Improved License Plate Localization

1.) Localization:

clear all;

close all;

clc;

rgb = imread("HPIM0929.JPG");

figure

imshow(rgb)

gray = rgb2gray(rgb);

figure

imshow(gray)

resized = imresize(gray,[480 640]);

figure

imshow(resized)

tophat = imtophat(resized,strel('rectangle',[3 25]));

figure

imshow(tophat)

T = graythresh(tophat);

BW = imbinarize(tophat,T);

figure

imshow(BW)

open = imopen(BW,strel('arbitrary',[1 1 1 1;1 1 1 1]));

figure

imshow(open)

closed = imclose(open,strel('rectangle',[3 11]));

figure

imshow(closed)

2.) Optimal SE(structuring element)

clear all;

close all;

clc;

rgb = imread('4.JPG');

gray = rgb2gray(rgb);

resize = imresize(gray,[240 320]);

[rows, columns] = size(resize);

if rows == 240 && columns == 320

for i = 0:15

tophat = imtophat(gray,strel('rectangle',[3 13]));

binary = imbinarize(tophat);

open = imopen(binary,de2bi(i,4));

closed = imclose(open,strel('rectangle',[3 8]));

figure

imshow(closed)

end

elseif rows == 319 && columns == 425

tophat = imtophat(gray,strel('rectangle',[3 18]));

binary = imbinarize(tophat);

open = imopen(binary,strel('arbitrary',[0 1 0;1 1 1;0 1 0]));

closed = imclose(open,strel('rectangle',[3 9]));

figure

imshow(closed)

elseif rows == 480 && columns == 640

for i = 0:15

for j = 0:15

tophat = imtophat(gray,strel('rectangle',[3 25]));

binary = imbinarize(tophat);

open = imopen(binary,[de2bi(i,4);de2bi(j,4)]);

closed = imclose(open,strel('rectangle',[3 11]));

figure

imshow(closed)

end

end

end