Image Processing
Announcements
What’s an image?
Images as functions
What’s a digital image?
Image processing
Noise
Reducing Noise
Mean filtering
Mean filtering
What about border pixels?
Effect of filter size
Weighted average
filtering
Gaussian filter
Comparison of mean vs.
gaussian filter
Linear shift-invariant
filters
Cross correlation
Linear shift-invariant
filters
Symmetry in Convolutions
Median filter
Slide 21
Slide 22
Image Scaling
Image sub-sampling
Even worse for synthetic
images
Sampling and the Nyquist
rate
Subsampling with Gaussian
pre-filtering
Some times we want many
resolutions
Gaussian pyramid
construction
Image resampling
Image resampling
Image resampling
Image resampling
Subsampling with bilinear
pre-filtering
Things to take away from
this lecture