Fuji X-E2s White Level

Submitted by netgeek on

Hello,

I'm noticing that LibRaw reports a different white level from Adobe's DNG for this camera (and possibly other Fuji cameras too).

Here is one publicly available test image.

http://img.photographyblog.com/reviews/fujifilm_x_e2s/sample_images/fuji...

I converted this image to a DNG using Adobe's DNG converter. The white level stored in the DNG is 16383.

But libraw.imgdata.color.maximum contains 15872 (0x3e00). It looks like this was set in dcraw_common.cpp in the identify() function.

maximum = (is_raw == 2 && shot_select) ? 0x2f00 : 0x3e00;

I chose a few X-E2s images that have a full tonal range (very dark to very bright pixels) and examined the pixel values in libraw.imgdata.rawdata.raw_image. The maximum value is 16383, so it would seem that DNG is reporting the correct value.

Is this a bug?

Forums: 

Thank you for the problem

Submitted by lexa on

Thank you for the problem report.

This code line should work for old Fuji cameras (SuperCCD), but not for current line (X-Trans and current bayer line)

-- Alex Tutubalin @LibRaw LLC

So how should this be fixed?

Submitted by netgeek on

So how should this be fixed? I presume it'll involved detecting if this is a SuperCCD camera and setting a different white level?