Lock orientation of images

[Franck Dupont]

Hello,

By default on my installation, UV auto rotate images : images in landcape orientation are automatically rotated after loading.

Is there a way to disable this functionality, and so lock the original orientation ?

Thanks for adavance.

Franck.

[Demian Katz]

Do you have an example manifest that demonstrates this behavior?

 

- Demian

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[Franck Dupont]

https://www.u-picardie.fr/phn/patrimoine/items/show/8 (the first image).

It seems related to the UV config, rather than manifest.

Thanks.

Franck.

Le lundi 18 mai 2020 13:17:26 UTC+2, Demian Katz a écrit :

Do you have an example manifest that demonstrates this behavior?

 

- Demian

 

From: univers...@googlegroups.com <univers...@googlegroups.com> On Behalf Of Franck Dupont
Sent: Monday, May 18, 2020 7:09 AM
To: Universal Viewer <univers...@googlegroups.com>
Subject: [EXTERNAL] Lock orientation of images

 

Hello,

 

By default on my installation, UV auto rotate images : images in landcape orientation are automatically rotated after loading.

 

Is there a way to disable this functionality, and so lock the original orientation ?

 

Thanks for adavance.

 

Franck.

 

 

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[Demian Katz]

Franck,

 

What image server are you using? I suspect there may be something strange going on with the underlying source image or the image server rather than the UV itself.

 

I tried loading your manifest in the public demo and ran into a very strange situation where zooming in and out seems to cause the image to rotate:

 

http://universalviewer.io/uv.html?manifest=https://www.u-picardie.fr/phn/patrimoine/iiif/8/manifest#?c=0&m=0&s=0&cv=0&xywh=-1401%2C173%2C8011%2C3377

 

That is definitely not normal behavior, but I think it’s probably more likely that it’s coming from the way your image server is generating tiles than from the way OpenSeadragon is requesting tiles from within UV.

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[Ian Chan]

Hi, what was the solution to this issue?
I think I have a similar problem here -  COVID Grocery · Stories & Snapshots: Documenting a Year of the Pandemic (csusm.edu)

It's the only image on the site where we've encountered this problem.

[Demian Katz]

I don’t recall if I ever heard more about the thread below… but I strongly suspect that these issues are related to inconsistent handling of orientation metadata, which is probably happening in your image server rather than the UV itself (see https://www.howtogeek.com/254830/why-your-photos-dont-always-appear-correctly-rotated/ for some background). It’s possible there is a setting in your image server that could resolve this; it may also be possible to do some processing on the image to fix the problem, if it’s truly a single isolated case (though depending on your workflows, this may be impractical or undesirable if you want to leave the source image untouched).

 

- Demian

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