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 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 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 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 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 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 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 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 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 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 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 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 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 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)
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)
'''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
media.set_color(pix1, media.create_color(r1, g1, b1))
media.set_color(pix2, media.create_color(r2, g2, b2))
# -*- 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)
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
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)
def turn_stars_blue(pic, intensity):
'''Find stars in Picture pic brighter than int intensity and turn them blue.'''
for pixel in pic:
if get_intensity(pixel) > intensity:
media.set_color(pixel, media.blue)
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)
for c in 'alpha':
print(c)
# ...
# a
# l
# p
# h
# a
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
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)