do coreg2

Contents: Description, Arguments, Usage, Sub-Functions, Related Functions, Source Supported Under Version: >1.00 Current .dvrc Version: 1.03 Description Calculate the x and y offset values needed to coregister two v_objects. do_coreg2() differs from do_coreg in that it uses a different coregistration algorithm. do_coreg2() allow the user to search up to several hundred pixels. Arguments and Return Values Arguments: A source and destination v-object and ignore value, a search radius and a speed factor Return Value: A 2x1x1 array with x and y coregistration values. The source v-object .x and .y values are changed. Usage Syntax: do_coreg2(src, dst [, ignore = VAL] [, search = INT] [, factor = INT]) 'src' is a v-object created by v_make, containing the image you wish to add to the destination image. 'dst' is a v-object created by v_make, containing the image to which the 'src' image will be added. 'ignore' is the non-valid data value in the v_objects. Default is -32768. 'search' is the maximum number of pixels in x and y to search for the best coregistration value. 'factor' is a number designating the speed of the search. By picking a 'factor' number the user is telling the algorithm to use only points from every factor number of points. For example: 'factor = 100' tells the algorithm to use every 100th line in the calculation of coregistration. This significantly speeds up operation but significantly decreases signal to noise which is very important in determining the exact best coregistration value. In general, a 'factor' value should be on the same order as the 'search' value.

DavinciWiki Mini-Nav Bar Contents Functions Function Categories Common Procedures Glossary Download Davinci Change Log News Mailing List Contact Developers davinci-dev [AT] mars.asu.edu All other topics See navigation on the left Major Sub-Functions v_intersect v_cut Related Functions do_coreg mosaic_tools.dvrc do_coreg2() Recent Library Changes Change Log Created On: 02-15-2006 Modified On: 05-14-2013