hugin-devs team mailing list archive

[tmodes <2089848@xxxxxxxxxxxxxxxxxx>]

I see 2 issues.

The first one is what the displayed warning: Is it really 32 bit
unsigned int? Or should it be 32 bit float values? In the latter case
the tiff file is wrongly written. If unsigned int is true, then you can
ignore the warning.

Second, your images have black/zero pixels in some channels:
checkpto --print-image-info project.pto

<snip>
Image 0: P8240781.tiff
    Pixel type: UINT32
    Pixel size: 4640x3472
<snip
    Red channel: 0-1071917568
    Green channel: 0-1071728960
    Blue channel: 0-1071289856

Image 1: P8240782.tiff
    Pixel type: UINT32
    Pixel size: 4640x3472
<snip>
    Red channel: 0-1066769792
    Green channel: 1009359040-1066211520
    Blue channel: 0-1064827200

Only the green channel of P8240782.tiff looks good. All other channels
(red, green and blue of P8240781.tiff and also red and blue of
P8240782.tiff) have black pixels/zeros.

Hugin does an internal autostretch of the contrast for working with the data. This step is corrupted by these black/zero pixels.
(At some place like the images panel the autostretch is done on a downscaled image. The downscale does smooth out in some degree the black pixel and therefore the image look different here.)

So as a first step you should fix these black pixels in Affinity Photo
2.

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https://bugs.launchpad.net/bugs/2089848

Title:
  possible 32bit TIFF mishandling

Status in Hugin:
  Incomplete

Bug description:
  I'm testing an HDR workflow with 32bit HDR tiff files (BT.2020 Linear) and have noticed 2 issues:
  1) The thumbnails on the Photos tab have different gamma/color mapping to the previews in the Masks and Control points (I suspect that these three tabs are not using the same gamma curve).
  2) cpfind returns 0 control points.


  running on: 
  M1 Mac, macOS Sequoia 15.1.1
  cpfind 2024.0.1.ead3af10a01a built by Author name

  
  cpfind log:
  Hugin's cpfind 2024.0.1.ead3af10a01a built by Author name
  based on Pan-o-matic by Anael Orlinski
  Using 7 threads

  Project contains the following images:
  Image 0
    Imagefile: /Volumes/Ursula/trip photos/RAW to JXL (automated 1.5eV)/subs/P8240703 panorama (mono and color)/P8240703.tiff
    Remapped : no
  Image 1
    Imagefile: /Volumes/Ursula/trip photo/RAW to JXL (automated 1.5eV)/subs/P8240703 panorama (mono and color)/P8240704.tiff
    Remapped : no
  Image 2
    Imagefile: /Volumes/Ursula/trip photo/RAW to JXL (automated 1.5eV)/subs/P8240703 panorama (mono and color)/P8240705.tiff
    Remapped : no
  Image 3
    Imagefile: /Volumes/Ursula/trip photo/RAW to JXL (automated 1.5eV)/subs/P8240703 panorama (mono and color)/P8240706.tiff
    Remapped : no

  --- Analyze Images ---
  i0 : Analyzing image...
  i1 : Analyzing image...
  i3 : Analyzing image...
  i2 : Analyzing image...
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.
  Warning: TIFFDecoder: no TIFFTAG_SAMPLEFORMAT or TIFFTAG_DATATYPE, guessing pixeltype 'UINT32'.

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