Hi, so what got me wondering was a one .HEIF picture that activated the HDR mode on my iPhone and I suppose that it's got to do with the metadata the picture has.
So I thought why not try to turn other pictures into HDR, just to see what kind of results it would yield. As a curiosity project
The problem lies in my skills with this tool. I found some code exiftool -TagsFromFile srcimage.jpg "-all:all>all:all" targetimage.jpg that I thought would do the trick but it didn't work for some reason.
I think that at least these lines are necessary to copy from the metadata to the fake hdr picture:
Color Primaries : BT.2020, BT.2100
Transfer Characteristics : SMPTE ST 2084, ITU BT.2100 PQ
Matrix Coefficients : BT.2020 non-constant luminance, BT.2100 YCbCr
I have embedded the file that shows as HDR in my iPhone so that if you guys know any better or could help me figure this stuff out I'd appreciate it a lot!
My guess is that HDR mode is activated if the image is deeper than 8 bits. The HIF you attached is 10 bits deep. This isn't something you can change with just metadata.
- Phil
Quote from: Phil Harvey on September 21, 2022, 02:34:37 PMMy guess is that HDR mode is activated if the image is deeper than 8 bits. The HIF you attached is 10 bits deep. This isn't something you can change with just metadata.
- Phil
I tried to view another 10-bit image but it doesn't show up as HDR. I even put the embedded color space as Rec.2100 PQ but it didn't help either. I wonder what triggers it correctly