func Rectangle(image *IplImage, pt1, pt2 Point, color Scalar, thickness, lineType, shift int) {
C.cvRectangle(
unsafe.Pointer(image),
pt1.AsCvPoint(),
pt2.AsCvPoint(),
C.CvScalar(color),
C.int(thickness),
C.int(lineType),
C.int(shift))
}
func Circle(image *IplImage, center Point, radius int, color Scalar, thickness, lineType, shift int) {
C.cvCircle(
unsafe.Pointer(image),
center.AsCvPoint(),
C.int(radius),
C.CvScalar(color),
C.int(thickness),
C.int(lineType),
C.int(shift),
)
}