opencv/cxcore.go
func AddScalar(src *IplImage, value Scalar, dst *IplImage) {
	AddScalarWithMask(src, value, dst, nil)
}
func AddScalar(src *IplImage, value Scalar, dst *IplImage) {
	AddScalarWithMask(src, value, dst, nil)
}
// Calculates the per-element sum of an array and a scalar.
//   dst = src + value