1 简介
由于红外成像仪器本身存在缺陷和环境的影响，造成图像成像效果不是很理想，噪声大，视觉效果不好，这些都会影响融合的效果。所以在图像融合之前先进行图像的去噪、增强等处理，改善红外图像的视觉效果。采用分段函数对红外图像进行增强，提高图像的动态范围，增加图像的对比度，使图像更加清晰明显，以便于进行最后的融合。在图像融合的过程中融合规则往往比较重要，基于像素的融合方法不能反映一定区域内像素之间的关系，而人眼对像素的感知也是区域性的，基于像素的方法往往具有片面性。通过改进的小波算法把红外图像和可见光图像进行分解，分别得到图像的低频系数部分和高频系数部分，低频部分采用梯度求和加权的融合规则，高频部分采用区域相关性方差的融合规则，最后再对低频部分和高频部分进行小波重构得到最后的融合图像。改进的算法融合流程如图 1 所示。经过小波的 4 层分解得到分层图，图 2a 为可见光图像小波分解图示，图 2b 为红外图像小波分解图示，经过逐层分解，得到原图像的不同频段。
2 部分代码
function varargout = main(varargin)
% MAIN MATLAB code for main.fig
% MAIN, by itself, creates a new MAIN or raises the existing
% singleton*.
%
% H = MAIN returns the handle to a new MAIN or the handle to
% the existing singleton*.
%
% MAIN('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in MAIN.M with the given input arguments.
%
% MAIN('Property','Value',...) creates a new MAIN or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before main_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to main_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 main
% Last Modified by GUIDE v2.5 14-Dec-2017 19:28:26
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @main_OpeningFcn, ...
'gui_OutputFcn', @main_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 main is made visible.
function main_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 main (see VARARGIN)
2(i,j,k)) > abs(VcV2(i,j,k))
cV20(i,j,k) = RcV2(i,j,k);
else
cV20(i,j,k) = VcV2(i,j,k);
end
if abs(RcD2(i,j,k)) > abs(VcD2(i,j,k))
cD20(i,j,k) = RcD2(i,j,k);
else
cD20(i,j,k) = VcD2(i,j,k);
end
end
end
end
%%%%%%反变换
img_fuse2 = idwt2(cA20,cH20,cV20,cD20,'sym4');%LL1,HL1,LH1,HH1
img_fuse2 = img_fuse2(1:M1,1:N1,1:3);
img_fuse0 = idwt2(img_fuse2,cH10,cV10,cD10,'sym4');
for k=1:3
% a=max(max(img_fuse0(:,:,k)));
% b=min(min(img_fuse0(:,:,k)));
% img_fuse0(:,:,k)=1/(b-a)*img_fuse0(:,:,k)-(1/(b-a)*a);
a=max(max(img_fuse0(:,:,k)));
img_fuse0(:,:,k)= img_fuse0(:,:,k)./a;
end
axes(handles.axes3);
imshow(img_fuse0);
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)
[FileName, FilePath]=uigetfile('*.tif;*.jpg;*.png;*.img;*.gif;*.bmp;','请选择图像数据');
str=[FilePath FileName];
image_1=imread(str);
handles.imfusion1=image_1;
axes(handles.axes1);
imshow(image_1);
[FileName, FilePath]=uigetfile('*.tif;*.jpg;*.png;*.img;*.gif;*.bmp;','请选择图像数据');
str=[FilePath FileName];
image_1=imread(str);
handles.imfusion2=image_1;
axes(handles.axes2);
imshow(image_1);
guidata(hObject, handles);
% --- Executes when uipanel1 is resized.
function uipanel1_ResizeFcn(hObject, eventdata, handles)
% hObject handle to uipanel1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
3 仿真结果
4 参考文献
[1]许凡. 红外与可见光图像融合技术的研究[D]. 中国科学院研究生院(西安光学精密机械研究所).
部分理论引用网络文献，若有侵权联系博主删除。
5 MATLAB代码与数据下载地址
见博客主页
