As other necessary change there is the removal of image
noise. As already mentioned here, noise is the greatest
enemy of the image, thus removing noise is one of the most
important image adjustments, which is used only for motion
detection. If we should define in my own words the noise,
we would call it, in regards to the treated subject, a defective
pixel, because the output can mean for us not only false
detection, but also increase of the volume of pixels ony a
O. Krejcar • Motion Detection Using a USB Camera – 282 –
black background making up the resulting image, which are
undesirable phenomena for us.