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https://issues.apache.org/jira/browse/IMAGING-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14176246#comment-14176246
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Damjan Jovanovic commented on IMAGING-139:
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with exiftool -a -g -u /path/to/250dpi.jpg I get:
---- JFIF ----
JFIF Version : 1.01
Resolution Unit : None
X Resolution : 1
Y Resolution : 1
so that 250 must be some kind of default in the other application?
And we should really deal with Resolution Unit = None properly, by returning
PixelDensity instead of inches/etc.
> Invalid DPI value
> ------------------
>
> Key: IMAGING-139
> URL: https://issues.apache.org/jira/browse/IMAGING-139
> Project: Commons Imaging
> Issue Type: Bug
> Components: Format: JPEG
> Affects Versions: 0.97
> Reporter: prabu
> Attachments: 250dpi.jpg
>
>
> I have following code in my java program
> final String IMAGE_PATH = "c:\\test\\250dpi.jpg";
> byte imageBytes[] = readImageBytes(IMAGE_PATH);
> final ImageInfo imageInfo = Sanselan.getImageInfo(imageBytes);
> final int physicalWidthDpi = imageInfo.getPhysicalWidthDpi();
> final int physicalHeightDpi = imageInfo.getPhysicalHeightDpi();
> System.out.println("physicalWidthDpi:"+physicalWidthDpi);
> When i right click image it showing 250 DPI value,but above program returning
> DPI value -1.
> Not sure why?Can u please help how to get image correct DPI value.
> Attached image for your reference.
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