1. Scan barcode up to 3
2. Define target words to detect
3. Scan images and recognize the text from image and display
4. Compare the text to target words
5. If matched the text to target words, target word window will become green(exact match) or blue(excess match) and send the result to server
6. Store scanned image and window captured image in iPad, and send them to server
7. target word can be loaded from server