Introduction

To achieve the localize deinking, we built a system that can detect the ink on the paper and using red light LED matrix to stimulate the yeast in some specific locations to produce enzymes. The paper will be photographed and sent to computer before we spread the yeast on it. Our image process program using OpenCV function library to decode the JPG image file and do the edge offset, then decide which area have ink. After the LED matric data be calculated, the program using RS-232 serial communication standard sends this data to Arduino. Arduino collects the data and then sends it to Max7219 microcontroller to light up the LED matrix to stimulate the yeast produce enzymes. The system accepts any shape of paper which is under the size of the device, and the device can be easily scale up by connecting more led matric. This shows the possibility of factory scale localize deinking.