int cvFindContours(CvArr* image, CvMemStorage* storage, CvSeq** first_contour, int header_size, int mode, int method, CvPoint offset) {
    void *fptr;
    int retval;

    fptr = dlsym(_Chcv_handle, "cvFindContours_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return -1;
    }
    dlrunfun(fptr, &retval, cvFindContours, image, storage, first_contour, header_size, mode, method, offset);
    return retval;
}
