问题
I have an name card scanner app to help in create new contacts which follows the following steps:
- User take a picture
- User crop the picture
- System shows user cropped image to confirm the crop
- System retrieve cropped picture and run OCR
- System takes OCR results and populate into the contacts fields (eg, Name, Phone number, Address, etc)
- User can edit and save contact.
However. now I hope to increase the accuracy of the OCR process to produce better results for the OCR scan.
I have heard of this process which binarize the image and makes it more accurate for the OCR scan.
I am trying to to send my image into this new process in step 3, where system shows user cropped and already binarised image to confirm crop.
After some research, I have found several methods like TextCleaner, ImageMagick and several others. However, I cannot find an implementation on Android. This closest I got is from this link: Binarize Image in Android
However I cannot make the answers from that question work in my codes. I am currently using Android Studio 1.5.1.
My codes are gathered from this link: https://github.com/TheWall89/AndrOCR
来源：https://stackoverflow.com/questions/35568362/binarize-image-before-ocr-scan