充水用于车牌识别 [英] Flood filling for number plate recognition

问题描述

我有一个二进制图像的牌照。

I have a number plate which is a binary image.

我对图像进行了扩张，使边缘变粗，然后填充，最后是细化的侵蚀：

I performed dilation to the image to thicken the edges then "flood filling", lastly erosion for thinning:

但我希望我的输出是这样的：

But i want my output to be like this:

有人可以帮帮我吗？并告诉我如何获得所需的输出。

Can anyone help me, please? And show me how to get the desired output.

ab=imread('test1.png');

level=graythresh(ab);
ab=im2bw(ab,level);

se=strel('disk',1);
ab=imdilate(ab,se); 


ab=imfill(ab,'holes');
ab=bwmorph(ab,'thin',1);
ab=imerode(ab,strel('line',3,90));

figure();imshow(ab,[]); title('floodFilling');

推荐答案

您可以通过其他一些巧妙的调用来执行此操作 imfill 。这是一种方法，假设你的二进制图像在数组中 BW ：

You can do this with a few other clever calls to imfill. Here is a way, assuming your binary image is in the array BW:

Tmp = imfill(BW, 'holes');
Tmp2 = imfill(Tmp-BW, 'holes');
Res = Tmp - imfill(BW & Tmp2, 'holes');

和 Res 是包含的二进制图像所需的输出：

and Res is a binary image that contains the desired output:

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