Enfuse is a command-line program used to merge different exposures of the same scene to produce an image that looks very much like a tonemapped image (without the halos) but requires no creation of an HDR image. Therefore it is much simpler to use and allows the creation of very large multiple exposure panoramas. … Read more
March 5, 2008
January 27, 2008
January 26, 2008
LightZone for Linux, Redux
Just a quick pointer to a helpful comment left by LightZone COO Scott McGregor to my earlier post:
A production version of LightZone for Linux is planned. But there are so many Linux variants that we want to make sure that we get a large number beta testers distributed across them before we go to production status. At this point (January 200
we expect to extend the beta period another 90 days, through the end of April to be sure we get that coverage. During that period of time we expect to do periodic updates to address reported bugs and to keep the Linux version synchronized with our Mac and Windows versions at all times.
We recently released the 3.4 version of our product for Mac and Windows, and simultaneously our 3.4B Linux release. The 3.3 version uncovered some OS dependent bugs that caused crashes on some Ubuntu systems. The specific cause of the reported Ubuntu bugs was localized and fixed in 3.4B, but the point of staying in Beta for a while is to ensure we shake out any others. In the meantime, Linux users get the benefit of a LightZone release on par with Windows and Mac, absolutely FREE. Give it a try, give us your feedback, and we’ll be able to turn out quality production release at the end of Beta testing. –Scott McGregor, COO, Light Crafts, Inc.
January 21, 2008
Lemons (and LightZone for Linux)
Lemons, originally uploaded by Eric Jeschke.Key: R20001019-173143
I was deliciously surprised the other day to find out that LightCrafts had released another beta of LightZone for Linux. The announcement seems to hint that they may actually support the product too! Now if there was only some notice about when the product might actually be out of beta and really supported…
I wonder if I can buy version 3.X, and then use it on my Mac and Linux…that would be the ticket…
Featured comment:
A production version of LightZone for Linux is planned. But there are so many Linux variants that we want to make sure that we get a large number beta testers distributed across them before we go to production status. At this point (January 200
We recently released the 3.4 version of our product for Mac and Windows, and simultaneously our 3.4B Linux release. The 3.3 version uncovered some OS dependent bugs that caused crashes on some Ubuntu systems. The specific cause of the reported Ubuntu bugs was localized and fixed in 3.4B, but the point of staying in Beta for a while is to ensure we shake out any others. In the meantime, Linux users get the benefit of a LightZone release on par with Windows and Mac, absolutely FREE. Give it a try, give us your feedback, and we’ll be able to turn out quality production release at the end of Beta testing. –Scott McGregor, COO, Light Crafts, Inc.
January 16, 2008
open source noise removal
Ran across this interesting post on greycstoration; an open-source noise reduction tool similar to Noise Ninja.
Note to self: check this out and report back here! Apparently there is a GIMP plug-in.
December 22, 2007
Lens correction with Fulla
I’d like to draw your attention to a little command-line tool that I’ve run across that is very good at doing one thing: lens correction. It uses the panorama tools library (yes, the same excellent one by Helmut Dersch, now a full open source project) to do lens corrections based on (my research is weak here) mathematical models for optimal lens behavior. I installed it on Ubuntu easily by:
$ sudo apt-get install hugin-tools
The man page describes it thusly:
“Apply radial or flatfield vignetting correction as well as geometrical radial distortion and transversal chromatic abberration correction.” (sic)
I mostly use it to correct for the barrel distortion and vignetting that occurs using my zoom lens at the widest setting. It sounds like it can correct for some types of chromatic aberration as well. The extra cool feature of this tool is that it can read the camera make and model from the EXIF data and look up the necessary coefficients in a database (just some flat text files) stored in your home directory. It’s a little tricky to get the database set up and to figure out the correct string to use, but from then on out it’s dead simple to use. Here’s an example:
$ fulla -p -a -m 'CASIO COMPUTER CO.,LTD' -l Standard -o R20070202-172308-cor.png R20070202-172308.jpg
Casio EX-P600, Lens Standard @ 7.100000 mm
PTLens coeff: a=0.020742 b=-0.051562 c=0.000000 d=1.030820
correcting image: : |
Before and after. Click on the pictures to view them in Flickr and then select “All Sizes” to see the effect of the barrel distortion and correction better at larger sizes. I’ll post another example later that shows the vignetting correction.
The only other limitation is that the camera database does not seem to have been updated in a while. For example, I found my main camera, the Casio EX-P600 in there, but not my newer Fujifilm F31. The author of the database, which was for a separate project (ptlens), took that project closed-source and encrypted the database at some point. If anyone knows of a source for an up to date database with newer cameras i’d love to hear about it.
