LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Strange 14bit output with libraw.dll + unprocessed_raw.exe

Hi!

While using libraw.dll together with unprocessed_raw.exe to decode various RAW file formats to simple to read PGM files for experimentation with my program
I found this strange thing with only Sony ARW files. That even for the input files that are meant to be 12bit (RAW pixel values somewhere in the range of 0-4095) I get output files with RAW pixel values somewhere in the range of 0-16383 (corresponding to 14bit).

Looking at the histograms confirms that "empty spaces" are added.

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Libraw slowdown when updating 19.2 to 20.2

Hi everyone,

I was using libraw 0.19.2 in my application for reading raw images. Once I decided to upgrade to 0.20.2 version image import obviously slowed down.
I would like to know if there is any specific reason for that, or maybe some new functionality has been added for importing that I miss for new version.

Just to note that in my app, both 19.2 and 20.2 were running the same code. Output data is the same but t_20.2 = t_19.2 * 2.

Please find code example bellow.

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Building libraw in debug mode on Mac

Hi,
I am not clear on how to build libraw in debug mode when using the configure script. I tried using CXXFLAGS=-g. But I noticed the .dSYM files were created in the libs directory with or without this.

The configure script itself has a -debug option but it appears to be related to debugging configure (atleast based on the comments) and not generating debug symbols.

Appreciate any help on this.

Dinesh

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Where is RAW Image data stored and datatype

I am working with another developer in creating a revised version of a popular astronomical application for analysing starlight.
Many users of the software use a variety of DSLR cameras to capture their scientific star images.
The key requirement, other than being able to handle a wide range of DSLR cameras, is that the data from the camera sensor MUST NOT have ANY processing done. We must only get the unaltered signal from each pixel without any processing of any kind (except what some DSLR cameras do themselves :)). Our software handles all processing of the RAW data.

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New camera support

Hello, my first post here. I have a new camera. It is an OM1 from OM systems. Just came out like a month ago and looks like its a big seller too. I am wondering if I can provide the developers here with any helpful info or files needed to get the RAW files from this camera supported by LibRaw. Especially since some of the software I use for astrophotography uses LibRaw.

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