我想对车牌中的字符进行分割，并通过模板匹配进行识别。
但是在我在图像处理中做了一些基本步骤之后，输出图像有一个边框，所以这个边框被检测为另一个字符。
怎么解决？？
这是我的代码：
% Resizing the image keeping aspect ratio same.
citra=imresize(citra,[400 NaN]);
% Converting the RGB (color) image to gray (intensity).
citra_bw=rgb2gray(citra);
citra_bw= imclearborder(citra_bw);
imshow(citra_bw);
% Median filtering to remove noise.
citra_filt=medfilt2(citra_bw,[5 5]);
se=strel('disk',3);
% Dilating the gray image with the structural element.
citra_dilasi=imdilate(citra_filt,se);
% Eroding the gray image with structural element.
citra_eroding=imerode(citra_filt,se);
% Morphological Gradient for edges enhancement.
citra_edge_enhacement=imsubtract(citra_dilasi,citra_eroding);
imshow(citra_edge_enhacement);
% Converting the class to double.
citra_edge_enhacement_double=mat2gray(double(citra_edge_enhacement));
% Convolution of the double image f
citra_double_konv=conv2(citra_edge_enhacement_double,[1 1;1 1]);
% Intensity scaling between the range 0 to 1.
citra_intens=imadjust(citra_double_konv,[0.5 0.7],[0 1],0.1);
% 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_logic=logical(citra_intens);
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);
imshow(citra_final);
这是原始图像：
（来源：plateshack.com）
这是处理后的图像，字符中有边框
