Camera shake determination device, printing apparatus and...

Details Camera shake determination device, printing apparatus and... Camera shake determination device, printing apparatus and...

2011-04-12

2011-04-12

Lee, Thomas D (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S001900, C382S255000, C382S275000

Reexamination Certificate

active

07924468

ABSTRACT:
The device employs a plurality of coefficients recorded in image data to detect whether edges are included per block, and determines as the blur level the proportion of edges, among the detected edges, in which the edge width is over a certain threshold. The device also determines, per block, coordinates composed of a first coefficient value representing frequency components in a first direction in the blocks and a second coefficient value representing frequency components in a second direction perpendicular to the first direction, and calculates the extent of bias in the distribution of the coordinates as the ellipticity. The device determines whether or not blurring has been produced by camera shake in an image based on the relationship between the blur level and ellipticity which have thus been determined.

REFERENCES:
patent: 2005/0249429 (2005-11-01), Kitamura
patent: 2008/0008398 (2008-01-01), Tanaka et al.
patent: 2006-019874 (2006-01-01), None
patent: 2007-220009 (2007-08-01), None
Abstract of Japanese Patent Publication No. 2006-019874, Pub. Date: Jan. 19, 2006, Patent Abstracts of Japan.
Abstract of Japanese Patent Publication No. 2007-220009, Pub. Date: Aug. 30, 2007, Patent Abstracts of Japan.

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