BE784751A - DEVICE ALLOWING THE CONTINUOUS FILTERING OF SPACE FREQUENCIES - Google Patents

DEVICE ALLOWING THE CONTINUOUS FILTERING OF SPACE FREQUENCIES

Info

Publication number
BE784751A
BE784751A BE784751A BE784751A BE784751A BE 784751 A BE784751 A BE 784751A BE 784751 A BE784751 A BE 784751A BE 784751 A BE784751 A BE 784751A BE 784751 A BE784751 A BE 784751A
Authority
BE
Belgium
Prior art keywords
device allowing
continuous filtering
space frequencies
frequencies
space
Prior art date
Application number
BE784751A
Other languages
French (fr)
Original Assignee
Philips Nv
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 filed by Philips Nv filed Critical Philips Nv
Publication of BE784751A publication Critical patent/BE784751A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • 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
    • G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
    • G06E3/00—Devices not provided for in group G06E1/00, e.g. for processing analogue or hybrid data
    • G06E3/001—Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Mathematical Physics (AREA)
  • Nonlinear Science (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)
BE784751A 1971-06-12 1972-06-12 DEVICE ALLOWING THE CONTINUOUS FILTERING OF SPACE FREQUENCIES BE784751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7108091A NL7108091A (en) 1971-06-12 1971-06-12

Publications (1)

Publication Number Publication Date
BE784751A true BE784751A (en) 1972-12-12

Family

ID=19813371

Family Applications (1)

Application Number Title Priority Date Filing Date
BE784751A BE784751A (en) 1971-06-12 1972-06-12 DEVICE ALLOWING THE CONTINUOUS FILTERING OF SPACE FREQUENCIES

Country Status (5)

Country Link
BE (1) BE784751A (en)
DE (1) DE2226260A1 (en)
FR (1) FR2141815B3 (en)
GB (1) GB1394744A (en)
NL (1) NL7108091A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2297432A1 (en) * 1975-01-09 1976-08-06 Fleuret Jacques Image processing system for transparencies holography - has laser with level and sweep control also processing laser with opto electric deflector
US4504859A (en) * 1983-01-13 1985-03-12 John K. Grady Multiple X-ray image scanners
IL115166A (en) * 1991-04-30 1997-02-18 Scitex Corp Ltd Apparatus and method for descreening

Also Published As

Publication number Publication date
NL7108091A (en) 1972-12-14
GB1394744A (en) 1975-05-21
FR2141815A1 (en) 1973-01-26
FR2141815B3 (en) 1975-08-08
DE2226260A1 (en) 1972-12-21

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