This paper addresses the problem of image change
detection (ICD) based on Markov random field (MRF) models.
MRF has long been recognized as an accurate model to describe
a variety of image characteristics. Here, we use the MRF to
model both noiseless images obtained from the actual scene and
change images (CIs), the sites of which indicate changes between
a pair of observed images. The optimum ICD algorithm under
the maximum a posteriori (MAP) criterion is developed under this
model. Examples are presented for illustration and performance
evaluation.