error found while writing in notepad using OCR

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Pat
Pat 2011-9-20
回答： roja m 2017-11-16
I get an error ehile writing in notepad which is last line in my code,which in have pasted below,my input imge is a score card(AFTER CROPPING FROM A IMAGE)i.e IND 77-4,wen i use OCR to write to note pad,i get output as IND 7ZK,CAN ANYONE TELL WHAT MISTAKE I HAVE MADE
% PRINCIPAL PROGRAM
warning off %#ok<WNOFF>
% Clear all
clc, close all, clear all
% Read image
imagen=imread('samp22.jpg');
% Show image
imshow(imagen);
title('INPUT IMAGE WITH NOISE'
% Convert to gray scale
if size(imagen,3)==3 %RGB image
imagen=rgb2gray(imagen);
end
% Convert to BW
threshold = graythresh(imagen);
imagen =~im2bw(imagen,threshold);
% Remove all object containing fewer than 30 pixels
imagen = bwareaopen(imagen,30);
%Storage matrix word from image
%FIGURE,IM
word=[ ];
re=imagen;
%Opens text.txt as file for write
fid = fopen('text.txt', 'wt');
% Load templates
load templates
global templates
% Compute the number of letters in template file
num_letras=size(templates,2);
while 1
%Fcn 'lines' separate lines in text
[fl re]=lines(re);
imgn=fl;
%Uncomment line below to see lines one by one
figure,imshow(fl);pause(0.5)
%-----------------------------------------------------------------
% Label and count connected components
[L Ne] = bwlabel(imgn);
for n=1:Ne
[r,c] = find(L==n);
% Extract letter
n1=imgn(min(r):max(r),min(c):max(c));
% Resize letter (same size of template)
img_r=imresize(n1,[42 24]);
%imshow(img_r);pause(0.5)
%-------------------------------------------------------------------
% Call fcn to convert image to text
letter=read_letter(img_r,num_letras);
% Letter concatenation
word=[word letter];
end
%fprintf(fid,'%s\n',lower(word));%Write 'word' in text file
(lower)
fprintf(fid,'%s\n',word);%Write 'word' in text file (upper)
% Clear 'word' variable
word=[ ];
if isempty(re) %See variable 're' in Fcn 'lines'
break
end
end
fclose(fid);
%Open 'text.txt' file
winopen('text.txt')

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采纳的回答

Jan
Jan 2011-9-20
WARNING OFF is a bad idea. Usually warnings should be avoided, not ignored.
CLEAR ALL is also a bad idea. It removes all parsed functions from the memory and reading the files again from the disk takes a lot of time. There is not benefit to use this. Nevertheless it appears in many files of beginners, such that I assume it is recommended in a textbook. In spite of this, it is not useful.
If I understand correctly, the problem is found in this line (and all other lines do not concern the problem at all):
letter = read_letter(img_r, num_letras);
This function replies a wrong character - correct? As long as we do not have any information about this function, it is impossible to suggest any improvements.
  1 个评论
Ahmed Mehar
Ahmed Mehar 2015-8-10
Jan Simon here is the function definition of read_letter........ function letter=read_letter(imagn,num_letras) global templates comp=[ ]; for n=1:num_letras sem=corr2(templates{1,n},imagn); comp = [comp sem]; end vd=find(comp==max(comp)); %*-*-*-*-*-*-*-*-*-*-*-*-*- if vd==1 letter='A'; elseif vd==2 letter='a'; elseif vd==3 letter='B'; elseif vd==4 letter='b'; elseif vd==5 letter='C'; elseif vd==6 letter='c'; elseif vd==7 letter='D'; elseif vd==8 letter='d'; elseif vd==9 letter='E'; elseif vd==10 letter='e'; elseif vd==11 letter='F'; elseif vd==12 letter='f'; elseif vd==13 letter='G'; elseif vd==14 letter='g'; elseif vd==15 letter='H'; elseif vd==16 letter='h'; elseif vd==17 letter='I'; elseif vd==18 letter='i'; elseif vd==19 letter='J'; elseif vd==20 letter='j'; elseif vd==21 letter='K'; elseif vd==22 letter='k'; elseif vd==23 letter='L'; elseif vd==24 letter='l'; elseif vd==25 letter='M'; elseif vd==26 letter='m'; elseif vd==27 letter='N'; elseif vd==28 letter='n'; elseif vd==29 letter='O'; elseif vd==30 letter='o'; elseif vd==31 letter='P'; elseif vd==32 letter='p'; elseif vd==33 letter='Q'; elseif vd==34 letter='q'; elseif vd==35 letter='R'; elseif vd==36 letter='r'; elseif vd==37 letter='S'; elseif vd==38 letter='s'; elseif vd==39 letter='T'; elseif vd==40 letter='t'; elseif vd==41 letter='U'; elseif vd==42 letter='u'; elseif vd==43 letter='V'; elseif vd==44 letter='v'; elseif vd==45 letter='W'; elseif vd==46 letter='w'; elseif vd==47 letter='X'; elseif vd==48 letter='x'; elseif vd==49 letter='Y'; elseif vd==50 letter='y'; elseif vd==51 letter='Z'; elseif vd==52 letter='z';
end

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更多回答（1 个）

roja m
roja m 2017-11-16
num_letras=size(templates,2); here why we have to take 2? if u know explaination of each line of program then plz esplain me.

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