low image quality

[s-kris]

thanks for the library. However, the quality of the cropped image is very low (custom & resizable crop). If it helps, i'm using the cropped image for OCR using Tesseract. Upon The cropped image TOCR gives some vague symbols and just 1or 2 digits. If the apple's default picker is used, the OCR works perfectly.
Can you provide any help? Thanks.

Edit1: Forgot to mention, I modified the GKImagePicker.m to capture a new photo instead of choosing from library.
ps:
I'm using the latest version of library. I already read the issues #7, #11, #12, #32.