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EXIF improvements and bugfixes

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- Fixes a writing issue for float values ​​less than 1
- Fixes a missing definition of `EXIF_DATETIMEDIGITIZED` tag
- Adds support for some common camera shot metadata
- Adds missing metadata to writing tests

The following plugins automatically gain support for the new metadata: AVIF, IFF, HEIF, JXL, JXR, PSD and TGA (V2E).

The new metadata added with this patch is usually saved by smartphones (e.g. iPhone or Google Pixel).
This commit is contained in:
Mirco Miranda
2026-04-26 06:08:25 +02:00
parent 51db11eefc
commit 191e5e6a69
7 changed files with 559 additions and 13 deletions
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23
README.md
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@@ -155,8 +155,31 @@ About the image:
- `Owner`: Name of the owner of the image.
- `Software`: Name and version number of the software package(s) used to
create the image.
- `Speed`: Floating-point number indicating the speed of GPS receiver
movement in Km/h (e.g. 30.2).
- `Title`: The title of the image.
About the shot:
- `DigitalZoomRatio`: Floating-point number indicating the digital zoom ratio
when the image was shot.
- `ExposureMode`: Integer number indicating the exposure mode set when the
image was shot as reported in the EXIF ​​specifications.
- `ExposureProgram`: Integer number indicating the class of the program used
by the camera to set exposure when the picture is taken as reported in the
EXIF ​​specifications.
- `ExposureTime`: Floating-point number indicating the exposure time,
given in seconds (s).
- `Flash`: Integer number indicating the status of flash when the image
was shot as reported in the EXIF ​​specifications.
- `FNumber`: Floating-point number indicating the F number.
- `FocalLength`: Floating-point number indicating the actual focal length
of the lens, in millimeters (mm).
- `ISOSpeedRatings`: Integer number indicating the sensitivity of the camera
or input device when the image was shot as reported in the EXIF
​​specifications.
- `WhiteBalance`: Integer number indicating the white balance mode set when
the image was shot as reported in the EXIF ​​specifications.
About the camera:
- `Manufacturer`: The manufacturer of the recording equipment.
- `Model`: The model name or model number of the recording equipment.