Device, method, and computer-readable medium for detecting changes in objects in images and their features

• US 20060188160A1
• Filed: 12/20/2005
• Published: 08/24/2006
• Est. Priority Date: 10/31/2000
• Status: Abandoned Application

• Current Assignee: Nobuyuki Matsumoto, Takashi IDA
• Original Assignee: Nobuyuki Matsumoto, Takashi IDA
• Inventors: Ida, Takashi, Matsumoto, Nobuyuki
• Application Number:
  US11/311,483
• Publication Number:
  US 20060188160A1
• Time in Patent Office: Days
• US Class Current: 382/190
• CPC Class Codes: G06T 2207/20164 Salient point detection; Corner detection
• CPC Class Codes: G06T 7/12 Edge-based segmentation
• CPC Class Codes: G06T 7/174 involving the use of two or more images
• CPC Class Codes: G06T 7/246 using feature-based methods, e.g. the tracking of corners or segments
• CPC Class Codes: G06T 7/254 involving subtraction of images
• CPC Class Codes: G06V 10/44 Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
• CPC Class Codes: G06V 10/752 Contour matching

Abstract

A feature pattern (e.g., contours of an object) of an input image to be processed is extracted. A feature pattern (e.g., contours of an object) of a reference image corresponding to the input image is extracted. A comparison is made between the extracted feature patterns of the input and reference images. Their difference is output as the result of the comparison.

Claims

1. An image processing method comprising:

extracting a feature pattern from an input image that depicts an object;

extracting a feature pattern from a reference image corresponding to the input image, the reference image being generated in advance of the input image; and

comparing the extracted feature pattern of the input image and the extracted feature pattern of the reference image to detect a change in the object.