An Optimum Number to Determine the Changes of Picture Captured from a Video Camera at A Different Time

Abstract

Even there is no object intruding in a video frame, data captured from a video camera might be changed because of the changes of an intensity from the light source. This means when we detect the changes of data captured from a video, we cannot make a decision that whether the changes caused by the intruding of an object or by the changes of an intensity of the light source. Three experiments were established to find an optimum number to accept that the pixel has been changed only by the effects of the changes of an intensity of the light source. The result of the experiments showed that 5% is an optimum number for an acceptance, which means if the difference of intensity of the pixel is less than 12.8 (in gray scale), we will consider that there is no change for that pixel.