MATLAB GUI编程显示载入.JPG图片
MATLAB GUI软件界面显示载入的.JPG图片分两种情况，一种是希望点击按钮后显示载入的图片、另一种情况是希望软件界面一开始就载入默认位置的图片。 启动MATLAB 2018b后，在命令行光标后输入： guide 并回车，选择并打开名为 untitled8.fig 的文件。我从互联网上下载了NVIDIA和AMD两个游戏显卡公司的图片作为素材，分别用好压看图2345调整完像素大小并保存为NVIDIA.jpg和AMD.jpg
一、启动时默认载入NVIDIA.jpg并显示在GUI轴 axes3
找到对象“axes3”,查看回调 CreatFcn 因为有代码语句：
% Hint: place code in OpeningFcn to populate axes3
所以了解到，需要把载入和显示图片的代码插入到这个GUI图像的 OpeningFcn函数下面位置。
% --- Executes just before untitled8 is made visible.
function untitled8_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 untitled8 (see VARARGIN)
% Choose default command line output for untitled8
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes untitled8 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
im = imread('NVIDIA.jpg');
axes(handles.axes3) %在坐标轴3下画图
imshow(im)
二、点击按钮后再显示载入的图片
找到按钮对象，查看回调Callback
% --- 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)
warning off %取消警告
im = imread('AMD.jpg');%读图
axes(handles.axes2) %在坐标轴2下画图
imshow(im) %显示图像
