How to increase UIImage DPI taken from iPad Mini from 72 DPI to 300 DPI for OCR Scanning?

Question

Level 1

0 points

How to increase UIImage DPI taken from iPad Mini from 72 DPI to 300 DPI for OCR Scanning?

We are trying to get an accurate ocr scanning for MRZ using tesseract libraries. However we are getting incorrect results specially with character M (which usually comes out as H).

As going thru numerous blogs, the suggestion is to have a higher DPI image (300 dpi), but the image captured by IPAD Mini is only 72dpi. Can increasing the resolution provide better result. In which case, help in conversion to 300dpi will be greatly appreciated.

Is there an alternate solution for this issue that we are facing.

Posted on Jul 10, 2014 8:35 AM

Reply

Answer 1

ChrisJ4203

Level 10

230,347 points

Jul 10, 2014 8:37 AM in response to perry.d

You are in the Using iPhone forum. I will ask the hosts to move this to the iPad forum. However, I'm not aware of any setting change you can make to the cameras in the iPad or iPhone.

Reply

Answer 2

SergZak

Level 6

10,338 points

Jul 10, 2014 9:35 AM in response to perry.d

AFAIK, you cannot change the DPI setting of the internal camera.

Reply

Answer 3

perry.d Author

Level 1

0 points

Jul 10, 2014 11:02 PM in response to SergZak

Hello,

I don't want to change DPI setting of the internal Camera, After taking image from camera and displaying on UIImageView, I need to change DPI on that imageview.

Reply