How to i segment human body

I need to segment human body. I can segment light-colored and shadowless pictures. But if image has dark color and shadow it's not working

          I=rgb2gray(I);
          I=adapthisteq(I);
          BW = im2bw(I,0.4);
          yourbwimage = logical(1 - BW);
          BW2 = bwareaopen(yourbwimage, 500);
          se = strel('disk',3);
          foreground1 = imclose(BW2,se);

How can i segment dark colored-shadow frame.

[Image Analyst]

What kind of control do you have over your image capture conditions? Can you have a light background and have your subject wear dark clothing? Can you use a better cyc?

Can you take a shot of just the background with no person in it first so you can determine the difference between your subject image and the background image?

What are those 3 rectangular green zones? What do they represent?

[umut]

the images used are taken from the kth data set so i can not do these. those boxes are for bounding the human body. But it is not working because segmentation is not correct

[KALYAN ACHARJYA]

Share the original input image

[umut]