Patent ID: 9029753
Filing Date: 2015-05-12
Classification: H01L,H04N

Abstract:
1. An optical recognition method, comprising the steps of: (1) starting the optical recognition; (2) proceeding a long exposure and a short exposure, and producing a long exposure signal and a short exposure signal, respectively; (3) reading out the short exposure signal; (4) comparing the short exposure signal with a threshold voltage V (5) defining the short exposure signal as a highly-illuminated pixel; (6) using a single-slope analog-to-digital converter to digitize the highly-illuminated pixel, then going to step (9); (7) reading out the long exposure signal; (8) using the single-slope analog-to-digital converter to digitize the long exposure signal; (9) producing an image and processing the image; and (10) ending the optical recognition, wherein in step (9), the image is processed based on the following equation: wherein I