Photogrammetric analytical measurement system

• US 6,304,669 B1
• Filed: 11/09/1998
• Issued: 10/16/2001
• Est. Priority Date: 11/10/1997
• Status: Expired due to Fees

• Current Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Original Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Inventors: Nakayama, Toshihiro, Hara, Masato, Kaneko, Atsumi, Wakashiro, Shigeru, Kida, Atsushi
• Primary Examiner(s): Mancuso, Joseph
• Assistant Examiner(s): Bali, Vikkram
• Application Number:
  US09/188,329
• Time in Patent Office: 1,072 Days
• Field of Search: 382/103, 382/106, 382/154, 382/285, 382/286, 382/209, 382/151, 348/42, 348/47, 348/48, 348/50, 356/3, 356/3.01, 702/42, 702/152, 702/159, 702/150, 702/151
• US Class Current: 382/154
• CPC Class Codes: G01C 11/06 by comparison of two or more pictures of the same area

Abstract

A photogrammetric measurement system produces a survey map based on a set of photographed pictures obtained at two different photographing positions. Each of the pictures includes at least one continuous line and at least three conspicuous points away from the continuous line, with at least one of the conspicuous points and remaining conspicuous points being placed at opposing sides of the continuous line. The set of pictures are produced as a first picture and a second picture. First lines are produced between the conspicuous points on the first picture such that the lines intersect the continuous line, thereby generating intersecting points. Second lines are produced between the conspicuous points on the second picture such that the lines intersect the continuous line, thereby generating further intersecting points. A set of corresponding intersecting points are designated on the first and second pictures, and intersecting points are produced on the survey map based on the designated corresponding intersecting points. A line, connecting the intersecting points, is thus produced on the survey map.

Claims

1. A photogrammetric measurement system for producing a survey map based on a set of photographed pictures obtained at two different photographing positions, each of said photographed pictures including at least one continuous line image and at least three conspicuous point images off said continuous line image, at least one of said conspicuous point images and remaining conspicuous point images being placed at opposing sides of said continuous line image, said photogrammetric measurement system comprising:

a display unit that displays said set of photographed pictures as a first photographed picture and a second photographed picture;

a first line-producing system that produces a first set of line images between said conspicuous point images on said first photographed picture such that said first set of line images intersect said continuous line image so as to generate intersecting point images;

a second line-producing system that produces a second set of line images between said conspicuous point images on said second photographed picture such that said second set of line images intersect said continuous line image so as to generate intersecting point images;

a designating system that designates a set of corresponding intersecting point images on said first and second pictures;

an intersection-point-image producing system that produces intersecting points on said survey map based on said designated corresponding intersecting point images; and

a drawing system that draws a line, connecting said produced intersecting points, on said survey map.

2. A photogrammetric measurement system as set forth in claim 1, wherein the production of said intersecting points on said survey map is performed by solving collinear equations on the basis of respective two-dimensional positions of said intersecting point images on said first and second pictures.

3. A photogrammetric measurement system as set forth in claim 1, further comprising:

a determining system that determines said line to be drawn is one of a curved line and a straight line; and

a selecting system that selects a type of said curved line and said straight line that is drawn.

4. A photogrammetric measurement system as set forth in claim 1, wherein said first line-producing system is constituted such that said first set of line images is regularly produced between said conspicuous point images in such a manner that a maximum number of said intersecting point images is generated, and said second line-producing system is constituted such that said second set of line images is regularly produced between said conspicuous point images in such a manner that a maximum number of said intersecting point images is generated.

5. A photogrammetric measurement method of producing a survey map based on a set of photographed pictures obtained at two different photographing positions, each of said photographed pictures including at least one continuous line image and at least three conspicuous point images off said continuous line image, at least one of said conspicuous point images and remaining conspicuous point images being placed at opposing sides of said continuous line image, said photogrammetric measurement method comprising the steps of:

displaying said set of photographed pictures as a first photographed picture and a second photographed picture;

producing a first set of line images between said conspicuous point images on said first photographed picture such that said first set of line images intersect said continuous line image so as to generate intersecting point images;

producing a second set of line images between said conspicuous point images on said second photographed picture such that said second set of line images intersect said continuous line image so as to generate intersecting point images;

designating a set of corresponding intersecting point images on said first and second pictures;

producing intersecting points on said survey map based on said designated corresponding intersecting point images; and

drawing a line, connecting said produced intersecting points, on said survey map.

6. A photogrammetric measurement method as set forth in claim 5, wherein the production of said intersecting points on said survey map is performed by solving collinear equations on the basis of respective two-dimensional positions of said intersecting point images on said first and second pictures.

7. A photogrammetric measurement method as set forth in claim 5, further comprising the steps of:

determining whether said line to be drawn is one of a curved line and a straight line; and

selecting a type of said curved line and said straight line that is drawn.

8. A photogrammetric measurement method as set forth in claim 5, wherein said first set of line images is regularly produced between said conspicuous point images in such a manner that a maximum number of said intersecting point images is generated, and said second set of line images is regularly produced between said conspicuous point images in such a manner that a maximum number of said intersecting point images are generated.