An image processing apparatus reads an original by R, G and B sensors and a monochromatic sensor, and includes Log conversion means for subjecting signals produced by the reading to Log conversion. Pressure and displacement sensors normally provided with a positioner are used to detect operating parameters of the control loop. The DRM processor exchanges messages with the terminal for interoperably managing the digital rights. The timing and position information is used to estimate imaging information about the object, including position, size, shape and motion information. According to the invention, the semiconductor detector furthermore includes a gap in the guard ring and also a controllable gate which is arranged over the gap in the guard ring and makes the gap in the guard ring permeable or impermeable to the signal charge carriers to be removed, depending on an electrical actuation of the gate. At least two of the decode gates share a transistor.