Incorrect PhysicalWidthDpi for JPEG image with resolution specified in dots per
millimeter
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Key: SANSELAN-70
URL: https://issues.apache.org/jira/browse/SANSELAN-70
Project: Commons Sanselan
Issue Type: Bug
Components: Format: JPEG
Affects Versions: 0.97
Environment: N/A
Reporter: Tars Joris
The value of physical with DPI is incorrect for JPEG images, which express
their resolution in dots per millimeter.
Two images are attached:
- example_ppi.jpg: Normal image, with resolution specified in dots per inch (72
pixels/in)
- example_ppmm.jpg: Same image, but with resolution specified in dots per
millimeter (2.8 pixels/mm)
When running the attached code, the output is
{code}
example_ppi.jpg
getPhysicalWidthDpi: 72
getPhysicalHeightDpi: 72
example_ppmm.jpg
getPhysicalWidthDpi: 11
getPhysicalHeightDpi: 71
{code}
While you'd expect the value 71 for getPhysicalWidthDpi for the second image.
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