CA1155696A - Orthophoto-mapping apparatus - Google Patents
Orthophoto-mapping apparatusInfo
- Publication number
- CA1155696A CA1155696A CA000380136A CA380136A CA1155696A CA 1155696 A CA1155696 A CA 1155696A CA 000380136 A CA000380136 A CA 000380136A CA 380136 A CA380136 A CA 380136A CA 1155696 A CA1155696 A CA 1155696A
- Authority
- CA
- Canada
- Prior art keywords
- optical
- orthophoto
- projection
- character
- image
- 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
- 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
- G01C11/04—Interpretation of pictures
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Preparing Plates And Mask In Photomechanical Process (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
The invention contemplates effective printing of alphanumerical characters and symbols (for instance control points, sheet corners, terrain coordinates, place and field names, or the like), using optical projection of the characters or symbols onto the film which also receives the orthographic reconstruction of a scanned axial photograph.
Specifically, a master stencil of characters and symbols is arranged in the ray path of the optical system used for the orthoprojection, and the stencil is sequentially displaced and exposed while the orthophoto is still in the mapping apparatus. The selection of stencil position is effected under computer control, such that after keyboard input of the desired character, the picture-supporting carriage with the stencil mounted thereon travels from one to its next position, with the projection system effectively shut off. The size and orientation of character exposure can be preselected by element displacement within the orthoprojection system, which contains, inter alia, a zoom system and an image-rotating prism.
The invention contemplates effective printing of alphanumerical characters and symbols (for instance control points, sheet corners, terrain coordinates, place and field names, or the like), using optical projection of the characters or symbols onto the film which also receives the orthographic reconstruction of a scanned axial photograph.
Specifically, a master stencil of characters and symbols is arranged in the ray path of the optical system used for the orthoprojection, and the stencil is sequentially displaced and exposed while the orthophoto is still in the mapping apparatus. The selection of stencil position is effected under computer control, such that after keyboard input of the desired character, the picture-supporting carriage with the stencil mounted thereon travels from one to its next position, with the projection system effectively shut off. The size and orientation of character exposure can be preselected by element displacement within the orthoprojection system, which contains, inter alia, a zoom system and an image-rotating prism.
Description
115~696 The invention relates to an orthophoto mapping device which is commonly referred to as an orthoprojector and is used to produce parallel-perspective orthophotos from central-perspective aerial photographs, the latter being differentially rectified with due consideration of the photographic conditions. More specifically, the invention relates to the art of printing alphanumerical characters by exposure into orthophotos whereby an orthophotomap is produced from the orthophoto.
In the production of rothophotos, an aerial photograph is subjected to meandering displacement relative to an optical imaging system, and only a small section ofthe picture is ` exposed at any given time. These small sections, which are corrected with respect to position, enlargement and rotation as a function of location of terrain, height of terrain, inclination of terrain slope and camera inclination, are imaged onto another film which is synchronously displaced with respect to the imaging system; and the orthophoto is created from the sequential juxtaposition of the imaged sections. For a useful orthophotomap to result from ortho-photos obtained in this manner, it is necessary to print certain characters, numbers or symbols both on the marginal edge and also within the map area of the orthophoto. Such characters, numbers, or symbols may, for example, be control : points or sheet corners or the terrain coordinates thereof, names of localities and fields, or the like.
In prior art practice, the completed orthophoto is subsequently provided with such characters. More par-ticularly, after removal of the orthophoto from the mapping apparatus, a mask is applied which contains all additional symbols in the configuration specifically necessary for the orthophoto in question, and then the entire orthophoto is ~, . ...
1 15~96 again exposed, using this mask, effectively superposed.
The object of the present invention is to reduce the time and expense involved in the production of ortho-photomaps from orthophotos. The invention achieves this object by using the same ortho-projection imaging system both for exposure of the orthophoto and for exposure of the characters, numbers or symbols on the orthophoto film, stencil means being introduced onto the projection-ray path and sequentially displaced and exposed as appropriate for character or symbol projection on the orthophoto film.
The advantage of this solution is that one can dispense with production of masks whichare specially adapted ; to various orthophotos, and this represents a great saving of expense, with respect to personnel and time. Furthermore, no additional apparatus is required, as has hitherto been needed for exposure of the entire orthophoto with a mask.
