DE3910675A1 - Method for differential exposure measurement in aerial surveying cameras - Google Patents
Method for differential exposure measurement in aerial surveying camerasInfo
- Publication number
- DE3910675A1 DE3910675A1 DE19893910675 DE3910675A DE3910675A1 DE 3910675 A1 DE3910675 A1 DE 3910675A1 DE 19893910675 DE19893910675 DE 19893910675 DE 3910675 A DE3910675 A DE 3910675A DE 3910675 A1 DE3910675 A1 DE 3910675A1
- Authority
- DE
- Germany
- Prior art keywords
- sensor
- exposure measurement
- changing
- altering
- differential exposure
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 6
- 238000005259 measurement Methods 0.000 title claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/22—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with temperature or height, e.g. in aircraft
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/02—Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Exposure Control For Cameras (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Die Erfindung findet bei der Luftbildaufnahme durch photo grammetrische Aufnahmesysteme Anwendung.The invention takes place in aerial photography by photo grammatical recording systems application.
Es ist bereits bekannt (Aufnahmesystem "LMK", VEB Carl Zeiss JENA), die Objekthelligkeit mittels eines im Objektiv stützen untergebrachten schmalwinkligen Sensors zu messen. Unter Verwendung der gemessenen minimalen Geländehelligkei ten erfolgt die Bestimmung der Belichtungsparameter, die von Hand oder automatisch auf Verschluß und Blende über tragen werden, so der im Gegensatz zur integralen Belich tungsmessung, die Unterbelichtung der Schattenpartien des Geländes verhindert wird.It is already known (recording system "LMK", VEB Carl Zeiss JENA), the object brightness by means of an in the lens support housed narrow angle sensor to measure. Using the measured minimum terrain brightness The exposure parameters are determined by hand or automatically on shutter and aperture in contrast to the integral Belich measurement, the underexposure of the shadow areas of the Terrain is prevented.
Weiterhin wird unter Verwendung der gemessenen minimalen und maximalen Geländehelligkeiten der Geländekontrast be stimmt und in Abhängigkeit vom gewünschten Dichteumfang des Negativs eine Gradationsempfehlung ermittelt und ange zeigt.Furthermore, using the measured minimum and maximum terrain brightness of the terrain contrast be correct and depending on the desired density range of the negative a gradation recommendation determined and attached shows.
Aufgrund der Konstanz des Bildwinkels des Sensorsystems hängt die erfaßte Geländefläche vom Abbildungsmaßstab und damit von der Flughöhe ab. Mit steigender Flughöhe ergibt sich ein zunehmender Integrationseffekt über die im Emp fängerfleck stochastisch verteilten Geländehelligkeiten. Due to the constant image angle of the sensor system the area covered depends on the image scale and thus from the altitude. With increasing flight altitude results an increasing integration effect over the in the Emp catch spot stochastically distributed terrain brightness.
Daraus resultiert eine anwachsende Verfälschung der er mittelten Belichtungsparameter und Gradationsempfehlungen.This results in an increasing falsification of the averaged exposure parameters and gradation recommendations.
Ziel der Erfindung ist es, auch aus großen Flughöhen die dunklen Objektflächen optimal abzubilden und Informations verluste in diesen Abbildungen zu vermeiden.The aim of the invention is to also from high altitudes optimally map dark object areas and information avoid losses in these illustrations.
Die Erfindung geht von der Aufgebe aus, eine korrekte An zeige des Objektkontrastes unter Vermeidung von Verfäl schungen bei dunklen Objektflächen zu realisieren. Die Auf gabe wird mit einem Verfahren zur differentiellen Belich tungsmessung in Luftbildkammern, wobei über einen Sensor die Objekthelligkeit gemessen wird, erfindungsgemäß da durch gelöst, daß die vom Sensor erfaßte Objektfläche im wesentlichen konstant gehalten wird. Erfindungsgemäße Ausführungsformen bestehen darin, daß die Objektfläche durch Veränderung der Sensorfläche konstant gehalten wird, bzw. daß die Objektfläche durch Veränderung einer dem Sensor vorgeordneten Blende konstant gehalten wird, oder daß die Objektfläche durch Veränderung der Brennweite eines dem Sensor vorgeordneten Objektivs konstant gehalten wird.The invention is based on the task of correct show the object contrast while avoiding falsification realizations with dark object surfaces. The on is given using a differential exposure method tion measurement in aerial chambers, using a sensor the object brightness is measured, according to the invention solved by that the object area detected by the sensor in is kept essentially constant. According to the invention Embodiments are that the object area is kept constant by changing the sensor area, or that the object surface by changing one of the Sensor upstream aperture is kept constant, or that the object area by changing the focal length of a lens upstream of the sensor kept constant becomes.
