METHOD OF PRODUCING AND DISPLAYING AN AERIAL PHOTOGRAPH DATA SET

• US 20080063299A1
• Filed: 09/08/2006
• Published: 03/13/2008
• Est. Priority Date: 08/08/2006
• Status: Active Grant

• Current Assignee: Kokusai Kogyo Company Limited (Taiheiyo Cement Corporation)
• Original Assignee: Kokusai Kogyo Company Limited (Taiheiyo Cement Corporation)
• Inventors: TAKEDA, Hiroshi, MURAI, Shunji, OYAMA, Yoichi, MINAMI, Yoshihiko, AKAMATSU, Yukio
• Granted Patent: US 7,848,593 B2
• Time in Patent Office: Days
• US Class Current: 382/284
• CPC Class Codes: G01C 11/00 Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text

Abstract

In the method of obtaining captures images, there is overlaps in images in the flight direction and in a direction (cross direction) that crosses the flight direction. A predetermined number of the captured images containing overlapping sections that include a target point are selected out of the obtained images in the flight direction and/or the cross direction. From the overlap sections of these captured images, selected images are obtained by selecting image sections within a specific range that contains the target point. Using the flight direction and the cross direction as axes for a matrix, the selected images are arranged to create an aerial photograph data set.

Claims

1. A method for creating an aerial photograph data set. comprising

a step of selecting, in a direction of air flight(flight direction) for aerial photography and/or in the cross direction crossing the flight direction out of a plurality of captured images obtained in the aerial photography, M×

N captured images (where M and N are positive integers of no more than 1/(1−

A) and 1/(1−

B) respectively) which captured images include a target point in an overlap section, wherein A is an endlap ratio in the flight direction (wherein A=1 indicates complete overlap, and 0≦

A<

1), while B being a sidelap ratio in the cross direction (wherein B=1 indicates complete overlap, and 0≦

B<

1),

a step of producing selected images by selecting an image section in a specific range in each of the selected captured image which range includes the target point in the overlap section. and

a step of creating, along the flight direction serving as a first axis and the cross direction serving as a second axis, an data set as a matrix with M columns along the first axis and N rows along the second axis, in imaging sequence along the first axis and in imaging sequence along the second axis respectively.

2. A method for creating an aerial photograph data set according to claim 1 in which the image sections are obtained so that the spatial position of the target point is put at the center of the image section through back projection with correction for orientation parameters.

3. A method for creating an aerial photograph data set according to claim 1 wherein, using a virtual spatial position in which the spatial position is positioned at a predetermind distance for a new target point from the target point, the method further comprising steps of repeating the method for creating the aerial photography image data set for the new target point, repeating the positioning the new target point for other new target point(s) in the flight direction and in the cross direction, for creating a plurality of aerial photography image data sets.

4. A method for creating an aerial photograph data set according to claim 1, further comprising a step of shifting the target point for a new target point with a predetermind distance wherein the aerial photography image data set is used as a first set,

a step of creating a new aerial photograph data set for the new target point in the same way for the first set,

a step of repeating the steps of shifting and creating in both the forward direction and the reverse direction of the flight direction and in both the forward direction and the reverse direction of the cross direction to provide new target points and new aerial photograph data sets for P times on one side of the flight direction and Q times on one side of the cross direction (where P and Q are positive integers) for creating the ((2P+1)×

(2Q+1)−

1) new target points and new aerial photograph data set,

a step of selecting one specific image is selected from each of the (2P+1)×

(2Q+1) (including the first set) aerial photography image data sets. a step of positioning the specific image from the first set iat the center while the specific images selected from the P and Q shifted aerial photography image data sets is positioned corresponding to their respective shifts.

5. A method for creating an aerial photography image data set according to claim 4 wherein the specific images are selected from the same row and same column from the aerial photography image data sets.

6. A method for creating an aerial photograph data set according to claim 4 wherein P=Q=1.

7. A method for creating an aerial photograph data set according to claim 1 comprising further a step of inputting the spatial position of the target point.

8. A method for creating an aerial photograph data set according to claim 1 wherein L×

L (where L is an integer that is no more than the smaller of M and N) of the selected images adjacent to each other are selected from the image set while a specific image set is created by arranging the selected images in an L×

L matrix in the arrangement of the image set.

9. A method for creating an aerial photography image data set according to claim 1 wherein A=B and M=N.

10. A method for creating an aerial photograph data set according to claim 9 wherein A=B=0.8 or approximately 0.8, while M=N=5.

11. A method for creating an aerial photograph data set according to claim 1 wherein the selected image is rectangular.

12. A method for creating an aerial photograph data set according to claim 11 wherein the aspect ratio of the rectangle is 2:

1 or roughly 2;

1.

13. An aerial photograph data set produced by claim 1.

14. An aerial photograph data set according to claim 13 in which the image sections are obtained so that the spatial position of the target point is put at the center of the image section through back projection with correction for orientation parameters.

15. An aerial photograph data set according to claim 13 wherein, using a virtual spatial position in which the spatial position is positioned at a predetermind distance for a new target point from the target point, the method further comprising steps of repeating the method for creating the aerial photography image data set for the new target point, repeating the positioning the new target point for other new target point(s) in the flight direction and in the cross direction, for creating a plurality of aerial photography image data sets.

16. An aerial photograph data set produced according to claim 13.

17. An aerial photograph data set produced according to claim 16 wherein the specific images are selected from the same row and same column from the aerial photography image data sets.

18. An aerial photography image data set according to claim 16 wherein P=Q=1.

19. An aerial photograph data set produced according to claim 8.

20. An aerial photograph data set according to claim 13 wherein A=B and M=N.

21. An aerial photograph data set according to claim 20 wherein A=B=0.8 or ≅

0.8, and M=N=5.

22. An aerial photograph data set according to claim 13 wherein the selected image is rectangular.

23. An aerial photography image data set according to claim 22 wherein the aspect ratio of the rectangle is 2:

1 or roughly 2;

1.

24. A method for displaying an aerial photograph data set comprising a step of displaying, in the matrix form, a desired number of vertical and horizontal images selected from the aerial photograph data set of claim 13.

25. A method for displaying an aerial photograph data set according to claim 24 in which the image sections are obtained so that the spatial position of the target point is put at the center of the image section through back projection with correction for orientation parameters.

26. A method for displaying an aerial photography image data set according to claim 24 wherein the aerial photography image data set is produced according claim 4.

27. A method for displaying an aerial photography image data set according to claim 26 wherein the specific images are selected from the same row and same column from the aerial photography image data sets.

28. A method for displaying an aerial photography image data set according to claim 26 wherein P=Q=1.

29. A method for displaying an aerial photography image data set according to claim 24 wherein L×

L (where L is an integer that is no more than the smaller of M and N) of the selected images adjacent to each other are selected from the image set while a specific image set is created by arranging the selected images in an L×

L matrix in the arrangement of the image set.

30. A method for displaying an aerial photography image data set according to claim 24 wherein A=B while M=N.

31. A method for displaying an aerial photography image data set according to claim 30 wherein A=B=0.8 or ≅

0.8, while M=N=5.

32. A method for displaying an aerial photography image data set according to claim 24 wherein the selected image is rectangular.

33. A method for displaying an aerial photography image data set according to claim 32 wherein the aspect ratio of the rectangle is 2:

1 or roughly 2;

1.