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POHow to extract and recognize the vehicle plate number with matlab?
 

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  1. POHow to extract and recognize the vehicle plate number with matlab?
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    <p>I want to develop a matlab program that can extract and recognize the plate number of vehicle with template matching method. Here is my code:</p> <pre><code>function letters = PengenalanPlatMobil(citra) %load NewTemplates %global NewTemplates citra=imresize(citra,[400 NaN]); % Resizing the image keeping aspect ratio same. citra_bw=rgb2gray(citra); % Converting the RGB (color) image to gray (intensity). citra_filt=medfilt2(citra_bw,[3 3]); % Median filtering to remove noise. se=strel('disk',1); citra_dilasi=imdilate(citra_filt,se); % Dilating the gray image with the structural element. citra_eroding=imerode(citra_filt,se); % Eroding the gray image with structural element. citra_edge_enhacement=imsubtract(citra_dilasi,citra_eroding); % Morphological Gradient for edges enhancement. imshow(citra_edge_enhacement); citra_edge_enhacement_double=mat2gray(double(citra_edge_enhacement)); % Converting the class to double. citra_double_konv=conv2(citra_edge_enhacement_double,[1 1;1 1]); % Convolution of the double image f citra_intens=imadjust(citra_double_konv,[0.5 0.7],[0 1],0.1); % Intensity scaling between the range 0 to 1. citra_logic=logical(citra_intens); % Conversion of the class from double to binary. % Eliminating the possible horizontal lines from the output image of regiongrow % that could be edges of license plate. citra_line_delete=imsubtract(citra_logic, (imerode(citra_logic,strel('line',50,0)))); % Filling all the regions of the image. citra_fill=imfill(citra_line_delete,'holes'); % Thinning the image to ensure character isolation. citra_thinning_eroding=imerode((bwmorph(citra_fill,'thin',1)),(strel('line',3,90))); %Selecting all the regions that are of pixel area more than 100. citra_final=bwareaopen(citra_thinning_eroding,125); [labelled jml] = bwlabel(citra_final); % Uncomment to make compitable with the previous versions of MATLAB® % Two properties 'BoundingBox' and binary 'Image' corresponding to these % Bounding boxes are acquired. Iprops=regionprops(labelled,'BoundingBox','Image'); %%% OCR STEP [letter{1:jml}]=deal([]); [gambar{1:jml}]=deal([]); for ii=1:jml gambar= Iprops(ii).Image; letter{ii}=readLetter(gambar); % imshow(gambar); % end end </code></pre> <p>but the number recognized is always wrong and too much is detected or sometimes too little. How to fix it?</p> <p>Here is the <a href="http://i1360.photobucket.com/albums/r649/farhat1s/DSC_0512_zpsa99acbea.jpg" rel="nofollow">images</a> and <a href="http://i1360.photobucket.com/albums/r649/farhat1s/1_zpsaa2585c2.jpg" rel="nofollow">this one</a> </p>
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    1. COThis is a repeat of http://stackoverflow.com/questions/17926768/how-to-perform-automatic-number-plate-extraction-from-an-image/17935167#17935167, although you made the changes suggested in my answer to your previous post. My suggestion would be to isolate the license plate first from the rest of the image and then apply your code.
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    2. CO@Try Hard : i have made the isolated plate and do that same code, but the segmentation result is wrong..How to fix it..Any suggestion
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      1. POHow to extract and recognize the vehicle plate number with matlab?
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    3. COIn what sense is it wrong? It performs very well for me!
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