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Question #2145

closed

IIIF: keep transparency

Added by Bernhard Koschiček-Krombholz 12 months ago. Updated 12 months ago.

Status:
Closed
Priority:
Normal
Assignee:
Bernhard Koschiček-Krombholz
Category:
IIIF
Target version:
-
Start date:
2023-12-27
Estimated time:

Description

Currently, transparency get lost in conversion process to a pyramid tiff. The background is either black or white. To keep the original transparency the vips command has to be modified, see https://www.libvips.org/API/current/VipsForeignSave.html#vips-tiffsave

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 #1

Updated by Bernhard Koschiček-Krombholz 12 months ago

  • Tracker changed from Feature to Question
  • Status changed from Assigned to Closed
  • Target version deleted (8.3.0)

If the conversion is set to deflate than the alpha channel will correctly be converted. If the conversion is set to jpeg, the alpha channel gets lost. I added this information to the manual entry of the IIIF configuration.

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