Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
destripping satellite imagery - quest and/or problem
Hi all, I have some multi channel high resolution satellite data from the Japanese Earth Resource Satellite (JERS-1) that has horizonal stripping every 3 lines. I.e., lines 1 + 4 + 7 + 10 ... have the same darker conntrast when compared to lines 2 + 5 + 8 and 3 + 6 + 9. This is a documented problem with the VNIR sensor on JERS-1. ENVI has a destripping routine under Utility/Preprocessing/GenPurpose called DESTRIPE which seems to be exactly what i need, in definition at least. However, it produced no desireable destripping on the imagery. The number of detectors in the DESTRIPE menu was to 3 (as it shoud be) and various other numbers with no no luck. I even tried using a small (400x400) single channel subimage, the original arrays are huge. Is the DESTRIPE routine effective for vertical stripping (Landsat) and not intended for horizontal stripping like I have? I can remove the stripping by apply either a low pass or median but that just smooths the images reducing the resolution as expected. Here's a sample 200x200 JPEG of the stripping ftp://kestrel.umd.edu/pub/wxsat/incoming/stripe.jpg Any pointers would be greatly appreciated. Thanks, Scott gennari@Hawaii.Edu ------------------------------------------------------------ ------ University of Hawaii voice (808) 956 5392 Dept. of Information & Computer Sciences fax (808) 956 9399 2565 The Mall, Keller 304A Honolulu, HI 96822 email gennari@Hawaii.Edu