Training device, training method and detection method

A technology of training device and training method, which is applied in the fields of instruments, character and pattern recognition, computer parts, etc., and can solve the problems of complex calculation, reducing the detection rate of classifiers, and reducing the detection rate.

CN101655914AInactive Publication Date: 2010-02-24SONY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-02-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a training device, a training method and a detection method. The training device comprises a sample acquiring unit, a feature extracting unit and a training unit, wherein the sample acquiring unit is used for acquiring an object image set and a background image set which have preset numbers; the feature extracting unit is used for extracting features of the object image setand the background image set acquired by the sample acquiring unit; the training unit is used for carrying out training by using the features extracted by the feature extracting unit so as to acquirea classifier; the features comprise a wavelet-like feature and a gradient orientation histogram feature; and the classifier adopts a specific cascading structure, combines a Haar-like feature with aHOG feature together for use, plays the advantages of quick calculation of the Haar-like feature and strong resolution of the HOG feature, and simultaneously improves the performance of the acquired classifier greatly without increasing the calculating cost obviously.
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Description

technical field

[0001] The invention relates to object detection technology, in particular to a training device, a training method and a detection method for determining whether an object exists in a static image or a video image and giving the position of the object in the image or video. Background technique

[0002] Techniques for object detection in images and videos use various features to train classifiers in an attempt to find the location and dimensions of objects of various sizes and appearances in images and videos. Taking cars as an example, car detection technology is a branch of the object detection field, and many technologies used for other object detection can also be used for car detection. The problems faced by car detection technology are diverse, for example: cars include various types (cars, trucks, buses, etc.), and there are subtle differences in appearance between cars; occlusion is also a very common problem. The problem of occlusion may occur in va...

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Embodiment Construction

[0055] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0056] Note that in the embodiment of the present invention, car detection is taken as an example, but the present invention is not limited to car detection, and can also be used for detection of other objects, such as human faces, human bodies, and so on.

[0057] figure 1 is a block diagram illustrating a training module according to the present invention.

[0058] The training device according to the present invention includes: a sample collection unit 102, which is used to collect a predetermined number of object image sets and background image sets; a feature extraction unit 104, which is used to extract the object image sets and background image sets collected...