On the other hand, the invention enables exposure of the additional characters and symbols on the orthophoto film just before or immediately after the orthophoto has been made and while it is still in the orthophoto apparatus.
Illustratively, individual characters and word symbols are developed by sequential exposure of individual characters and letters, by such coordinated displacement of the stencil as to bring particular characters, etc. within the ray path.
In this connection, the means for change of scale, rotation and change of light intensity of the projected sections of the aerial photograph, being available features in the ortho-projector, can be advantageously used to change size, character orientation and contrast of the imaged characters, as desired in the instantaneously projected image on the orthophoto film.
No serious measures need be adopted within the
In the production of rothophotos, an aerial photograph is subjected to meandering displacement relative to an optical imaging system, and only a small section ofthe picture is ` exposed at any given time. These small sections, which are corrected with respect to position, enlargement and rotation as a function of location of terrain, height of terrain, inclination of terrain slope and camera inclination, are imaged onto another film which is synchronously displaced with respect to the imaging system; and the orthophoto is created from the sequential juxtaposition of the imaged sections. For a useful orthophotomap to result from ortho-photos obtained in this manner, it is necessary to print certain characters, numbers or symbols both on the marginal edge and also within the map area of the orthophoto. Such characters, numbers, or symbols may, for example, be control : points or sheet corners or the terrain coordinates thereof, names of localities and fields, or the like.
In prior art practice, the completed orthophoto is subsequently provided with such characters. More par-ticularly, after removal of the orthophoto from the mapping apparatus, a mask is applied which contains all additional symbols in the configuration specifically necessary for the orthophoto in question, and then the entire orthophoto is ~, . ...
1 15~96 again exposed, using this mask, effectively superposed.
The object of the present invention is to reduce the time and expense involved in the production of ortho-photomaps from orthophotos. The invention achieves this object by using the same ortho-projection imaging system both for exposure of the orthophoto and for exposure of the characters, numbers or symbols on the orthophoto film, stencil means being introduced onto the projection-ray path and sequentially displaced and exposed as appropriate for character or symbol projection on the orthophoto film.
The advantage of this solution is that one can dispense with production of masks whichare specially adapted ; to various orthophotos, and this represents a great saving of expense, with respect to personnel and time. Furthermore, no additional apparatus is required, as has hitherto been needed for exposure of the entire orthophoto with a mask.
On the other hand, the invention enables exposure of the additional characters and symbols on the orthophoto film just before or immediately after the orthophoto has been made and while it is still in the orthophoto apparatus.
Illustratively, individual characters and word symbols are developed by sequential exposure of individual characters and letters, by such coordinated displacement of the stencil as to bring particular characters, etc. within the ray path.
In this connection, the means for change of scale, rotation and change of light intensity of the projected sections of the aerial photograph, being available features in the ortho-projector, can be advantageously used to change size, character orientation and contrast of the imaged characters, as desired in the instantaneously projected image on the orthophoto film.
No serious measures need be adopted within the
-2-11S~696 orthoprojector. The stencil, which contains all necessary L
characters and symbols, may be arranged in the vicinity of a plane which is conjugate to the image plane; alternatively, and with particular advantage, the stencil may simply be mounted at a marginal edge of the support for the aerial photograph, in that this support already has two-component r displacement capability, with respect to the imaging system.
..
It is advantageous to removably mount the stencil on its support, thereby enabling simple replacement of the stencil, should other characters (for instance Cyrillic script) be required to produce another series or orthophoto-maps.
To shut off illumination while displacing the stencil, the lamp of the illumination system in the ortho-projector is advantageously either masked, or an aperture in the imaging-ray path can be closed.
The invention, as herein broadly claimed, essentially lies in an orthophoto-mapping apparatus of the character wherein a first support is adapted to mount an aerial photograph, wherein a second support is adapted to mount a photosensitive sheet to be exposed for creation of a rectified orthophoto rendition of the photograph, wherein an optical-projection system is responsive to a limited area of the aerial photograph to project an image of said limited area for exposure to the photosensitive sheet, wherein scanning-drive means is operative upon said supports with respect to said optical-projection system to effect coordinated scanning of the photograph wi-th scanning projection of the image, and wherein means including a computer is operative to so offset scan action at said second support with respect to scan action at said first support and to so control movable elements of the optlcal-projection system as a function of instantaneous scan . .
