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how can i obtain only hand after skin detection?

Asked by YUNUS on 20 Mar 2014
Latest activity Edited by YUNUS on 21 Mar 2014

hi; im working on the hand detection, firstly i used skin detection algorithm but i dont know how can i obtain hand after skin detection, here my code;

vid = videoinput('winvideo', 1, 'YUY2_640x480');
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb')
vid.FrameGrabInterval =5;
start(vid)
while(vid.FramesAcquired<=50)
I = getsnapshot(vid);
I=double(I);
%%skin detection
[hue,s,v]=rgb2hsv(I);
cb =  0.148* I(:,:,1) - 0.291* I(:,:,2) + 0.439 * I(:,:,3) + 128;
cr =  0.439 * I(:,:,1) - 0.368 * I(:,:,2) -0.071 * I(:,:,3) + 128;
[w h]=size(I(:,:,1));
for i=1:w
  for j=1:h            
      if  140<=cr(i,j) && cr(i,j)<=165 && 140<=cb(i,j) && cb(i,j)<=195 && 0.01<=hue(i,j) && hue(i,j)<=0.1     
          segment(i,j)=1;            
      else       
          segment(i,j)=0;    
      end    
  end
end
im(:,:,1)=I(:,:,1).*segment;   
im(:,:,2)=I(:,:,2).*segment; 
im(:,:,3)=I(:,:,3).*segment; 
subplot(1,1,1);imshow(uint8(im));title('My Edge Detection')
end
stop(vid);
flushdata(vid);
clear all

0 Comments

YUNUS

2 Answers

Answer by Image Analyst on 20 Mar 2014

segment is your mask. Assuming your algorithm for creating that skin mask is good, then you multiply segment by your original image to blacken outside the mask. So what's the problem? That is "only the hand", I mean other than the black surround. Do you want to crop to the bounding rectangle, or what?

0 Comments

Image Analyst
Answer by YUNUS on 20 Mar 2014

my fundemental problem is to obtain hand, im new at image processing and i dont know how can i obtain hand

2 Comments

Image Analyst on 20 Mar 2014

Can you reply to my questions instead of offering an "Answer" to your original question, which actually wasn't an Answer at all? Did you notice that I had questions about what your intent was? I need to know the answers to those questions so I can understand what "only the hand" means to you, precisely. What you say is vague.

YUNUS

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