hugin-devs team mailing list archive

[Stefan Peter <1330047@xxxxxxxxxxxxxxxxxx>]

Hi Roland

Interestingly the Darktable jpgs have less information that the original
ones:

-rwx------ 1 stefan stefan 15270635 Jun  8 12:30 Orig Jpeg/DSC_8317.JPG
vs
-rwxrwxr-x 1 stefan stefan 3777924 Jun 16 08:30 Darktable RAW2JPEG/DSC_8317.jpg

Therefore, the control point detector finds less connections between the
images and they are of lesser quality. From your ptos:

OrigJpg.pto:
Images are connected by 811 control points, Mean error after optimisation: 3.2 pixels, max 11.1. Good fit

Darktable Jpegs - Fail.pto:
Images are connected by 617 control points, Mean error after optimisation: 41.0 pixels, max 3945.2. Very bad fit

As a result, this project has failed to stitch with the dreaded
"Excessive overlap detected" error message.

I have attempted a stitch with hugin 2014.0 RC2. After deleting the
outlier points (distance > 30) and re-optimizing for "Positions and
View", I got 495 control points, a mean error of 7.3 and max distance of
31.9 which is still a bad fit. However, the project did stitch (see
http://hugin.stepet.ch).

To summarize: I can see no specific problem with jpgs from Darktable and
Hugin. But your Darktable images seem to miss some information which
influences the control point detector negatively. Maybe you need to add
some sharpening? Some contrast?

With kind regards

Stefan Peter

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https://bugs.launchpad.net/bugs/1330047

Title:
  Cannot Import jpegs from Darktable

Status in Hugin - Panorama Tools GUI:
  New

Bug description:
  I use my Nikon D610 with an Panorama Head for 360 Panos. I shoot with RAW+JPEG (FIne)
  When I try to stitch the Jpegs everything is Ok. Average error so around 2 - 6.

  But when I take the Jpegs form Darktable (NEF Raw just with Brighness correction, no Distortion correction) then it is not possible to stich them . 
  Either it does not find where the Image belongs to or when I works the Preview an the Result are a complete mess.

  When I directly convert the Images using DCRAW to 16 Bit Tiff it
  works.

  Filed a Bug in Darktable, but they said that i should contact you.

  I'm a Photografer working on Linux. Plese help me to finish my Workflow. 
  Thanx

  
  Hugin 2014.0.0.45cf4a3e9573
  Debian Testing 64Bit

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