.black:
black_pixels += 1
return black_pixels
def mirror_pixels(pic, x1, y1, x2, y2):
'''Set the colour of the pixel (x2, y2) to the colour of pixel (x1, y1)
in picture pic. This code is based on CSC108 LEC5101 Week 5 Wednesday
notes.'''
#This is a helper function
pix = media.get_pixel(pic, x1, y1)
pix2 = media.get_pixel(pic, x2, y2)
col = media.get_color(pix)
media.set_color(pix2, col)
def test_crop_image():
'''Test the function crop_image in img_manip.'''
new_pic = create_pic(4, 4)
new_pic_cropped = img_manip.crop_image(new_pic, 1, 1, 2, 2)
#Test if the colour of each pixel in new_pic is equal to the colour of the
#corresponding pixel in new_pic_cropped. If not, the boolean cropped is
#made False.
cropped = True
for x in range(2):
for y in range(2):
new_pic_pix = media.get_pixel(new_pic, x + 1, y + 1)
new_pic_cropped_pix = media.get_pixel(new_pic_cropped, x, y)
col1 = media.get_color(new_pic_pix)
col2 = media.get_color(new_pic_cropped_pix)
if col1 != col2:
cropped = False
assert cropped, \
"crop_image failed to crop the picture correctly."
def test_rotate_left270_right90():
'''Test the function rotate_left270_right90 in img_manip.'''
new_pic = create_pic(4, 4)
new_pic_rotated = img_manip.rotate_left270_right90(new_pic)
#Test if the colour of each pixel in new_pic is equal to the colour of the
#corresponding pixel in new_pic_rotated. If not, the boolean rotated is
#made False.
rotated = True
for x in range(4):
for y in range(4):
new_pic_pix = media.get_pixel(new_pic, x, y)
new_pic_rotated_pix = media.get_pixel(new_pic_rotated, 3 - y, x)
col1 = media.get_color(new_pic_pix)
col2 = media.get_color(new_pic_rotated_pix)
if col1 != col2:
rotated = False
assert rotated, \
"rotate_left270_right90 failed to rotate the picture correctly."
def test_horizontal_reflection():
'''Test the function horizontal_reflection in img_manip.'''
new_pic = create_pic(4, 4)
new_pic_reflected = img_manip.horizontal_reflection(new_pic)
#Test if the colour of each pixel in new_pic_horizontal_reflection is equal to
#the colour of the corresponding pixel in new_pic. If not, the boolean
#reflected is made False.
reflected= True
width = media.get_width(new_pic)
height = media.get_height(new_pic)
for x in range(width):
for y in range(height):
pix1 = media.get_pixel(new_pic, x, y)
pix2 = media.get_pixel(new_pic_reflected, width - x - 1, y)
col1 = media.get_color(pix1)
col2 = media.get_color(pix2)
if col1 != col2:
reflected = False
assert reflected, \
"horizontal_reflection failed to reflect the image horizontally."
def test_create_pic_color(self):
"""Create a WIDTH by HEIGHT picture and check for proper
dimensions and color."""
pic = media.create_picture(WIDTH, HEIGHT, media.magenta)
width = media.get_width(pic)
height = media.get_height(pic)
self.assert_(width == WIDTH,
'expected pic width of %s, saw %s' % (WIDTH, width))
self.assert_(height == HEIGHT,
'expected pic width of %s, saw %s' % (HEIGHT, height))
for p in pic:
self.assert_(media.get_color(p) == media.magenta)
def chromakey(person, background):
'''Replace blue pixels in the person picture with the corresponding
pixels in the background picture. The pictures must have the same
dimensions.'''
for pixel in person:
# If the blue dominates the pixel, replace its colour with the colour of
# the corresponding pixel from the background picture.
if media.get_blue(pixel) > media.get_green(pixel) and \
media.get_blue(pixel) > media.get_red(pixel):
x = media.get_x(pixel)
y = media.get_y(pixel)
background_px = media.get_pixel(background, x, y)
media.set_color(pixel, media.get_color(background_px))
def test_mirror_horizontal():
'''Test the function mirror_horizontal in img_manip.'''
