Gamma correction don't work
I have set "(gamma-correction 2.2)" in the file ".gimp-1.2/gimprc" but gamma correction isn't done om my images. Do anyone have any suggestions ? I am using gimp version 1.2, gtk+ version 1.2.8 on solaris 7 and 8, cpu is sparc. I have all kind of visuals available but the 8 bit Pseudovisual is the default. Gimp seems to use a 24-bit TrueColor visual, but not the linear one which is first in reporting list from the X-server. (hardware: SUN 10/440 with elite3D-3m) (gamma-correction 2.2) have never worked for me in any previous version of gimp (1.0.4 and 1.1.29). I have tried it on my Linux box also with the same result. On this box there is only one 24 bit TrueColor visual available. Please answer direct to my email as well as to the mailinglist. -- - Per Grahn E-mail: [EMAIL PROTECTED] National Defense Research Establishment Div. of Sensor Technology / Dep. of Surveillance Radar P.O. Box 1165 Telephone: (+46) 13 378351 S-581 11 Linköping, SWEDEN Telefax: (+46) 13 378488
Re: Gamma correction for photos
try curves for that, Image->Colors->Curves. theres alot you can do with curves. you may want to look at scarse to calibrate your scanner http://ohm.phys.ualberta.ca/scarse/ and make sure your monitor is resonable too, http://ohm.phys.ualberta.ca/photo/calibrate/ On Thu, 31 Aug 2000, Renzo Lauper wrote: > Hi Rick > > Try Image->Colors->Levels and play with the levels. Often just a click on the >"auto"-button helps a lot already. > What you can try also is the entries in Image->Colors->Auto->. > > Hope it helps > Renzo Lauper > > On Thu, 31 Aug 2000 13:43:35 -0700 > Rick Rosinski <[EMAIL PROTECTED]> wrote: > > > Hello, all. > > > > I am using Gimp 1.1.24, and I am working with photos. > > I have scanned lots of photos, all which are a bit too dark, > > using Sane 1.0.1 with Umax 1220S. I want to change the gamma > > level the photos so it looks "normal", more like the prints which > > I scanned. Can anybody help me here? > > > > Thanks in advance. > > > > > > -- > > Rick Rosinski > > http://rickrosinski.com > > [EMAIL PROTECTED] > > > > -- > -- LINUX: Reboot once a year...just for fun. > -- Take a look at www.gameoefter.org >
Re: Gamma correction for photos
Hi Rick Try Image->Colors->Levels and play with the levels. Often just a click on the "auto"-button helps a lot already. What you can try also is the entries in Image->Colors->Auto->. Hope it helps Renzo Lauper On Thu, 31 Aug 2000 13:43:35 -0700 Rick Rosinski <[EMAIL PROTECTED]> wrote: > Hello, all. > > I am using Gimp 1.1.24, and I am working with photos. > I have scanned lots of photos, all which are a bit too dark, > using Sane 1.0.1 with Umax 1220S. I want to change the gamma > level the photos so it looks "normal", more like the prints which > I scanned. Can anybody help me here? > > Thanks in advance. > > > -- > Rick Rosinski > http://rickrosinski.com > [EMAIL PROTECTED] > -- -- LINUX: Reboot once a year...just for fun. -- Take a look at www.gameoefter.org
Gamma correction for photos
Hello, all. I am using Gimp 1.1.24, and I am working with photos. I have scanned lots of photos, all which are a bit too dark, using Sane 1.0.1 with Umax 1220S. I want to change the gamma level the photos so it looks "normal", more like the prints which I scanned. Can anybody help me here? Thanks in advance. -- Rick Rosinski http://rickrosinski.com [EMAIL PROTECTED]
Re: Correction
hi, > Well, I played around with it a little. Exactly how good do you want it? > It is fairly easy to modify levels and colors to get something that looks > okay. The date can be removed with the clone tool. Beyond that, it gets > more difficult. One really has to rebuild the image from scratch to do a > really good job (put different parts of the image in seperate layers, and > then modify them seperately. If you have a whole role of these pictures, > this could be an rather large project. ummm, if the whole roll was developed in the same way...under-exposed, wrong chemical mix etc etc, then all the photos would be affected the same way - so just create a script to do the job alan
Re: Correction
[EMAIL PROTECTED] (2000-08-18 at 1227.23 -0500): > Oops--noticed I did not include the URL of the xcf: > it's http://www.bsmanagement.com/llywelyn/images/cyrus/cyrus.xcf > Thanks! > Jim Clark Two things, the first link was wrong, I got something with cyrus.jpg but not with your link. And the second is that never ever use xcf! You should use xcf.bz2 or xcf.gz, at least for web. And for HD too, IMO, cos saves space and only adds a bit (maybe too much for some people?) to load / save times. As the compression is loseless and cmd line reversible, I do not see other problem to avoid it. Could you repost both links after testing? BTW, using JPG as intermediate format is bad. If you are scanning at home, use another format, if scanning in a bureau, ask for another format. IMO PNG is OK for all these jobs. GSR
Re: Correction
Well, I played around with it a little. Exactly how good do you want it? It is fairly easy to modify levels and colors to get something that looks okay. The date can be removed with the clone tool. Beyond that, it gets more difficult. One really has to rebuild the image from scratch to do a really good job (put different parts of the image in seperate layers, and then modify them seperately. If you have a whole role of these pictures, this could be an rather large project. -James Smaby
Correction
Oops--noticed I did not include the URL of the xcf: it's http://www.bsmanagement.com/llywelyn/images/cyrus/cyrus.xcf Thanks! Jim Clark
gamma correction in XFree86?
on which cards is the gamma option supported in XFree86 (3.3 or 4)? i could not find this on the xfree86 site, only a refernce to that option in the man page for XF86Config. __ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com
Display Gamma Correction doesn't work
Hi all, I'm trying to enable the display gamma correction by putting "(gamma-correction 2.7)" in "$HOME/.gimp/gimprc". "gimp --verbose" shows that this file is actually read and parsed without errors. However, the desired effect does not happen. gamma.tif still shows a display gamma of 2.7. I have to do manually Image->Colors->Levels gamma=2.7 to get the image correctly displayed (but this changes the contents of the image). If I do, for instance, "xv -gamma 2.7 gamma.tif", the image shows a gamma of 1.0. How do I accomplish this with gimp? I'm using gimp-1.0.4 on i586 Linux glibc-2.1 with XFree86-3.3.4 (S3-Server). Peter
