Am 12.09.2015 um 01:06 schrieb Carlos E. R.:
I have it set to store both raw and jpeg files for each photos.
That's what I do, too.
I notice that shotwell prefers to display .NEF photos, and sometimes creates jpeg files from them. I think it calls the process "developing". It can be done by the camera or by shotwell.
The camera "develops" the received information according to the settings of the camera (like effects, black-and-white, enhanced colors, sharpening, correction of lens distortion, what ever...) and saves it as the jpg-version. This is a processed version.
You see, what I need to learn first is what can be done with raw (.NEF) photos, concepts,
Raw files contain all the information your camera could save with it's chip, not applying any processing. Even if you set your camera to, say, black and white, the raw file will still have all the color information, uncompressed, with no loss. This is *much* more information than the jpg has. From raw you can easily correct many things. For example there is information in the dark parts that just remain black in the jpg, or light parts that remain white. You can even construct "hdr"-images (within limits) from raw. Imagine a raw as a negative. Later, "in the drakroom" you choose the gradation of the photo paper, the contrasts, you develop one part more than the other... all this you can do with raw, but not with jpg. On the other hand very often the cameras are so intelligent that they produce quite optimal jpg's, especially if you have set it to highest quality and largest size. So for many images it might not be necessary to go thru the raw process, because the cameras result is already good enough. I always convert jpg's to png for further working. Jpg looses information on every save due to compressing, png doesn't. and what software is appropriate in Linux. In fact I gave up "developing" raw's in Linux. The results didn't convince me or it was too complicated to achieve good results. So I use the camera manufacturers program on a Windows in Virtual Box. Except for the Sony, who's software is - to say it nice - crap. There I use DxO Optics, also on Win XP. If you have a virtual Win I'd give a try to Nikon's software that came with your camera. It's probably the easiest way to get used to the raw process. Disclaimer: this is my personal opinion. Lots of people "develop" raws purely on linux and are happy with it and it's about two years since I last went thru the linux raw programs: many thing might have bettered meanwhile. I guess all these programs have their websites, forums, mailing lists... Daniel -- Daniel Bauer photographer Basel Barcelona http://www.daniel-bauer.com room in Barcelona: https://www.airbnb.es/rooms/2416137 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org