Hand segmentation from an RGB and depth image obtained from kinect device

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Hi all. I am trying to use the dataset from this paper and segment hand from the image. I attach a sample RGB and depth image. I have written this code.
close all;
threshold=min_v+100;%threshold - varying this is not helping much but ofcourse will deteriorate
figure; imshow(BW);%shown in result3.jpg file.
The result is shown in the result3,jpg file which is attached. As you can see even elbow comes. How do I segment just the hand? I am relatively new to RGB and depth images and kinect. Any help is greatly appreciated.
Shyam verma
Shyam verma on 9 Jun 2021
Hey! can you give the dataset as the link that you mentioned above for dataset is not working/showing error.
with regards

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Answers (1)

Image Analyst
Image Analyst on 19 Aug 2017
If the person always has a black wrist band, then you should have 2 blobs, not 1, and then you can use bwareafilt() to extract the largest one, which will be the forearm, and then subtract that from the original mask to get only the hand.
forearmMask = bwareafilt(binaryImage, 1);
handMask = binaryImage & ~forearmMask;
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kowshik Thopalli
kowshik Thopalli on 19 Aug 2017
Two issues. One I am not getting two blobs by using the code that I am doing. And it is very heuristic to select the threshold. Here in this example I have 100. But I have 1000 images and this number keeps varying.how to over come these? I have a feeling that what I am doing is not correct. Can you please show me the right path.

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