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From "FG (JIRA)" <j...@apache.org>
Subject [jira] Updated: (SANSELAN-37) Wrinting unmodified EXIF-Data to new image changes values
Date Sat, 06 Mar 2010 20:50:27 GMT

     [ https://issues.apache.org/jira/browse/SANSELAN-37?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

FG updated SANSELAN-37:
-----------------------

    Attachment: out.jpg
                src2.jpg
                src1.jpg

Input images and output image as it was created by my code.
Images were opened in Irfanview and resized to ~1x1 pixel to reduce the sample. Exif data
was preserved in the first image. src2 was saved via IrfanView with the option to remove all
EXIF data.

> Wrinting unmodified EXIF-Data to new image changes values
> ---------------------------------------------------------
>
>                 Key: SANSELAN-37
>                 URL: https://issues.apache.org/jira/browse/SANSELAN-37
>             Project: Commons Sanselan
>          Issue Type: Bug
>    Affects Versions: 0.94-incubator
>         Environment: Canon Powershot A570 IS
>            Reporter: FG
>         Attachments: out.jpg, src1.jpg, src2.jpg
>
>
> I used the following code, which just reads the EXIF data from a picture of a Canon Powershot
A570 IS and writes it back to another file without modifying it:
> File src1 = new File("c:/temp/src1.jpg");
> File src2 = new File("c:/temp/src2.jpg");
> File dst = new File("c:/temp/out.jpg");
> IImageMetadata metadata = Sanselan.getMetadata(src1);
> TiffImageMetadata exif = ((JpegImageMetadata) metadata).getExif();
> TiffOutputSet outputSet = exif.getOutputSet();
> OutputStream os = new BufferedOutputStream(new FileOutputStream(dst));
> new ExifRewriter().updateExifMetadataLossless(src2, os, outputSet);
> os.close();
> src1.jpg is a file with EXIF data
> src2.jpg is src1.jpg without EXIF data (saved it with IrfanView and unchecked the appropriate
checkboxes in the Jpeg Save Dialog) 
> out.jpg should contain the EXIF information after the code was run.
> Actually the EXIF data is not the same after the call.
> So, is there anything wrong with the above code or with the images or is
> this a bug in Sanselan?
> Tried the same with the image of a Sony Alpha 350. The effect was much less.
> I try to attach the images and exif data in the next step.

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