帮我写一个代码，用matlab编写gui进行数字图像处理

好的，这是一个简单的MATLAB GUI代码，用于进行数字图像处理。这个代码包含了一个滑块和一个按钮，用于控制图像的亮度和对比度。您可以在这个代码的基础上，添加更多的功能和控件。

function varargout = image_processing_gui(varargin)
% IMAGE_PROCESSING_GUI MATLAB code for image_processing_gui.fig
%      IMAGE_PROCESSING_GUI, by itself, creates a new IMAGE_PROCESSING_GUI or raises the existing
%      singleton*.
%
%      H = IMAGE_PROCESSING_GUI returns the handle to a new IMAGE_PROCESSING_GUI or the handle to
%      the existing singleton*.
%
%      IMAGE_PROCESSING_GUI('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in IMAGE_PROCESSING_GUI.M with the given input arguments.
%
%      IMAGE_PROCESSING_GUI('Property','Value',...) creates a new IMAGE_PROCESSING_GUI or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before image_processing_gui_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to image_processing_gui_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 image_processing_gui

% Last Modified by GUIDE v2.5 30-Mar-2021 10:32:50

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @image_processing_gui_OpeningFcn, ...
                   'gui_OutputFcn',  @image_processing_gui_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 image_processing_gui is made visible.
function image_processing_gui_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 image_processing_gui (see VARARGIN)

% Choose default command line output for image_processing_gui
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes image_processing_gui wait for user response (see UIRESUME)
% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.
function varargout = image_processing_gui_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 brightness_slider_Callback(hObject, eventdata, handles)
% hObject    handle to brightness_slider (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get the current slider value
brightness_value = get(hObject, 'Value');

% Load the image
img = imread('test_image.jpg');

% Adjust the brightness
new_img = brightness_value * img;

% Display the new image
axes(handles.image_axes);
imshow(new_img);

% --- Executes during object creation, after setting all properties.
function brightness_slider_CreateFcn(hObject, eventdata, handles)
% hObject    handle to brightness_slider (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 contrast_button.
function contrast_button_Callback(hObject, eventdata, handles)
% hObject    handle to contrast_button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Load the image
img = imread('test_image.jpg');

% Adjust the contrast
new_img = imadjust(img, [], [], 2);

% Display the new image
axes(handles.image_axes);
imshow(new_img);

这个代码包括了一个带有坐标轴的GUI窗口，一个滑块和一个按钮。滑块用于控制图像的亮度，按钮用于控制图像的对比度。当您移动滑块时，图像的亮度将发生变化。当您点击按钮时，图像的对比度将增加。