Durch die Erfindung wird die Bildqualität verbessert, was einen unmittelbaren Einfluß auf die Ökonomie nachfolgender Arbeitsschritte (photogrammetrische und interpretatorische Auswertung) hat. Die automatische Berücksichtigung der Flughöhe entlastet außerdem den Operateur von subjektiven Entscheidungen hinsichtlich bewußter Korrekturen der ange zeigten bzw. eingebrachten Belichtungsparameter.The image quality is improved by the invention, what a direct impact on the economy subsequent Work steps (photogrammetric and interpretative Evaluation). The automatic consideration of the Flight altitude also relieves the surgeon of subjective Decisions regarding conscious corrections to the showed or introduced exposure parameters.
Die Erfindung wird nachstehend anhand der schematischen Zeichnung näher erläutert. The invention is described below with reference to the schematic Drawing explained in more detail.
In einem nicht dargestellten Objektivgehäuse ist eine Belichtungsmeßeinrichtung, bestehend aus Sensor 1, Blende 2 und Objektiv 3, deren optische Achse parallel zu der des Hauptobjektivs der Kamera verläuft, angeordnet.An exposure measuring device, consisting of sensor 1 , aperture 2 and objective 3 , whose optical axis runs parallel to that of the main objective of the camera, is arranged in an objective housing (not shown).
Die ermittelte Flughöhe hg wird einem Steuerrechner 6, der Bestandteil des Aufnahmesystems ist, zugeführt. Dieser ermittelt aus der Flughöhe die notwendige Brennweite des Objektivs 3. Zur Einstellung der ermittelten Brennweite (Leitung a) werden wahlweise aus Linsen 4 und Grau filter 5 bestehende optische Baugruppen eingeschwenkt. Die abgebildete Objektfläche bleibt damit immer innerhalb bestimmter vorgewählter Grenzen.The determined flight altitude hg is fed to a control computer 6 , which is part of the recording system. This determines the necessary focal length of the objective 3 from the flight altitude. To set the determined focal length (line a ), optical lenses consisting of lenses 4 and gray filters 5 are pivoted in. The object area shown always remains within certain pre-selected limits.
Dieser Effekt kann auch durch Veränderung der Blende 2 (Leitung b) bzw. durch Veränderung der aktiven Sensor fläche i, beispielsweise durch wahlweises Ab- oder Zu schalten von Teilen der Empfängerfläche (über Leitung c) erfolgen.This effect can also be achieved by changing the diaphragm 2 (line b ) or by changing the active sensor surface i , for example by optionally switching parts of the receiver surface on or off (via line c ).
