In order to enhance target-background contrast in target detection, we use micropolarizer camera providing a division of focal plane to obtain four polarization status images. Based on the polarization status images, the Stokes vectors, degree of linear polarization, angle of polarization and polarization parameter F are calculated. The result shows that, the degree of linear polarization enhances target-background contrast by a large margin, comparing with the origin intensity image, and the polarization parameter enhances the clearness and expands information content of the image, meanwhile keeps the advantage of the degree of linear polarization image.