Legacy ImageMagick Discussions Archive

Sorry for the silence - had to focus on some other things for a while, but now back to this. I'm uploading all the raw DNGs (converted from the original NEF) here: https://drive.google.com/drive/folders/16orZZ_jB_i2qb5pNWO2JuF9zT08Ar26A?usp=sharing. So, overall, I'm trying to equalize the exposure ...

so, i'm not really clear on what brightening actually does (i should learn more about image and raw file formats), but will any of this defeat the original purpose of starting from an original exposure and then compensating based on iso? i'm concerned that i'm somehow not properly bringing over the ...

Thanks snibgo, for all your help. I'm going to try to avoid compiling dcraw if possible, as i'm on windows and it's always a pain somehow. If i have to though, i'll try. Or i'll do it on a linux vm. Ok, so things are looking better. Now, dcraw ends up with a darker looking image, though the colors ...

Actually, i have a D810... forgot... here's an example of the dcraw output i'm getting by running the following: $ for i in *.NEF; do dcraw -v -4 -r 1 1 1 1 -g 1 1 -o 0 -T -O tiff/"$i".tiff "$i"; done Loading Nikon D810 image from DSC_5240.NEF ... Platform 0: Intel(R) Corporation OpenCL 2.1 Device 0 ...

ahh... but that wouldn't allow me to read in the current iso of the photo, correct? i would have to embed that in a larger script... i assumed the magick command above was reading the iso of the current image...

also, what is the "-R" option there? don't see it in dcraw 9.27 anywhere...

got it - thanks snibgo.

Thanks very much, @snibgo! That sounds great, and yes, I'm working with RAW here. Do you think it'd work reading and writing in RAW format (NEF preferred), or do i have to convert to tiff as your command line indicates above?

Hello all, As part of a photogrammetry project, I took a few hundred photos of an object using manual settings on a D800, saving images in NEF RAW format. However, I forgot to turn off auto-iso (argh!). So, all my photos have the same aperture and shutter speed, but they differ in their ISO. I would ...