search for: graylevel

Hi all, Roger Peng and Jason Turner's suggestion with ImageMagick seem to be the simplest "dirty" way to get the problem solved. But I ran into yet another interesting but quite round-about way to solve the problem (partially). Through tcltk package, one can read in the gif image with > x <- tkcmd("image", "create", "photo", file=mypic.gif)

...ear all, I try to figure out how to use R to count the number of pixels of the same color in some gray-level picture. I managed to read it in either tiff or jpeg format, but the returned pixmap object keeps its information out of (my) reach. Is there an easy way to tabulate the different color/graylevel pixels and their numbers? Or should I use a completely different (free) software? Thanks for any hint, Christian. -- *********************************************************** http://cognition.ups-tlse.fr/vas-y.php?id=chj jost at cict.fr Christian Jost (PhD, M...

...4b8, product=0x011d) at /dev/uscanner0 scanimage -L says: device `plustek:/dev/uscanner0' is a Epson Perfection 1260/Photo USB flatbed scanner scanimage -vv > image.pnm says: scanimage: scanning image of size 248x150 pixels at 24 bits/pixel scanimage: acquiring RGB frame scanimage: min/max graylevel value = 255/0 scanimage: sane_read: Error during device I/O Closing device Calling sane_exit scanimage: finished FreeBSD is 4.8-STABLE from today. sane: sane-backends-1.0.12_1 sane-frontends-1.0.9 xsane-0.90 dmesg: uscanner0: EPSON EPSON Scanner, rev 1.10/1.00, addr 2 Anything else I cou...