We report on some theoretical results of the photon localization parameter in the transparent matrix in which there are constant high refractive index scatterers or anomalous dispersive dielectrics scatterers in the mid-infrared region. Strong photon localization appears when the relative refractive index m is large, and predominant backscattering occurs when m ＞ 3.1. The roles of the matrices on photon localization are found to be very different in two kinds of random media.