Cervical cancer is the fifth most deadly cancer in women, worldwide. Human Papilloma viruses are the main risk factor for cervical cancer. Due to activities of these viruses, the shape and the texture of cytoplasm and nucleus of cells in cervix will change. These Malignant changes can be examined in scenes of Pap smear test under Microscope by pathologists in medical centers. Cervical cancer can be mostly treated if detected in early stages. This procedure takes enormous time and energy from the pathologists, reviewing thousands of cells each day. One of the main steps to help the pathologist is to develop an automatic system which can segment and dir=rtl align=right Key Words Cervical Cancer, Pap Smear Test, Image enhancement, Segmentation, Geometric active contours