hugin-devs team mailing list archive

[Stefan Peter <1630172@xxxxxxxxxxxxxxxxxx>]

Dear Alex Fliker

autopano-sift-c has been deprecated for quite some time now due to
concerns about the use of a patented algorithm, IIRC. It has not seen
any maintenance since 2009. No wonder it has fallen behind regarding
support of current features.

Why don't you use cpfind instead?

With kind regards

Stefan Peter

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https://bugs.launchpad.net/bugs/1630172

Title:
  Unadequate stitching of a HDR panorama

Status in Enblend:
  New

Bug description:
  HDR files:

  https://fliker09.tk/sharedstuff/launchpad/1.hdr
  https://fliker09.tk/sharedstuff/launchpad/2.hdr
  https://fliker09.tk/sharedstuff/launchpad/3.hdr
  https://fliker09.tk/sharedstuff/launchpad/4.hdr

  
  Project file:

  https://fliker09.tk/sharedstuff/launchpad/panorama_8_panomodify.pto

  
  Execute:

  nona -m EXR_m -o panorama panorama_8_panomodify.pto

  I get 4 EXR files. For visualization I tone-mapped them using mai11
  operator:

  https://fliker09.tk/sharedstuff/launchpad/panorama0000.jpg
  https://fliker09.tk/sharedstuff/launchpad/panorama0001.jpg
  https://fliker09.tk/sharedstuff/launchpad/panorama0002.jpg
  https://fliker09.tk/sharedstuff/launchpad/panorama0003.jpg

  
  Looks all good. After that I try to stitch them using enblend 4.2 (nft and graph-cut algorithms) and verdandi 2016.2.0 (watershed algorithm):

  enblend --wrap=horizontal --blend-colorspace=IDENTITY -o panorama_original.exr --primary-seam-generator=nearest-feature-transform panorama000*.exr
  enblend --wrap=horizontal --blend-colorspace=IDENTITY -o panorama_original.exr panorama000*.exr
  verdandi --wrap --seam=blend --output=panorama_original.exr panorama000*.exr

  I again tone-mapped the results for visualization:

  https://fliker09.tk/sharedstuff/launchpad/hdr/

  I hope no commentaries are needed...

  
  Next, I decided to tone-map the nona's output:

  pfsin panorama000$i.exr | pfstmo_mai11 | pfsout panorama000$i.tiff
  convert panorama000$i.tiff -channel a -negate +channel panorama000$i.tif

  After that I stitched again:

  enblend --wrap=horizontal --compression=none --blend-colorspace=IDENTITY --fine-mask -o panorama_original.tif --primary-seam-generator=nearest-feature-transform panorama000*.tif
  enblend --wrap=horizontal --compression=none --blend-colorspace=IDENTITY -o panorama_original.tif panorama000*.tif
  verdandi --wrap --seam=blend --output=panorama_original.tif panorama000*.tif

  And here are the results:

  https://fliker09.tk/sharedstuff/launchpad/tmo/

  
  Difference is huge... Much better results! Now the question - why so bad with EXR files? Am I doing something wrong?

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