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD31552888A DD272127A1 (en) | 1988-05-09 | 1988-05-09 | METHOD FOR DIFFERENTIAL EXPOSURE MEASUREMENT IN AIR PICTURE CHAMBERS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3910675A1 true DE3910675A1 (en) | 1989-11-23 |
| DE3910675C2 DE3910675C2 (en) | 1998-09-17 |
Family
ID=5599057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19893910675 Expired - Lifetime DE3910675C2 (en) | 1988-05-09 | 1989-04-03 | Differential exposure metering method in aerial imaging chambers |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH677969A5 (en) |
| DD (1) | DD272127A1 (en) |
| DE (1) | DE3910675C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870422A1 (en) * | 2004-05-13 | 2005-11-18 | Airbus France Sas | Image acquisition device e.g. digital camera, for aircraft, has mask masking part of camera field covered by sensor and including opacification zone that is placed on transparent plate, where mask is disposed directly with respect to sensor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3200233A1 (en) * | 1981-04-02 | 1982-10-21 | Jenoptik Jena Gmbh, Ddr 6900 Jena | "METHOD FOR DETERMINING OPTIMUM FILM DEVELOPMENT PARAMETERS IN AERIAL VIEW" |
| DE3324985A1 (en) * | 1982-08-16 | 1984-02-16 | Veb Pentacon Dresden Kamera- Und Kinowerke, Ddr 8021 Dresden | Photoelectric measuring device for cameras |
| JPS601602A (en) * | 1983-06-20 | 1985-01-07 | Pioneer Electronic Corp | Bookshelf type record player |
| DE3506492A1 (en) * | 1985-02-23 | 1986-08-28 | Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar | METHOD AND DEVICE FOR ENTERING, VISIBILITY AND / OR REGISTERING A VARIABLE MEASURING SPOT IN A RADIATION OF A CAMERA FOR OPTICAL DEVICES |
| US4626686A (en) * | 1984-04-09 | 1986-12-02 | Exergen Corporation | Variable field of view heat scanner |
| EP0078278B1 (en) * | 1981-05-11 | 1987-02-04 | Wild Heerbrugg Ag. | Device for adjusting the exposure of an aerial photograph camera |
-
1988
- 1988-05-09 DD DD31552888A patent/DD272127A1/en not_active IP Right Cessation
-
1989
- 1989-04-03 DE DE19893910675 patent/DE3910675C2/en not_active Expired - Lifetime
- 1989-05-08 CH CH172389A patent/CH677969A5/de not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3200233A1 (en) * | 1981-04-02 | 1982-10-21 | Jenoptik Jena Gmbh, Ddr 6900 Jena | "METHOD FOR DETERMINING OPTIMUM FILM DEVELOPMENT PARAMETERS IN AERIAL VIEW" |
| EP0078278B1 (en) * | 1981-05-11 | 1987-02-04 | Wild Heerbrugg Ag. | Device for adjusting the exposure of an aerial photograph camera |
| DE3324985A1 (en) * | 1982-08-16 | 1984-02-16 | Veb Pentacon Dresden Kamera- Und Kinowerke, Ddr 8021 Dresden | Photoelectric measuring device for cameras |
| JPS601602A (en) * | 1983-06-20 | 1985-01-07 | Pioneer Electronic Corp | Bookshelf type record player |
| US4626686A (en) * | 1984-04-09 | 1986-12-02 | Exergen Corporation | Variable field of view heat scanner |
| DE3506492A1 (en) * | 1985-02-23 | 1986-08-28 | Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar | METHOD AND DEVICE FOR ENTERING, VISIBILITY AND / OR REGISTERING A VARIABLE MEASURING SPOT IN A RADIATION OF A CAMERA FOR OPTICAL DEVICES |
Non-Patent Citations (1)
| Title |
|---|
| VEB Carl Zeiss JENA-DDR:"LMK",Produktbeschreibung * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2870422A1 (en) * | 2004-05-13 | 2005-11-18 | Airbus France Sas | Image acquisition device e.g. digital camera, for aircraft, has mask masking part of camera field covered by sensor and including opacification zone that is placed on transparent plate, where mask is disposed directly with respect to sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CH677969A5 (en) | 1991-07-15 |
| DD272127A1 (en) | 1989-09-27 |
| DE3910675C2 (en) | 1998-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OR8 | Request for search as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8105 | Search report available | ||
| 8127 | New person/name/address of the applicant |
Owner name: CARL ZEISS JENA GMBH, O-6900 JENA, DE |
|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8327 | Change in the person/name/address of the patent owner |
Owner name: Z/I IMAGING GMBH, 73431 AALEN, DE |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: INTERGRAPH (DEUTSCHLAND) GMBH, 85737 ISMANING, DE |
|
| 8327 | Change in the person/name/address of the patent owner |
Owner name: Z/I IMAGING LTD., SHANNON, COUNTY CLARE, IE |
|
| 8328 | Change in the person/name/address of the agent |
Representative=s name: LORENZ UND KOLLEGEN, 89522 HEIDENHEIM |