.: .
coordinates that a rectified orthophoto image exposure is produced on said sheet, the improvement in which a master rendition of plural characters or symbols is mounted in the scanning surface of said first support and at a location offset from the mounted aerial photograph, and in which said computer is selectively operable upon said scanning-drive meaAs to so position said irst support with respect to said optical system that the limited-area optical response is at a selected one of the characters or symbols of said master rendition, and in which said computer is also selectively operable upon said scanning-drive means -to so position the limited-area image projection of the selected character or symbol that the projected character or symbol image is caused to photo-expose a desired local region of the rectified orthophoto rendition.
A preferred embodiment of the invention will now ; be described in reference to the accompanying drawings, in which:
Fig. 1 is a simplified view in perspective, diagrammatically showing optical and mechanical components of a !'~' 20 traditional orthoprojector, having an aerial-photograph support which may be used in the method of the invention; and Fig. 2 is an enlarged plan view of the aerial-photograph support of Fig. 1, modified in accordance with the invention, together with its positioning drives and control means therefor.
The orthoprojector of Fig. 1 has a transparent support or plate 1 which has two-component (X-Y) displaceability in a plane and is adapted to mount the aerial photograph 13 ; shown in Fig. 2. When placed on the support 1, an elemental a~ea of the aerial photograph 13 is illuminated - 3a -.. . .
~ .
1 ~55696 by a lamp 2, via an optical system 3 of lenses and prisms, and is imaged by means of another lens system onto a film, carried by a drum 12, where the orthophoto is produced.
The imaging optical system consists, inter alia, of a zoom system 4 for changing the reproduction scale, a carriage 6 by which a mirror or an image-inverting prism can be selectively brought into the ray path, an image-rotating prism 7, and a gray wedge 8 by which brightness of the instan-taneously projected image segment can be controlled. Further, 10 the imaging system includes a beam-splitting prism 9 to provide a viewing-ray path for a binocular tube 5, and a rotatable disk diaphragm 11 which is displaceable along an axis parallel to the rotary axis of drum 12; such rotary and rectilineal displaceability of diaphragm 11 will be understood to determine the size and position of instantaneously projected narrow aerial-photograph segments.
In the developing exposure which creates an ortho-photo image in the film carried by drum 12, rectilineal displacement od diaphragm 11 determines image-segment location along the X-axis; and in the Y-direction, the position of image segments is determined by the angle of rotation of drum 12. It will also be understood that the reflecting prism 10 is separately displaceable along the X-axis (i.e., parallel to the drum axis) and serves to maintain the optical path-length constant, between the fixed prism 9 and a folding prism above the selected portion of the revolving-disk diaphragm 11.
As shown in Fig. 2, the transparent picture support or plate 1, which is mounted in the manner of a compound slide, bears an opaque stencil 15, for instance of metal, in which alphanumerical characters and symbols are etched in the form of windows; stencil 15 is removably mounted to plate 1 along a margin of the mounted aerial photograph 13, the latter . , .
. . .
1 15~96 being shown removably held by clamps 14. Separate motors 16-18 impart X-Y component displacement to the support 1, within a plane perpendicular to the optical axis of the respective illumination and imaging lens systems. Motors 16-18 are controlled by a unit 20, and each of them has a position indicator 17-19 which reports the existing position of the support 1. Unit 20 also controls drives ~not shown) for drum 12 and for movable elements of the imaging and illuminating lens systems; in Fig. 2, such drive connections are merely suggested by output lines which are identified by the reference number or numbers of the positionable elements with which they have motion-controlling connection.
Control commands for picture rectification are received by unit 20 from a computer 21, whereby control data, which may illustratively be in the form of terrain coordinates, is converted into picture coordinates, with appropriate correction for properties of the aerial camera which produced the aerial photograph 13.
In operation, in a first program step, the inner and outer orientation of the aerial photograph 13 is ascertained from frame marks, after a comparison of the image positions of known control points with prescribed terrain coordinates, furnished by the computer (Orient Program). Thereupon, the aerial photograph support 1 is displaced meanderingly with respect to the imaging lens system (Scan Program); at the same time, other movable elements driven by unit 20 effect rectification, whereby necessary corrections in position, size, rotation and brightness, as determined by the computer 21, are ` applied to the projected-image sections of the picture, i.e., -; at the orthophoto film carried by drum 12.
