DIP大作业---图像分割

数字图像处理课程的大作业，要求如下：

图像分割就是把图像分成若干个特定的、具有独特性质的区域并提出感兴趣目标的技术和过程。它是由图像处理到图像分析的关键步骤。现有的图像分割方法主要分以下几类：基于阈值的分割方法、基于区域的分割方法、基于边缘的分割方法以及基于特定理论的分割方法等。图像分割后提取出的目标可以用于图像语义识别，图像搜索等等领域。
要求1：输入一副真彩色RGB图像dog.jpg，完成对小狗的分割，输入结果为只包含小狗区域的二值图（matlab环境下，小狗区域值为1，其他区域值为0）。
要求2：设计一个简单的图形用户界面GUI，显示输入图像和输出图像

<pre name="code" class="plain">function varargout = DIP(varargin)

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

%Last Modified by GUIDE v2.5 07-Jun-2015 01:02:20

%Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @DIP_OpeningFcn, ...
                   'gui_OutputFcn',  @DIP_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 DIP is made visible.
function DIP_OpeningFcn(hObject1, ~, handles1, 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 untitled6 (see VARARGIN)
im=imread('dog.jpg');              %第一张图片的显示
axes(handles1.axes1);
guidata(hObject1, handles1);
hold on;
imshow(im);
handles1.output = hObject1;
% Update handles structure
guidata(hObject1, handles1);

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

% --- Outputs from this function are returned to the command line.
function varargout = DIP_OutputFcn(~, ~, 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(axes2, ~,handles2 )
% 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)
I=imread('dog.jpg');
I1=rgb2hsv(I);                        %转到HSV空间
I2=I1(:,:,2);                         %S分量
BW1=im2bw(I2,0.4);
bw1=BW1(80:650,45:680);               %分割
peng = strel('diamond', 2);
bw11=imdilate(bw1,peng,'same');       %膨胀
bw111=~bw11;                          %取反
saveas(gcf,'dog1','jpg');
axes(handles2.axes2);
guidata(axes2, handles2);
hold on;
imshow(bw111);                        %显示处理完成的图片

处理完成的图像，效果还不错：