PGMA_IO
Read or write an ASCII PGM file.

PGMA_IO is a MATLAB library which reads or writes a PGMA (Portable Gray Map ASCII) file, involving an NROW by NCOL integer array containing gray scale information.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Related Data and Programs:

PBMA_IO is a MATLAB library which handles the Portable Bit Map format.

PGMA is a data directory which contains examples of PGMA files.

PGMA_IO is available in a C++ version and a FORTRAN90 version and a MATLAB version.

PGMA_TO_PGMB is an executable C++ program which converts an ASCII PGM file to a binary PGM file.

PGMB_TO_PGMA is an executable C++ program which converts a binary PGM file to an ASCII PGM file.

PPMA_IO is a MATLAB library which handles the Portable Pixel Map format.

1. the PGMA Data page.
2. the NETPBM homepage.

Source Code:

• pgma_example.m, a function that creates a set of grayscale data.
• pgma_read.m, a function that reads an ASCII PGM file.
• pgma_write.m, a function that writes an ASCII PGM file.
• pgma_write.m, tests the writes routine for writing an ASCII PGM file.
• timestamp.m prints the YMDHMS date as a timestamp.

Examples and Tests:

• pgma_io_test.m runs the tests.
• pgma_io_test_output.txt the output file.
• pgma_io_test01.m, tests PGMA_WRITE.
• pgma_io_test02.m, tests PGMA_READ.
• pgma_io_test03.m, creates a grayscale with nicely graded bands.

You can go up one level to the MATLAB source codes.