Gabor core parameters in OpenCV
I have to use the Gabor filter in my application, but I do not mean these parameter values of the OpenCV methods. I want to encode the iris. Run the Gabor filter and get the functions (I want to do this for 12 sets of Gabor parameter values). Then I want to calculate Hamming dynamics and do authentication.
If someone can write parameter ranges here or a way to calculate them in a function:
Imgproc.getGaborKernel(new Size(kSize[j], kSize[j]), sigma, theta, lambda, gamma);
I'll be very thankful. Of course, I tried to appoint it myself, but to no avail.
Example file:
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1 answer
You can refer to this C ++ code for finding the Gabor Edge detector output for your image. I'm sure you can create a similar one in java too! Play with these values to find the type of kernel you want.
#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <math.h>
using namespace cv;
int pos_kernel_size=21;
int pos_sigma= 5;
int pos_lm = 50;
int pos_th = 0;
int pos_gamma= 0;
int pos_psi = 90;
Mat src_f;
Mat dest;
void Process(int , void *)
{
int kernel_size=(pos_kernel_size-1)/2;
Size KernalSize(kernel_size,kernel_size);
double Sigma = pos_sigma;
double Lambda = 0.5+pos_lm/100.0;
double Theta = pos_th*CV_PI/180;
double psi = pos_psi*CV_PI/180;;
double Gamma = pos_gamma;
Mat kernel = getGaborKernel(KernalSize, Sigma, Theta, Lambda,Gamma,psi);
filter2D(src_f, dest, CV_32F, kernel);
imshow("Process window", dest);
Mat Lkernel(kernel_size*20, kernel_size*20, CV_32F);
resize(kernel, Lkernel, Lkernel.size());
Lkernel /= 2.;
Lkernel += 0.5;
imshow("Kernel", Lkernel);
Mat mag;
pow(dest, 2.0, mag);
imshow("Mag", mag);
}
int main(int argc, char** argv)
{
Mat image = imread("Gabor.bmp",0);
cv::imshow("Src", image);
image.convertTo(src_f, CV_32F, 1.0/255, 0);
if (!pos_kernel_size%2)
{
pos_kernel_size+=1;
}
cv::namedWindow("Process window", 1);
cv::createTrackbar("Sigma", "Process window", &pos_sigma, pos_kernel_size, Process);
cv::createTrackbar("Lambda", "Process window", &pos_lm, 100, Process);
cv::createTrackbar("Theta", "Process window", &pos_th, 180, Process);
cv::createTrackbar("Psi", "Process window", &pos_psi, 360, Process);
cv::createTrackbar("Gamma", "Process window", &pos_gamma, 100, Process);
Process(0,0);
waitKey(0);
return 0;
}
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