High precision palm print recognition method based on two-dimensional quadrature Log-Gabor filtering
A palmprint recognition, high-precision technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as easy to be forgotten, cracked, easily lost, damaged, etc.
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Embodiment 1
[0037] A kind of embodiment of the present invention is, based on the high-precision palmprint recognition method of two-dimensional orthogonal Log-Gabor filter, its step is:
[0038] a. Palmprint image preprocessing: Use the edge tracking algorithm to obtain the corner points formed between the index finger and middle finger, ring finger and little finger of the original palmprint image, and use these two corner points to correct the palmprint image, and then cut out the center of the palmprint image A rectangular image block I with a size of 128×128 pixels;
[0039] b. Two-dimensional orthogonal Log-Gabor filter: use two-dimensional orthogonal Log-Gabor filters in two directions to form a two-dimensional orthogonal Log-Gabor filter OLG(f, θ, θ 0 , σ θ , f 0 , σ f ):
[0040] OLG ( f , θ , θ 0 , σ θ ...
Embodiment 2
[0067] The method of this example is basically the same as that of Example 1, the difference is only that when matching and identifying, the sampling factor ρ(4×4) is not used for down-sampling, but the Hamming distance matching algorithm is directly used for POPF 1 and POPF 2 Match and get the matching result. The method in this example is better than the method in Embodiment 1, but the amount of calculation is increased.
[0068] The two-dimensional orthogonal Log-Gabor filter OLG of the present invention (f, θ, θ 0 , σ θ , f 0 , σ f ) parameter θ 0 , σ θ , f 0 , σ f , except that 0.73304, 1.046, 0.02994, 0.6633 can be taken respectively; other values close to it can also be taken, but the recognition accuracy will be reduced.
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