opencv/cxcore.go
func XorScalar(src *IplImage, value Scalar, dst *IplImage) {
	XorScalarWithMask(src, value, dst, nil)
}
func XorScalar(src *IplImage, value Scalar, dst *IplImage) {
	XorScalarWithMask(src, value, dst, nil)
}
// Calculates the per-element bit-wise “exclusive or” operation on an array and a scalar.