How Could I extract HDR gain Map from iPhone's Heic?

Question

817 views Asked by taontech At 07 April 2022 at 02:53

with jpeg format, I know can use:

exiftool -b -MPImage2 test-lumen.jpg > depthMap.jpg

But if the format is Heic, there is any method can export the HDR gain Map?

There are 2 answers

**miric** · Answer 1 · 2022-05-31 17:34:16

miric On 31 May 2022 at 17:34

You can install (libheif) and do:

heif-convert <source_file>.HEIC <result_file>.jpg

It will save auxiliary images as well.

**hit.at.ro** · Answer 2 · 2023-07-07 05:47:35

hit.at.ro On 07 July 2023 at 05:47

You need to be able to extract Apple specific metadata first.

It's documented here: