func SubScalar(src *IplImage, value Scalar, dst *IplImage) {
	SubScalarWithMask(src, value, dst, nil)
}
func SubScalar(src *IplImage, value Scalar, dst *IplImage) {
	SubScalarWithMask(src, value, dst, nil)
}
func SubScalar ( src * IplImage , value Scalar , dst * IplImage ) { SubScalarWithMask ( src , value , dst , nil ) }
// Calculates the per-element difference between an array and a scalar.
//   dst = src - value
Calculates the per - element difference between an array and a scalar . dst = src - value