Human body vein image feature extraction method
A vein image and feature extraction technology, which is applied in the field of identity recognition, can solve problems such as redundant information, insufficient identification information, and difficult selection of Gabor filter parameters, and achieve the best experimental results and the effect of eliminating noise
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0035] A method for extracting features of a human vein image provided in this embodiment includes collecting and establishing a human vein image into a coordinate system, and then extracting vein direction features through a direction filter. The method of extracting vein direction features through a direction filter is adopted Radon transform performs convolution operation on the image established in the coordinate system to extract vein image features. The overall process of feature extraction is as follows:
[0036] (1) Set the distance function:
[0037] d = round ( ( i - i 0 ) 2 + ( j - j ...
Embodiment 2
[0047] The feature extraction method of a human vein image provided in this embodiment, in order to conform to the neighborhood of the distance function, and ensure that the number of pixels contained in the k direction filter is the same, and use as few directions as possible, ensure that the direction Recognition degree, extract as much direction information as possible to improve the recognition rate, when constructing k directions, select six direction intervals, of which:
[0048] Direction 0 is 0 degrees;
[0049] The angle of direction 1 belongs to the interval [30, 31.875], that is, ((22.5+30) / 2+(30+45) / 2) / 2=31.875;
[0050] Direction 2 is within the interval [58.125, 60], that is, ((45+60) / 2+(60+67.5) / 2) / 2=58.125;
[0051] Direction 3 is 90 degrees;
[0052] Similarly, direction 4 is within the [120, 121.875] degree interval;
[0053] Direction 5 is within the interval [148.125, 150].
[0054] The above scheme meets the following two objectives 1 and 2:
[0055] ...
Embodiment 3
[0067] The feature extraction method of a human vein image provided in this embodiment is to extract more direction information that is more in line with the real structure of the vein, perform a direction index operation on the image after the convolution operation, and generate a response image, that is, the direction map feature matrix , and convert the direction index into log 2 (K) the number of bits; the final pattern feature matrix is used as a database template to construct a vein database.
[0068] The pattern feature matrix is expressed as:
[0069] Energy [ L k ] = Σ ( i , j ) ∈ L k f [ i , j ]
[0070] In the collect...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com