Thread View: comp.lang.idl-pvwave
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Started by pdj@boulder.Colo
Wed, 14 Nov 1990 06:04
Multi-Spectral image analysis procedures & data available via ftp
Author: pdj@boulder.Colo
Date: Wed, 14 Nov 1990 06:04
Date: Wed, 14 Nov 1990 06:04
48 lines
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A set of idl/pv-wave procedures for analyzing multi-spectral images is available by anonymous ftp from boulder.Colorado.EDU (128.138.240.1). There is also a compressed file containing the first 128 bands of a 224 band subscene of Mountain View CA near Moffett Field. The files are called pub/cube.tar.Z - about 58KB, compressed tar file - about 175K when uncompressed and pub/cube.data1.Z - about 2.9MB, compressed image file - about 5 MB when uncompressed respectively. The cube.tar file is a tar archive of two directories of idl/pv-wave procedures plus one C routine used to check for an ISIS/Qlook image header. Manual pages and detailed documentation are also included. It was originally written for a remote sensing class taught by Dr. Alexander Goetz for a lab in supervised classification, and allows easy display of spatial and spectral data from an array of images taken in different wavelengths. It also can serve as a good basis for extensions to other classification techniques or analysis programs. It runs in both 8 and 24 bit color environments. These procedures are being distributed with no support promised or implied. Any comments, problems, bug fixes, or enhancements are welcome, however, and should be sent to the email address below. The cube.data1 file has a 2048 byte ascii header (ISIS format) followed by 128 images (bands) of 256 samples by 150 lines of unsigned bytes. The remaining 96 bands are available on request. The ascii header describes the full 224 band subscene, hence the cube program must be called to process only bands from the first 128: WAVE> cube, 'cube.data1', 1+indgen(128) The cube.data1 file covers the wavelength region of .4 to 1.64 micrometers in 128 bands approximately .0098 micrometers apart. The image was taken by the AVIRIS (Airborne Visible Infra-Red Imaging Spectrometer) sensor flown by a JPL aircraft. Paul D. Jensen pdj%gandalf@boulder.Colorado.EDU 2225 Mariposa Ave Boulder, CO 80302 303 449-7029
Re: Multi-Spectral image analysis procedures & data available via ftp
Author: wschen@zsazsa.us
Date: Mon, 03 Dec 1990 02:15
Date: Mon, 03 Dec 1990 02:15
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I am very interested in multi-spectral processing. I got these two programs through network. Thank you ! However, I did not have the "P-wave" software in order to convert cube.data1 into a normal binary files. Can you tell me the structure of "cube.data1" ? Then I can write a C program to convert to the file type what I want. Or mail me another file format which I do'nt need the "P-wave". I thank you in advance. ---------------------------------------- | University of Southern California | | Department of Electrical Engineering| | Communication Science Institute | | | | Sincerely yours, | | Waisheou Chen | ----------------------------------------
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