Saturday, June 26, 2010

Mathematics - Basic Background subtraction

| It (x,y) - Bt(x,y) | > T

Basic background subtraction get an image I at time t which is the observed image and subtracts its pixels (x,y) against a background image B at time t. It then compares the absolute value of it against a threshold value which is determined via trial and error.

The basic formula that i used was to subtract the pixels of an image I at time t against an image I at time t+1 and compare it against a threshold.

| It (x,y) - It+1(x,y) | > T

My results can be seen in the following pages:

Result 1

Result 2

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