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Daniel-KM / Omeka-S-module-IiifServer

IIIF Server is a module for Omeka S that adds the IIIF specifications to serve any images and medias.
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Tiles garbled #36

Closed coret closed 2 years ago

coret commented 2 years ago

When viewing an image via UV/IIIF the initial image is ok, but when you zoom it seems the incorrect sequence of tiles is loaded.

image

You can see an example via https://www.goudatijdmachine.nl/data/document/ark:/60537/b001M1 (image above) or use your own favorite viewer and load https://www.goudatijdmachine.nl/data/iiif/2/35305/manifest (as the effect is also visible in other viewers, I ruled out my viewer).

I'm not sure if this is an issue of IiifServer 3.6.6.6 or ImageServer 3.6.10.3.

Daniel-KM commented 2 years ago

Yes, it's strange, I never see this issue. Did the tiles work before last version?

coret commented 2 years ago

I have images where the tiling works as aspected. Actually, I just made a new test item with several images (click on Index in de viewer), the first 2 consistently get the correct tiles, the third and fourth image (both from the same photo shoot) do not.

All of the images are Jpeg's (downloads available), nothing out of the ordinary as I can see.

Can we conclude from this test the issue is more likely to be found in the ImageServer part?

coret commented 2 years ago

I have opened one of the photo's in an image editor and just saved the file. When I upload this "copy" the tiling works, see image 5 on https://www.goudatijdmachine.nl/data/document/ark:/60537/bS5ukr

So it seems that there's an issue with tiling some specific jpeg's - so an issue with ImageServer? Shall I close the issue here and make a new issue in the ImageServer repo?

image

coret commented 2 years ago

If anyone runs into the same issue, I have run mogrify -auto-orient *.JPG on my images and now, if I add these images the tiling works without a problem.

(I first tried mogrify -strip *.JPG but then the orientation info was stripped too and all images ended up up-side-down in my case)

Before:

$ file DSC00010.JPG
DSC00010.JPG: JPEG image data, Exif standard: [TIFF image data, little-endian, direntries=12, description=     ,
manufacturer=SONY, model=DSC-HX400V, orientation=lower-right, xresolution=208, yresolution=216, resolutionunit=2,
software=DSC-HX400V v2.10, datetime=2018:01:26 11:34:34], baseline, precision 8, 5184x3888, components 3

After mogrify -auto-orient DSC00010.JPG:

$ file DSC00010.JPG
DSC00010.JPG: JPEG image data, JFIF standard 1.01, resolution (DPI), density 350x350, segment length 16, 
Exif Standard: [TIFF image data, little-endian, direntries=12, description=     , 
manufacturer=SONY, model=DSC-HX400V, orientation=upper-left, xresolution=208, yresolution=216, resolutionunit=2, 
software=DSC-HX400V v2.10, datetime=2018:01:26 11:34:34], baseline, precision 8, 5184x3888, components 3
Daniel-KM commented 2 years ago

Ok, so it's not related to the modules, but to the images.

coret commented 2 years ago

I do not agree, the modules seem incapable of correctly processing the images by this specific camera. I have not dived into the code, but my guess is the metadata was not processed correctly. Tools like imagemagick don't have any problem handling the images.