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A new PNG spec

(www.programmax.net)
612 points bluedel | 1 comments | 24 Jun 25 13:01 UTC | HN request time: 0.244s | source
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qwertox ◴[25 Jun 25 05:19 UTC] No.44373847[source]▶
> Officially supports Exif data

Probably the best news here. While you already can write custom data into a header, having Exif is good.

BTW: Does Exif have a magnetometer (rotation) and acceleration (gravity) field? I often wonder about why Google isn't saving this information in the images which the camera app saves. It could help so much with post-processing, like with leveling the horizon or creating panoramas.

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1. pezezin ◴[26 Jun 25 06:07 UTC] No.44384608[source]▶
Ages ago I worked on photogrammetry software, and the lack of such information was indeed painful for us. One of the most important parts of the processing pipeline is calculation the position and orientation of each camera; having at least the orientation would have made our life much easier.