Split the license plate letters

3 views (last 30 days)
Blazej Staniak
Blazej Staniak on 29 Nov 2021
Commented: yanqi liu on 30 Nov 2021
Hi, I need to split the license plate letters. My program consists in uploading a photo, finding the image of the license plate and cutting out the plate. I just need to split the numbers and letters of this array right now. I don't know exactly how to do this. Does anyone know how it should look like? I will present the effect that I want to achieve in the attachment. The result he wants to achieve is shown on the first appendix
Regards

Answers (1)

yanqi liu
yanqi liu on 29 Nov 2021
yes,sir,may be use
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/807304/obraz_2021-11-20_110914.png');
img2 = imcrop(img, [94 129 1086 217]);
bw = im2bw(img2);
bw = ~bw;
bw = imclearborder(bw);
bw = bwareaopen(bw, round(numel(bw)*0.01));
[L,num] = bwlabel(bw);
stats = regionprops(L);
rects = cat(1, stats.BoundingBox);
rects = sortrows(rects, 1);
ims = [];
figure('Color', [0.8 0.8 0.8]);
for i = 1 : size(rects, 1)
ims{i} = imcrop(img2, round(rects(i,:)));
bwi = ~im2bw(ims{i});
bwi = imresize(bwi, [48 28], 'bilinear');
subplot(1,size(rects, 1),i); imshow(bwi, []);
end
  2 Comments
yanqi liu
yanqi liu on 30 Nov 2021
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/807304/obraz_2021-11-20_110914.png');
img2 = imcrop(img, [94 129 1086 217]);
bw = im2bw(img2);
bw = ~bw;
bw = imclearborder(bw);
im4 = bwareaopen(bw, round(numel(bw)*0.01));
Iprops=regionprops(im4,'BoundingBox','Area', 'Image');
area = Iprops.Area;
count = numel(Iprops);
maxa= area;
boundingBox = Iprops.BoundingBox;
for i=1:count
if maxa<Iprops(i).Area
maxa=Iprops(i).Area;
boundingBox=Iprops(i).BoundingBox;
end
end
im = imresize(im4, 240/size(im4, 1), 'bilinear');
im = imopen(im, strel('rectangle', [4 4]));
%%figure(6), imshowpair(im,im_neg,'montage');
im = imclose(im, strel('rectangle', [2 2]));
labeledImage= bwlabel(im);
% use the follow code
stats = regionprops(labeledImage);
rects = cat(1, stats.BoundingBox);
rects = sortrows(rects, 1);
ims = [];
figure('Color', [0.8 0.8 0.8]);
for i = 1 : size(rects, 1)
imi = imcrop(im, round(rects(i,:)));
imi = imresize(imi, [48 28], 'bilinear');
subplot(1,size(rects, 1),i); imshow(imi, []);
end

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