Question about the FITS file(s) (again)

Software Siril
1

Hi,

I was wondering about this… According to the camera, etc, and exiftool (also uses libraw 0.20) the CR3 RAW files are (corresponding to the specs):

…
Lens Focal Length : 15
Lens : 15.0 - 35.0 mm
Aperture : 2.8
Image Size : 8192x5464
Lens ID : Canon RF 15-35mm F2.8L IS USM
Megapixels : 44.8
…

Yet Siril-1.0.0-x86_64.AppImage reports:

…
Saving FITS: file Lights_00010.fit, 1 layer(s), 8191x5463 pixels
19:10:40: Decoding Canon EOS R5 file (ISO=3200, Exposure=20.0 sec)
19:10:40: Filter pattern: RGGB
…

In the width and height 1 pixel is missing…

2

Siril uses LibRaw for DSLR raw image decoding. So this is the LibRaw interpretation here, with the active Area and Raw margins.

3

Exiftool also uses libraw (as does Rapid Photo Downloader) and gives the right size…

1 pixel off, both ways, is at least curious.

4

We are using the latest snapshot version in the AppImage. There have been many changes in LibRaw.

https://www.libraw.org/comment/6360
https://www.libraw.org/node/2117
and so on…

5

The 1 pixel off both ways is with the latest version of the AppImage (Siril-1.0.0-x86_64.AppImage).