Palm print identification method based on projection operator and wavelet transform

A wavelet transform and projection operator technology, applied in the field of palmprint recognition, can solve problems such as affecting the practicability of the method

Inactive Publication Date: 2016-08-24
北京京航计算通讯研究所
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Problems solved by technology

However, in the feature extraction method based on subspace, the dimension of the featur

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  • Palm print identification method based on projection operator and wavelet transform
  • Palm print identification method based on projection operator and wavelet transform
  • Palm print identification method based on projection operator and wavelet transform

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Embodiment Construction

[0016] The present invention is described in detail below in conjunction with embodiment:

[0017] A palmprint recognition method based on projection operator and wavelet transform, it comprises the following steps:

[0018] The first step is to construct the palmprint database;

[0019] Second step, carry out wavelet transform to the image in the palmprint database;

[0020] The third step is to use the wavelet transformed palmprint data to construct the null space of the projection operator;

[0021] The fourth step is to use the singular value decomposition method to obtain the discriminant projection of the space;

[0022] The fifth step is to extract the features of the palmprint data by using the discriminant projection to obtain the palmprint database after dimensionality reduction;

[0023] In the sixth step, the dimensionality reduction of the palmprint image to be tested is performed by using discriminant projection after wavelet transformation, and then the dimen...

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Abstract

The invention belongs to a palm print identification method based on subspace characteristic extraction and especially relates to a palm print identification method based on a projection operator and a wavelet transform. The method comprises the following steps of constructing a palm print database; carrying out the wavelet transform on an image in the palm print database; using palm print data after the wavelet transform to construct a null space of the projection operator; using a singular value decomposition method to calculate a discriminating projection of the space; using the discriminating projection to carry out characteristic extraction on the palm print data so as to obtain the palm print database after dimension reduction; after the wavelet transform is performed on a palm print image to be tested, using the discriminating projection to carry out dimension reduction, and then using the palm print database after the dimension reduction and using a nearest neighbor classifier to classify a sample to be tested after the dimension reduction. The method has advantages that certain robustness is possessed; the method is insensitive to changes of palm print image illumination; the projection operator is used and a space decomposition property is possessed; a dimension of a decomposed subspace is fixed so that a condition that a characteristic dimension is selected by a person in other methods is avoided.

Description

technical field [0001] The invention belongs to a palmprint recognition method based on subspace feature extraction, in particular to a palmprint recognition method based on projection operator and wavelet transform. Background technique [0002] At present, people's work and life are more and more inseparable from identification and identity verification. As a new identification technology, palmprint recognition technology has received more and more attention. How to represent palmprints is a difficult point and a hotspot in palmprint recognition. Effective representation of palmprint is the key to improve the performance of palmprint recognition technology, and the feature extraction method based on subspace is one of the effective methods to represent palmprint. It is supported by statistical theory and has achieved good results. However, in the feature extraction method based on subspace, the dimension of the feature generally needs to be set artificially, which affects...

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Application Information

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IPC IPC(8): G06K9/00G06K9/62
Inventor 赵峰徐均杨灵运刘红义
Owner 北京京航计算通讯研究所
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