pgmtexture(1) | General Commands Manual | pgmtexture(1) |
pgmtexture - calculate textural features on a portable graymap
pgmtexture [-d d] [pgmfile]
Reads a portable graymap as input. Calculates textural features based on spatial dependence matrices at 0, 45, 90, and 135 degrees for a distance d (default = 1). Textural features include:
Algorithm taken from:
Haralick, R.M., K. Shanmugam, and I. Dinstein. 1973. Textural features for
image classification. IEEE Transactions on Systems, Man, and
Cybertinetics, SMC-3(6):610-621.
The program can run incredibly slow for large images (larger than 64 x 64) and command line options are limited. The method for finding (14) the maximal correlation coefficient, which requires finding the second largest eigenvalue of a matrix Q, does not always converge.
IEEE Transactions on Systems, Man, and Cybertinetics, SMC-3(6):610-621.
Copyright (C) 1991 by Texas Agricultural Experiment Station, employer for hire of James Darrell McCauley.
22 Aug 1991 |