Method to Evaluate Contrast Value for an Image and Applications Thereof
First Claim
Patent Images
1. A method to focus a camera, and the method comprisingperforming a focus operation in response to a contrast value of an image on an image sensing member formed by a lens;
- adopting a first method to seek and find an optimum contrast value of the image during the focus operation; and
adopting a second method to seek and find the optimum contrast value when the first method fails, wherein the first method is not equal to the second method.
0 Assignments
0 Petitions
Accused Products
Abstract
An image contrast evaluation method is disclosed. First, focusing is performed based on the contrast value of an image rendered by a lens on optical sensors, wherein the calculation of the contrast value comprises: selecting an area of the image, calculating the absolute value of brightness difference between each neighboring pixel, and selecting a specific value there from as the contrast value of the image based on a distribution of the calculated absolute values of the brightness differences.
-
Citations
5 Claims
-
1. A method to focus a camera, and the method comprising
performing a focus operation in response to a contrast value of an image on an image sensing member formed by a lens; -
adopting a first method to seek and find an optimum contrast value of the image during the focus operation; and adopting a second method to seek and find the optimum contrast value when the first method fails, wherein the first method is not equal to the second method. - View Dependent Claims (2, 3, 4, 5)
-
Specification