Device for correcting the dynamic output range of a graphic processor for studying luminance contrast

摘要

the device for correcting the output of a dynamic graphics processor (2).includes an adapter (14) receiving an input signal of the luminance of the graphics processor (2), an attenuator (15) is connected to the adjustable attenuation coefficient for exit entry adapter (14), a generator (19) of adjustable reference voltage level.a summation circuit (20) receiving the output signal of the attenuator (15) and the generator (19) of the reference voltage and the decoding logic circuit (17) connected to a computer (1) associated with the graphics processor (2) through an input interface (16).and, on the other hand, the attenuator (15) and the generator (19) for controlling the adjustment of the values of the coefficient of attenuation of the attenuator (15) and the level of the reference voltage of the generator (19).;the generator is used in a correction device for the study of luminance contrast with a cathode ray tube (4) for the display of various spatial and temporal frequency stimulation.