LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Pink/purple color cast on Sony A7III ARW file?

Submitted by Kuro on

I'm using LibRaw 0.19.2.

I've this pink/purple color cast issue on just one ARW file taken with the Sony A7III. All the other files from the same camera so far looked fine.

But when I open this problematic file with FastRawViewer or other RAW converters, the colors look fine.

So why am I getting this color cast on this one file?

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Reading a file that is just 8 bit Bayer pixels

Submitted by crj11 on

I have a file from "fswebcam --dumpfile" that is just a stream of 8 bit pixel values. There is no other data in the file. Is it possible to read this into LibRaw and demosaic it into a file such as a TIFF or JPEG file? When I try to read the file in with imread(), it says that the file has an unsupported format.

Basically I want to be able to specify the XY size of the file and the pixel format so that LibRaw can read the file.

Thanks
Chris

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order of operations (matrix, white balance etc)

Submitted by laserpanda on

Hello

I'm experimenting with converting raw (Fuji RAF) files and im struggling a little bit to understand the order of how operations are done.

My expectation would be:

dcraw_emu -4 -r 1 1 1 1 -o 0 (raw) -> Camera2rgb matrix -> white balance mult -> srgb = good picture!

However, this results in an overly saturated image with blue colours going into negative values

so I tried a few other combos:

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libraw wide char format support on MSYS2

Submitted by lock on

Dear all,
I'm developing a software that uses libraw. This software is multi-platform and is able to run on GNU/Linux, OS X, FreeBSD and Windows through MSYS2.
Indeed, libraw is available on MSYS2 and that makes things easy. However there's a small issue that is kind of annoying: I cannot use the function 

libraw_open_wfile

as I would like to do. For example with libtiff i use TIFFOpenW.

Indeed, in libraw.h this line:

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LibRaw 0.19 Crashing DigiKam6 on macOS

Submitted by benjcmin on

Hi,
I have an issue with LibRaw 0.19 on macOS. I'm using DigiKam 6beta which now includes LibRaw 0.19 and this is crashing while scanning RAW (NEF) images from a Nikon D5300 12bit.
This is not happening with LibRaw 0.18.11 in an earlier build of DigiKam6beta

How can I help to track this bug down and get it fixed?

kind regards
Benjamin

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Libraw 0.19 crashes on macOS if used in a background thread

Submitted by lemkesoft on

Hi,

I use Libraw since some months in my app GraphicConverter 10 as optional RAW import.

I updated from the 0.18.x to version 0.19.
But the new version does crash if used in a background thread.

The crash occurs during initialization of the object:
LibRaw RawProcessor;

I attached a screenshot from the debugger.

Any help is appreciated.

Thorsten

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