// function calls some basic testing routines to test individual functions for correctness
void Dip4::test(void){
test_circShift();
cout << "Press enter to continue" << endl;
cin.get();
}
// function calls some basic testing routines to test individual functions for correctness
void Dip3::test(void){
test_createGaussianKernel();
test_circShift();
test_frequencyConvolution();
cout << "Press enter to continue" << endl;
cin.get();
}