public static GrayS16 invert(GrayS16 input, int max , GrayS16 output) {
		output = InputSanityCheck.checkDeclare(input, output);

		ImplGrayImageOps.invert(input,max,output);

		return output;
	}
public static GrayS16 invert ( GrayS16 input , int max , GrayS16 output ) { output = InputSanityCheck . checkDeclare ( input , output ) ; ImplGrayImageOps . invert ( input , max , output ) ; return output ; }
<p>
Inverts the image's intensity:<br>
O<sub>x,y</sub> = max - I<sub>x,y</sub><br>
</p>

@param input  Input image. Not modified.
@param output If not null, the output image.  If null a new image is declared and returned.  Modified.
@return Output image.