ช่วยอธิบายโค้ด matlab ให้หน่อยนะคะ

clc

clear

% pic = imread('car2.jpg');

%

%

% HSV = rgb2hsv(pic);

% H=HSV(:,:,1);

% S=HSV(:,:,2);

% V=HSV(:,:,3);

% imshow(H);

% imshow(S);

% imshow(H);

img_orig=imread('car6.jpg');

   img=img_orig; %copy of original image

   hsv=rgb2hsv(img);

   h=hsv(:,:,1);

   s=hsv(:,:,2);

   

   [r c v]=find(h>0.25 | s<=0.15 | s>0.9); %non skin

   numid=size(r,1);

   

   for i=1:numid

       img(r(i),c(i),:)=0;

   end

   

   figure

   imshow(img);

   

   

   %%

   %ycbcr segmentation

   img_ycbcr=img;  %image from the previous segmentation

   ycbcr=rgb2ycbcr(img_ycbcr);

   cb=ycbcr(:,:,2);

   cr=ycbcr(:,:,3);

   

    

    %Detect Skin

    %[r,c,v] = find(cb>=77 & cb<=127 & cr>=133 & cr<=173);

     [r c v] = find(cb<=77 | cb >=127 | cr<=133 | cr>=173);

    numid = size(r,1);

    

    %Mark Skin Pixels

    for i=1:numid

        img_ycbcr(r(i),c(i),:) = 0;

       % bin(r(i),c(i)) = 1;

    end

    

    figure

    title('ycbcr segmentation');

   imshow(img_ycbcr);

   

   

   

  %%

  %rgb segmentation



img_rgb=img_ycbcr;

r=img_rgb(:,:,1);

g=img_rgb(:,:,2);

b=img_rgb(:,:,3);





[row col v]= find(b>0.79*g-67 & b<0.78*g+42 & b>0.836*g-14 & b<0.836*g+44 ); %non skin pixels

numid=size(row,1);



for i=1:numid

    img_rgb(row(i),col(i),:)=0;

end



figure

imshow(img_ycbcr);

figure

imshow(img_rgb);