PPMA_IO
Read or write an ASCII PPM file.

PPMA_IO is a MATLAB library which can read or write an ASCII PPM (Portable Pixel Map) 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.

Licensing:

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

Languages:

PPMA_IO is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

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

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

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.
• timestamp.m prints the current YMDHMS date as a timestamp.

Examples and Tests:

• ppma_io_test.m calls all the tests.
• ppma_io_test_output.txt the output file.
• ppma_io_test01.m tests PPMA_EXAMPLE and PPMA_WRITE.
• ppma_io_test02.m tests PPMA_READ.
• test01.ascii.ppm, the ASCII PPM file from test 1.
• test01.png, a PNG version of the file.
• test02.ascii.ppm, the ASCII PPM file from test 2.
• test02.png, a PNG version of the file.

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