You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: OrthoSlicer3d.m
    path of file: ./repos/matImage/matImage/imStacks
    
    the code of the file until where you have to start completion: classdef OrthoSlicer3d < handle
%ORTHOSLICER3D Display 3D interactive orthoslicer
%
%   OrthoSlicer3d(IMG)
%   Displays an interactive 3D orthoslicer of a 3D image. 
%
%   OrthoSlicer3d(..., NAME, VALUE)
%   Specifies one 
    
function obj = OrthoSlicer3d(img, varargin)
        
        % call parent constructor
        obj = obj@handle();
        
        obj.Handles = struct();

        % Setup image data and type
        obj.ImageData = img;
        obj.ImageType = 'grayscale';
        
        % compute size, and detect RGB
        dim = size(img);
        nd = length(dim);
        
        % check image type
        if nd > 3
            % Image is 3D color or vector
            
            % extreme values
            valMin = min(img(:));
            valMax = max(img(:));
            
            % determines image nature
            if dim(3) ~= 3 || valMin < 0 || (isfloat(img) && valMax > 1)
                obj.ImageType = 'vector';
            else
                obj.ImageType = 'color';
            end