JPH0353237A - Aerially photographed image processor - Google Patents

Abstract

PURPOSE:To stereoscopically view continuous still images by successively viewing the image of R with a right eye and the image of L with a left eye out of the continuous images obtained by combining R and L between which the position of a television camera is specified distance apart. CONSTITUTION:The combination of two aerially photographed images are taken as R and L. R and L having the same number, that means, R1 and L1, R2 and L2 ... are image-picked up so that respective image pickup areas may be overlapped to 60-70% and the image pickup distance between R1 and R2, R2 and R3 ... is set as the fixed one. They are successively stored in a memory every image in order of R and L to update the contents stored in the memory every specified time. Next, only the image where R and L are overlapped is displayed on an image display device 5 in order of R1, L1, R2, L2 ... at intervals of specified time. Then, an operator views a display screen through an eye shutter by the use of the eye shutter for alternately putting a shutter on the lift and right eyes in synchronism with the interval of the display time of each screen for R and L. Thus, the display screen is stereoscopically viewed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method of capturing images of the ground surface from the air using an imaging device such as a television camera (hereinafter collectively referred to as a television camera) mounted on an aircraft. The present invention relates to an aerial image processing device that performs image processing on aerial images to enable stereoscopic visualization.

[Prior Art] Mounting a television camera on an aircraft to obtain aerial images of the earth's surface from the air, and conducting surveys and explorations of the earth's surface using the images obtained is a field of resource exploration,
This is carried out in the environmental investigation field, erosion control investigation field, etc.

Conventionally, when performing stereoscopic visualization of such aerial images, a still camera is mounted on an aircraft, and the target aerial photography range is photographed by overlapping multiple navigations. Therefore, images that can be visualized stereoscopically are limited to fixed still images.

[Problems to be solved by the invention] With the conventional methods described above, continuous still images cannot be visualized in 3D, and it is not possible to perform 3D measurement of a measurement target using aerial images. The problem was that it couldn't be done.

This invention was made in order to solve such problems, and it performs image processing on aerial images obtained from a single television camera, and enables continuous still images to be visualized in 3D. The aim is to obtain an aerial image processing device that enables measurement. [Means for Solving the Problems] The aerial image processing device according to the present invention uses a single aircraft equipped with a television camera to process images of each other at predetermined time intervals along the direction of travel of the aircraft. is 60%~7
Aerial images are taken continuously using combinations of R and L that overlap at a rate of about 0%, and R and L of these aerial images are displayed on the image display device alternately. In addition to sequentially displaying only the overlapping portions, the operator views this displayed image through an eye shutter synchronized with the displayed image, so that the continuous R image is visible only to the right eye.
The continuous streak image is visible only to the left eye.

[Function] In this invention, as the aircraft moves, the position of the television camera is a continuous set of R and L images separated by a predetermined distance, and the R image is viewed sequentially with the right eye and the L image is viewed sequentially with the left eye. This makes it possible to stereoscopically view each combination of R and L as one unit.

[Example 1] An example of the present invention will be described below with reference to the drawings. Figures 1 and 2 are diagrams for explaining the imaging method according to the present invention. Figure 1 is a perspective view thereof, and Figure 2 is a diagram showing the imaging area on the ground surface. In this embodiment, one television camera is mounted on one aircraft, and the R.O.C. ,L. R2, L2
The images are taken in this order. In this case, let R in the same order, that is, R1 and L,, R2 and L2...
Images are taken so that their respective imaging areas overlap by 60% to 70%, and the imaging intervals of R1 and R2, R2 and R3, . . . are set at constant intervals (for example, at intervals of Δt seconds). The aerial images taken in this manner are stored in a memory in the order of R and L one image at a time, and the stored contents of this memory are updated every Δt seconds.

Next, among the aerial images stored in the memory in this way, R
Only the images in which and L overlap are displayed at a predetermined time interval (
For example, 15 images/sec), R1+L l, R2,
L2... are displayed on an image display device such as a television monitor. This is shown in FIG.

Therefore, when an operator views this display with both eyes, the R and L images simply appear to overlap, but the display time interval between the R and L screens (
For example, by using an eye shutter that alternately shutters the left and right eyes in synchronization with the image speed (for example, 15 images/sec), and viewing the display screen through the eye shutter, the display screen can be viewed stereoscopically.

