Question

Filter: Flipping an Image Horizontally This filter should be developed by the same pair that developed flip_vertical. Define a filter named flip_horizontal that that is passed an image and returns a horizontally flipped copy of that image. You should be able to reuse much of the code from the flip_vertical filter as well as its test function.

coding in python, using cimpl

Answer 1

Points to consider:

1. For flipping the image horizontally, we need to change the coordinates (x,y) to (width-x+1, y)
2. Then we need to display each pixel

Code

from PIL import Image, ImageDraw

# Load image:
original_image = Image.open("image.png")
input_pixels = original_image.load()

# Create output image
final_image = Image.new("RGB", original_image.size)
draw = ImageDraw.Draw(final_image)

# Copy pixels
for x in range(final_image.width):
    for y in range(final_image.height):
        xp = original_image.width - x - 1
        draw.point((x, y), input_pixels[xp, y])

final_image.save("final.png")

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