Controlling face overlays from different photos
Posted Sep 10, 2009 20:47 UTC (Thu) by roelofs
In reply to: Controlling face overlays from different photos
Parent article: The Grumpy Editor's hugin experience
1) Converted the original images from JPEG into PNG. (JPEG seems not to support alpha channels).
JPEG/JFIF doesn't, but JPEG/JNG does (e.g., see libmng). It's not widely supported, though.
However, for what you're doing--multistage image editing--you want PNG or some other lossless format anyway. Switch back to JPEG only at the very end.
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