Re: How to change resolution metadata of a lossy image format like JPEG without recompression?
Posted: Thu May 18, 2023 7:46 pm
Did you check: Always Add Exif?
GraphicConverter, CADintosh, …
https://www.lemkesoft.info/forum/
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☐ Add metadata structure to file(s) if needed
If the processed file has no metadata structure yet,
this option will add one, which is a necessity to store the resolution info.
The metadata structure is file format specific:
- JPEG: EXIF header
- WEBP: EXIF chunk towards the file end
- PNG: pHYs tag
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Per file: [ Try existing tag only. If inexistent nothing changes. ▾ ]
Try existing tag. If inexistent add JFIF or pHYs.
Try existing tag. If inexistent add Exif.
Always write Exif tag + JFIF for JPEGs and pHYs for PNGs