how can i obtain only hand after skin detection?

2014 3 20
2 个回答
更新时间：2017 2 13
4 次查看（30 天）

0 个投票

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

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回答（2 个）

Image Analyst
Image Analyst 2014-3-20

0 个投票

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?
YUNUS
YUNUS 2014-3-20

0 个投票

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

5 个评论
显示 3更早的评论 隐藏 3更早的评论

Image Analyst
Image Analyst 2014-3-20
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.
Satya
Satya 2014-8-6
编辑：Satya 2014-8-6
@Image Analyst I think what he meant by saying "only the hand" is when the program runs it detects hand as well as face or other object of color similar to skin.
So the questions is how to isolate hand?
Image Analyst
Image Analyst 2014-8-6
编辑：Image Analyst 2014-8-6
You might be able to do it based on the size. You might need to combine that with temporal tracking with the pretty good assumption that, in a video, the hand will move around a lot more than the face or other skin-colored items in the background do. He didn't provide a photo so that makes answering his question basically a guess.
intissar khalifa
intissar khalifa 2017-2-13
hi mr i need to detect only hand in a video so can you help me and thanks.

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YUNUS
YUNUS
2014-3-20

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Image Analyst
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2017-2-13

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