thm.rectify

Contents: Description, Arguments, Usage, Examples, Images, Related Functions Supported Under Version: > 2.10 Current Davinci Version: 2.27 64-bit Safe: Yes Description Rotates and slants a geometrically projected THEMIS cube to minimize the black space and prepare the data for thm.deplaid. The image is first rotated to make a designated line of the image parallel with the x axis and then the left edge of the data is pixel shifted over to the y axis. This results in some reversible spatial distortion depending on the projection. This process is reversed with thm.reconstitute. Located in "thm" module Arguments and Return Values Input: geometrically projected THEMIS cubes of at most 10 bands of type byte, short, int or float. Output: a davinci structure containing the elements angle, leftedge and data Usage Syntax: thm.rectify(obj = VAL [, ignore = VAL] [, trust = FLOAT] [, force = 1]) obj - a geometrically projected THEMIS cube ignore - the value in non-data pixels of the projected cube. Default is -3.402822655e+38. trust - location in the image the angle should be determined. 0 = top, 1 = bottom, .25 = 25 percent down the image, etc. Default is 0 (top). force - forces rectify() to use an ignore value even if it complains. Default is 0. TROUBLESHOOTING The ignore value will ALWAYS be set to -32768 when rectifying! Rectify checks for appropriate ignore value before running. You can override ignore value warning by setting force = 1 Examples dv> a 1356x7100x10 array of float, bsq format [385,104,000 bytes] dv> b = thm.rectify(obj=a) struct, 4 elements angle: 3.33555 data: 345x7179x10 array of float, bsq format [99,070,200 bytes] leftedge: 1x7179x1 array of int, bsq format [28,716 bytes] width: 1356 dv> b = thm.rectify(a) struct, 4 elements angle: 3.33555 data: 345x7179x10 array of float, bsq format [99,070,200 bytes] leftedge: 1x7179x1 array of int, bsq format [28,716 bytes] width: 1356 dv> b = thm.rectify(obj=a,ignore=0,trust=2,force=1) struct, 4 elements angle: 3.33555 data: 345x7179x10 array of float, bsq format [99,070,200 bytes] leftedge: 1x7179x1 array of int, bsq format [28,716 bytes] width: 1356 Images

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 Related Functions thm.reconstitute rotate thm.deplaid Recent Core Changes Change Log Modified On: 01-16-2013