def detect_edges(original_image: Image, threshold: int) -> Image:
""" Developed by Karandev Andotra, 101141882
Reviewed by Hussein Rashid, 101141962
Return an edge detection modified copy of an image from a user-selected
original image and an input threshold value.
>>> original_image = load_image(choose_file())
>>> detect_edges_image = detect_edges(original_image, 10)
"""
new_image = copy(original_image)
width = get_width(original_image)
height = get_height(original_image)
for x in range(width):
for y in range(height):
if not y == height - 1:
r, g, b = get_color(new_image, x, y)
r_down, g_down, b_down = get_color(new_image, x, y + 1)
brightness = (r + g + b) // 3
brightness_down = (r_down + g_down + b_down) // 3
if abs(brightness - brightness_down) > threshold:
new_color = create_color(0, 0, 0)
else:
new_color = create_color(255, 255, 255)
set_color(new_image, x, y, new_color)
else:
new_color = create_color(255, 255, 255)
set_color(new_image, x, y, new_color)
return new_image
def extreme_contrast(inpic: Image) -> Image:
"""Returns a copy of the inputed image with all pixel values set to
their maximum.
Author: Yahya Shah
>>>extreme_contrast(image)
image with only black or white pixels
"""
pic = copy(inpic)
for i, m, (r, g, b) in inpic:
if r < 128:
r = 0
else:
r = 255
if g < 128:
g = 0
else:
g = 255
if b < 128:
b = 0
else:
b = 255
newcol = create_color(r, g, b)
set_color(pic, i, m, newcol)
return pic
def extreme_contrast(original_image: Image) -> Image:
""" Developed by Ahmed Abdellah, 101163588
Reviewed by Karandev Andotra, 101141882
Return an extreme contrast filtered image from a user-selected original
image.
>>> original_image = load_image(choose_file())
>>> extreme_contrast_image = extreme_contrast(original_image)
"""
new_image = copy(original_image)
for pixel in original_image:
x, y, (r, g, b) = pixel
if r <= 127:
r = 0
elif r >= 128:
r = 255
if g <= 127:
g = 0
elif g >= 128:
g = 255
if b <= 127:
b = 0
elif b >= 128:
b = 255
new_color = create_color(r, g, b)
set_color(new_image, x, y, new_color)
return new_image
def extreme_contrast(image:Image) -> Image:
'''
Function Name: Extreme Contrast
Author: Taekwan Oh 101148069
'''
'''
Returns an extremely contrasted copy of the image passed in by looking
at the brightness of each colour in each pixel in the passed in image.
>>>show(extreme_contrast(filename))
displays expected image
'''
new_image = copy(image)
for pixel in image:
x, y, (r, g, b) = pixel
if 0<=r<=127:
r = 0
elif 128<=r<=255:
r = 255
if 0<=g<=127:
g = 0
elif 128<=g<=255:
g = 255
if 0<=b<=127:
b = 0
elif 128<=b<=255:
b = 255
new_colour = create_color(r,g,b)
set_color(new_image, x, y, new_colour)
return new_image
def combine(red_image: Image, green_image: Image, blue_image: Image) -> Image:
"""
Returns a single image that is a combination
of the three r, g, b values of the inputed images.
written by: Anita Ntomchukwu
>>>combine(red_image, green_image, blue_image)
image that looks exactly like the image before being passed through the red,
green and blue channel filters.
"""
original_image1 = red_image
original_image2 = green_image
original_image3 = blue_image
comb = copy(original_image1)
for x, y, (r, g, b) in comb:
red = get_color(original_image1, x, y)[0]
green = get_color(original_image2, x, y)[1]
blue = get_color(original_image3, x, y)[2]
new_color = create_color(red, green, blue)
set_color(comb, x, y, new_color)
return comb
def detect_edges(original_image: Image, threshold: float) -> Image:
"""Takes an image, makes a copy of it and changes the color of the pixels
to black or white, depending on their contrast.
- Function written by Malak Abdou - 101139692
>>> original_image = load_image(choose_file())
>>> show(detect_edges(original_image, 15))
# Returns image with detect_edges filter applied with a threshold of 15
without modifying original.
