Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to DD188659ApriorityCriticalpatent/DD122146A1/xx
Publication of DD122146A1publicationCriticalpatent/DD122146A1/xx
Priority to DE19762643334prioritypatent/DE2643334A1/de
G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
G02B27/46—Systems using spatial filters
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
G06V10/00—Arrangements for image or video recognition or understanding
G06V10/88—Image or video recognition using optical means, e.g. reference filters, holographic masks, frequency domain filters or spatial domain filters
