LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

Canon AFInfoData mismatch with ExifTool parsed result

Submitted by qdwang on

CR3 file: https://www.dpreview.com/sample-galleries/8035448300/canon-eos-m50-mark-...

I've dumped the HTML analysis file though this: exiftool -htmldump IMG_0993.CR3.

Pls check the png comparison file uploaded below. The Libraw AFInfoData dropped a lot of useful info here.

Thanks~

Forums: 

Read exif issue from panasonic raw file

Submitted by qdwang on

According to the https://exiftool.org/TagNames/Panasonic.html, the `AFPointPosition` tag id is 0x004d.

But it seems to the PanasonicRaw tags parsing is used in libraw.

Is it possible to access the 0x004d exif data form modern RW2 file without modifying the source code heavily?

Thanks for your great work.

Forums: 

DigiKam Raw Conversion Output

Submitted by Tarek on

Recently I have stumbled upon DigiKam software which uses intenally Libraw library as a raw conversion engine.
I have tried to convert one of the images I have using DigiKam with all conversion settings disabled/set to default (i.e. gamma 1.0, no auto brightness, camera wb, no expsoure correction) and only I have an input a custom icc profile and output color space set to AdobeRGB. The output looks like this here (https://imgur.com/a/rJ3pS2b)

Forums: 

LCMS and Libraw Support

Submitted by Tarek on

I have just compiled Libraw with enabling LCMS2 on Win10. From the generated executables it works just fine now and it can profile well. However, I am looking for using it as a dll library in my C++ code, so when I linked the compiled Libraw to my visual studio project I don't seem to be able to apply profiles, just like LCMS is not supported in the API.

Could you please point out if I am missing something? shouldn't Libraw API sees LCMS after compilation ?

Forums: 

Phase One IIQ decoding

Submitted by t.sawka on

Hello

I'm trying to use LibRaw to decode Phase One IIQ images from two cameras: iXM-100 (not officially supported) and IQ280 (supported). I save results to .tif files and thumbnails to .pnm. I used all default settings.
Code I used:

https://drive.google.com/file/d/1PnbVb2J8jXkoGiOWqEa_n8A5X4-5zGTJ/view?u...

I also tried to use Open Image IO tool (which as I understand uses LibRaw as backend).

Forums: 

I think the ACES color profile in libraw is incorrect

Submitted by bkv on

This is in reference to using dcraw_emu, though I imagine this could be an issue for libraw in general. I was comparing the output of photos developed with ACES to output with ProPhoto in a color managed photo viewer, and I noticed the colors just seemed a bit off, they looked warmer than I would expect. So, I extracted the ICC profile from the photo and took a look at the primaries, shown in the forward matrix below.

R G B
X 1.00600 0.01668 -0.05212
Y 0.36885 0.72124 -0.08864
Z -0.00362 0.01096 0.75758

Forums: 

Sigma X3F support

Submitted by lanthale on

I have just did some testing with my Photoslide app and recognized that I cannot open X3F file. During my forum search I found out that this should be possible with the first 0.20.2.

Do I have to enable some special flags during building to enable the Sigma X3F support ?

Thank you in advance.

best regards,
Clemens

Now offical build of Photoslide is supported by libraw https://github.com/lanthale/PhotoSlide/releases/tag/v1.0.16

Forums: 

Pages

Subscribe to RSS - LibRaw technical support