removal of background of cropped image

iam new to matlab.iam doing project of detecting abnormal activities for elderly people.now i need to remove the back ground .pls help to me sir

Answer 1

[Purushottama Rao]

http://in.mathworks.com/matlabcentral/answers/155976-how-to-remove-background-from-an-image

this gives a good starting point..

[Jlavanya 815]

my cropped images are like this

[Jlavanya 815]

my cropped images are like this ,how can i remove background with only persons.please help to me sir.

Answer 2

[Deepak Gala]

This might link might help! https://blogs.mathworks.com/loren/2015/06/24/how-do-you-modify-the-background-of-an-image/?s_tid=answers_rc2-1_p4_MLT