Console application for verifying the DPI of images in a folder

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I have a folder having many images , where i need to verify the DPI of the images (wether 300 or not) . if its not 300, then it should convert it to 300 DPI. Using C# .net i have to do this. Can any one give me a solution

Posted 6-Oct-13 22:21pm

Praveen SKumar

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Sergey Alexandrovich Kryukov 7-Oct-13 4:26am

This is pretty easy, but http://whathaveyoutried.comso far?
And why would you need all those DPI? They are pretty much irrelevant to most imagine chores.
—SA

3 solutions

Solution 2

Load your image into a System.Drawing.Image. The fields HorizontalResolution and VerticalResolution give you DPI, so you need to check they are both 300.

You need to be clearer about what to do if the DPI is not 300. You could just set it to 300 which may cause the overall 'display size' to change, or you could resize it to preseve the size but then you might end up interpolating the pixels.

If it's just the first, I'd look at SetPropertyItem which I suspect will be able to do it, but I've never tried...

Posted 6-Oct-13 22:31pm

Rob Philpott

Solution 3

Thanks a lot guyz for your replies.

Posted 20-Oct-13 22:53pm

Praveen SKumar

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-10-06T22:28:00

Solution 1

Please see my comment to the question. If you really need it, please read:
http://msdn.microsoft.com/en-us/library/system.drawing.image.horizontalresolution.aspx[^],
http://msdn.microsoft.com/en-us/library/system.drawing.image.verticalresolution.aspx[^],
http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.setresolution.aspx[^].

—SA

Posted 6-Oct-13 22:28pm

Sergey Alexandrovich Kryukov

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Praveen SKumar 7-Nov-13 23:50pm

Helped me lot.
Thanks

Sergey Alexandrovich Kryukov 8-Nov-13 0:01am

My pleasure.
Good luck, call again.
—SA