matlab.rar_Speckle matlab_speckle removal_合成孔径雷达_斑点噪声MATLAB_雷达

MATLAB utilities for the BYU-MERS "SIR" image format The BYU-MERS "sir" image format was developed by the Brigham Young University (BYU) Microwave Earth Remote Sensing (MERS) research group as part of the NASA Scatterometer Climate Record Pathfinder (SCP) project to store remotely sensed images of the earth used for climate studies, among other purposes. The file format stores an image array of floating point values along with the information required to earth-locate the image pixels. Additional information on the applications, file format, and available data can be obtained from the NASA-sponsored Scatterometer Climate Record Pathfinder web site http://www.scp.byu.edu/ and/or the NASA/JPL PO.DAAC http://podaac.jpl.nasa.gov/ Files in this directory are useful for reading SIR files into matlab and locating pixels. Use loadsir.m to load the file into memory. The routine pix2latlon.m computes the lat/lon position given a list of x,y pixel locations. latlong2pix does the reverse. showsir and viewsir are utilities to display SIR images. Note that these routines use the SIR-standard pixel address from 1 to N. Note that (1,1) is in the lower left of the image of a SIR File. For an input location of pixel (1,1) the Lat,Lon values returned by pix2latlon correspond2 to the location of the lower-left corner of the (1,1)th pixel. For convenience, matlab-reported values are "flipped" vertically to the matlab convention. The matlab routine viewsir.m provides a fancy window utility to read a SIR file and display to screen. The utility includes zoom and point/click to get value and location. Main routines: (version 3.0 SIR format) loadsir.m loads image and header information into matlab loadpartsir.m loads part of image and header information into matlab printsirhead.m prints out the header information from loadsir pix2latlon.m given a pixel location, compute lat and lon latlon2pix.m compute pixel location given lat and lon sirheadtext.m modifies text fields of sir header before write writesir.m writes sir format file Geometry and Support routines: easegrid.m forward EASE grid transformation ieasegrid.m inverse EASE grid transformation ilambert1.m inverse Lambert grid transformation ipolster.m inverse polar stereographic grid transformation lambert1.m forward Lambert grid transformation mod.m compute modulo function polster.m forward polar stereographic grid transformation Other files: Contents.m Matlab help file readme_matlab.txt this file scaleimage.m utility to scale image for display showsir.m simplified display routine for sir image viewsir.m function interface for viewsir1.m to display SIR image viewsir1.m called by viewsir sircolorbar.m callled by viewsir1 sir_locate.m interactively select a point on image and print location setsirhead.m set particular values in sir header by name sirheadvalue.m get particular values in sir header by name sirheadtext.m set text values in sir header display_head.m help routine for sirheadvalue Note: when using writesir it is recommended that the header from an existing SIR file be used at a template and only the changed fields modified. If you have any questions, please contact the SCP. ============================================================================== Dr. David G. Long [email protected] Director, BYU Center for Remote Sensing http://www.cers.byu.edu/ Professor, Electrical and Computer Eng. Dept. http://www.ee.byu.edu/ Brigham Young University http://www.byu.edu/ 459 Clyde Building voice: 801-422-4383 Provo, Utah 84602 fax: 801-422-0201 Microwave Earth Remote Sensing (MERS) Lab: http://www.mers.byu.edu/ Scatterometer Climate Record Pathfinder: http://www.scp.byu.edu/ ============================================================================== Last revised: 25 Apr 2003 DGL (c) 1997, 1998, 1999, 2000, 2002, 2003 BYU MERS