PPMA_IO
Read or write an ASCII PPM file.

PPMA_IO is a set of MATLAB M files which can read or write a PPMA (Portable Pixel Map ASCII) file, involving 3 NROW by NCOL integer arrays of RGB color information.

There are many graphics programs, such as XV and GIMP, that can display images in this formats, or translate them to other formats such as BMP, GIF, JPEG, MacPaint, X Window, and so on.

Related Data and Programs:

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

PGMA_IO is a MATLAB library which handles the Portable Gray Map format.

PPMA_IO is also available in a C++ version and a FORTRAN90 version

Reference:

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

Source Code:

• ppma_example.m, a function that creates a set of RGB color data.
• ppma_read.m, a function that reads an ASCII PPM file.
• ppma_write.m, a function that writes an ASCII PPM file.
• ppma_write_test.m, sets up an example and writes it to a file.

Examples and Tests:

• ppma_io_test.m calls all the tests.
• ppma_io_test.out the output of the tests.
• timestamp.m prints the current YMDHMS date as a timestamp.
• ppma_io_test01.m tests PPMA_EXAMPLE and PPMA_WRITE.
• ppma_io_test02.m tests PPMA_READ.

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