[Date Index] [Thread Index] [Author Index]
Re: importing images
Al Arduengo wrote: > > Greetings everyone, > > I am trying to utilize Mma 3.0 in my Image Processing course and have > run into a bit of a snag. It seems that it can DISPLAY many forms of > graphics, but I wish to be able to, say, import a 8-bit grayscale *.gif > file into mma as a matrix of grayscale values. The same would apply to > jpeg, tiff, and bmp files as well. Has anyone done this or is there a > kind soul who could shed some light on this subject for me? Thanks in > advance. > > -- > Al Arduengo > exal at texas.net > http://lonestar.texas.net/~exal > 1:387/310.4 > > -----BEGIN GEEK CODE BLOCK----- > Version: 3.1 > GE d(-) s: a C++ UL+++>$ P+ L++ E+>$ W++ N++ o? K--? w>$ !O---- > !M-- !V PS+ PE+ !Y+ PGP+ t+ !5 X+ !R- tv+ b++ !DI- D G e++ h---- > r+++ y++++ > -----END GEEK CODE BLOCK------ Unless you know the internal structure of the graphics files, Mathematica is incapable of doing what you want by itself. With the aid of a shareware program called Paintshop Pro, (www.jasc.com), you can convert over thirty kinds of graphics files into one another. The easiest to read as integer data are RAW (which is just a list of numbers) and PGM(which is a small text header and a list of numbers) or PPM(which is a small text header and a list of triplets indicating RGB colors).