Experiment 4: precision

Problem of sampling of the images: they are not sampled to Shannon frequency
$\rightarrow$ Precision of registration by correlation affected by aliasing Subsampling of a factor 1/10th 
Error of translation $< 0.2$ pixel,
often $<0.1$ pixel
Summer School on Mathematical Problems in Image Processing, Trieste, Italy, September 4th-18th 2000