數(shù)字圖像處理課程設(shè)計報告

1、 數(shù)字圖像處理課程設(shè)計報告 數(shù)字圖像處理課程設(shè)計報告姓 名：宋東洋、祁飛、馮登科 學(xué) 號： 20137750342、20137750336、20137750309 班 級： 軟件開發(fā) .NET 3班 設(shè)計題目： 手寫體數(shù)字識別 教 師： 龐海波老師 提交日期： 2015年12月25日 一、設(shè)計內(nèi)容：主題：手寫體數(shù)字識別詳細(xì)說明：讀入手寫體數(shù)字圖片，選擇要識別的數(shù)字然后通過尋找數(shù)字邊界將圖像裁剪的邊緣，然后生成裁剪后圖像的二進(jìn)制圖像，并將其轉(zhuǎn)換成57的圖像，然后進(jìn)行特征提取，運(yùn)行Simulink模型識別數(shù)字。二、現(xiàn)實(shí)意義：手寫體數(shù)字的識別有著非常廣泛的應(yīng)用(如:郵政編碼、統(tǒng)計報表、財務(wù)報表、銀行

2、票據(jù)等等)。三、涉及知識內(nèi)容：1、邊界查找2、二值化3、Simulink模型四、實(shí)例分析及截圖效果：（1） 代碼顯示：1、程序中定義圖像變量說明 （1）S-原圖變量;（2）img_crop-選擇的圖象;（3）imgGray-灰度圖像變量（4）BW-二值化圖像；（5）charvec-5*7圖像變量；2、實(shí)現(xiàn)代碼：Index.mfunction varargout = charGUI(varargin)% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct(gui_Name, mfilename,

3、. gui_Singleton, gui_Singleton, . gui_OpeningFcn, charGUI_OpeningFcn, . gui_OutputFcn, charGUI_OutputFcn, . gui_LayoutFcn, , . gui_Callback, );if nargin & ischar(varargin1) gui_State.gui_Callback = str2func(varargin1);endif nargout varargout1:nargout = gui_mainfcn(gui_State, varargin:);else gui_main

4、fcn(gui_State, varargin:);end% End initialization code - DO NOT EDIT% - Executes just before charGUI is made visible.function charGUI_OpeningFcn(hObject, eventdata, handles, varargin)load data;assignin(base,net,net);handles.output = hObject;guidata(hObject, handles);% - Outputs from this function ar

5、e returned to the command line.function varargout = charGUI_OutputFcn(hObject, eventdata, handles) varargout1 = handles.output;% - Executes on button press in pbLoad.function pbLoad_Callback(hObject, eventdata, handles)filename, pathname = uigetfile(*.bmp;*.jpg;*.gif;*.*, Pick an Image File);S = imr

6、ead(pathname,filename);axes(handles.axes1);imshow(S);handles.S = S;guidata(hObject, handles);% - Executes on button press in pbSelect.function pbSelect_Callback(hObject, eventdata, handles)S = handles.S;axes(handles.axes1);img_crop = imcrop(S);axes(handles.axes2);imshow(img_crop);handles.img_crop =

7、img_crop;guidata(hObject, handles);% - Executes on button press in pbPreprocess.function pbPreprocess_Callback(hObject, eventdata, handles)img_crop = handles.img_crop;imgGray = rgb2gray(img_crop);bw = im2bw(img_crop,graythresh(imgGray);axes(handles.axes3);imshow(bw);bw2 = edu_imgcrop(bw);axes(handle

8、s.axes4);imshow(bw2);handles.bw2 = bw2;guidata(hObject, handles);% - Executes on button press in pbExtract.function pbExtract_Callback(hObject, eventdata, handles)bw2 = handles.bw2;charvec = edu_imgresize(bw2);axes(handles.axes5);plotchar(charvec);handles.charvec = charvec;guidata(hObject, handles);

9、% - Executes on button press in pbRecognize.function pbRecognize_Callback(hObject, eventdata, handles)charvec = handles.charvec;selected_net = get(handles.editNN,string);selected_net = evalin(base,selected_net);result = sim(selected_net,charvec);val, num = max(result);set(handles.editResult, string,

10、mod(num,10);% - Executes on button press in pbNN.function pbNN_Callback(hObject, eventdata, handles)function editNN_Callback(hObject, eventdata, handles)% - Executes during object creation, after setting all properties.function editNN_CreateFcn(hObject, eventdata, handles)if ispc & isequal(get(hObje

11、ct,BackgroundColor), get(0,defaultUicontrolBackgroundColor) set(hObject,BackgroundColor,white);endfunction editResult_Callback(hObject, eventdata, handles)% - Executes during object creation, after setting all properties.function editResult_CreateFcn(hObject, eventdata, handles)if ispc & isequal(get

12、(hObject,BackgroundColor), get(0,defaultUicontrolBackgroundColor) set(hObject,BackgroundColor,white);endedu_imgcrop.mfunction bw2 = edu_imgcrop(bw)% 求圖像的邊界y2temp x2temp = size(bw);x1=1;y1=1;x2=x2temp;y2=y2temp;% 尋找左側(cè)空白空間cntB=1;while (sum(bw(:,cntB)=y2temp) x1=x1+1; cntB=cntB+1;end% 尋找右側(cè)空白空間cntB=1;wh

13、ile (sum(bw(cntB,:)=x2temp) y1=y1+1; cntB=cntB+1;end% 尋找上邊空白空間cntB=x2temp;while (sum(bw(:,cntB)=y2temp) x2=x2-1; cntB=cntB-1;end% 尋找下邊空白空間cntB=y2temp;while (sum(bw(cntB,:)=x2temp) y2=y2-1; cntB=cntB-1;end% 將圖像裁剪到邊緣bw2=imcrop(bw,x1,y1,(x2-x1),(y2-y1);edu_imgresize.mfunction lett = edu_imgresize(bw2)%

14、 此功能將采取裁剪的二進(jìn)制圖像，并將其改為57% 單個向量中的特征表示。bw_7050=imresize(bw2,70,50);for cnt=1:7 for cnt2=1:5 Atemp=sum(bw_7050(cnt*10-9:cnt*10),(cnt2*10-9:cnt2*10); lett(cnt-1)*5+cnt2)=sum(Atemp); endendlett=(100-lett)/100);lett=lett;3、運(yùn)行效果截圖：第一步：讀取原圖,并顯示第二步：選擇圖像并顯示第三步：預(yù)處理（二值化、查找邊界、裁剪圖片）第四步： 特征提取第五步：顯示數(shù)字（運(yùn)行Simulink模型）四、算法分析（1）Simulink模型sim函數(shù)用來運(yùn)行Simulink模型。需要注意的是，用戶無法控制其仿真過程（例如暫停、繼續(xù)），一旦運(yùn)行就會直到達(dá)到結(jié)束條件為止這一點(diǎn)和通過模型窗口界面運(yùn)行仿真不同。五、心得體會通過這次的課程設(shè)計，我對Matlab有了一定的了解