Patent · US Active

Rotation invariant object feature recognition

US9830528B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

Axis AB · SE

Inventors

Jiandan Chen · Lund, SE
Anders Lloyd · Lund, SE
Niclas Danielsson · Lund, SE

Key dates

Filing date	Dec 9, 2015
Grant date	Nov 28, 2017
Priority date	—
Expiry date	Jan 11, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG06V10/40
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method may include determining a value indicative of an average intensity of blocks in an image. The blocks include a primary and outer blocks. Each of the outer blocks may have three, five, or more than five pixels. The image may describe an external pixel lying between the primary and at least one of the outer blocks. The external pixel may not contribute to the value indicative of the average intensity of any of the blocks. The image may also describe a common internal pixel lying within two of the blocks. The common pixel may contribute to the value indicative of the average intensity of the two of the blocks. The method may include comparing the value indicative of the average intensity of the primary block to the values of the outer blocks, and quantifying a feature represented by the image by generating a characteristic number.

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