4963695420219818910720051111549129251604.rar_车牌 定位_车牌定位 matlab

function lpr_loc() % license plate recognition - car plate location based on color model % modified by ZHAO Hui, April 30th,2005 I=imread('Car.jpg'); [y,x,z]=size(I); myI=double(I); %%%%%%%%%%% RGB to HSI %%%%%%%% tic % 测定算法执行的时间，开始计时 %%%%%%%%%%% 统计分析 %%%%%%%%%%%%%%% %%%%%%%% Y 方向 %%%%%%%%%% Blue_y=zeros(y,1); for i=1:y for j=1:x if((myI(i,j,1)<=121)&&myI(i,j,1)>=110&&((myI(i,j,2)<=155)&&(myI(i,j,2)>=141))&&((myI(i,j,3)<=240)&&(myI(i,j,3)>=210))) % 蓝色RGB的灰度范围 Blue_y(i,1)= Blue_y(i,1)+1; % 蓝色象素点统计 end end end [temp MaxY]=max(Blue_y); % Y方向车牌区域确定 PY1=MaxY; while ((Blue_y(PY1,1)>=5)&&(PY1>1)) PY1=PY1-1; end PY2=MaxY; while ((Blue_y(PY2,1)>=5)&&(PY2<y)) PY2=PY2+1; end IY=I(PY1:PY2,:,:); %%%%%%%% X 方向 %%%%%%%%%% Blue_x=zeros(1,x); % 进一步确定X方向的车牌区域 for j=1:x for i=PY1:PY2 if((myI(i,j,1)<=121)&&myI(i,j,1)>=110&&((myI(i,j,2)<=155)&&(myI(i,j,2)>=141))&&((myI(i,j,3)<=240)&&(myI(i,j,3)>=210))) Blue_x(1,j)= Blue_x(1,j)+1; end end end PX1=1; while ((Blue_x(1,PX1)<3)&&(PX1<x)) PX1=PX1+1; end PX2=x; while ((Blue_x(1,PX2)<3)&&(PX2>PX1)) PX2=PX2-1; end PX1=PX1-2; % 对车牌区域的修正 PX2=PX2+2; Plate=I(PY1:PY2,PX1-2:PX2,:); t=toc % 读取计时 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% figure,imshow(I); figure,plot(Blue_y);grid figure,plot(Blue_x);grid figure,imshow(IY); figure,imshow(Plate);