User Manual - pancroma

You must be careful when selecting the input parameters, as your choice willhave affect both the quality of the computed image and the processing time (thehigher the quality, the greater the time). For example, increasing the size of theSearch Extents increases the number of candidate pixels for the comparisoncomputation.In general, the larger the value of the Search Extents, the better the pixelinterpolation. However, choosing a large Search Extents value will rapidly bogdown computational speeds, as the extents must be searched for each gap pixelin the image, plus the black collar pixels as there is no way to distinguishbetween a black gap pixel and a black collar pixel. Choosing too small of awindow will result in failure to find any matching pixels. (The optimumcombination of Search Extents and Threshold cannot be computed and must bedetermined empirically.)Although the algorithm has been streamlined for computational speed, whateverthe size of the Search Extents, the Hayes method will be slower to process thanthe Transfer method.331