void cvImgToObs_DCT(CvArr* arr, float* obs, CvSize dctSize, CvSize obsSize, CvSize delta) {
    void *fptr;

    fptr = dlsym(_Chcv_handle, "cvImgToObs_DCT_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return;
    }
    dlrunfun(fptr, NULL, cvImgToObs_DCT, arr, obs, dctSize, obsSize, delta);
}
