[求助]想请高手帮我解释一下
			 
			 
			
		
		
		
			
			I=imread('22.bmp');          
[x,y]=size(I);     
BW = bwperim(I);                
 
P1=0;    
P2=0;    
Ny=0;                              
for i=1:x    
    for j=1:y    
        if (BW(i,j)>0)    
            P2=j;    
            if ((P2-P1)==1)        
                Ny=Ny+1;    
            end    
            P1=P2;    
        end    
    end    
end        
    
    
P1=0;    
P2=0;    
Nx=0;                               
for j=1:y    
    for i=1:x    
        if (BW(i,j)>0)    
            P2=i;    
            if ((P2-P1)==1)       
                Nx=Nx+1;    
            end    
            P1-P2;    
        end    
    end    
end     
    
    
SN=sum(sum(BW));                
Nd=SN-Nx-Ny;                    
    
H=max(sum(I));               
W=max(sum(I'));               
L=sqrt(2)*Nd+Nx+Ny;        
    
A=bwarea(I);                    
C=4*pi*A/(L*L);              
R=A/(H*W);                 
E=min(H,W)/max(H,W);            
    
 
Ath1=10000; Ath2=50000;    
Cth=0.5;      Rth=0.5;   Eth=0.8;    
    
    
if ((A>=Ath1)&&(A<Ath2))  
  if ((C>=Cth)&&(R<=Rth)&&(E>Eth))    
        Cancer_Right=1                         
    end        
else if (A>=Ath2)    
        Cancer_Right=2                               
else    
    Cancer_Right=0                              
end    
end    
    
figure(1);    
imshow(I);    
figure(2);    
imshow(BW); 
 
 
这个程序是检测痰里癌细胞用的 想请高手 帮我解释一下 
另外用于识别癌细胞的阈值 
Ath1=10000; Ath2=50000;    
Cth=0.5;      Rth=0.5;   Eth=0.8; 
 
是如何得到的 万分的感谢
		 
		
		
		
		
		
		
		
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