Re: how to read images-files

[Etienne Grossmann]

  Hello,

Ariel Tankus (http://www.math.tau.ac.il/~arielt/misc.html) wrote some
image i/o functions, amongst which the following :
======================================================================
octave:20> help readimagefile
readimagefile is the user-defined function from the file
/home/etienne/prog/octave/mylib/octave-mylib/tools/imgio/readimagefile.m

[im, isPpm, maxval] = readimagefile(fname, force_gray)

fname      : string : name of image file.
force_gray : flag   : (opt) if true, the returned image is a gray level
                      image, even if the file contained a color image.
                      (default: false) 
im         : matrix : an image.  Note, that if force_gray == false, the
                      image might by a PPM representation of the image.
isPpm      : flag   : 1 : `im' is in PPM format.
                      0 : `im' is a graylevel matrix.
maxval     : int    : Maximum luminosity level (usually 255)

See also: readpnm, readfi, readjpg, readgif, splitppm.

readimagefile    Read an image file of any supported image format.
                 The currently supported formats are:
                 PGM/PPM (both ascii and binary), FI, JFIF, IMG and GIF.
======================================================================

I added some ugly wrapping and put it on my homepage
(http://anonimo.local/~etienne/octave). 

  Cheers,

  Etienne


On Mon, Feb 18, 2002 at 07:16:30PM +0900, Edgar Martinez wrote:
# hello,
# 
# I am using octave under linux(kondara).
# does somebody know how to load any kind of image in *.m programs?
# mainly jpg, ps, gif, or ppm, even any other is ok!
# 
# the way how to save them doesnt care, because i can be saved in octave 
# format.
# (in the future it will easier to read)
# 
# I want to manipulate images into simple 2D arrays.
# 
# if some body has any suggestion, thanks in advance
# 
# EddY
# 
# 
# 
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-- 
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne



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