http://ufraw.sourceforge.net/lensfun.html

So someone with indows and a compiler has to do the work….

All went well, thanks for the good wishes!

And off screen again.

It really depends on what you call underexpose. It’s right you shouldn’t overexpose (blow out whites) on a digital sensor. However there is a technique called “Expose to the Right”, which basically means with a digital sensor you should expose as much as possible (without over exposing). Meaning no pixel should have 255 as value. Your camera’s overexposure indicator should blink. And your histogram would probably lean to the right (this is what the technique gets it’s name from).

This may very well mean the image may seem overexposed to the human eye, but a digital sensor is linear, it just means you’re optimally using the sensors dynamic range.

One thought about the film button: As I experienced this button simulates the contrast of analogue films, which is basically a reduction of contrast in the highlights*. This helps a lot with over-exposed images (or parts of them) that still have deep shadows. On correct exposed images the digital setting should be chosen – otherwise the picture will look low in contrast and grey.

* Actually, I read a book from 1960. I was told that one should overexpose a little bit at critical images. In books about digital photography it is written that one should underexpose. Therefore, I would say, that analogue films can handle overexposed parts better, digital sensors handle underexposed parts better.

Just change deb to deb-src!

Does anyone know where I can get the deb amd64 ubuntu for the ufraw that contains lensfun? I wish the builds had this installed!!

there is nothing much to add to the get-well-wishes. So I thought instead of bringing flowers or cookies, I give you this home-made table of contents:

0:00 Intro
0:26 Statistics
1:50 Pascal’s e-mail blog.pcode.nl
4:16 – Fire up UFRaw!
4:30 – Color matrix vs. Color profile
5:57 — Working Color Space Profile
6:33 — Rendering Intent Option
8:50 – Details Restauration & Highlight Clippings
10:13 – Import base curves from .NCV
10:26 – Auto black point correction works perfectly!
11:13 – New features in new version of UFRaw
11:36 – LensFun
14:00 – Fix cromatic aberration
15:57 – Optical Vignetting
16:23 – Lens distortion – Panotools
17:16 – Lens geometry
19:18 Outro

It’s yours, do whatever you want to do with it

Stefan