如何使用matlab在图片上嵌入logo？

简单说下思路：matlab读入的图片是矩阵形式的，灰度图就是二维矩阵，彩色图就是三维的，嵌入logo就是把logo图片的像素值放到读入的图片里。

简单的源码（好久没写matlab代码了，也没测试，要改应该也很容易）：

img

=

imread('img.jpg')

//假设图片是二维的灰度图片

logo

=

imread('logo.jpg')

//假设也是二维的

new_img

=

img

new_img[1:size(logo,1),

1:size(logo,2)]

=

a

*

img[1:size(logo,1),

1:size(logo,2)]

+

b

*

logo

a和b可以自己设置，只要a+b=1就行了。如果要logo明显，就把b设的大些。

具体实现方法，其实十分简单，只需要一个函数chgicon.m

该函数用红色文字表示：

function chgicon(h,filename)

%CHGICON changes the figure icon.

%

CHGICON(H,FILENAME) changes the icon of a figure to an image specified by

%

the string FILENAME, where H is a handle to the figure. If the file is not

%

in the current directory or in a directory in the MATLAB path,specify the

%

full pathname of the location on your system. If FILENAME is not a valid

%

image file name, the function just removes the previous icon of the figure.

%

%

Example:

%

h = figure

%

chgicon(h,'newIcon.png')% replace 'newIcon.png' with your image

%

% IMPORTANT NOTES:

%

REPLACING THE MATLAB GUI ICON VIOLATES THE LICENSE AGREEMENT

% OF MATLAB. DO NOT USE THIS FUNCTION COMMERCIALLY.

%

%

Han Qun, Sept. 2005

%

Copyright 2005-2006 Han Qun

%

College of Precision Instrument and Opto-Electronics Engineering,

%

Tianjin University, 300072, P.R.China.

%

Email: junziyang@126.com

%

$Revision: 1.0 $

$Date: 2005/12/2 $

if nargin<2

error('MATLAB:chgicon','%s','Too few input arguments!')

end

if nargin >2

error('MATLAB:chgicon','%s','Too many input arguments!')

end

newIcon = javax.swing.ImageIcon(filename)

javaFrame = get(h,'JavaFrame')

javaFrame.setFigureIcon(newIcon)将上面的函数保存在自己要使用的路径下，再调用即可。

调用语句：

h = figure

chgicon(h,'12.jpg')

就可以了。

再推广到GUI上也是一样的，只要在Create Fcn中调用这个函数就可以了：

function figure1_CreateFcn(hObject, eventdata, handles)

% hObjecthandle to figure1 (see GCBO)

% eventdatareserved - to be defined in a future version of MATLAB

% handlesempty - handles not created until after all CreateFcns called

chgicon(hObject,'12.jpg')

---