"""
original2 = copy(original_image)
black = create_color(0, 0, 0)
white = create_color(255, 255, 255)
for x in range(get_width(original2)):
for y in range(get_height(original2) - 1):
r, g, b = get_color(original2, x, y)
r1, g1, b1 = get_color(original2, x, (y + 1))
brightness = (r + g + b) / 3
brightness1 = (r1 + g1 + b1) / 3
if abs(brightness - brightness1) > threshold:
set_color(original2, x, y, black)
else:
set_color(original2, x, y, white)
return original2
def flip_horizontal (image: Image) -> Image:
""" Author: Bardia Parmoun
Type Annotations: Cimpl.Image -> Cimpl.Image
This function takes an image, makes a copy of it and then it flips it along
the horizontal axis. It does that by swapping the colours of the pixels that
are the same distance from the top and bottom of the image.
>>> new=flip_horizontal (original_image)
>>> show(new)
(It will display a version of the image that has been flipped along the
horizontal axis)
"""
new_image = copy(image)
WIDTH = new_image.get_width()
HEIGHT = new_image.get_height()
for x in range (WIDTH):
for y in range (HEIGHT//2): # Only half of the height is needed
# Replaces the colour of the pixel with a pixel that is equally
# Distant from the bottom of the image (Same x value but the y value
# Becomes HEIGHT - y -1
col1 = get_color(new_image,x,y)
col2 = get_color(new_image,x,HEIGHT-y-1)
set_color(new_image, x,y, col2)
set_color(new_image, x,HEIGHT-y-1, col1)
return new_image
def sepia(original_image: Image) -> Image:
"""Returns a black and white image which has been tinted yellow.
>>> original_image = load_image(choose_file())
>>> sepia(original_image)
<Cimpl.Image object at 0x00000212C566DD88>
"""
new_image = copy(original_image)
sepia_filter = grayscale(new_image)
for pixel in sepia_filter:
x, y, (r, g, b) = pixel
if r < 63:
r *= 1.1
b *= 0.9
if 63 <= r <= 191:
r *= 1.15
b *= 0.85
if r > 191:
r *= 1.08
b *= 0.93
new_color = create_color(r, g, b)
set_color(sepia_filter, x, y, new_color)
return sepia_filter
def extreme_contrast(original_image: Image) -> Image:
"""Returns the 'extreme contrast' version of an image without having
modified it.
- Function written by Malak Abdou - 101139692
>>> original_image = load_image(choose_file())
>>> show(extreme_contrast(original_image))
# Returns a copy of original_image with extreme_contrast filter on it.
"""
extreme_copy = copy(original_image)
for pixel in extreme_copy:
x, y, (r, g, b) = pixel
if r <= 127:
r = 0
else:
r = 255
if g <= 127:
g = 0
else:
g = 255
if b <= 127:
b = 0
else:
b = 255
extreme_color = create_color(r, g, b)
set_color(extreme_copy, x, y, extreme_color)
return extreme_copy
def flip_vertical(image: Image) -> Image:
"""Author: Ian Holmes
Type Annotations: Cimpl.Image -> Cimpl.Image
Return a copy of the inputted image, with the pixels flipped along the
y axis.
>>> new = flip_horizontal(image)
>>> show(new)
"""
new_image = copy(image)
width = get_width(image)
height = get_height(image)
for y in range(height):
for x in range(width//2):
# Replaces the colour of the pixel with a pixel that is equally
# Distant from the right of the image (Same y value but the x value
# Becomes WIDTH - x -1
col1 = get_color(new_image, x, y)
col2 = get_color(new_image, width-x-1, y)
set_color(new_image, x, y, col2)
set_color(new_image, width-x-1,y, col1)
return new_image
def combine_test() -> None:
'''Function Name: Combine Test Function
Author: Mohamed Kaddour 101140829
'''
'''
Takes in the three images being combined and checks if their combination
is equal to that of the combined image. Prints out the pixel being tested
and the RGB values.
>>>combine_test(r_image, g_image, b_image, combined_image)
Testing Combined Image...
Testing Pixels: 225 473 RGB: (151, 144, 90) with RGB: (151, 144, 90)
...
...
...
'''
original_image = create_image(2, 1)
set_color(original_image, 0, 0, create_color(85, 44, 12))
set_color(original_image, 1, 0, create_color(24, 128, 18))
combined_image = combine(red_channel(original_image),
green_channel(original_image),
blue_channel(original_image))
print("Testing Combined Image...")
for pixel in combined_image:
x, y, (r, g, b) = pixel
comb_pix = r, g, b
acc_pix = get_color(original_image, x, y)
print("Testing Pixels:", x, y, "RGB:", comb_pix, "with RGB:", acc_pix)
if (acc_pix) != (comb_pix):
print("FAILED")
else:
print("PASSED")
def combine (image1: Image, image2: Image, image3: Image) -> Image:
""" Author: Bardia Parmoun
Type Annotations: Cimpl.Image, Cimpl.Image, Cimpl.Image -> Cimpl.Image
This functions three filtered images (red, green, blue) and creates a new
image by combining the rgb's of these three images.
