how bounding box detect letter in binary image

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Samreen kayani 2019-1-9

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438907-how-bounding-box-detect-letter-in-binary-image

评论： Samreen kayani 2019-1-9

clc
clear all 
close all%% Read Image
Inputimage=imread('manhoos.jpg');
%Inputimage=imread('DMM3.png');
%% Show image
Inputimage=imcrop(Inputimage)
figure(1)
imshow(Inputimage);
title('INPUT IMAGE WITH NOISE')
x=[];
%% Convert to gray scale
if size(Inputimage,3)==3 % RGB image
 Inputimage=rgb2gray(Inputimage);
end
%% Convert to binary image
threshold = graythresh(Inputimage);
Inputimage =~im2bw(Inputimage,threshold);
word=[ ];
%% Remove all object containing fewer than 30 pixels
Inputimage=im2bw(Inputimage)
Inputimage1 = bwareaopen(Inputimage,10);
 
% Inputimage2 = bwmorph(Inputimage1,'remove');
% Inputimage = bwmorph(Inputimage2,'skel',Inf);
re=Inputimage1;
while (1)
    %Fcn 'lines' separate lines in text
    [fl re]=lines(re);
    imgn=fl
   
    %Uncomment line below to see lines one by one
    %imshow(fl);pause(0.5)    
    %-----------------------------------------------------------------     
    % Label and count connected components
    [L Ne] = bwlabel(Inputimage);    
    for n=1:Ne
        [r,c] = find(L==n);
   
        n1=imgn(min(r):max(r),min(c):max(c));  
        % Resize letter (same size of template)
        figure
         imshow(n1);pause(0.5)
%         img_r=imresize(n1,[42 24]);
        % % Sort boxes by image height
%  s = regionprops(n1,'BoundingBox');e
% bboxes = vertcat(s(:).BoundingBox);
% [~,ord] = sort(bboxes(:,2));
% bboxes = bboxes(ord,:);
% % Pre-process image to make letters thicker
% BW = imdilate(n1,strel('disk',1));
% % Call OCR and pass in location of words. Also, set TextLayout to 'word'
% ocrResults = ocr(n1,bboxes,'CharacterSet','-.0123456789','TextLayout','word');
% words = {ocrResults(:).Text}';
% words = deblank(words)
        %Uncomment line below to see letters one by one
%         figure
%          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
end 