Reading in a bitmap and getting RGB values

steve

I am trying to use ANSI C to read in a bitmap and for each x,y value
get a value for the R, G, and B channels. What would be the best way
to go about this? I had some code working but it would not work for
images larger than 640x480 it would just crash. I have tried using the
Microsoft bmp.c/bmp.h code as well as something called ImageFmtc.c/
ImageFmtc.h and either receive unexpected results or program crashes
on large images.

Thanks for the advise/help on the topic!

Aug 13 '08 #1

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Malcolm McLean

"steve" <St******************@gmail.comwrote in message news

>I am trying to use ANSI C to read in a bitmap and for each x,y value
get a value for the R, G, and B channels. What would be the best way
to go about this? I had some code working but it would not work for
images larger than 640x480 it would just crash. I have tried using the
Microsoft bmp.c/bmp.h code as well as something called ImageFmtc.c/
ImageFmtc.h and either receive unexpected results or program crashes
on large images.

Go to my website. Under Basic Algorithms there are readers / writers for
BMP. GIF and JPEG formats.
Any computer will run out of memory if images are big enough. However in
this day and age 480*640 shouldn't be a problem, unless you have a really
old computer / compiler.

--
Free games and programming goodies.
http://www.personal.leeds.ac.uk/~bgy1mm

Aug 13 '08 #2

adam majewski

steve pisze:

I am trying to use ANSI C to read in a bitmap and for each x,y value
get a value for the R, G, and B channels. What would be the best way
to go about this? I had some code working but it would not work for
images larger than 640x480 it would just crash. I have tried using the
Microsoft bmp.c/bmp.h code as well as something called ImageFmtc.c/
ImageFmtc.h and either receive unexpected results or program crashes
on large images.

Thanks for the advise/help on the topic!

http://local.wasp.uwa.edu.au/~pbourke/dataformats/bmp/

http://entropymine.com/jason/bmpsuite/
http://fraktal.republika.pl/g_file.html

What do you think about PPM file ?

HTH

Adam

Aug 15 '08 #3

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