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 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 simple_difference(pic_1, pic_2):
''' Return an integer value indicating the difference between two Pictures,
pic_1 and pic_2, with the same dimensions'''
sum_diff = 0
#sum up all the distances for the corresponding pixels in the two pictures.
#(add up all RGB value differences between pixels in the two pics)
for pixel in pic_1:
x_coordinate = media.get_x(pixel)
y_coordinate = media.get_y(pixel)
sum_diff += distance(media.get_pixel(pic_1, x_coordinate, y_coordinate),
media.get_pixel(pic_2, x_coordinate, y_coordinate))
return sum_diff
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 test_get_pixel_bottom_right(self):
"""Test getting the bottom left pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
self.assert_(media.get_x(p) == WIDTH - 1)
self.assert_(media.get_y(p) == HEIGHT - 1)
def test_get_pixel_top_left(self):
"""Test getting the top left pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, 0, 0)
self.assert_(media.get_x(p) == 0)
self.assert_(media.get_y(p) == 0)
def test_get_pixel_top_left(self):
"""Test getting the top left pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, 0, 0)
self.assert_(media.get_x(p) == 0)
self.assert_(media.get_y(p) == 0)
def test_get_pixel_bottom_right(self):
"""Test getting the bottom left pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
self.assert_(media.get_x(p) == WIDTH - 1)
self.assert_(media.get_y(p) == HEIGHT - 1)
def reduce_width(pic, reducing_factor):
''' Take Picture pic and return a duplicate of it that is horizontally
compressed by an Integer reducing_factor'''
# Create a new Picture with the appropriate old height and new width, and
# initialize the colour to black (all colour components are zero).
new_width = (pic.get_width() - 1) / reducing_factor + 1
new_height = pic.get_height()
newpic = media.create_picture(new_width, new_height, media.black)
# Iterate through all the Pixels in the large image, and copy
# a portion of that Pixel's colour components into the correct
# Pixel position in the smaller image.
for pixel in pic:
# Find the corresponding Pixel in the new Picture.
x_coordinate = media.get_x(pixel)/reducing_factor;
y_coordinate = media.get_y(pixel);
newpixel = media.get_pixel(newpic, x_coordinate, y_coordinate)
# Add the appropriate fraction of this Pixel's colour components
# to the components of the corresponding Pixel in the new Picture.
new_red = newpixel.get_red() + pixel.get_red()/reducing_factor
new_blue = newpixel.get_blue() + pixel.get_blue()/reducing_factor
new_green = newpixel.get_green() + pixel.get_green()/reducing_factor
media.set_red(newpixel, int(new_red))
media.set_blue(newpixel, int(new_blue))
media.set_green(newpixel, int(new_green))
return newpic
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 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 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 pic_process():
pic = media.load_image("/home/auroua/workspace/lena.jpg")
width,height = media.get_width(pic),media.get_height(pic)
for x in range(0,height,2):
for y in range(0,width+1):
p = media.get_pixel(pic,x,y)
media.set_color(p,media.black)
media.show(pic)
def test_3_white_pixels_1_black_pixel():
"""Test if average_brightness calculates the correct value for a 2x2 picture
consisting of 3 white pixels and 1 black pixel."""
new_pic = media.create_picture(2, 2, media.white)
media.set_color(media.get_pixel(new_pic, 0, 0), media.black)
assert (
average_brightness.average_brightness(new_pic) == 255 * 3 / 4.0
), "The expected average brightness for a picture with 3 white pixels \
def overlay_picture(pic, pic2):
'''(Pic, Pic2) -> Picture Return a new picture with each pixel's
color values made up of 80% of the color values of the corresponding pixel
in the first picture and 20% of the color values of the corresponding pixel
in the second picture'''
new_pic=media.copy(pic)
for pix in new_pic:
x = media.get_x(pix)
y = media.get_y(pix)
p1 = media.get_pixel(pic, x,y)
p2 = media.get_pixel(pic2,x,y)
red = (int(p1.get_red()) * 0.8) + (int(p2.get_red()) * 0.2)
green = (int(p1.get_green()) * 0.8) + (int(p2.get_green()) * 0.2)
blue = (int(p1.get_blue()) * 0.8) + (int(p2.get_blue()) * 0.2)
new_color = media.create_color(red, green, blue)
media.set_color(pix, new_color)
return new_pic
def overlay_picture(pic, pic2):
'''(Pic, Pic2) -> Picture Return a new picture with each pixel's
color values made up of 80% of the color values of the corresponding pixel
in the first picture and 20% of the color values of the corresponding pixel
in the second picture'''
new_pic = media.copy(pic)
for pix in new_pic:
x = media.get_x(pix)
y = media.get_y(pix)
p1 = media.get_pixel(pic, x, y)
p2 = media.get_pixel(pic2, x, y)
red = (int(p1.get_red()) * 0.8) + (int(p2.get_red()) * 0.2)
green = (int(p1.get_green()) * 0.8) + (int(p2.get_green()) * 0.2)
blue = (int(p1.get_blue()) * 0.8) + (int(p2.get_blue()) * 0.2)
new_color = media.create_color(red, green, blue)
media.set_color(pix, new_color)
return new_pic
def horizontal_reflection (pic):
'''Create and return a copy of the picture pic which appears as a horizontal
reflection of pic.'''
