Images and Transformations

Reading

What is an image?

Images as functions

What is a digital image?

Image transformations

Image processing

Linear image transforms

Linear image transforms

Linear image transforms

Linear image transforms

Linear shift-invariant filters

2D linear transforms

2D filtering

Noise

Mean filtering

Slide 17

Mean filtering

Effect of mean filters

Mean kernel

Gaussian Filtering

Mean vs. Gaussian filtering

Convolution

Convolution theorems

2D convolution theorem example

Median filters

Comparison: salt and pepper noise

Comparison: Gaussian noise