overlay

Contents: Description, Arguments, Usage, Examples, Images, Sub-Functions, Related Functions, Source Supported Under Version: >1.00 Current .dvrc Version: 1.02 Description Overlay image 2 on image 1 (must be the same dimensions) or blend the two images together. Uses thm.ramp for blending Arguments and Return Values Arguments: two numeric arrays Return Value: an overlayed numeric array Usage Syntax: overlay(img1, img2 [, ignore = VAL][, blend = VAL]) img1 = underlying image img2 = overlaying image ignore = ignore value of the images (Default=-32768) blend = blend two images together (Default=1) Examples Set up the arrays to be used in examples dv> a = clone(-32768.,1000,1000,1) 1000x1000x1 array of float, bsq format [4,000,000 bytes] dv> b = clone(-32768.,1000,1000,1) 1000x1000x1 array of float, bsq format [4,000,000 bytes] dv> a[200:500,200:500] = 100 301x301x1 array of float, bsq format [362,404 bytes] dv> b[400:800,400:800] = 200 401x401x1 array of float, bsq format [643,204 bytes] Example 1 - non-blended dv> out = overlay(a,b, blend = 0, ignore = -32768) 1000x1000x1 array of short, bsq format [2,000,000 bytes] Example 2 - blended dv> out = overlay(a,b, ignore = -32768) 1000x1000x1 array of short, bsq format [2,000,000 bytes] Images Example 1 - non-blended, Example 2 - blended

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 thm.ramp format Related Functions blend blendx data_manipulation.dvrc overlay() Recent Library Changes Change Log Created On: 04-20-2007 Modified On: 01-17-2008