width = pic.get_width()
height = pic.get_height()
new_pic = media.create_picture(width, height, media.white)
for pix in pic:
media.set_color(media.get_pixel(new_pic, width - pix.get_x() - 1, \
pix.get_y()), pix.get_color())
return new_pic
def rotate_left180_right180 (pic):
'''Return new_pic, a picture created by rotating picture pic 180 degrees.'''
width = pic.get_width()
height = pic.get_height()
new_pic = media.create_picture(width, height, media.white)
for pix in pic:
media.set_color(media.get_pixel(new_pic, width - pix.get_x() - 1, \
height - pix.get_y() - 1), pix.get_color())
return new_pic
def test_pixel_set_get_RGB(self):
"""Test setting and getting the red, green, and blue of a pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
media.set_red(p, 1)
self.assert_(media.get_red(p) == 1)
media.set_green(p, 2)
self.assert_(media.get_green(p) == 2)
media.set_blue(p, 3)
self.assert_(media.get_blue(p) == 3)
def test_pixel_set_get_RGB(self):
"""Test setting and getting the red, green, and blue of a pixel."""
pic = media.create_picture(WIDTH, HEIGHT)
p = media.get_pixel(pic, WIDTH - 1, HEIGHT - 1)
media.set_red(p, 1)
self.assert_(media.get_red(p) == 1)
media.set_green(p, 2)
self.assert_(media.get_green(p) == 2)
media.set_blue(p, 3)
self.assert_(media.get_blue(p) == 3)
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 rotate_left90_right270 (pic):
'''Return new_pic, a picture created by rotating picture pic 90 degrees
to the left.'''
width = pic.get_width()
height = pic.get_height()
new_pic = media.create_picture(height, width, media.white)
for pix in pic:
media.set_color(media.get_pixel(new_pic, pix.get_y(), \
width - pix.get_x() - 1), pix.get_color())
return new_pic
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 simple_difference(pic, pic2):
'''Return an int that is the sum of the differences between each pixel in
pic and pic2.'''
sum_difference = 0
for pixel in pic:
x_pic = media.get_x(pixel)
y_pic = media.get_y(pixel)
pixel2 = media.get_pixel(pic2, x_pic, y_pic)
difference = distance(pixel, pixel2)
sum_difference += difference
return sum_difference
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 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 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 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
def expand_width(pic, expand_factor):
'''Create a new picture new_pic that has an expanded width of pic by a
factor of expand_factor.'''
height = media.get_height(pic)
width = expand_factor * media.get_width(pic)
new_pic = media.create_picture(width, height, media.black)
for pixel in new_pic:
x = media.get_x(pixel)
y = media.get_y(pixel)
new_pixel = media.get_pixel(pic, x / expand_factor, y )
new_red = new_pixel.get_red() + pixel.get_red()
new_blue = new_pixel.get_blue() + pixel.get_blue()
new_green = new_pixel.get_green() + pixel.get_green()
media.set_red(pixel, new_red)
media.set_blue(pixel, new_blue)
media.set_green(pixel, new_green)
return new_pic
def reduce_width(pic, factor):
'''Create a new picture newpic that has a reduced width of pic by a
factor of factor.'''
