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A new PNG spec

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618 points bluedel | 2 comments | 24 Jun 25 13:01 UTC | HN request time: 0.022s | 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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jandrese ◴[25 Jun 25 05:43 UTC] No.44373957[source]▶
Yes, but websites frequently strip all or almost all Exif data from uploaded images because some fields are used by stalkers to track people down to their real address.
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johnisgood ◴[25 Jun 25 07:12 UTC] No.44374422[source]▶
And I strip Exif data, too, intentionally, for similar reasons.
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bspammer ◴[25 Jun 25 08:21 UTC] No.44374866[source]▶
That makes sense to me for any image you want to share publicly, but for private images having the location and capture time embedded in the image is incredibly useful.
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1. jandrese ◴[25 Jun 25 16:56 UTC] No.44379453{4}[source]▶
If you are uploading it to a website you are sharing it. Even if the image is supposedly "private" you have to assume it will be leaked at some point. Remember, the cloud is just someone else's computer, and they can do what they want with their computer. They may also not be entirely competent at their job.
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2. johnisgood ◴[25 Jun 25 22:20 UTC] No.44382312[source]▶
Yes, once something has been shared (or stolen), you lost control over it, be it information or an image. EXIF data is fine, if it never leaves your device or if your device is not compromised.