Note that in order for this function to work properly the three input images
must be in .png format and should be properly filtered (for example the red
image must only have a red component in its rgb).
>>> combined_image= combine (red_image,green_image, blue_image)
>>> show (combined_image)
(This will display the combined image made from the three input images)
"""
new_image = copy(image1)
width = get_width(image1)
height = get_height(image1)
for x in range(width):
for y in range(height):
r1,g1,b1= get_color(image1, x, y)
r2,g2,b2= get_color(image2, x, y)
r3,g3,b3= get_color(image3, x, y)
# Combining the there pictures by adding their rgb values
new_colour = create_color(r1+r2+r3, g1+g2+g3, b1+b2+b3)
set_color (new_image, x,y, new_colour)
return new_image
def two_tone(image: Image, colour1: str, colour2: str) -> Image:
'''Returns a copy of inputted image with two different tones
based on user selection.
written by: Anita Ntomchukwu
>>> two_tone(image, 'red', 'white')
image with only red and white pixels
'''
two_tone_image = copy(image)
for i in range(len(COLOURS)):
if colour1 == COLOURS[i]:
tone1 = RGB_VALUES[i]
new_c1 = create_color(tone1[0], tone1[1], tone1[2])
if colour2 == COLOURS[i]:
tone2 = RGB_VALUES[i]
new_c2 = create_color(tone2[0], tone2[1], tone2[2])
for x, y, (r, g, b) in two_tone_image:
brightness = (r + g + b) // 3
if 0 <= brightness <= 127:
set_color(two_tone_image, x, y, new_c1)
elif 128 <= brightness <= 255:
set_color(two_tone_image, x, y, new_c2)
return two_tone_image
def sepia(image: Image) -> Image:
"""Returns a copy of an image with a sepia filter.
*Written by Sam Hurd*
>>> sepia(image)
image with grayscale and a yellow tint
"""
pic = grayscale(copy(image))
for x, y, (r, g, b) in pic:
if r < 63:
b = b * 0.9
r = r * 1.1
elif r <= 191:
b = b * 0.85
r = r * 1.15
else:
b = b * 0.93
r = r * 1.08
color = create_color(r, g, b)
set_color(pic, x, y, color)
return pic
def two_tone(image: Image, colour_1: str, colour_2: str) -> Image:
"""Function an image and two colours as strings from the given list:
black
white
red
lime
blue
yellow
cyan
magenta
gray
Function returns an image in two tones as per the colours given in the
second and third function parameters, decided by an individual pixel's
brightness.
-Function written by Nathan Gomes, 101143780
>>> image = load_image(choose_file())
>>> two_tone_image = two_tone(image, "red", "gray")
>>> show(two_tone_image)
>>> two_tone(image, "black", "pink")
#Error because colour passed ("pink") is not in the given list
"""
black = create_color(0, 0, 0)
white = create_color(255, 255, 255)
red = create_color(255, 0, 0)
lime = create_color(0, 255, 0)
blue = create_color(0, 0, 255)
yellow = create_color(255, 255, 0)
cyan = create_color(0, 255, 255)
magenta = create_color(255, 0, 255)
gray = create_color(128, 128, 128)
colours = [("black", black), ("white", white), ("red", red),
("lime", lime), ("blue", blue), ("yellow", yellow),
("cyan", cyan), ("magenta", magenta), ("gray", gray)]
new_image = copy(image)
for pixel in new_image:
x, y, (r, g, b) = pixel
average = (r + g + b) / 3
if (average >= 0) and (average < 128):
for i in range(len(colours)):
if colour_1 == colours[i][0]:
set_color(new_image, x, y, colours[i][1])
elif (average > 127) and (average < 256):
for i in range(len(colours)):
if colour_2 == colours[i][0]:
set_color(new_image, x, y, colours[i][1])
return new_image
def red_channel(original_image: Image) -> Image:
"""Returns the red channel of image without having modified it.
- Function written by Malak Abdou - 101139692
>>> red_channel(original_image)
<Cimpl.Image object at 0x000001C447BDFAC8>
"""
red_filter = copy(original_image)
for pixel in original_image:
x, y, (r, g, b) = pixel
red = create_color(r, 0, 0)
set_color(red_filter, x, y, red)
return red_filter
def blue_channel(inpic) -> Image:
"""Returns a copy of the inputed image with only bluescale pixels.
written by Yahya Shah
>>>blue_channel(image)
image with all pixels blue
"""
pic = copy(inpic)
for i, m, (r, g, b) in pic:
blue = create_color(0, 0, b)
set_color(pic, i, m, blue)
return pic
def grayscale_from_blue(image: Image) -> Image:
"""Return a grayscale copy of image. Each pixel's blue component provides
the RGB components for the corresponding gray shade.
>>> image = load_image(choose_file())
>>> gray_image = grayscale_from_blue(image)
>>> show(gray_image)
"""
new_image = copy(image)
for x, y, (r, g, b) in image:
gray = create_color(b, b, b)
set_color(new_image, x, y, gray)
return new_image
def red_channel(image: Image) -> Image:
"""Return a red filtered copy of image; that is, an image that is showing only the red color of the original image.
>>> image = load_image(choose_file())
>>> inverted = invert(image)
>>> show(inverted)
"""
new_image = copy(image)
# filter the intensities of every component in every pixel.
for x, y, (r, g, b) in image:
red = create_color(r, 0, 0)
set_color(new_image, x, y, red)
return new_image
def red_channel(image: Image) -> Image:
"""Returns a copy of an image with only redscale pixels.
*written by Sam Hurd*
>>>red_channel(image)
image with all pixels red
"""
new_image = copy(image)
for x, y, (r, g, b) in new_image:
red = create_color(r, 0, 0)
set_color(new_image, x, y, red)
return new_image
def detect_edges_better (image:Image, threshold: float) -> Image:
""" Author: Benjamin Richards
Type Annotations: Cimpl.Image, float -> Cimpl.Image
This function tries to find the edges of a given image by going through
every pixel and checking its brightness with the one below and to the right
of it. That difference is compared with a given threshold value. In other
words the function will produce a black and white version of the image where
the background is white and the main parts of the image is black.
>>> new_image= detect_edge_better(copied_image,10)
>>> show(new_image)
(Shows the new black and white image generated by detecting edges)
"""
new_image = copy(image)
# Constants
WIDTH = new_image.get_width()
HEIGHT = new_image.get_height()
BACK = (255,255,255)
EDGE = (0,0,0)
for x in range (WIDTH):
for y in range (HEIGHT):
r,g,b = get_color(new_image,x,y)
brightness = (r+g+b)/3
# The default colour value is set to BACK (white). This value later
# Can change to EDGE (black) if the difference exceeds the threshold
new_colour = create_color(BACK[0],BACK[1],BACK[2])
if y != HEIGHT-1 and x != WIDTH -1:
# Makes sure the range doesn't exceed the height and the width
# Calculates the brightness of the pixel below it
r_down,g_down,b_down = get_color(new_image,x,y+1)
brightness_down = (r_down+g_down+b_down)/3
r_right,g_right,b_right=get_color(new_image,x+1,y)
brightness_right = (r_right+g_right+b_right)/3
# Checks to see if the difference between the brightness values
# Exceeds the threshold and if so converts it to black
if (abs(brightness-brightness_down) > threshold or
abs(brightness-brightness_right) > threshold):
new_colour= create_color (EDGE[0],EDGE[1],EDGE[2])
set_color(new_image, x, y, new_colour)
return new_image
def green_channel(original_image: Image) -> Image:
""" Developed by Karandev Andotra, 101141882
Return a filtered image from a user-selected original image.
RBG code (0,g,0) where g is the original green pixel value.
>>> green_channel(original_image)
"""
new_image = copy(original_image)
for pixel in original_image:
x, y, (r, g, b) = pixel
new_color = create_color(0, g, 0)
set_color(new_image, x, y, new_color)
return new_image
def red_channel(image:Image) -> Image:
'''Return a copy of the provided image that is completley red, (r,0,0).
Each pixel of the image must be red
>>> image = load_image(choose_file())
>>> red_image = red_channel(image)
>>> show(red_image)
'''
new_image = copy(image)
for pixel in image:
x, y, (r, g, b) = pixel
red = create_color(r,0,0)
set_color(new_image, x, y, red)
return new_image
def blue_channel(image:Image) -> Image:
'''Return a copy of the provided image that is completley blue, (0,0,b).
Each pixel of the image must be blue.
>>> image = load_image(choose_file())
>>> blue_image = blue_channel(image)
>>> show(blue_image)
'''
new_image = copy(image)
for pixel in image:
x, y, (r, g, b) = pixel
green = create_color(0,0,b)
set_color(new_image, x, y, green)
return new_image
def green_channel(image:Image) -> Image:
'''Return a copy of the provided image that is completley green, (0,g,0).
Each pixel of the image must be green
>>> image = load_image(choose_file())
>>> green_image = green_channel(image)
>>> show(green_image)
'''
new_image = copy(image)
for pixel in image:
x, y, (r, g, b) = pixel
green = create_color(0,g,0)
set_color(new_image, x, y, green)
return new_image
def two_tone(image: Image, colour1: str, colour2: str) -> Image:
'''
Function Name: two_tone
Author: Mohamed Kaddour 101140829
'''
'''Returns a filtered image consisting of the two colours passed in as
strings from a list of colors:
black
white
red
lime
yellow
cyan
magenta
gray
>>> two_tone(filename, "red", "blue")
-> Displays proper image.
>>> two_tone(filename, "green", "purple")
-> Displays incorrect image.
'''
colours = {
'black': (0, 0, 0),
'white': (255, 255, 255),
'red': (255, 0, 0),
'lime': (0, 255, 0),
'blue': (0, 0, 255),
'yellow': (255, 255, 0),
'cyan': (0, 255, 255),
'magenta': (255, 0, 255),
'gray': (128, 128, 128)
}
new_image = copy(image)
new_colour = create_color(0, 0, 0)
rgb = (0, 0, 0)
for pixel in image:
x, y, (r, g, b) = pixel
avg = (r + b + g) / 3
if 0 <= avg <= 127:
rgb = colours[colour1]
new_colour = create_color(rgb[0], rgb[1], rgb[2])
set_color(new_image, x, y, new_colour)
elif 128 <= avg <= 255:
rgb = colours[colour2]
new_colour = create_color(rgb[0], rgb[1], rgb[2])
set_color(new_image, x, y, new_colour)
return new_image
def blue_channel(original_image: Image) -> Image:
""" Developed by Hussein Rashid, 101141962
Return a filtered image from a user-selected original image.
RBG code (0,0,b) where b is the original blue pixel value.
>>> blue_channel(original_image)
"""
new_image = copy(original_image)
for pixel in original_image:
x, y, (r, g, b) = pixel
new_color = create_color(0, 0, b)
set_color(new_image, x, y, new_color)
return new_image
def red_channel(original_image: Image) -> Image:
""" Developed by Ahmed Abdellah, 101163588
Return a filtered image from a user-selected original image.
RBG code (r,0,0) where r is the original red pixel value.
>>> red_channel(original_image)
"""
new_image = copy(original_image)
for pixel in original_image:
x, y, (r, g, b) = pixel
new_color = create_color(r, 0, 0)
set_color(new_image, x, y, new_color)
return new_image
def detect_edges_better(original_image: Image, threshold: float) -> Image:
"""Returns an image that looks like a pencil sketch of the original image,
changing the pixels' colors to black or white.
- Function written by Leanne Matamoros - 101147405
>>> imp_edge(original_image, 15)
<Cimpl.Image object at 0x000002096DEEA148>
"""
edges_copy = copy(original_image)
width = get_width(edges_copy)
height = get_height(edges_copy)
for x in range(width):
for y in range(height):
r, g, b = get_color(edges_copy, x, y)
brightness = (r + g + b) / 3
if y != (height - 1):
r1, g1, b1 = get_color(edges_copy, x, (y + 1))
brightness1 = (r1 + g1 + b1) / 3
if x != (width - 1):
r2, g2, b2 = get_color(edges_copy, (x + 1), y)
brightness2 = (r2 + g2 + b2) / 3
black = create_color(0, 0, 0)
white = create_color(255, 255, 255)
if x == (width - 1) and y == (height - 1):
set_color(edges_copy, x, y, white)
elif x != (width - 1) or y != (height - 1):
if abs(brightness - brightness1) > threshold or abs(
brightness - brightness2) > threshold:
set_color(edges_copy, x, y, black)
elif abs(brightness - brightness1) < threshold or abs(
brightness
- brightness2) < threshold:
set_color(edges_copy, x, y, white)
elif x == (width - 1):
if abs(brightness - brightness1) > threshold:
set_color(edges_copy, x, y, black)
elif abs(brightness - brightness1) < threshold:
set_color(edges_copy, x, y, white)
def invert(image: Image) -> Image:
"""Return an inverted copy of image; that is, an image that is a colour
negative of the original image.
>>> image = load_image(choose_file())
>>> inverted = invert(image)
>>> show(inverted)
"""
new_image = copy(image)
# Invert the intensities of every component in every pixel.
for x, y, (r, g, b) in image:
inverted = create_color(255 - r, 255 - g, 255 - b)
set_color(new_image, x, y, inverted)
return new_image
