A digital signal representation of an image is normalized by applying a normalization parameter to all pixels of the digital signal representation of the image or to the pixels of a multi-scale representation of the image. Signals from a first local oscillator are fed through a power splitter to first and second mixers. A master network intelligence database is established that uses a plurality of network information agents for gathering information about networks and providing the information to the master network intelligence database. The thermal image was acquired by a thermal imaging system. The converter element has a first surface facing away from the radiation coupling out area. The driving method includes applying a voltage on the data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect, and applying different asymmetric waveforms to different data lines for trapping impurities crossing the data lines and lowering the degree of the image sticking effect.