LibRaw technical support

Stable LibRaw versions: technical support, errors, API questions

raw-identify bug when displaying Camera2RGB matrix for Sony DSC-F828

Submitted by dsi on

This camera produces a RAW file that has a REGB layout which means there are 4 colors. This results in a non-square rgb_cam. However, the display code in raw-identify (v 0.19.6) appears to be incorrect. The code is as below:

for (int i = 0; i < P1.colors; i++)
printf("%6.4f\t%6.4f\t%6.4f\n", C.rgb_cam[i][0], C.rgb_cam[i][1], C.rgb_cam[i][2]);

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Pink Clouds with LibRaw 0.20.0

Submitted by olokobayusuf on

Hi all.

I'm getting pink clouds when trying to convert a RAW to a TIF/JPEG with LibRaw 0.20.0. I've run into this a while ago in fact, when using the RawPy wrapper library for Python.

Here's the RAW file in question, along with the TIF I get from LibRaw. I'm running the following:

./dcraw_emu -H 0 -o 1 -W -q 3 -w -T -g 1 1 -c 0.75 4.CR2

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Issue on some camera

Submitted by lock on

Hello everyone.
First thank you for your big work on this lib I used for my software.
Since the last version I have issues with some camera (especially canon). This is probably due to a big change you've done.

As stated in Changelog:
* Bayer images: ensure that even margins have the same COLOR() for both the active sensor area and the full sensor area.

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LibRaw::open_file() never returns

Submitted by David Partridge on

I've been sent some CR3 files that were reported as causing my application to freeze.

The problem appears to be that open_file() never returns and just sits there eating CPU.

These same files also cause Windows Explorer to freeze for a number of seconds and then Explorer closes and restarts (maybe they're using LibRaw internally to the raw file codec).

I've placed a zip file containing the bad files on Dropbox:

https://www.dropbox.com/s/oph39pbicm5jxjb/Bad.zip?dl=1

Thanks
David

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CR3 and 16 bit support

Submitted by merope on

Hi,

I am trying to convert CR3 images to 16 bit fits files used RAW2FITS, which uses libraw. I have the newest libraw installed, which supports cr3.

When converting to 8 bit images, everything looks fine. However, when setting the output_bps to 16 everything is garbled, at the libraw level. First of all, pixel values are all still 8 bit (max values of 255) and their coordinates are wrong also.

Any help is appreciated.

-Merope

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libraw errors with DNG files processed by Adobe LightRoom

Submitted by dsi on

Hi team,
I have a couple of DNG files that were created in Adobe LightRoom. You can find them here:

https://drive.google.com/drive/folders/1mxxENtJ6P51ksR6choAGbUSud451lNJX...

They fail when calling unpack() with the error "Corrupted data or unexpected EOF". Call to open_file works. Hence raw-identify is able to parse metadata from the file.

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Fuji X-T4 Compressed Samples

Submitted by Potch on

I found some samples of Fuji X-T4 raws that LibRaw seems to have problems handling.

There seems to be a few things going wrong with this one. The version that parse_fuji_compressed_header() finds is version 0 which is not supported as the check is for version != 1. This image does appear to be compressed though (half the file size of a normal X-T4). Not sure if LibRaw will support a version 0 compression algorithm but just something I noticed, also all the other conditions are satisfied as true for the compression check.

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