Defocus calibration module for light-sensing system and method thereof
A defocus calibration module is applied in a light-sensing system for sensing a measured object to generate a sensed image. The light-sensing system contains a light-emitting component, a focusing component, and an image sensor. The light-emitting component emits a detecting light to the measured object so that the measured object generates a reflecting light. The focusing component focuses the reflecting light to the image sensor, and the image sensor generates the sensed image according to the reflecting light. The defocus calibration module has a calibrating object for blocking a part of the detecting light and the reflecting light for forming images at a first and a second calibration imaging locations in the sensed image. In this way, the defocus calibration module calculates a defocus parameter representing the defocus level of the light-sensing system according to the first and the second calibration imaging locations, and accordingly calibrates the sensed image.
PixArt Imaging Inc.
G G H
G03B G03B H04N
inventional inventional inventional
Hui-Hsuan Wei-Chung
Chen Wang