How to crop image on camera preview “Goggles style” - Android

问题

I'm trying to make a small Android application that reads text from pictures. I've already implemented Tesseract tools for Android and I'm able to recognize text from pictures taken with camera. My current problem is that distance for taking picture is really strict. It's not really user friendly if users has to be at very exact distance from text (s)he's trying to read.

I was thinking that best way would do it like in Google Goggles where user is able to crop specific part of image (on camera preview) that (s)he likes to scan. Is there any ready custom cameras (couldn't find any) or have any of you done it?

Thanks, Lasse

回答1:

I'd figure that looking at the ZXing source code may be your best option. It has a specific focal point where it focuses on the main area of the bar code.

回答2:

The Android camera app has cropping code, it doesn't have many dependencies and it is fairly straightforward to integrate in your app. Checkout AOSP code and try it out.