Polynomial fitting

Thu, 01 Nov 2012 18:16:33 -0700

hello,
i have a problem with this code ,I'am looking for the équation of the polynomial that fits the curve on this image
I tried the fitting by figure window-tools-basic fiting but I didn't have any convincing result
could you please help me

clear;
clc;
I=imread('C:\Documents and Settings\Administrateur\Bureau\TT.bmp');

I=I(:,:,1)>160;
imshow(I)
I=bwmorph(~I,'thin','inf');
imshow(~I)
I = imresize(I, [199 199]);
imtool(I);

[N,N]=size(I); 
        iptsetpref('ImshowAxesVisible','on') 
        figure; imshow(I,[],'Xdata',[0:N-1],'Ydata',[0:N-1],'InitialMagnification','fit')
        xlabel('x')
        ylabel('y')
        title('initial image');
        colormap(gray), colorbar;
        x=zeros(1,199*199);
        inc=1;
        y=x;
 figure;         
    for l=1:199       
   
        for c=1:199           
    
            if (I(l,c)==1)        
                x(1,inc)=l;
                y(1,inc)= c;         
                inc=inc+1;      
            
            end
        end
    end
imtool(x);
imtool(y);
hold on     
plot(x,y,'.');

the image is attached there

Attachment: TT.bmp (7654 bytes | downloaded 20 times)

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Polynomial fitting