Recent comments

Reply to: LibRaw 0.20 supported cameras   9 months 1 week ago

LibRaw is not about video, so no specific plans for ZRAW.

Nonetheless if you could share some sample file(s) with us, we'll look at them

Reply to: LibRaw 0.20 supported cameras   9 months 1 week ago

Hi, will ZRAW support be coming soon? Z-Cam's are getting quite popular with the indie cinie scene, so it'd be great to have those files supported by LibRaw.

Reply to: Some Lumix DMC-LX100 II images are coming out magenta   9 months 1 week ago

Libraw team pointed out that the problem could be in the firmware so we had our customer do an upgrade of the camera firmware and the problem is now gone.
Thanks!

Reply to: Some Lumix DMC-LX100 II images are coming out magenta   9 months 2 weeks ago

Thanks for looking into this issue.

Reply to: Some Lumix DMC-LX100 II images are coming out magenta   9 months 2 weeks ago

No, this is not known issue.
We really need sample file(s) with this issue.

Please send some to info@libraw.org (or use some file sharing service, eg. Dropbox or WeTransfer/Free option and send link to this E-mail)

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

The colors look fine. I have posted the image in the google drive link in my earlier post (f828_srgb_0.202.png). The image is different from 0.20.0 but does not appear bad or malformed.

Please confirm if the change to rgb_cam is expected.

Dinesh

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

OK, may be, too lazy to check.

Is something wrong with F828 colors and LibRaw 0.20.2?

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

Alex,
I debugged my code and actually looked at the rgb_cam values in memory and they are different between 0.20.0 and 0.20.2. You can check the values I have posted in my first post.

The google drive link above has the RAW file. You can confirm this at your end.

Dinesh

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

The problem was in raw-identify printing code, not in data.

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

Alex,
I understand there is no "right" answer when rendering an RGB image from CFA data. The images in 0.20.0 and 0.20.2 look quite similar (no opinion on which is better, they both look good).

I wanted to confirm that the changed value in 0.20.2 was expected and not accidental because it matched the values from an older behaviour.

Regards,
Dinesh

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

I cannot understand your question. You complained 0.20.0/raw-identify displays incorrect data for some color matrices. We fixed that in 0.20.1/0.20.2. What exactly is the problem?

Reply to: libraw 0.20.0 returns incorrect D65 multipliers and rgb_cam for ERBG file   9 months 2 weeks ago

Alex,
I am upgrading to 0.20.2 and I noticed for this file, the rgb_cam value matches that of 0.19.5 instead of 0.20.0.

The raw-identify output on 0.20.2 has the following:
Camera2RGB matrix (mode: 1):
1.6374 -0.2528 -0.0035 -0.3811
0.0672 0.8224 -0.5306 0.6410
-0.0009 -0.3551 1.4153 -0.0593

which matches 0.19.5 (see comments above). Is this intentional?

Regards,
Dinesh

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Sorry, know nothing about C# (both generally and specific wrapper you use)

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Ok, so reducing quality is with libraw_set_demosaic(handler, LibRaw_interpolation_quality.LINEAR); ?
I tried it and its speeding up the process already a little bit.

Unfortunate I can't access the params-scruct from SharpLibRaw, its not implemented, so I'm not able to play with  params.user_qual and/or use half-size.

Just to remember, I'm using c#

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

If so, you need raw to rgb interpolation that is performed by dcraw_process(). Reducing quality (or using half_mode) will speed-up things.

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

I need a rgb-pixmap.

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

And followup: what 'pixels' do you need? Original raw values, or processed RGB pixmap?

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

dcraw_process() parameters are adjusted via imgdata.params: https://www.libraw.org/docs/API-datastruct.html#libraw_output_params_t

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Sorry, how? With what function?
All I need is the pixels, but for 100.000 photos, which takes ages now since libraw_dcraw_process() needs 5-7sec per photo.

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

One may adjust params.user_qual and/or use half-size interpolation.

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Thanks Alex,

I found the pixels now in data[]. Its an c#-marshaling issue, wish needs a few more steps.

I also realized, that libraw_dcraw_process(handler); takes quiet a lot of time, several seconds, depending on the image-size. Is is really necessary for libraw_dcraw_make_mem_image()? Or is there a faster way to get the image?

Reply to: unexpected token `ZLIB,zlib,'   9 months 2 weeks ago

This happens when pkg-config has not been installed when running autoreconf prior to executing configure script.

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Followup: look into samples/mem_image_sample.cpp

Reply to: Using libraw_dcraw_make_mem_image   9 months 2 weeks ago

Data is not empty,

your pixels are in data[0].....data[data_size-1]

Reply to: Using libraw on Mac with c#   9 months 2 weeks ago

glad to hear that my assistance helped.

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