Dear all,
I have a JPEG image which colorspace is CMYK and it has no Exif information.
When I use Photoshop open it, I can see its resolution is 600DPI. I also can
read its resolution by right-click it in Windows Explorer, then select menuitem
"Properties", then switch to tab "Summary", at last click button "Advanced".
I have to read its resolution in my Java application. I've tried several
imaging tools/libraries like JAI Image/IO Tools, Apache FOP, Apache Sanselan,
iText, but I always failed.
for Sanselan, the test code is as follows:
try {
File file = new File("C:/hs8mm.jpg");
ImageInfo imageInfo = Sanselan.getImageInfo(file);
System.out.println(imageInfo.getPhysicalWidthDpi());
} catch (ImageReadException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (BadElementException e) {
e.printStackTrace();
}
The output is -1.
Is there another way to read the resolution? Thanks for any help.
Regards,
George
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