In the last program step (Print Program?, the computer 21 establishes an unambiguous relationship between , . .
' :
1 ~5~6~6 the characters of its imput keyboard and the position of the alphanumerical characters and symbols on the stencil 15 associated with them. In this way, by actuating the keyboard of the computer 21, the operator can selectively introduce into the imaging-ray path the stencil (15) characters which are desired for the legends on the orthophoto at 13 they are then effectively printed, by projecting them for exposure onto the orthophoto film. During the Print Program, and while imaged individual characters are being moved into desired orthophoto-exposure position, shutter 23 in the imaging-ray d path is closed, to effectively shut off light from source 2;also during the Print Program, character exposure to the orthophoto film is via a pinhole 22, which is swung into the ray path, for one of the rotationally indexed positions of the disk diaphragm 11.
The size and the desired orientation of the imaged symbols and characters are respectively determined by control-led displacement at the zoom system 4 and at the image- `
rotating prism 7; and by means of the gray wedge 8, the contrast of the printed images can be preselected. Finally, by shifting carriage 6 to place a bi-lateral reflecting prism in the ray path, instead of a single-reflecting mirror, the projected character images are reversed, thus providing an increased number of distinguishable characters.
; A punctiform pinhole 24 on the stencil 15 permits effective inscription of lines in the orthophoto when the drum 12 rotates and/or when diaphragm 11 is displaced; this ; corresponds to coordinate movement of the picture support 1 while the exposure is being effected. In this connection, the thickness of the inscribed line can be preselected via -~ displacement within the zoom system 4.
' .
.
:^': '
characters and symbols, may be arranged in the vicinity of a plane which is conjugate to the image plane; alternatively, and with particular advantage, the stencil may simply be mounted at a marginal edge of the support for the aerial photograph, in that this support already has two-component r displacement capability, with respect to the imaging system.
..
It is advantageous to removably mount the stencil on its support, thereby enabling simple replacement of the stencil, should other characters (for instance Cyrillic script) be required to produce another series or orthophoto-maps.
To shut off illumination while displacing the stencil, the lamp of the illumination system in the ortho-projector is advantageously either masked, or an aperture in the imaging-ray path can be closed.
The invention, as herein broadly claimed, essentially lies in an orthophoto-mapping apparatus of the character wherein a first support is adapted to mount an aerial photograph, wherein a second support is adapted to mount a photosensitive sheet to be exposed for creation of a rectified orthophoto rendition of the photograph, wherein an optical-projection system is responsive to a limited area of the aerial photograph to project an image of said limited area for exposure to the photosensitive sheet, wherein scanning-drive means is operative upon said supports with respect to said optical-projection system to effect coordinated scanning of the photograph wi-th scanning projection of the image, and wherein means including a computer is operative to so offset scan action at said second support with respect to scan action at said first support and to so control movable elements of the optlcal-projection system as a function of instantaneous scan . .
.: .
coordinates that a rectified orthophoto image exposure is produced on said sheet, the improvement in which a master rendition of plural characters or symbols is mounted in the scanning surface of said first support and at a location offset from the mounted aerial photograph, and in which said computer is selectively operable upon said scanning-drive meaAs to so position said irst support with respect to said optical system that the limited-area optical response is at a selected one of the characters or symbols of said master rendition, and in which said computer is also selectively operable upon said scanning-drive means -to so position the limited-area image projection of the selected character or symbol that the projected character or symbol image is caused to photo-expose a desired local region of the rectified orthophoto rendition.
A preferred embodiment of the invention will now ; be described in reference to the accompanying drawings, in which:
Fig. 1 is a simplified view in perspective, diagrammatically showing optical and mechanical components of a !'~' 20 traditional orthoprojector, having an aerial-photograph support which may be used in the method of the invention; and Fig. 2 is an enlarged plan view of the aerial-photograph support of Fig. 1, modified in accordance with the invention, together with its positioning drives and control means therefor.
The orthoprojector of Fig. 1 has a transparent support or plate 1 which has two-component (X-Y) displaceability in a plane and is adapted to mount the aerial photograph 13 ; shown in Fig. 2. When placed on the support 1, an elemental a~ea of the aerial photograph 13 is illuminated - 3a -.. . .
~ .
