The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2015
Filed:
Dec. 07, 2012
Apple Inc., Cupertino, CA (US);
Robin B. Jenkin, Morgan Hill, CA (US);
Eugene Lam, Milpitas, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
An in-focus lens position may be determined by computing a focus metric value, by counting the number of transition pixels for images of a target captured at different lens positions. Using as little as two frames to compute two focus metric values, a reasonable approximation of the in-focus lens position may be obtained. The approximation of the in-focus lens position may then be used as a starting point for a fine focus search process, to determine an in-focus lens position. An advantage here is that the focus metric values relate to the number of transition pixels and are easy to compute, and yield a reasonable approximation of the in-focus position with just a few frames. Other embodiments are also described.