GB1394744A - Filtering spatial frequencies - Google Patents
Filtering spatial frequenciesInfo
- Publication number
- GB1394744A GB1394744A GB2707672A GB2707672A GB1394744A GB 1394744 A GB1394744 A GB 1394744A GB 2707672 A GB2707672 A GB 2707672A GB 2707672 A GB2707672 A GB 2707672A GB 1394744 A GB1394744 A GB 1394744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filtered
- filter
- transform
- give
- plane
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7108091A NL7108091A (de) | 1971-06-12 | 1971-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1394744A true GB1394744A (en) | 1975-05-21 |
Family
ID=19813371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2707672A Expired GB1394744A (en) | 1971-06-12 | 1972-06-09 | Filtering spatial frequencies |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE784751A (de) |
DE (1) | DE2226260A1 (de) |
FR (1) | FR2141815B3 (de) |
GB (1) | GB1394744A (de) |
NL (1) | NL7108091A (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2133656A (en) * | 1983-01-13 | 1984-07-25 | John K Grady | Multiple x-ray image scanners |
US5333064A (en) * | 1991-04-30 | 1994-07-26 | Scitex Corporation, Ltd. | Apparatus & method for descreening |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2297432A1 (fr) * | 1975-01-09 | 1976-08-06 | Fleuret Jacques | Perfectionnements aux dispositifs de traitement d'images optiques |
-
1971
- 1971-06-12 NL NL7108091A patent/NL7108091A/xx unknown
-
1972
- 1972-05-30 DE DE19722226260 patent/DE2226260A1/de active Pending
- 1972-06-09 GB GB2707672A patent/GB1394744A/en not_active Expired
- 1972-06-09 FR FR7220895A patent/FR2141815B3/fr not_active Expired
- 1972-06-12 BE BE784751A patent/BE784751A/xx unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2133656A (en) * | 1983-01-13 | 1984-07-25 | John K Grady | Multiple x-ray image scanners |
US5333064A (en) * | 1991-04-30 | 1994-07-26 | Scitex Corporation, Ltd. | Apparatus & method for descreening |
US5384648A (en) * | 1991-04-30 | 1995-01-24 | Scitex Corporation Ltd. | Apparatus and method for descreening |
Also Published As
Publication number | Publication date |
---|---|
NL7108091A (de) | 1972-12-14 |
BE784751A (fr) | 1972-12-12 |
FR2141815A1 (de) | 1973-01-26 |
FR2141815B3 (de) | 1975-08-08 |
DE2226260A1 (de) | 1972-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |