global IPD_PATH; 
RGB = ReadImage(IPD_PATH + 'demos\teaset.png'); 
RGB=RGB(80:180,80:180,: ); 

//Mozliwosc 1 wbudowana 
Image=RGB2Gray(RGB); 

//Mozliwosc 2 funkcja 
[h w d]=size(RGB); 
ImageGray=zeros(h,w); 
//for i = 1:h 
//for j = 1:w 
//ImageGray(i,j)=(uint16(RGB(i,j,1))+uint16(RGB(i,j,2))+uint16(RGB(i,j,3)))/3; 
//end; 
//end 
//ImageGray=uint8(ImageGray); 


//Mozliwosc 3 szarosc 
ImageGray(:,: )=(uint16(RGB(:,:,1))+uint16(RGB(:,:,2))+uint16(RGB(:,:,3)))/3 
ImageGray=uint8(ImageGray); 
ShowColorImage(RGB,'Result'); 
ShowColorImage(ImageGray, 'Obrazek');