def distance(Pixel_1, Pixel_2):
''' Return an integer value indicating the difference between the two
pixels Pixel_1 and Pixel_2)'''
#find the difference b/w values of pixel 2 and pixel 1 and sum the
#difference of R, G and B, then return the total diff.
distance_red = abs(media.get_red(Pixel_1) - media.get_red(Pixel_2))
distance_green = abs(media.get_green(Pixel_1) - media.get_green(Pixel_2))
distance_blue = abs(media.get_blue(Pixel_1) - media.get_blue(Pixel_2))
distance_total = distance_red + distance_green + distance_blue
return distance_total
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 overlay_color(pix1, pix2):
'''(Pix1, Pix2) -> Color
Return a new color made up of 80% of the color values of the first pixel
and 20% of the color values of the second pixel.'''
r1 = int(media.get_red(pix1))
r2 = int(media.get_red(pix2))
g1 = int(media.get_green(pix1))
g2 = int(media.get_green(pix2))
b1 = int(media.get_blue(pix1))
b2 = int(media.get_blue(pix2))
red = (r1 * 0.8) + (r2 * 0.2)
green = (g1 * 0.8) + (g2 * 0.2)
blue = (b1 * 0.8) + (b2 * 0.2)
return media.create_color(red, green, blue)
def overlay_color(pix1, pix2):
'''(Pix1, Pix2) -> Color
Return a new color made up of 80% of the color values of the first pixel
and 20% of the color values of the second pixel.'''
r1 = int(media.get_red(pix1))
r2 = int(media.get_red(pix2))
g1 = int(media.get_green(pix1))
g2 = int(media.get_green(pix2))
b1 = int(media.get_blue(pix1))
b2 = int(media.get_blue(pix2))
red = (r1 * 0.8) + (r2 * 0.2)
green = (g1 * 0.8) + (g2 * 0.2)
blue = (b1 * 0.8) + (b2 * 0.2)
return media.create_color(red, green, blue)
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 scale_blue(pic, new_blue):
'''Set the average blue of a Picture pic to a new average new_blue'''
average_blue = blue_average(pic)
pixel_ratio = float(new_blue) / average_blue
for pixel in pic:
blue = media.get_blue(pixel)
target_blue = pixel_ratio * blue
if target_blue > 255.0:
target_blue = 255
change_blue = media.set_blue(pixel, int(target_blue))
def blue_average(pic):
'''Returns the average blue value of the entire Picture pic as an int.'''
sum_blue = 0
height = media.get_height(pic)
width = media.get_width(pic)
total_pixel = height * width
for pixel in pic:
blue = media.get_blue(pixel)
sum_blue += blue
average = sum_blue / total_pixel
return int(average)
def blue_average(pic):
''' Return an average blue value of all the pixels in the Picture pic as an
integer. Truncate the result if the average calculation yields a
non-integer value.'''
sum_blue = 0
total_pix = 0
for pixel in pic:
sum_blue += media.get_blue(pixel)
total_pix += 1
average_blue = sum_blue/total_pix
return average_blue
def scale_blue(pic, new_blue_average):
''' Take the Picture pic and set the average value of all blue pixels in
the picture to the Integer new_blue_average. Return scaled Picture
Assume that the picture will have some colour component in it'''
old_average = float(blue_average(pic))
for pixel in pic:
new_blue = (new_blue_average * media.get_blue(pixel)) / old_average
if new_blue > 255:
new_blue = 255
media.set_blue(pixel, int(new_blue))
return pic
#encoding: utf8
import media
pic = media.load_picture('207.jpg')
media.show(pic)
for p in media.get_pixels(pic):
new_blue = int(0.7 * media.get_blue(p))
new_green = int(0.7 * media.get_green(p))
media.set_blue(p, new_blue)
media.set_green(p, new_green)
media.show(pic)
def test_above_freezing():
'''Test function for above_freezing.'''
pass # we'll fill this in too
if __name__ == '__main__':
nose.runmodule()
import media
pic = media.load_picture('pic207.jpg')
media.show(pic)
for p in media.get_pixels(pic):
new_blue = int(0.7 * media.get_blue(p))
new_green = int(0.7 * media.get_green(p))
media.set_blue(p, new_blue)
media.set_green(p, new_green)
media.show(pic)
def to_celsius(t):
return (t - 32.0) * 5.0 / 9.0
def above_freezing(t):
def get_intensity(pixel):
'''Return the average of the RGB components of Pixel pixel.'''
return (media.get_blue(pixel) + media.get_blue(pixel) + \
media.get_blue(pixel)) / 3
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) # the colours should have changed in our pixel
import media
f = media.choose_file()
pic = media.load_picture(f)
for p in media.get_pixels(pic):
r = media.get_red(p)
g = media.get_green(p)
b = media.get_blue(p)
gray = (g + b + r ) / 3
media.set_green(gray)
media.set_blue(gray)
media.set_red(gray)
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) # the colours should have changed in our pixel
import media
if __name__ == '__main__':
filename = media.choose_file()
pic = media.load_picture(filename)
media.show(pic)
# Reduce the blue and green by 30% each to make
# the red stand out.
for pixel in pic:
value = media.get_blue(pixel)
new_blue = int(value * 0.7)
media.set_blue(pixel, new_blue)
value = media.get_green(pixel)
new_green = int(value * 0.7)
media.set_green(pixel, new_green)
media.show(pic)
