Part 1.1: Warmup
I chose to sharpen the apple image. I first computed the high-frequency components of the image with a high-pass filter (a Gaussian
filter subtracted from the impulse filter). Then I added the high-frequency components back to the image, scaled by a factor of 0.8.
The factor of 0.8 was determined by trial-and-error. The final filter was
f + 0.8(f - f*G)
Unsharpened
Sharpened
