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It is a particular implementation of the RAW format, and specifically listed as "open, non-free". Which I would think most people would consider proprietary. I

by 1_2__3 10y ago

It is a particular implementation of the RAW format, and specifically listed as "open, non-free". Which I would think most people would consider proprietary. I could be wrong though. Can I write and sell software that reads and writes DNG format without having to sign an agreement or pay Adobe money?

erichocean 10y ago
> Can I write and sell software that reads and writes DNG format without having to sign an agreement or pay Adobe money? I believe the answer is: yes, you can. The DNG patent license is here: https://helpx.adobe.com/photoshop/digital-negative.html https://helpx.adobe.com/photoshop/digital-negative.html You do not need to "sign anything" or "pay Adobe money" to make use of it. It's no different (in terms of usage) than someone open sourcing API documentation with an Apache license (or whatever).
- comex 10y ago
  Looking at the patent license, it applies "solely to permit the reading and writing of image files that comply with the DNG Specification". So if you try to create a derivative/modified format based on DNG for whatever reason, the patent license won't apply since the new format would not comply with the specification. (Though that doesn't necessarily mean there's actually a patent threat - hard to say without research what actual patents Adobe owns that apply to the specification, and when they expire or expired.) Also, the specification document itself is not under an open copyright license, so the spec for the modified format would have to be written from scratch (though it could refer to the original). Not sure if there is much reason to fork the DNG spec in practice, but still the situation is fairly different from "open sourcing API documentation with an Apache license".
  - Dylan16807 10y ago
    That seems fair though. When it comes to the DNG standard, you can use all this stuff freely. When it comes to another standard, make your own. I wouldn't call it proprietary.

by 1_2__3 10y ago

erichocean 10y ago

> Can I write and sell software that reads and writes DNG format without having to sign an agreement or pay Adobe money? I believe the answer is: yes, you can. The DNG patent license is here: https://helpx.adobe.com/photoshop/digital-negative.html https://helpx.adobe.com/photoshop/digital-negative.html You do not need to "sign anything" or "pay Adobe money" to make use of it. It's no different (in terms of usage) than someone open sourcing API documentation with an Apache license (or whatever).

comex 10y ago
Looking at the patent license, it applies "solely to permit the reading and writing of image files that comply with the DNG Specification". So if you try to create a derivative/modified format based on DNG for whatever reason, the patent license won't apply since the new format would not comply with the specification. (Though that doesn't necessarily mean there's actually a patent threat - hard to say without research what actual patents Adobe owns that apply to the specification, and when they expire or expired.) Also, the specification document itself is not under an open copyright license, so the spec for the modified format would have to be written from scratch (though it could refer to the original). Not sure if there is much reason to fork the DNG spec in practice, but still the situation is fairly different from "open sourcing API documentation with an Apache license".
- Dylan16807 10y ago
  That seems fair though. When it comes to the DNG standard, you can use all this stuff freely. When it comes to another standard, make your own. I wouldn't call it proprietary.