Displaying 3 results from an estimated 3 matches for "graylevel".
2002 Mar 14
1
gif, jpeg and png image files reader AND tcltk image
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)
2006 Mar 09
1
count pixels of same color in pixmap object?
...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...
2003 Aug 04
1
Question: USB Scanner Epson Perfection 1260 not working
...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...