1 ~55696 by a lamp 2, via an optical system 3 of lenses and prisms, and is imaged by means of another lens system onto a film, carried by a drum 12, where the orthophoto is produced.
The imaging optical system consists, inter alia, of a zoom system 4 for changing the reproduction scale, a carriage 6 by which a mirror or an image-inverting prism can be selectively brought into the ray path, an image-rotating prism 7, and a gray wedge 8 by which brightness of the instan-taneously projected image segment can be controlled. Further, 10 the imaging system includes a beam-splitting prism 9 to provide a viewing-ray path for a binocular tube 5, and a rotatable disk diaphragm 11 which is displaceable along an axis parallel to the rotary axis of drum 12; such rotary and rectilineal displaceability of diaphragm 11 will be understood to determine the size and position of instantaneously projected narrow aerial-photograph segments.
In the developing exposure which creates an ortho-photo image in the film carried by drum 12, rectilineal displacement od diaphragm 11 determines image-segment location along the X-axis; and in the Y-direction, the position of image segments is determined by the angle of rotation of drum 12. It will also be understood that the reflecting prism 10 is separately displaceable along the X-axis (i.e., parallel to the drum axis) and serves to maintain the optical path-length constant, between the fixed prism 9 and a folding prism above the selected portion of the revolving-disk diaphragm 11.
As shown in Fig. 2, the transparent picture support or plate 1, which is mounted in the manner of a compound slide, bears an opaque stencil 15, for instance of metal, in which alphanumerical characters and symbols are etched in the form of windows; stencil 15 is removably mounted to plate 1 along a margin of the mounted aerial photograph 13, the latter . , .
. . .
1 15~96 being shown removably held by clamps 14. Separate motors 16-18 impart X-Y component displacement to the support 1, within a plane perpendicular to the optical axis of the respective illumination and imaging lens systems. Motors 16-18 are controlled by a unit 20, and each of them has a position indicator 17-19 which reports the existing position of the support 1. Unit 20 also controls drives ~not shown) for drum 12 and for movable elements of the imaging and illuminating lens systems; in Fig. 2, such drive connections are merely suggested by output lines which are identified by the reference number or numbers of the positionable elements with which they have motion-controlling connection.
Control commands for picture rectification are received by unit 20 from a computer 21, whereby control data, which may illustratively be in the form of terrain coordinates, is converted into picture coordinates, with appropriate correction for properties of the aerial camera which produced the aerial photograph 13.
In operation, in a first program step, the inner and outer orientation of the aerial photograph 13 is ascertained from frame marks, after a comparison of the image positions of known control points with prescribed terrain coordinates, furnished by the computer (Orient Program). Thereupon, the aerial photograph support 1 is displaced meanderingly with respect to the imaging lens system (Scan Program); at the same time, other movable elements driven by unit 20 effect rectification, whereby necessary corrections in position, size, rotation and brightness, as determined by the computer 21, are ` applied to the projected-image sections of the picture, i.e., -; at the orthophoto film carried by drum 12.
In the last program step (Print Program?, the computer 21 establishes an unambiguous relationship between , . .
' :
1 ~5~6~6 the characters of its imput keyboard and the position of the alphanumerical characters and symbols on the stencil 15 associated with them. In this way, by actuating the keyboard of the computer 21, the operator can selectively introduce into the imaging-ray path the stencil (15) characters which are desired for the legends on the orthophoto at 13 they are then effectively printed, by projecting them for exposure onto the orthophoto film. During the Print Program, and while imaged individual characters are being moved into desired orthophoto-exposure position, shutter 23 in the imaging-ray d path is closed, to effectively shut off light from source 2;also during the Print Program, character exposure to the orthophoto film is via a pinhole 22, which is swung into the ray path, for one of the rotationally indexed positions of the disk diaphragm 11.
The size and the desired orientation of the imaged symbols and characters are respectively determined by control-led displacement at the zoom system 4 and at the image- `
rotating prism 7; and by means of the gray wedge 8, the contrast of the printed images can be preselected. Finally, by shifting carriage 6 to place a bi-lateral reflecting prism in the ray path, instead of a single-reflecting mirror, the projected character images are reversed, thus providing an increased number of distinguishable characters.
; A punctiform pinhole 24 on the stencil 15 permits effective inscription of lines in the orthophoto when the drum 12 rotates and/or when diaphragm 11 is displaced; this ; corresponds to coordinate movement of the picture support 1 while the exposure is being effected. In this connection, the thickness of the inscribed line can be preselected via -~ displacement within the zoom system 4.
