matlab答题卡识别程序

clear all

close all

warning offall

filecounter=input(‘请输入开始的文件序号：’);

students=(‘请输入文件数或学生数：’);

classscore=[];

path='C:\Users\MBENBEN\Desktop\2016年6月月考答题卡检测\195\IMG_20160618_';

filetype=input(‘请输入文件类型：’,’s’);

questiontotal=30;

answer=[2,4,3,2,1,2,2,4,1,3,3,4,3,3,1,4,1,2,3,4,4 ,2,4,1,3,1,4,2,2,2];

while filecounter<=students

score=0;

filename=num2str(filecounter);

file=strcat(path,filename,'.',filetype); answercounter=1;

p=imread(file);

f=rgb2gray(p);

f1=im2bw(f,0.8);

fvertical=~imrotate(f1,-90,'bicubic ');

fvertical=fvertical(:,1:end-25);

[biglong,bigwide]=size(fvertical);

fdownprojection=sum(fvertical); fdownprojectionsmooth=smooth(fdownprojection,30); verticalfz=max(fdownprojectionsmooth)*9/10; fdownprojectionsmooth(fdownprojectionsmooth<=vert icalfz+1)=0;

fdownprojectionsmooth(fdownprojectionsmooth>=vert icalfz-1)=100;plot(fdownprojectionsmooth) verticalruler=[];

verticalrulercounter=1;

while verticalrulercounter

if

fdownprojectionsmooth(verticalrulercounter)~=fdow nprojectionsmooth(verticalrulercounter+1) verticalruler=[verticalrulercounter,verticalruler ];

end

verticalrulercounter=verticalrulercounter +1;

end

verticalrulerarray=fvertical(:,verticalruler(2):v erticalruler(1));

verticalprojection=sum(verticalrulerarray,2); verticalrulerfz=(max(verticalprojection)+min(vert icalprojection))/2;

verticalprojection

(verticalprojection<=verticalrulerfz+1)=0; verticalprojection

(verticalprojection>=verticalrulerfz-1)=100; verticalcounter=1;

verticalruler2=[];

while verticalcounter

if verticalprojection(verticalcounter)~= verticalprojection(verticalcounter+1)

verticalruler2=[verticalruler2,verticalcounter]; end

verticalcounter=verticalcounter+1;

end

rulerarray4=fvertical(verticalruler2(1):verticalr uler2(22),1:verticalruler(2)-40);

rulerarray4level=sum(rulerarray4);

rulerarray4smooth=smooth(rulerarray4level,30);plo t(rulerarray4smooth)

rulerarray4fz=max(rulerarray4smooth)*2/3; rulerarray4smooth(rulerarray4smooth<=rulerarray4f z+1)=0;

rulerarray4smooth(rulerarray4smooth>=rulerarray4f z-1)=100;

ruler4=[];

ruler4counter=1;

[ruler4x,ruler4y]=size(rulerarray4);

while ruler4counter

if

rulerarray4smooth(ruler4counter)~=rulerarray4smoo th(ruler4counter+1)

ruler4=[ruler4,ruler4counter];

else

ruler4=ruler4;

end

ruler4counter=ruler4counter+1;

end

rulerarray4wide=ruler4(end)-ruler4(1);

ruler5=ruler4-rulerarray4wide;

ruler6=[ruler5,ruler4];

verticalruler3= [verticalruler2(29:98)];

ruler3counter=1;

r3=0;

socre=[];

while ruler3counter<70

smalllineoption=fvertical(verticalruler3(ruler3co unter):verticalruler3(ruler3counter+1),:);r3=r3+1 ;

if rem(r3,5)==0

ruler3counter=ruler3counter+4;

ruler3counter=ruler3counter+2;

end

optioncounter6=1;

smalloptionarray=[];

while optioncounter6<5

optionarray=smalllineoption(:,ruler6(optioncounte r6):ruler6(optioncounter6+1));

optionvalue=mean2(optionarray);

smalloptionarray=[smalloptionarray,optionvalue]; optioncounter6=optioncounter6+1;

end

rightoption=max(smalloptionarray);

[optionm,goal,optionl]=find(smalloptionarray==rig htoption);

if goal==answer(answercounter)

score=score+1;

else

score=score;

answercounter= answercounter+1;

end

studentscore=filecounter*100+score;

classscore=[classscore, studentscore];

jdtleft1=ones(50,1000);

jdtleft(:,:,1)=jdtleft1*255;

jdtleft(:,:,2)=jdtleft1*0;

jdtleft(:,:,3)=jdtleft1*0;

jdtright(:,:,1)=jdtleft1*255;

jdtright(:,:,2)=jdtleft1*255;

jdtright(:,:,3)=jdtleft1*255;

jdtred=jdtleft(:,1:1000*filecounter/students,:); jdtwhite=jdtright(:,1000*filecounter/students:100 0,:);

jdt=[jdtred,jdtwhite];imshow(uint8(jdt)) filecounter=filecounter+1;

end

classscore2=classscore';

xlswrite('C:\Users\MBENBEN\Desktop\195.xlsx',clas sscore2,1,'a2');

load gong

sound(y,Fs)