parking with licence plate recognition,,HELP

Question

abdiaziz abdullahi 2017-11-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/366451-parking-with-licence-plate-recognition-help

回答： Image Analyst 2017-11-15

hello everyone,,i have been working on a project(automatic parking using number plate recognition algorithm,,license plate recognition algorithm based on Templates matching. The algorithm takes an input image of the number plate and after filtering the image, it performs region based operations. Then it tries to capture the characters regions in a processed binary image and with the aid of template matching outputs the string of number plate characters in text format,,,am currently done with the recognition and output part,,,am having some problems with the creation and connection of the database to the NPR code so as to compare the text output of the first part of the code and see whether the detected plate number is a registered customer or not..i will appreciate any help.THANK YOU

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abdiaziz abdullahi 2017-11-11

编辑：Walter Roberson 2017-11-11

在 MATLAB Online 中打开

clc
close all;
clear;
load imgfildata;
[file,path]=uigetfile({'*.jpg;*.bmp;*.png;*.tif'},'Choose an image');
s=[path,file];
picture=imread(s);
[~,cc]=size(picture);
picture=imresize(picture,[300 500]);
if size(picture,3)==3
  picture=rgb2gray(picture);
end
% se=strel('rectangle',[5,5]);
% a=imerode(picture,se);
% figure,imshow(a);
% b=imdilate(a,se);
threshold = graythresh(picture);
picture =~im2bw(picture,threshold);
picture = bwareaopen(picture,30);
imshow(picture)
if cc>2000
    picture1=bwareaopen(picture,3500);
else
picture1=bwareaopen(picture,3000);
end
figure,imshow(picture1)
picture2=picture-picture1;
figure,imshow(picture2)
picture2=bwareaopen(picture2,200);
figure,imshow(picture2)
[L,Ne]=bwlabel(picture2);
propied=regionprops(L,'BoundingBox');
hold on
pause(1)
for n=1:size(propied,1)
  rectangle('Position',propied(n).BoundingBox,'EdgeColor','g','LineWidth',2)
end
hold off
figure
final_output=[];
t=[];
for n=1:Ne
  [r,c] = find(L==n);
  n1=picture(min(r):max(r),min(c):max(c));
  n1=imresize(n1,[42,24]);
  imshow(n1)
  pause(0.2)
  x=[ ];
totalLetters=size(imgfile,2);
   for k=1:totalLetters
      y=corr2(imgfile{1,k},n1);
      x=[x y];
   end
   t=[t max(x)];
   if max(x)>.45
   z=find(x==max(x));
   out=cell2mat(imgfile(2,z));
final_output=[final_output out];
end
end
file = fopen('number_Plate.txt', 'wt');
    fprintf(file,'%s\n',final_output);
    fclose(file);                     
    winopen('number_Plate.txt')

abdiaziz abdullahi 2017-11-12

在 MATLAB Online 中打开

    clc
    close all;
    clear;
    load imgfildata;
    [file,path]=uigetfile({'*.jpg;*.bmp;*.png;*.tif'},'Choose an image');
    s=[path,file];
    img=imread(s);
    np=number_plate(img);
    disp(np);
NEXT PART STARTS HERE
clc
close all;
clear;
load imgfildata;
[file,path]=uigetfile({'*.jpg;*.bmp;*.png;*.tif'},'Choose an image');
s=[path,file];
picture=imread(s);
[~,cc]=size(picture);
picture=imresize(picture,[300 500]);
if size(picture,3)==3
  picture=rgb2gray(picture);
end
% se=strel('rectangle',[5,5]);
% a=imerode(picture,se);
% figure,imshow(a);
% b=imdilate(a,se);
threshold = graythresh(picture);
picture =~im2bw(picture,threshold);
picture = bwareaopen(picture,30);
imshow(picture)
if cc>2000
    picture1=bwareaopen(picture,3500);
else
picture1=bwareaopen(picture,3000);
end
figure,imshow(picture1)
picture2=picture-picture1;
figure,imshow(picture2)
picture2=bwareaopen(picture2,200);
figure,imshow(picture2)
[L,Ne]=bwlabel(picture2);
propied=regionprops(L,'BoundingBox');
hold on
pause(1)
for n=1:size(propied,1)
  rectangle('Position',propied(n).BoundingBox,'EdgeColor','g','LineWidth',2)
end
hold off
figure
final_output=[];
t=[];
for n=1:Ne
  [r,c] = find(L==n);
  n1=picture(min(r):max(r),min(c):max(c));
  n1=imresize(n1,[42,24]);
  imshow(n1)
  pause(0.2)
  x=[ ];
totalLetters=size(imgfile,2);
   for k=1:totalLetters
      y=corr2(imgfile{1,k},n1);
      x=[x y];
   end
   t=[t max(x)];
   if max(x)>.45
   z=find(x==max(x));
   out=cell2mat(imgfile(2,z));
final_output=[final_output out];
end
end
file = fopen('number_Plate.txt', 'wt');
    fprintf(file,'%s\n',final_output);
    fclose(file);                     
    winopen('number_Plate.txt')

Image Analyst 2017-11-12

Wow - there's no way we could have know how to help just from your original message. No way I would have guessed at this chunk of code. Anyway, did you try the Computer Vision System Toolbox? It can do OCR and find text in natural scenes. If not, why not? It would be hard for you to put in all the time and effort that they already have. Since they've done it, why not just buy it?

abdiaziz abdullahi 2017-11-12

在 MATLAB Online 中打开

i cant buy it,,because this is the specific project that i want to do,,unless they are exactly the same,,,i saw this code for comparison from a another similar code...was thinking if i could do the same and how...

function G = comparison(ans)
Data = ['XJZ 7743';'OKW 4532';'JFZ 4056';'LLZ 2268';'JGF 3678';'DHQ 5491'];
A = char(ans);
B = cellstr(Data);
D = cellstr(A);
F = strcmp(D,B);
G =  F(1)|F(2)|F(3)|F(4)|F(5)|F(6);
end

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Answer 1

Walter ANPR 2017-11-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/366451-parking-with-licence-plate-recognition-help#answer_291262

If I would have the same challenge, I would interface with an Industry Grade LPR / ANPR system which already deals with many countries' license plate formats and format / syntax changes with which you should cope with as well, instead of reinventing that wheel. Then you can concentrate on the parking management software, where just interfacing with a professional, open LPR / ANPR system would just ask for a small part of your development efforts.

Regards, Walter.

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Answer 2

Image Analyst 2017-11-15

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/366451-parking-with-licence-plate-recognition-help#answer_291276

"i cant buy it,,because this is the specific project that i want to do"

So if you're not allowed to buy or otherwise use other people's software because you're supposed to do it yourself, then all I can suggest is http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

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