Image Sampling

Image Scaling

Image sub-sampling

Image sub-sampling

Even worse for synthetic images

Sampling and the Nyquist rate

2D example

Subsampling with Gaussian pre-filtering

Subsampling with Gaussian pre-filtering

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Slide 11

Subsampling with Gaussian pre-filtering

Some times we want many resolutions

Gaussian pyramid construction

Image resampling

Image resampling

Image resampling

Resampling filters

Bilinear interpolation