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.

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.

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