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: |
(1) Angular Second Moment, |
Algorithm taken from: |
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. |
pgm(5), pnmcut(1) |
Copyright (C) 1991 by Texas Agricultural Experiment Station, employer for hire of James Darrell McCauley. |