Create RBG slider bars

I am trying to created 4 different slider bars:

1. contrast
2. red
3. blue
4. green

I am getting an error messge that "The class handle has no Constant property or Static method named 'redslider'" and "p variable does not exsist"

Here is my code:

function varargout = final4(varargin)

% FINAL4 MATLAB code for final4.fig

% FINAL4, by itself, creates a new FINAL4 or raises the existing

% singleton*.

%

% H = FINAL4 returns the handle to a new FINAL4 or the handle to

% the existing singleton*.

%

% FINAL4('CALLBACK',hObject,eventData,handles,...) calls the local

% function named CALLBACK in FINAL4.M with the given input arguments.

%

% FINAL4('Property','Value',...) creates a new FINAL4 or raises the

% existing singleton*. Starting from the left, property value pairs are

% applied to the GUI before final4_OpeningFcn gets called. An

% unrecognized property name or invalid value makes property application

% stop. All inputs are passed to final4_OpeningFcn via varargin.

%

% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one

% instance to run (singleton)".

%

% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help final4

% Last Modified by GUIDE v2.5 07-May-2020 10:49:35

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name', mfilename, ...

'gui_Singleton', gui_Singleton, ...

'gui_OpeningFcn', @final4_OpeningFcn, ...

'gui_OutputFcn', @final4_OutputFcn, ...

'gui_LayoutFcn', [] , ...

'gui_Callback', []);

if nargin && ischar(varargin{1})

gui_State.gui_Callback = str2func(varargin{1});

end

if nargout

[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});

else

gui_mainfcn(gui_State, varargin{:});

end

% End initialization code - DO NOT EDIT

% --- Executes just before final4 is made visible.

function final4_OpeningFcn(hObject, eventdata, handles, varargin)

% This function has no output args, see OutputFcn.

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% varargin command line arguments to final4 (see VARARGIN)

% Choose default command line output for final4

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes final4 wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = final4_OutputFcn(hObject, eventdata, handles)

% varargout cell array for returning output args (see VARARGOUT);

% hObject handle to figure

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure

varargout{1} = handles.output;

% --- Executes on slider movement.

function redslider_Callback(hObject, eventdata, handles)

% hObject handle to redslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider

% get(hObject,'Min') and get(hObject,'Max') to determine range of slider

p = handles.p;

p(:,:,1) = get(handle.redslider,'Value')+128 + p(:,:,1) + get(handle.contrast,'Value')+128 + p(:,:,1);

p(:,:,2) = get(handle.greenslider,'Value')+128 + p(:,:,2) + get(handle.contrast,'Value')+128 + p(:,:,2);

p(:,:,3) = get(handle.blueslider,'Value')+128 + p(:,:,3) + get(handle.contrast,'Value')+128 + p(:,:,3);

imshow(p)

% --- Executes during object creation, after setting all properties.

function redslider_CreateFcn(hObject, eventdata, handles)

% hObject handle to redslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on slider movement.

function blueslider_Callback(hObject, eventdata, handles)

% hObject handle to blueslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider

% get(hObject,'Min') and get(hObject,'Max') to determine range of slider

% --- Executes during object creation, after setting all properties.

function blueslider_CreateFcn(hObject, eventdata, handles)

% hObject handle to blueslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on slider movement.

function greenslider_Callback(hObject, eventdata, handles)

% hObject handle to greenslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider

% get(hObject,'Min') and get(hObject,'Max') to determine range of slider

% --- Executes during object creation, after setting all properties.

function greenslider_CreateFcn(hObject, eventdata, handles)

% hObject handle to greenslider (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on slider movement.

function contrast_Callback(hObject, eventdata, handles)

% hObject handle to contrast (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider

% get(hObject,'Min') and get(hObject,'Max') to determine range of slider

%p(:,:,1) = get(handle.redslider,'Value')+128 + p(:,:,1) + get(handle.contrast,'Value')+128 + p(:,:,1);

global im2

val = get(hObject, 'value') + get(handle.redslider,'Value');

c = im2 + val;

imshow(c);

% --- Executes during object creation, after setting all properties.

function contrast_CreateFcn(hObject, eventdata, handles)

% hObject handle to contrast (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))

set(hObject,'BackgroundColor',[.9 .9 .9]);

end

% --- Executes on button press in load.

function load_Callback(hObject, eventdata, handles)

% hObject handle to load (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

global im im2

%import image to matlab

[filename, pathname] = uigetfile({'*.jpg';'*.bmp'},'File Selector');

fullname=[pathname, filename];

im=imread(fullname);

im = im2double(im);

imshow(im);

im2 = im;

%remove axis

axis off;

%auto resize axis to fit image

axis equal;

%im(im,'parent',handles.im);

%handles.p = im; % <--- new line to save the image to the handles object

guidata(hObject, handles); % <--- new line to save the updated handles objet

% --- Executes on button press in exit.

function exit_Callback(hObject, eventdata, handles)

% hObject handle to exit (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

close();

close();