A method and apparatus for image processing to detect changes in a scene
includes compressing by computing a wavelet transform of an image
corresponding to the scene, thresholding coefficients associated with the
transform, and comparing a subset of coefficients with values to detect
and indicate a change in the image. Values such as averages and a
standard deviation therefrom can be generated during training by
processing N training images. Determining whether a change has occurred
includes determining the value of image sets, standard deviation and
training sets, and comparing these, based on the type of change to be
ascertained, to statistical information.