In other words, when the R image is displayed on the display screen, the shutter closes and the operator's left eye cannot see the display screen, and when the L image is displayed on the display screen, the operator's right eye The shutter closes and the display screen becomes invisible. In other words, in the right eye, the image of R (Rl, R
2...>, the left eye always sees the L image (Lr, L2
), and by repeating this kind of control, the real image and the afterimage, which are seen alternately by both the left and right eyes, do not overlap and can be visualized in 3D. You can view continuous still images in 3D.

Next, a method for performing three-dimensional measurement of a measurement target will be described. In order to perform three-dimensional measurement of the object to be measured, data regarding the aircraft's ground height, ground speed, and direction of movement are used.

From the relationship between the average moving speed V of the aircraft and the time difference (Δt2-Δtl), if the total number of pixels on the horizontal axis on the display screen is Dx, then the dimension of the measurement target in the plane direction is the plane of the measurement target. Scale factor K for directional dimensions. is K1
= (Δt2-Δt1〉・V/D x, and the average dimension of the object to be measured in the plane direction can be determined by the number of pixels XK1.The dimension H of the object to be measured in the height direction is the ground clearance of the aircraft. From the relationship between Ha and the horizontal axis of the display screen, H = (number of pixels in the horizontal axis direction of the object to be measured> XKI /COS θ Dt is the number of pixels in the horizontal axis direction from the left edge of the screen to the object.) FIG. 4 is a block diagram showing an example of an apparatus for carrying out the present invention, in which (1) is a television camera;
2> is the receiving device, (3> is the image processing device, (4> is the VT
R, (5) is an image display device such as a television monitor, (6)
(7> is a printer, (8> is an eye shutter composed of, for example, a liquid crystal electronic shutter, etc.), and (9) is an operator. As shown in Fig. 4, in this example, one aerial camera An aerial photographic image is obtained with one television camera (1), this is received by a receiving device (2) through a wireless line, and the received aerial photographic image is subjected to image processing by an image processing device w (3). Display it directly on the image display device (5) or record it on the VTR (4) and then display it on the VTR (4).
) and display it on the image display device (5). As described above, the display principle is to alternately and continuously display the R and L screens at predetermined time intervals. Operator (9)
Place the eye shutter (8) on your head and put the image display device (5) on your head.
By visually viewing the display screen, continuous still images can be viewed in 3D, dramatically increasing the amount of information obtained from the display screen, and making it possible to make accurate visual judgments. ．． In addition, if necessary, select an object to be measured by operating the keyboard (6), perform three-dimensional measurement of the selected object by the built-in CPU using the calculation method described above, and send the results to the printer (7). Since 3D measurements of objects to be measured can be easily performed in this way, it becomes possible to quickly provide information that is advantageous in terms of disaster prevention, especially in planning disaster countermeasures.

[Effect of the invention] As explained above, this invention provides
The TV camera position is a series of images of combinations of R and L separated by a predetermined distance, and by viewing the R images sequentially with the right eye and the L images sequentially with the left eye, each combination of R and L is integrated into a three-dimensional image. It has the advantage of being able to be visualized, making it possible to visualize continuous still images in 3D, and easily performing 3D measurement of the object to be measured using aerial images.

[Brief Description of the Drawings] Figures 1 and 2 are diagrams for explaining the imaging method of the present invention, Figure 3 is a diagram for explaining display contents on an image display device, and Figure 4 is a diagram for explaining the image capturing method of the present invention. FIG. 1 is a block diagram showing an example of an apparatus for carrying out the invention.

Claims (1)

[Claims] A single aircraft equipped with a single imaging device captures 60% to 70% of each other's aerial images along the direction of travel of the aircraft.
An image capturing means that sequentially captures a combination of two aerial images (assuming this combination is R and L) so that the images overlap at a certain rate; display means for sequentially displaying an overlapping portion of R and L of an aerial photographed image, alternating between R and L in the order of combination; (or the left eye), the continuous L images appear only in the left eye (or the left eye).
An aerial image processing device equipped with an eye shutter that controls the view only to the right eye.