[IMAGING-299] updateExifMetadataLossless making more changes than requested

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.0-alpha2
• Component/s: Format: JPEG

Environment

Maven Dependency: 

<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-imaging</artifactId>
  <version>1.0-alpha2</version>
</dependency>

MacOS 11.3 using 

openjdk version "15.0.2" 2021-01-19
OpenJDK Runtime Environment AdoptOpenJDK (build 15.0.2+7)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 15.0.2+7, mixed mode, sharing)

I've attempted to attach the original image, but upload fails. Do you accept 1.7MB jpegs?

• Assignee: Unassigned
• Reporter: Paul Williams
• Created: 03/May/21 09:59
• Updated: 03/May/21 10:06

Description

Using the below code based on provided sample doesn't just remove the TIFF_TAG_MODEL field, but moves its value to another tag, and further relocates GPS Version ID.

FileUtils.copyFile(src, dst);

try (FileOutputStream fos = new FileOutputStream(dst);
     OutputStream os = new BufferedOutputStream(fos)) {

    final ImageMetadata metadata = Imaging.getMetadata(src);
    final JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
    final TiffImageMetadata exif = jpegMetadata.getExif();
    final TiffOutputSet outputSet = exif.getOutputSet();
    final TiffOutputDirectory exifDirectory = outputSet.getRootDirectory();
        exifDirectory.removeField(TiffTagConstants.TIFF_TAG_MODEL);
    new ExifRewriter().updateExifMetadataLossless(src, os,
            outputSet);
}

The resultant diff from Exiftool is:

diff a.txt b.txt 
2c2
< [System]        File Name                       : a.jpg
---
> [System]        File Name                       : b.jpg
5,7c5,7
< [System]        File Modification Date/Time     : 2021:05:03 09:34:28+00:00
< [System]        File Access Date/Time           : 2021:05:03 09:34:29+00:00
< [System]        File Inode Change Date/Time     : 2021:05:03 09:34:28+00:00
---
> [System]        File Modification Date/Time     : 2021:05:03 09:34:43+00:00
> [System]        File Access Date/Time           : 2021:05:03 09:34:43+00:00
> [System]        File Inode Change Date/Time     : 2021:05:03 09:34:43+00:00
23d22
< [IFD0]          Camera Model Name               : NIKON D90
67d65
< [GPS]           GPS Version ID                  : 2.3.0.0
74c72
< [IFD1]          Thumbnail Offset                : 1514
---
> [IFD1]          Thumbnail Offset                : 1372
134a133
> [XMP-exif]      GPS Version ID                  : 2.3.0.0
136a136
> [XMP-tiff]      Camera Model Name               : NIKON D90

I can not attach the 1.7MB jpeg that has this issue. A smaller lower resolution version of the same image results in different output