https://bugs.kde.org/show_bug.cgi?id=509279
Bug ID: 509279
Summary: Why are some metadata updated "automatically" ?
Classification: Applications
Product: digikam
Version First 8.7.0
Reported In:
Platform: Microsoft Windows
OS: Microsoft Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Maintenance-Metadata
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
I noticed that when I add a tag to a picture, several Metadata are changed, and
I don't understand why.
For example, for a picture to which I added the Subject Party:
Original
Updated
Composite:HyperfocalDistance 3.22 m
3.24 m
Composite:ScaleFactor35efl 4.4
4.3
ExifIFD:BrightnessValue -5.454663662
-5.454663633
ExifIFD:ComponentsConfiguration Y, Cb, Cr, -
ExifIFD:FlashpixVersion 100
ExifIFD:LensInfo
2.220000029-5.960000038mm f/1.6-2.2 2.220000029-5.96mm f/1.6-2.2
IFD0:YCbCrPositioning Centered
QuickTime:MediaDataSize 1774314
1772898
System:FileModifyDate 2025:08:19 21:02:43+02:00
2025:08:21 18:11:09+02:00
System:FileName IMG_2437_2.HEIC
IMG_2437.HEIC
System:FileSize 1810 kB
1809 kB
XMP-dc:Subject Party
XMP-mwg-rs:RegionAppliedToDimensionsH 3024
XMP-mwg-rs:RegionAppliedToDimensionsUnit pixel
XMP-mwg-rs:RegionAppliedToDimensionsW 4032
XMP-mwg-rs:RegionAreaH 0.142523383
XMP-mwg-rs:RegionAreaUnit normalized
XMP-mwg-rs:RegionAreaW 0.106892535
XMP-mwg-rs:RegionAreaX 0.853608981
XMP-mwg-rs:RegionAreaY 0.546550853
XMP-mwg-rs:RegionExtensionsAngleInfoRoll 370
XMP-mwg-rs:RegionExtensionsAngleInfoYaw -41
XMP-mwg-rs:RegionExtensionsConfidenceLevel 0
XMP-mwg-rs:RegionExtensionsFaceID 1
XMP-mwg-rs:RegionType Face
Discussing with the Exiftool team, it seems that this should not happen if
using Exiftool update command simply.
STEPS TO REPRODUCE
1. Export metadata of a picture that was never manipulated using "exifTool
-args -G1" command
2. Add a tag to a picture
3. Export metadata of a picture that was never manipulated using "exifTool
-args -G1" command - notice all metadata that differ
OBSERVED RESULT
Several metadata related to the camera (lens, brightness...) are updated, while
only a tag was added
EXPECTED RESULT
Only the tag should be added, other metadata should not change
SOFTWARE/OS VERSIONS
Windows: X
ADDITIONAL INFORMATION
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