最小外接矩形

最小外接矩形 rectangle('Position',[0.59,0.35,3.75,1.37],'Curvature',[0,0],'LineWidth',2,'LineStyle','--') rectangle('Position',[x×ø?ê,y×ø?ê,?í,?ß],'Curvature',[ÇúÂÊ×ÝÏò,ÇúÂʺáÏò],'LineWidth',Ïß?í,'LineStyle','ÏßÐÎ') ÓÃmatlab?,×îÐ?Íâ?Ó?ØÐÎ Àý×Ó?ºÖ?Òª?Ø×?º?Êýregionprops ====================================== function location=liences_plate_location(image_originate) %Author: Zeng Feng %Date: 11.24.2005 %In: image_originate -- the original image containing the % information about the location of veichile % lience plate %Out: location -- containing the up-left corner location % information and the rectangle width and % height information image_double=double(image_originate); %change the data type to benefit the following procedure image_RGBsum=sum(image_double,3); %compute the sum of R,G,B value with respect to the pixel image_bi=image_double(:,:,3).\image_RGBsum; %compute the ration of sum of (RG to the B component image_bi=uint8(image_bi)*100; %change the data type threshold=graythresh(image_bi); %compute the threshold value for binarilization image_bi_bin=im2bw(image_bi,threshold); image_bi_bin=uint8(image_bi_bin); image_bi_bin=1-image_bi_bin; image_bi_bin=logical(image_bi_bin); se=strel('line', 10, 0); % dilation image_bi_di=imdilate(image_bi_bin,se); ******************************************************* * Çë×?Òâ×ÅÏÂÃæµÄ?úÂë??Óõ?ÁËregionprops ******************************************************* Label=bwlabel(image_bi_di); % connected component labeling area_num=regionprops(Label,'Area'); % following compute binary region properties len_area=length(area_num); max_ind=0; max_num=0; area_bounding=regionprops(Label,'BoundingBox'); t=[]; j=0; for i=1:len_area %compute the ratio of region width to height %search ones witch meet the quality ration=area_bounding(i).BoundingBox(4)/area_bounding(i).BoundingBo x(3); if ration>0.25 && ration<0.75 j=j+1; t(j)=i; end end len_j=length(t); max_ind=t(1); max_num=area_num(t(1)).Area; for i=1:len_j %select the one with the maximum size within the candidate if max_num