new_height = pic.get_height()
new_width = (pic.get_width() + factor - 1) / factor
newpic = media.create_picture(new_width, new_height, media.black)
for pixel in pic:
x = media.get_x(pixel)
y = media.get_y(pixel)
newpixel = media.get_pixel(newpic, x/factor, y)
new_red = newpixel.get_red() + pixel.get_red()/factor
new_blue = newpixel.get_blue() + pixel.get_blue()/factor
new_green = newpixel.get_green() + pixel.get_green()/factor
media.set_red(newpixel, new_red)
media.set_blue(newpixel, new_blue)
media.set_green(newpixel, new_green)
return newpic
def flood_fill(pic, x, y, intensity, c):
'''Set all pixels in Picture pic brighter than int intensity and connected
to x, y to Color c. Preconsition: c's intensity < intensity.'''
pixel = media.get_pixel(pic, x, y)
# Only process the pixel if it's bright.
if get_intensity(pixel) > intensity:
media.set_color(pixel, c)
if 0 < x:
flood_fill(pic, x - 1, y, intensity, c)
if x < media.get_width(pic) - 1:
flood_fill(pic, x + 1, y, intensity, c)
if 0 < y:
flood_fill(pic, x, y - 1, intensity, c)
if x < media.get_height(pic) - 1:
flood_fill(pic, x, y + 1, intensity, c)
assert isinstance(result, media.Picture), \
'''a1.strikethrough(pic) should return a Picture, but it returned
%s.''' % (type(result))
# Type check a1.widen
pic = media.create_picture(30, 20)
result = a1.widen(pic)
assert isinstance(result, media.Picture), \
'''a1.widen(pic) should return a Picture, but it returned
%s.''' % (type(result))
# Type check a1.overlay_color
pic = media.create_picture(2, 3)
pix1 = media.get_pixel(pic, 0, 0)
pix2 = media.get_pixel(pic, 1, 1)
media.set_color(pix1, media.orange)
media.set_color(pix2, media.blue)
result = a1.overlay_color(pix1, pix2)
assert isinstance(result, media.Color), \
'''a1.overlay_color(pix1, pix2) should return a Color, but it returned
%s.''' % (type(result))
# Type check a1.overlay_picture
pic1 = media.create_picture(2, 3)
pix1 = media.get_pixel(pic, 0, 0)
pix2 = media.get_pixel(pic, 1, 1)
r1, g1, b1 = 50, 100, 200
r2, g2, b2 = 40, 150, 0
import media import random # make a new 100 by 100 picture pic = media.create_picture(100, 100) # get 2 random numbers between 0 and 99 to use as coordinates x = random.randint(0, 99) y = random.randint(0, 99) # get the pixel at this x,y coordinate pix = media.get_pixel(pic, x, y) # get the red, blue and green values of this pixel red = media.get_red(pix) green = media.get_green(pix) blue = media.get_blue(pix) # introduce a new colour new_color = media.orange # make a 10 x 10 rectangle of the new colour inside our # picture, starting with our x and y as the upper # left corner. (In this case, it doesn't matter if some # of the rectangle is outside the picture, as long as # the x,y corner is inside.) media.add_rect_filled(pic, x, y, 10, 10, new_color) # display the picture media.show(pic)
import media
lake = media.load_picture('lake.png')
width, height = media.get_width(lake), media.get_height(lake)
for y in range(0, height, 2): # Skip odd-numbered lines
for x in range(0, width):
p = media.get_pixel(lake, x, y)
media.set_color(p, media.black)
media.show(lake)
import media
import color
pic = media.create_picture(100, 200, media.black)
for i in range(media.get_width(pic)):
for j in range(media.get_height(pic)):
pixel = media.get_pixel(pic, i, j)
media.set_color(pixel,
media.create_color(i % 255, j % 255, 0))
pic.show()
import media import random # make a new 100 by 100 picture pic = media.create_picture(100, 100) # get 2 random numbers between 0 and 99 to use as coordinates x = random.randint(0, 99) y = random.randint(0, 99) # get the pixel at this x,y coordinate pix = media.get_pixel(pic, x, y) # get the red, blue and green values of this pixel red = media.get_red(pix) green = media.get_green(pix) blue = media.get_blue(pix) # introduce a new colour new_color = media.orange # make a 10 x 10 rectangle of the new colour inside our # picture, starting with our x and y as the upper # left corner. (In this case, it doesn't matter if some # of the rectangle is outside the picture, as long as # the x,y corner is inside.) media.add_rect_filled(pic, x, y, 10, 10, new_color) # display the picture media.show(pic)
def setColor(pic, x, y, col):
if len(col) == 3:
clr = color.Color(col[0], col[1], col[2])
if getWidth(pic) > x and getHeight(pic) > y:
pix = media.get_pixel(pic, x, y)
media.set_color(pix, clr)
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)
