File:Correlation.png

Correlation.png(775 × 452 pixels, file size: 82 KB, MIME type: image/png)

Match filter based on the correlation surface. Starting from an approximate alignment (e.g. affine), for each vertex of the spring mesh, an offset is searched calculating the PMCC coefficient r of a block at all possible x,y translations in a given local vicinity over the overlapping image. The above windows display six examples of such correlation surfaces for translations in a square region with the origin in the middle. The PMCC coefficnet r is grey-coded in the range from -0.7 to 0.7. The candidate for the translational offset is the translation with maximal r. Candidates are rejected if either r was too low (not similar), there was more than one maximum with very similar r (ambiguous), the maximum is not well localized in both dimensions (an edge pattern that fits everywhere alongside the edge).

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current11:05, 11 March 2011Thumbnail for version as of 11:05, 11 March 2011775 × 452 (82 KB)Axtimwalde (talk | contribs)Match filter based on the correlation surface. Starting from an approximate alignment (e.g. affine), for each vertex of the spring mesh, an offset is searched calculating the [[http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient|P
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