new_pic = create_pic(4, 4)
new_pic_mirror_horizontal = img_manip.mirror_horizontal(new_pic)
#Test if the colour in each pixel in new_pic_mirror_horizontal is equal to
#the colour of the pixel that is its horizontal mirror. If not, the boolean
#mirrored is made False.
mirrored = True
width = media.get_width(new_pic_mirror_horizontal)
height = media.get_height(new_pic_mirror_horizontal)
middle = width / 2
for x in range(width):
for y in range(middle):
pix1 = media.get_pixel(new_pic_mirror_horizontal, x, y)
pix2 = media.get_pixel(new_pic_mirror_horizontal, x, height - y - 1)
col1 = media.get_color(pix1)
col2 = media.get_color(pix2)
if col1 != col2:
mirrored = False
assert mirrored, \
"mirror_vertical failed to mirror the picture vertically."
def test_create_pic_color(self):
"""Create a WIDTH by HEIGHT picture and check for proper
dimensions and color."""
pic = media.create_picture(WIDTH, HEIGHT, media.magenta)
width = media.get_width(pic)
height = media.get_height(pic)
self.assert_(width == WIDTH,
'expected pic width of %s, saw %s' % (WIDTH, width))
self.assert_(height == HEIGHT,
'expected pic width of %s, saw %s' % (HEIGHT, height))
for p in pic:
self.assert_(media.get_color(p) == media.magenta)
def expand_width(pic, expanding_factor):
''' Take Picture pic and return a duplicate of it that is horizontally
stretched by an Integer expanding_factor'''
new_width = (pic.get_width()) * expanding_factor
new_height = pic.get_height()
newpic = media.create_picture(new_width, new_height, media.black)
for pixel in newpic:
x_coordinate = media.get_x(pixel) / expanding_factor
y_coordinate = media.get_y(pixel)
newpixel = media.get_pixel(pic, x_coordinate, y_coordinate)
new_color = media.get_color(newpixel)
media.set_color(pixel, new_color)
return newpic
def crop_image (pic, x1, y1, x2, y2):
'''Crop from the picture pic a rectangular area from (x1, y1) to
(x2, y2), and return the area as a picture.'''
top_left_x = min(x1, x2)
top_left_y = min(y1, y2)
btm_right_x = max(x1, x2)
btm_right_y = max(y1, y2)
new_pic = media.create_picture(abs(x1 - x2) + 1, abs(y1 - y2) + 1)
for row in range(top_left_x, btm_right_x + 1):
for column in range(top_left_y, btm_right_y + 1):
x = row - top_left_x
y = column - top_left_y
pix = media.get_pixel(new_pic, x, y)
color = media.get_color(media.get_pixel(pic, row, column))
media.set_color(pix, color)
return new_pic
def expand_height(pic, expanding_factor):
''' Take Picture pic and return a duplicate of it that is vertically
stretched by an Integer expanding_factor'''
new_width = pic.get_width()
new_height = pic.get_height() * expanding_factor
#create a new pic with new width, height and color black
newpic = media.create_picture(new_width, new_height, media.black)
#in new pic, align the x/y coordinate to that of old pic, get pixel and
#use that pixel to get its color and set it as the new color for new pic
for pixel in newpic:
x_coordinate = media.get_x(pixel)
y_coordinate = media.get_y(pixel) / expanding_factor
newpixel = media.get_pixel(pic, x_coordinate, y_coordinate)
new_color = media.get_color(newpixel)
media.set_color(pixel, new_color)
return newpic
import media
baseball = media.load_picture('baseball.png')
lake = media.load_picture('lake.png')
width, height = media.get_width(baseball), media.get_height(baseball)
for y in range(0, height):
for x in range(0, width):
# Position the top-left of the baseball at (50, 25)
from_p = media.get_pixel(baseball, x, y)
to_p = media.get_pixel(lake, 50 + x, 25 + y)
media.set_color(to_p, media.get_color(from_p))
media.show(lake)
# -*- coding: utf-8 -*-
import media
pic = media.load_picture(media.choose_file())
for p in pic:
c = media.get_color(p)
c.r = c.g = c.b = (c.r + c.g + c.b) / 3
media.set_color(p, c)
media.show(pic)
