LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Mac issue in 0.15.2 vs. 0.14.8

Submitted by celstark on

A few particulars - I am building a 32-bit (i386) version and linking using static libs. Compilation is on a 10.7.5 machine and with both 0.14.8 and 0.15.2, I use:

setenv LDFLAGS "-arch i386 -F/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks -L/Developer/SDKs/MacOSX10.6.sdk/usr/local/lib"
setenv CPPFLAGS "-arch i386 -I/Developer/SDKs/MacOSX10.6.sdk/usr/include -isysroot /Developer/SDKs/MacOSX10.6.sdk -mmacosx-version-min=10.5"
./configure --disable-demosaic-pack-gpl2 --disable-demosaic-pack-gpl3
make

(and I link to the .libs/libraw.a)

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Compile visual studio solution with demosaic pack

Submitted by jean80it on

I'd like to use a couple features of demosaic pack (namely amaze and CA correction) from a command line tool.
Think the best would be to start compiling libraw with demosaic pack support. I found the location into makefile to uncomment in order to compile with demosaic pack support, but i'm on Win/VS and would like to compile from there.
Plain compilation is OK under VS2012.
I tried adding a project with files from demosaic pack GPL 3 but it fails (probably due to unsatisfied dependancies).

Any hint/advice?

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adding LibRaw-demosaic-pack-GPL3 support

Submitted by jean80it on

Hi all! I came to know libraw searching for infos on CA_correct_RT.cc since i'm impressed of RawTherapee results in automatic chromatic aberration correction.
It would be awesome for my workflow to be able to use a command line tool to convert raw to more suitable formats and removinc CA in the process.
I successfully downloaded and compiled libRaw (on win8/VS2012) but now i'm a little confused about how to add LibRaw-demosaic-pack-GPL3 goodies.

Any advice?

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The usage of user_sat

Submitted by Novfrank on

I modified the value of user_sat from -ve to +ve, however the effect is weird. -ve values do not cause any effect on the image while positive values do not cause obvious effect. The +ve values, for an extreme effect, say 9000, only make the image being darker and more red.

I am wondering the usage of user_sat here. Should modifying saturation can make the image change from a black and white image to a very deep colored image?? It's because I see other image processing software is working like this when adjusting the saturation.

I'm using LibRaw 0.15.0-Beta4.

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Error occurs while using libraw.dll in VS 2010

Submitted by Novfrank on

I was using the old version 0.15.0-Alpha1 and I would like to change to the newer version. Then I again used the Native Building in Windows, i.e. open the cmd window and run "nmake -f Makefile.msvc", to build the libraw.dll and libraries for 0.15.0-Beta4. The building is successful, however when I overwrite the old .dll and .lib in my project of VS 2010 and run, I got an error "the procedure entry point could not be located in the dynamic link library libraw.dll". Why it happens??

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Exposure corrections problem

Submitted by nexxie on

Hello, Im working on project making HDR photo out of RAW images by making 3 samples with different exposures. Overexposing the image by setting values exp_shift between 2.0 and 8.0 works great but the underexposing values just arn't working. Setting them to 0.5 or 0.25 and it makes no difference on the result between it and input image.
Normal process - unpack(), dcraw_process(), dcraw_make_mem_image()

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problems with Nikon Coolscan 4000 .nef file

Submitted by Mpi on

Hello,

i actually try to load a RAW file created by the Nikon Coolscan 4000 Scanner.
Its a .nef file, original resolution 5408x3571 px, but i receive a wrong resultion and no image data.

Is it possible, that the Nikon Coolscan 4000 Raw files are not supported? (.nef is supported, but maybe the coolscan 4000 files are somehow special)

Thanks for your time,

Michael

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