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Feature extraction device, feature extraction method and image processing device

A feature extraction and image technology, applied in image data processing, image analysis, instruments, etc.

Active Publication Date: 2016-08-03
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the conventional technology has a problem that it is impossible to perform object detection with high accuracy unless the noise levels of the captured images are not substantially the same for all the learning images and target images.

Method used

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  • Feature extraction device, feature extraction method and image processing device
  • Feature extraction device, feature extraction method and image processing device
  • Feature extraction device, feature extraction method and image processing device

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Embodiment Construction

[0049] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0050] figure 1 It is a system configuration diagram showing the configuration of an object detection system including a feature extraction device according to an embodiment of the present invention. figure 1 The structure of each device is also shown together in figure.

[0051] figure 1 Among them, the object detection system 100 includes a classifier learning device 200 , a classifier storage device 300 , and an object detection device 400 . The classifier learning device 200 and the object detection device 400 are respectively connectable to the classifier storage device 300 via a communication network (not shown) such as the Internet, for example.

[0052] In the classifier learning apparatus 200, a boosting method (Boosting) is used as a machine learning method. The classifier learning device 200 learns a classifier for detecting an object to be de...

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Abstract

The present invention provides a feature extraction device capable of extracting image features using local binary patterns and capable of object detection robust to changes in shooting environments. The feature extraction unit (440) includes: a binary pattern generation unit (443), for each pixel in all or part of the pixels of the image, whether the difference between the pixel value represented by the bit value and the surrounding nearby pixels is A local binary pattern above a predetermined threshold; a weight generating unit (444), for each generated local binary pattern, determines a weight corresponding to a difference of a basic pixel value; and a histogram generating unit (445), which The determined weights are applied to the corresponding LBPs, and a histogram representing the distribution of LBPs generated from the image is generated.

Description

technical field [0001] The present invention relates to a feature extraction device for extracting image features from image data, a feature extraction method, a feature extraction program, and an image processing device using the feature extraction device. Background technique [0002] Conventionally, a process of extracting image features from image data to detect or recognize objects contained in the image (hereinafter referred to as "object detection") has been widely performed. As one technique of object detection, for example, Non-Patent Document 1 describes a technique using a Local Binary Pattern (LBP: Local Binary Pattern) (hereinafter referred to as “conventional technique”). [0003] The local binary mode is a binary mode obtained by binarizing and arranging the brightness difference between each pixel and the surrounding pixels for each pixel. According to the local binary mode, the grayscale mode contained in the image can be extracted . [0004] In the prior ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06V10/50G06V10/36
CPCG06V10/467G06V10/50G06V10/36G06V40/171
Inventor 曹芸芸西村洋文S.普拉纳塔Z.牛
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD