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Extraction method for brightness characteristic quantity of feature image and recognition method for feature image

A feature image and extraction method technology, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as rough correction methods, low efficiency, and inaccurate final brightness values, and achieve the effect of improving efficiency

Active Publication Date: 2013-01-23
GUANGDONG LVAN IND & COMMERCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the existing technology, the correction method is rough, the final brightness value is not accurate enough, and the correction is performed for each pixel, and the efficiency is too low.

Method used

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Embodiment Construction

[0044] The present invention will be described in detail below by embodiment:

[0045] The characteristic image recognition system is utilized in the method for extracting the brightness feature quantity of the characteristic image provided by the present invention. The feature recognition system can determine whether the person to be identified is one of the registered persons by comparing the stored feature with the feature to be checked. The feature image recognition system includes: an image storage unit, an adjustment and cutting unit, a labeling unit, a brightness feature extraction unit, and a storage unit. The functions of these units are described below.

[0046] However, the feature image obtained by the camera will have brightness differences due to changes in skin color and external light, and this difference may cause recognition failures. Therefore, it is necessary to pay special attention to the brightness feature of the feature image, so it is necessary to pr...

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Abstract

The invention relates to an extraction method for brightness characteristic quantity of a feature image, which is used for extracting brightness characteristic quantity by utilizing a feature image recognition system. The extraction method comprises the steps of inputting, adjustment, position marking, extraction and storage, wherein the extraction step comprises recognition, a first comparison, a second comparison, calculation and determination, wherein in the recognition step, recognizing the brightness value of each pixel in each position image; and in the determination step, orderly extracting another pixel besides the target pixel group as the target pixel, and repeating the first comparison step, the second comparison step and the calculation step until all the pixels in the position image acquire the brightness characteristic values. The precise image brightness characteristic quantity with high efficiency is quickly obtained by using the extraction method for brightness characteristic quantity of the feature image.

Description

technical field [0001] The invention relates to a method for extracting feature quantities of feature images, in particular to a method for extracting brightness feature quantities of facial images. Background technique [0002] In recent years, a practical method for identifying a person's identity using characteristic patterns captured by a camera, such as a face, has been proposed. A commonly used matching method is to calculate the similarity by, for example, performing recognition processing such as standardized correlation between the pre-set registration image and the processing target image, and finally judge whether the person to be recognized is already A person pre-registered in the identification system. [0003] When providing face recognition using this matching method in a real-time environment (such as a security system), there is a possibility that the contrast of the image will vary greatly due to changes in the weather or the time of day, and even produce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46G06K9/62G06K9/00
Inventor 周庆芬
Owner GUANGDONG LVAN IND & COMMERCE CO LTD