I have found two Nikon Coolpix B700 RAW files on the web that give strange colors with libRaw 0.8.16. When I try to open these files with Adobe Photoshop or Preview.app on Mac OS X, colors are ok.
While browsing this forum, I found this post "Issue with Pentax *istD" (3 May, 2017 - 14:53) about a Pentax PEF file that did not decode correctly in version 0.18.2, but did work in 0.17.2. A patch was proposed in the same post.
I have been using libRaw 0.15.4 (Windows 32bit) in my application since 4 years. Recently, we received some CR2, NEF and IIQ files that libRaw 0.15.4 was not able to process correctly (strange colors rendering or errors on opening). I decided to upgrade to a recent version of libRaw, so I tried libRaw 0.18.15 and 0.18.16 and it seems that most problems have gone away except some IIQ files that cannot be opened (while libRaw 0.15.4 worked well on these files).
I would like to open a .cr2 (from my Canon 6D) file, play with it and compare the result with already existing demosaicing algorithms.
I use codeblocks 16.01, mingw x64 5.0.3 (g++ version 7.2.0) and openCV 3.3.1 on Windows 10 x64.
I downloaded the latest LibRaw sources.
But i can't compile a simple program :
I tried many DNGs and raws from different cameras, and besides for the SD980 problem I reported yesterday, which was not really LibRaw's fault, they all worked very nicely, and I got results comparable to RawTherapee.
For most of the cameras I've tried, I either get values like 0.6 or 600 (which I divide by 1000).
However, I have a DNG where I get: INFO: cam_mul 0.001000 1127039.874999 0.004999 0
Raw Therapee seems to load the file just fine though. And so does IrfanView.
I've been trying to use LibRaw on a project, but keep running into an issue where the output images don't look "contrasty" enough -- they differ substantially in contrast from both the embedded previews in the JPEG, as well as ACR and FastRawViewer (which I understood uses libraw internally?)
Looking in FRV, there's an option called "contrast curve type", which is set to "variable contrast" -- I think this is what I'm missing.
How do I invoke libraw such that it mirrors the "variable contrast" setting, so that my images look right?
Dear All, thank you very much for this really nice piece of opensource software !
I would like to write an inverse problem solver, that take as input multiple RAW files (taken from the same image), and outputs 3 RGB files for the image.
The way demosaicking is performed is up to me, but I would like to be able to rely on LibRaw in order to consistently know the mapping between each pixel coordinate (x_i, y_i) and its color channels (R,V or B), wether the input raw comes from cannon/nikon/sony/pentax,... .
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