Patent ID: 9049364
Filing Date: 2015-06-02
Classification: H04N

Abstract:
1. A focus adjusting method, comprising: capturing a digital image by an image sensor module comprising a lens unit; determining a region of interest (ROI) within the digital image; calculating a sharpness value corresponding to the digital image according to pixels in the ROI of the digital image; determining a number of steps and a direction for moving the lens unit according to the sharpness value; in response to the sharpness value which is in a first range, moving the lens unit by a first number of steps in a first direction, the first number and the first direction being derived from a linear relationship; in response to the sharpness value which is in a second range, moving the lens unit by a second number of steps in a second direction; and in response to the sharpness value which is in a third range, performing a focus scan adjustment of the lens unit; wherein the second number is predetermined.