' .
.
:^': '
Claims (6)
1. In an orthophoto-mapping apparatus of the character wherein a first support is adapted to mount an aerial photograph, wherein a second support is adapted to mount a photosensitive sheet to be exposed for creation of a rectified orthophoto rendition of the photograph, wherein an optical-projection system is responsive to a limited area of the aerial photograph to project an image of said limited area for exposure to the photosensitive sheet, wherein scanning-drive means is operative upon said supports with respect to said optical-projection system to effect coordinated scanning of the photograph with scanning projection of the image, and wherein means including a computer is operative to so offset scan action at said second support with respect to scan action at said first support and to so control movable elements of the optical-projection system as a function of instantaneous scan coordinates that a rectified orthophoto image exposure is produced on said sheet, the improvement in which a master rendition of plural characters or symbols is mounted in the scanning surface of said first support and at a location offset from the mounted aerial photograph, and in which said computer is selectively operable upon said scanning-drive means to so position said first support with respect to said optical system that the limited-area optical response is at a selected one of the characters or symbols of said master rendition, and in which said computer is also selectively operable upon said scanning-drive means to so position the limited-area image projection of the selected character or symbol that the projected character or symbol image is caused to photo-expose a desired local region of the rectified orthophoto rendition.
2. The improvement of claim 1, in which the optical-projection system includes zoom-lens means, whereby character or symbol projection to the photosensitive sheet may be at selected scale with respect to the master rendition.
3. The improvement of claim 1, in which the optical-projection system includes a rotatable image-rotating prism whereby character or symbol projection may be at selected orientation with respect to the master rendition.
4. The improvement of claim 1, in which the optical-projection system includes a movable optical wedge, whereby character or symbol projection may be at selected attenuation and therefore contrast with respect to the master rendition.
5. The improvement of claim 1, in which the optical-projection system includes means for imaging a spot of predeter-mined size upon the photosensitive sheet, and in which said computer is selectively operable upon said drive means while said spot is being imaged, whereby a predetermined line of imaged-spot width is exposed-on said sheet.
6. The improvement of claim 5, in which the optical-projection system includes zoom-lens means, whereby the width of the predetermined line may be selected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803047519 DE3047519C2 (en) | 1980-12-17 | 1980-12-17 | Process for imprinting characters in orthophotos |
| DEP3047519.5 | 1980-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1155696A true CA1155696A (en) | 1983-10-25 |
Family
ID=6119394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000380136A Expired CA1155696A (en) | 1980-12-17 | 1981-06-18 | Orthophoto-mapping apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1155696A (en) |
| CH (1) | CH652220A5 (en) |
| DE (1) | DE3047519C2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD218695A1 (en) * | 1983-08-01 | 1985-02-13 | Zeiss Jena Veb Carl | PROCEDURE FOR INSERTED ANY SIGN IN ORTHOPHOTOS |
| DD217732B1 (en) * | 1983-08-01 | 1987-03-04 | Schichtpressstoffwerk Veb | PROCESS FOR GRINDING CIRCULAR SHARING BLADES |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3900859A (en) * | 1974-01-15 | 1975-08-19 | O M I Corp Of America | Apparatus and method for optical annotation of orthophotographs |
| DE2509681A1 (en) * | 1975-03-06 | 1976-09-09 | Kern & Co Ag | Prodn method for orthophotographs - has coordinate and profile registering system driving synchronised projector |
| JPS6013163B2 (en) * | 1977-03-26 | 1985-04-05 | 日立造船株式会社 | Scanning device for models etc. |
| JPS554073A (en) * | 1978-06-26 | 1980-01-12 | Konishiroku Photo Ind Co Ltd | Original position assignment mechanism of information compound recorder |
-
1980
- 1980-12-17 DE DE19803047519 patent/DE3047519C2/en not_active Expired
-
1981
- 1981-01-12 CH CH14781A patent/CH652220A5/en not_active IP Right Cessation
- 1981-06-18 CA CA000380136A patent/CA1155696A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3047519A1 (en) | 1982-07-22 |
| DE3047519C2 (en) | 1984-03-22 |
| CH652220A5 (en) | 1985-10-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |