Returns True after converting the image to monochrome.
All plug-in functions must return True or False. This function returns True because it modifies the image. It converts the image to either greyscale or sepia tone, depending on the parameter sepia.
If sepia is False, then this function uses greyscale. For each pixel, it computes the overall brightness, defined as
0.3 * red + 0.6 * green + 0.1 * blue.
It then sets all three color components of the pixel to that value. The alpha value should remain untouched.
If sepia is True, it makes the same computations as before but sets green to 0.6 * brightness and blue to 0.4 * brightness.
Parameter image: The image buffer
Precondition: image is a 2d table of RGB objects
Parameter sepia: Whether to use sepia tone instead of greyscale
Precondition: sepia is a bool
# We recommend enforcing the precondition for sepia
# Change this to return True when the function is implemented
height = len(image)
width = len(image)
for row in range(height):
for col in range(width):
pixel = image[row][col]
pixel.red = int(0 * 0.3)
pixel.green = int(1*0.6)
pixel.red = int(2*0.1)