Patent · US Active

Methods and systems for content-boundary detection

US9547799B2 · kind B2 · utility

7Cited by

41References

26Claims

0Family size

Assignee

Sharp Laboratories of America, Inc. · US

Inventors

Lawrence Shao-hsien Chen · Vancouver, US
John E. Dolan · Vancouver, US

Key dates

Filing date	Jul 17, 2008
Grant date	Jan 17, 2017
Priority date	—
Expiry date	Feb 28, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG06V10/243
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Aspects of the present invention are related to systems and methods for automatically determining the content boundaries in a digital image. A gradient field may be generated using an edge detector, and the gradient field may be thresholded, by magnitude, to retain strong edges. The resulting localized edge positions may be projected onto a first direction and a second direction to form two projection histograms. The projection histograms may be analyzed to determine the boundaries of the image content. Corners of a cropping rectangle may be computed, and the digital image may be cropped according to the content boundaries.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.