ppan2ppm

Synopsis

Description

ppan2ppm converts the Pandore file im_in to the PPM file format im_out.

A PPM consists of the followings:

• The first line contains the "magic number" among:
  • P2: for gray scale image with ASCII data.
  • P5: for gray scale image with pure binary data.
  • P3: for color image with ASCII data.
  • P6: for color image with pure binary data.
• The second line contains the number of columns and rows in ASCII.
• The third line contains the number of colors.

  Each line can include comments introduced by #.

• The data format depends on the magic number: (Caution: no line should be longer than 70 characters.)
  • P2: pixel is represented as an ASCII decimal number.
  • P5: pixel is represented as 1 byte.
  • P3: pixel is represented as a triplet of ASCII decimal number (Red, Green Blue).
  • P6: pixel is represented as a triplet of bytes (Red, Green Blue).

Example:

P2
#Gray scale image
#with 5 columns and 5 rows.
5 4
255
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5

Inputs

• im_in: a Pandore image file.

Outputs

• im_out: a PPM (color) image file or PGM (gray level) image file.

Result

Returns SUCCESS or FAILURE.

Examples

• Convert the tangram to ppm image.

     ppan2ppm tangram.pan tangram.ppm
  

See also

C++ prototype