frame subtraction using adaptive thresholding

code:

clear;close all;
im1=imread('stab1.jpg');
im2=imread('stab2.jpg');
bwim1=adaptivethreshold(im1,15,0.08,0);
bwim2=adaptivethreshold(im2,15,0.03,0);
subplot(3,2,1);
imshow(im1);title('First Frame');
subplot(3,2,2);
imshow(bwim1);title('Adaptive Threshold First Frame');
subplot(3,2,3);
imshow(im2);title('Second Frame');
subplot(3,2,4);
imshow(bwim2);title('Adaptive threshold second Frame');

subt = imabsdiff(im1,im2);
subplot(3,2,5);
imshow(subt);title('subtracted bg');

subO = imabsdiff(bwim1,bwim2);
subplot(3,2,6);
imshow(subO);title('subtracted bg Threshold');