METHOD AND APPARATUS FOR LINEARLY FILTERING TWO- DIMENSIONAL SIGNALS

摘要

Title: Method and apparatus for linearly filtering two-dimensional signals. A method of linearly filtering spatially two-dimensional signals. The signal to be filtered is applied to an electronic imaging system. For providing a scanning movement, the signal is deflected in the electronic imaging system and swept over at least one mask in which a desired corrective filter function is established in the form of a specific transmission characteristic, The light passed by the mask is detected by means of at least one photodetector placed behind the mask. The output signal of the photodetector is a representation of the filtered twodimensional signal as a function of the time.