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:
Aug. 13, 2019
Filed:
May. 09, 2017
Apple Inc., Cupertino, CA (US);
David Makower, Milpitas, CA (US);
Paul A. Francis, Cupertino, CA (US);
Yu Chieh Lin, San Jose, CA (US);
APPLE INC., Cupertino, CA (US);
Abstract
Techniques are disclosed for estimating a source resolution of image data presented to a system. According to these techniques, input image data may be converted to a domain of frequency coefficients. Each coefficient may represent content of the input image along a respective pair of frequencies extending in two dimensions. For each set of frequency coefficients having a common frequency in one of the dimensions, zero crossings of coefficient values may be detected. The zero crossings may be counted at each frequency position in the second dimension. An estimate of the input image's source resolution may be estimated from a comparison of the zero crossings. For video, this process may be performed across images of an input video sequences.