H - Electricity – 04 – N
Patent
H - Electricity
04
N
88/114, 178/3, 8
H04N 5/21 (2006.01) G02B 6/04 (2006.01) G02B 26/10 (2006.01) G02B 27/58 (2006.01) G06E 3/00 (2006.01) G06K 9/74 (2006.01) H04N 5/72 (2006.01)
Patent
CA 1084847
Title: Method and apparatus for linearly filtering two-dimensional signals. Abstract of the Disclosure 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 two- dimensional signal as a function of the time.
269162
Fetherstonhaugh & Co.
N. V. Optische Industrie "de Oude Delft"
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