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ExifTool Forum

ExifTool => The "exiftool" Application => Topic started by: felixarch on March 28, 2023, 07:49:42 AM

Title: Extract Depth Maps from iPhone Portrait Mode Photos
Post by: felixarch on March 28, 2023, 07:49:42 AM
Hi all,

I am currently toying around with depth images and photogrammetry and wanted to extract the depth maps from iPhone (LiDAR-)Photos shot in Portrait mode. I know that the command is something like this

Code Select
exiftool -b -DepthImage IMG_20210420_155329.jpg > depth.jpg
or

Code Select
exiftool -b -MPImage2 IMG_XXXX.jpg > IMG_XXXX_depth.jpg
but anytime I try these commands, they'll return a file with 0kb.

Is there anything I am doing wrong? Or did Apple change the way how depth data is stored?

Thanks for your help!
Title: Re: Extract Depth Maps from iPhone Portrait Mode Photos
Post by: Phil Harvey on March 28, 2023, 12:53:46 PM
No idea.  Run ExifTool without any parameters to see what metadata exists in the file.  DepthImage and MPImage2 will appear in this output if they exist.

- Phil
Title: Re: Extract Depth Maps from iPhone Portrait Mode Photos
Post by: felixarch on March 29, 2023, 09:40:38 AM
Thanks Phil, I did list all metadata with exiftool and found out that iPhone portrait mode images have up to 8 layers with various masks and the last layer is the Depth Map. So the depth maps are stored in MPImage8 for the front camera and MPImage3 for the rear camera.
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