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春衣少年当酒歌，起舞四顾以笑和。这篇文章主要讲述测试文章相关的知识，希望能为你提供帮助。
改进的模板匹配算法
将一次的模板匹配过程更改为两次匹配；
第一次匹配为粗略匹配。取模板的隔行隔列数据，即1/4的模板数据，在被搜索土上进行隔行隔列匹配，即在原图的1/4范围内匹配。由于数据量大幅减少，匹配速度显著提高。同时需要设计一个合理的误差阀值E0：
E0 = e0 * (m + 1) / 2 * (n + 1) / 2
式中：e0为各点平均的最大误差，一般取40~50即可；
m,n为模板的长宽；
第二次匹配是精确匹配。在第一次误差最小点（imin, jmin)的邻域内，即在对角点为（imin -1, jmin -1), (Imin + 1, jmin + 1)的矩形内，进行搜索匹配，得到最后结果。
流程图

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【测试文章】算法实现的关键问题是进行匹配，求最小距离，其解决方法是和训练集的样品逐一进行距离的计算，最后找出最相邻的样品得到类别号。
function varargout = face(varargin)
% FACE MATLAB code for face.fig
%FACE, by itself, creates a new FACE or raises the existing
%singleton*.
%
%H = FACE returns the handle to a new FACE or the handle to
%the existing singleton*.
%
%FACE(\'CALLBACK\',hObject,eventData,handles,...) calls the local
%function named CALLBACK in FACE.M with the given input arguments.
%
%FACE(\'Property\',\'Value\',...) creates a new FACE or raises the
%existing singleton*.Starting from the left, property value pairs are
%applied to the GUI before face_OpeningFcn gets called.An
%unrecognized property name or invalid value makes property application
%stop.All inputs are passed to face_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 face

% Last Modified by GUIDE v2.5 18-Dec-2014 12:02:18

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct(\'gui_Name\',mfilename, ...
\'gui_Singleton\',gui_Singleton, ...
\'gui_OpeningFcn\', @face_OpeningFcn, ...
\'gui_OutputFcn\',@face_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 face is made visible.
function face_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObjecthandle to figure
% eventdatareserved - to be defined in a future version of MATLAB
% handlesstructure with handles and user data (see GUIDATA)
% varargincommand line arguments to face (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = face_OutputFcn(hObject, eventdata, handles)
% varargoutcell array for returning output args (see VARARGOUT);
% hObjecthandle to figure
% eventdatareserved - to be defined in a future version of MATLAB
% handlesstructure 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)
% hObjecthandle to pushbutton1 (see GCBO)
% eventdatareserved - to be defined in a future version of MATLAB
% handlesstructure with handles and user data (see GUIDATA)

% read image to be recognize
global im;
[filename, pathname] = uigetfile({\'*.bmp\'},\'choose photo\');
str = [pathname, filename];
im = imread(str);
axes( handles.axes1);
imshow(im);


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

global im
global reference
global W
global imgmean
global col_of_data
global pathname
global img_path_list

% 预处理新数据
im = double(im(:));
objectone = W\'*(im - imgmean);
distance = 100000000;

% 最小距离法，寻找和待识别图片最为接近的训练图片
for k = 1:col_of_data
temp = norm(objectone - reference(:,k));
if(distance> temp)
aimone = k;
distance = temp;
aimpath = strcat(pathname, \'/\', img_path_list(aimone).name);
axes( handles.axes2 )
imshow(aimpath)
end
end

% 显示测试结果
% aimpath = strcat(pathname, \'/\', img_path_list(aimone).name);
% axes( handles.axes2 )
% imshow(aimpath)






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