An image detections system comprising an image detection system configured to detect images. The context modeler includes an initializer for initializing the context modeler by determining and providing initialization probability information to the arithmetic encoder, the initialization probability information to be used by the arithmetic encoder for processing a start symbol of a symbol sequence. 54 micron infrared PL and EL emission from an organic complex. The defining surface include a pair of inner parts that face each other along a direction perpendicular to a light transmission direction.