How to Find High DPI of image copy

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Hello Friends

I am developing software for image process.To view images from local drive i am using picture box tool in c# windows application and i have scanned application form with photo copy of that applicant in my local drive.I need to crop photo of applicant systematically so i need to find that applicant photo form image copy how can we do this please help me.....

Posted 31-May-12 2:10am

ngnagarajan

Updated 31-May-12 2:17am

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Tim Corey · Answer 1 · 2012-05-31T02:24:00

Based on your question, it looks like you want to find a smaller picture inside a larger picture and then you want to crop the image to be just the smaller image inside.

To start with, here is a great CP article on how to work with images (including cropping):
Image Processing using C#[^]

To find that smaller image, if you don't know the coordinates and you don't want the user to draw a box on the screen to indicate the coordinates (which would be best, by the way), you could try to find the right place by looking for a particular pattern of pixels (say a box around the picture). Here is a post that might have some useful code that you could start from:
http://www.dreamincode.net/forums/topic/201783-c%23-trying-to-find-a-smaller-image-inside-a-larger-image-need-help/[^]