直方图均衡化matlab gui代码

以下是一个简单的 MATLAB GUI 代码示例，用于对图像进行直方图均衡化：

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

% Last Modified by GUIDE v2.5 30-Apr-2021 10:28:09

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

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = histogram_equalization_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 button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Load an image from file
[filename, pathname] = uigetfile({'*.bmp;*.jpg;*.png;*.gif','All Image Files';...
          '*.*','All Files' },'Select an image file');

if filename ~= 0
    handles.I = imread(fullfile(pathname, filename));
    axes(handles.axes1);
    imshow(handles.I);
    set(handles.pushbutton2,'Enable','on');
end

guidata(hObject, handles);


% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Convert image to grayscale
I = rgb2gray(handles.I);

% Perform histogram equalization
J = histeq(I);

% Display results
axes(handles.axes2);
imshow(J);

guidata(hObject, handles);

此代码使用了 MATLAB GUI，其中包含两个按钮和两个图像框。

第一个按钮（`pushbutton1`）用于加载图像文件，第二个按钮（`pushbutton2`）用于执行直方图均衡化并显示结果。

在 `pushbutton2` 回调函数中，首先将 RGB 图像转换为灰度图像，然后使用 `histeq` 函数执行直方图均衡化，并将结果显示在第二个图像框中。