import image
img = image.load_from_file('crayons.png')
negative = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # converts image to negative
for y in range(h):
r, g, b = img.get_rgb(x, y)
negative.set_rgb(x, y, abs(r - 255), abs(g - 255), abs(b - 255))
image.save_to_file(negative, 'negative.png')
image.display_images(img, negative)
import image
# asks user for input
brightness_change = int(raw_input("Enter how much you want to change the brightness: "))
img = image.load_from_file('crayons.png')
brightness = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # changes brightness by a factor determined by the user
for y in range(h):
r, g, b = img.get_rgb(x, y)
brightness.set_rgb(x, y, max(min(r + brightness_change, 255), 0), max(min(g + brightness_change, 255), 0), max(min(b + brightness_change, 255), 0))
image.save_to_file(brightness, 'brightness.png')
image.display_images(img, brightness)
import image
img = image.load_from_file('crayons.png')
posterize = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # posterizes the image
for y in range(h):
r, g, b = img.get_rgb(x, y)
posterize.set_rgb(x, y, (r/32)*32, (g/32)*32, (b/32)*32)
image.save_to_file(posterize, 'posterize.png')
image.display_images(img, posterize)
import image
img = image.load_from_file('crayons.png')
color_cycle = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # converts image through color cycling
for y in range(h):
r, g, b = img.get_rgb(x, y)
color_cycle.set_rgb(x, y, b, r, g)
image.save_to_file(color_cycle, 'color cycle.png')
image.display_images(img, color_cycle)
import image
img = image.load_from_file('crayons.png')
grayscale = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # converts image to grayscale
for y in range(h):
r, g, b = img.get_rgb(x, y)
grayscale.set_rgb(x, y, (r + g + b)/3, (r + g + b)/3, (r + g + b)/3)
image.save_to_file(grayscale, 'grayscale.png')
image.display_images(img, grayscale)
img = image.load_from_file('crayons.png')
red_only_img = image.copy_image(img)
w = img.width()
h = img.height()
# loop over every (x,y) pair
for x in range(w):
for y in range(h):
# filter out green and blue
red_only_img.set_green(x, y, 0)
red_only_img.set_blue(x, y, 0)
# save the new image to a file
image.save_to_file(red_only_img, 'red_crayons.png')
# -------------------------------
# EXAMPLE PROGRAM #2: COPY TOP
# -------------------------------
img = image.load_from_file('crayons.png')
img_copy = image.copy_image(img)
w = img.width()
h = img.height()
# loop over every x value...
for x in range(w):
# ... but only loop over y values in top half
for y in range(h/2):
# 1. Grayscale problem
# -------------------------------
img = image.load_from_file('crayons.png')
grayscale = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w):
for y in range(h):
r, g, b = img.get_rgb(x, y)
grayscale.set_rgb(x, y, (r + g + b)/3, (r + g + b)/3, (r + g + b)/3) # sets the grayscale value to the average of the red, green and blue values for each pixel
image.save_to_file(grayscale, 'grayscale.png')
print
# -------------------------------
# 2. Color cycle problem
# -------------------------------
color_cycle = image.copy_image(img)
for x in range(w):
for y in range(h):
r, g, b = img.get_rgb(x, y)
color_cycle.set_rgb(x, y, b, r, g) # cycles the colors by replacing red with blue, green with red, and blue with green pigments for each pixel
image.save_to_file(color_cycle, 'color cycle.png')
import image
img = image.load_from_file('obama.png')
obamafy = image.copy_image(img)
w = img.width()
h = img.height()
for x in range(w): # obamafies the image
for y in range(h):
r, g, b = img.get_rgb(x, y)
if (r + g + b)/3 < 60:
obamafy.set_rgb(x, y, 0, 51, 76)
elif (r + g + b)/3 < 121:
obamafy.set_rgb(x, y, 217,26,33)
elif (r + g + b)/3 <= 182:
obamafy.set_rgb(x, y, 112, 150, 158)
else:
obamafy.set_rgb(x, y, 252, 227, 166)
image.save_to_file(obamafy, 'obamafy.png')
image.display_images(img, obamafy)
