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: icatb_image_viewer.m
    path of file: ./repos/gift/GroupICAT/icatb/icatb_display_functions
    
    the code of the file until where you have to start completion: function dispParameters = icatb_image_viewer(file_names, varargin)
%% Image viewer
%
% Inputs:
% 1. file_names - Character array of file names
% Arguments passed in p
    
function  getDispDefaults
%% Get display defaults
%

icatb_defaults;
global UI_FS;
global UI_FONTNAME;
global CONVERT_Z;
global IMAGE_VALUES;
global THRESHOLD_VALUE;
global ANATOMICAL_PLANE;
global DATA_VIS_THRESHOLD;

%% Draw graphics
figureTag = 'setup_image_viewer_gui';
figHandle = findobj('tag', figureTag);
if (~isempty(figHandle))
    delete(figHandle);
end