User Manual - pancroma

58. Resizing an Image by an Integer Multiple________________________________________________________________Sometimes it is beneficial to reduce the size of a grayscale image. For example,it is not practical to include a 250MB pan sharpened image into a presentationslide or a report. PANCROMA TM provides a utility to reduce the file size (andcorrespondingly the resolution) of an input grayscale image. This is sometimescalled ‘resampling’ because the algorithm samples every other pixel, or everyfourth pixel, etc. and then recombines the sampled pixels into a new image.In order to use this utility, load a single grayscale band or pan file image asdescribed in the previous section. Check the ‘Resample Grayscale Image’ checkbox and then select ‘Display Files’ and then ‘Display Single Grayscale Image’ asin the previous section. You will be presented with a dialog box asking you tospecify the resampling factor. A factor of ‘2’ reduces the row and column countby ½; a factor of ‘4’ by ¼, etc. After producing the reduced image, you can saveit by selecting ‘File’ | ‘Save’ and then either .jpg or .bmp format as describedpreviously.167