error in vehicle number extraction

Question

SHOBA MOHAN 2018-1-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/377383-error-in-vehicle-number-extraction

I wish to extract the number and sign (person with disability) from vehicle number plate. I created the template for the same. I am able to extract the number plate but failed in extracting the characters from the image got the error "index exceeds matrix dimension".

%Templates Creation
desiredsize = [42 24];
files = {'1', '2', '3', '4', '5', '0', 'sign'};
NewTemplates1 = cell(size(files));
for fileidx = 1:numel(files)
   img = imread([files{fileidx}, '.png']);
   img= rgb2gray(img);
   img = imresize(img, desiredsize);
   NewTemplates1{fileidx} = img;
end
%number plate extraction code
img=imread('2222.jpg');
figure,imshow(img);
load NewTemplates1;
% load('imgfildata.mat');
[~,cc]=size(img);
picture=imresize(img,[300 500]);
if size(picture,3)==3
  picture=rgb2gray(picture);  %grey values are btwn 0 to 1 or 0 to 255
end
threshold = graythresh(picture);  %greythresh gives the threshold value of greyscale image
picture =~im2bw(picture,threshold);   %black nd white values are 0 or 1 and values greater thn threshold=1,rest=0 and invert white and black ie 1 to 0 and 0 to 1
picture = bwareaopen(picture,30);  % those things that have less than 30 pixels are removed
if cc>2000
    picture1=bwareaopen(picture,3500);  %those things that have less than 3500 pixels are removed ie excluding nmbr plate
else
picture1=bwareaopen(picture,3000);  %those things that have less than 3000 pixels are removed ie excluding nmbr plate
end
picture2=picture-picture1;  %only number plate is left
picture2=bwareaopen(picture2,50);   %only text is there in the nmbr plate
figure,imshow(picture2);
title('plate extracted');
[L,Ne]=bwlabel(picture2);  %l gives matrix which has info of nmbr plate and Ne gives number of digits or characters
final_output=[];
t=[];
for n=1:Ne
  [r,c] = find(L==n);   
  n1=picture(min(r):max(r),min(c):max(c));   %picture command crops nth object from L
  n1=imresize(n1,[42,24]);     %in database size is 42,24 so it is resized so that we can match it with the database
 figure,imshow(n1);
    x=[ ];
  for k=1:length(NewTemplates1) 
  %      totalLetters
      y=corr2(NewTemplates1{1,k},n1);
      x=[x y];
   end
  %  t=[t max(x)];
   if max(x)>0.35
     z=find(x==max(x));
     out=cell2mat(NewTemplates1(2,z));
     final_output=[final_output out];
   end
end
np=final_output;
disp(np);

I am attaching the input and templates files for your kind reference. Can anyone help me on this issue and suggest me how to extract the no.s and sign successively.