JP2934407B2 - Evaluation method of remote image - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for evaluating shade. More specifically, the present invention relates to a method for remotely evaluating a shadow, which can easily evaluate the influence of a certain object at an arbitrary point on the periphery of the object at a remote place, and a certain object and landscape at a measurement target point. And the like at an arbitrary point.

[0002]

2. Description of the Related Art When evaluating how a shadow caused by an object present at an arbitrary point affects the periphery of the object, the shadow of the object at the arbitrary point is determined by various methods. Need to measure. However, not all measurements can be performed at an arbitrary point, and under certain circumstances, measurement at an arbitrary point may be difficult and impossible. Such a situation, for example,
When the arbitrary point where the object to be measured exists is located on a very difficult to reach or difficult-to-measure terrain, or when the object to be measured such as a building is not installed at an arbitrary point, the object to be measured is In this case, it is assumed that the target object is installed at an arbitrary point, and the influence of the shade from the target object at the arbitrary point is evaluated.

In such a situation, the measurement must be performed not at an arbitrary point but at a remote place away from the arbitrary point up to a measurable point. In view of the above, the present invention provides a remote evaluation method of a shadow that can easily evaluate the influence of a shadow of an object at an arbitrary point on the periphery of the object in a remote place. It is intended to be.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for evaluating the influence of a certain object at an arbitrary point on the periphery of an object at a remote location, the method comprising: Two photographing devices equipped with one fish-eye lens or one photographing device equipped with two fish-eye lenses which are in a positional relationship separated by a certain distance. By photographing the measurement target object at the specific target point separated by a distance, and by moving the two obtained images in the radial direction and the circumferential direction from the positional relationship between the arbitrary point, the imaging point, and the measurement target point, A remote evaluation method of a shade is provided, wherein the captured image is a captured image at coordinates equivalent to the coordinates of an arbitrary point.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a method for evaluating the influence of a certain object at an arbitrary point on the periphery of an object at a remote place. By using two photographing apparatuses equipped with one fisheye lens or one photographing apparatus equipped with two fisheye lenses in a positional relationship, a photographing point separated from an arbitrary point by a certain distance at a photographing point separated from an arbitrary point by a certain distance is specified. The object to be measured at the target point is photographed, and the obtained 2 is obtained from the positional relationship between the arbitrary point, the photographing point, and the target point.
By moving two images in the radial and circumferential directions,
The photographed image is a photographed image at coordinates equivalent to the coordinates of an arbitrary point, and a sunshade and reflected light by an object at an arbitrary point are obtained by superimposing the sun trajectory on a remote place of the shadow. An image evaluation method, in which two photographing devices equipped with one fish-eye lens or one photographing device equipped with two fish-eye lenses, which are in a positional relationship separated by a certain distance from each other, are separated from an arbitrary point by a certain distance. At the photographing point, the object to be measured is photographed at a measuring point at a distance from the arbitrary point, and the two photographed images obtained from the positional relationship between the arbitrary point, the photographing point, and the measuring point are taken in the radial direction. By moving in the circumferential direction, the photographed image becomes a photographed image at coordinates equivalent to the coordinates of an arbitrary point, and this photographed image is evaluated to evaluate the shadow of the object at the arbitrary point. It is carried out from a remote location.

According to a second aspect of the present invention, there is provided a method for evaluating an object, a landscape, or the like at a measurement target point at an arbitrary point, wherein two fish-eye lenses mounted with one fisheye lens having a positional relationship separated by a certain distance from each other are mounted. Of the object to be measured at the specific target point at a certain distance from the arbitrary point by using the image pickup apparatus of the above or one image pickup apparatus equipped with two fish-eye lenses, and the arbitrary point, the image pickup point, and the target point By moving the two captured images in the radial direction and the circumferential direction from the relationship, the captured image is a captured image at coordinates equivalent to the coordinates of an arbitrary point. This is an evaluation method in which a landscape or the like is evaluated from a remote place by the same method as in claim 1.

In practice, for example, in the case where a target object such as a building is not installed at an arbitrary point, when evaluating the influence of a shade at an arbitrary point before installing the target object,
First, a point where one of the two fish-eye lenses is remote from an arbitrary point is set as a reference imaging point, a distance between the reference imaging point and a measurement target point where an uninstalled target object is located, and a distance between the reference imaging point and the arbitrary point. Find the distance to
The positional relationship between each point is clarified by obtaining the distance between the imaging point having the other fisheye lens, which is a certain distance from the reference imaging point, and the measurement target point, and the distance between the arbitrary point and the measurement target point.

For example, FIG. 1 is a schematic diagram illustrating the positional relationship between such points. In FIG. 1, for example, the distance between the reference photographing point (1) and the measurement target point (3) is represented by l, the distance between the reference photographing point (1) and the arbitrary point (4) is represented by L, and the photographing point (2). ) And the measurement target point (3) are represented by l ′, and the distance between the arbitrary point (4) and the measurement target point (3) is represented by l ″. Further, for example, two fish-eye lenses Distance between,
That is, the distance between the reference photographing point (1) and the photographing point (2) is represented by a.

Then, the photographed image is moved in the radial direction and the circumferential direction based on the values indicating the positional relationship between these points. This is performed, for example, as follows. First, using each value indicating the positional relationship of each point, for example, the coordinates of the measurement target point (3) in the polar coordinate system of the reference imaging point (1), the imaging point (2), and the arbitrary point (4) are respectively It is expressed as follows.

[0010]

(Equation 1)

[0011]

(Equation 2)

[0012]

(Equation 3)

Α, β, and θ represent angles from the center of the captured image, and γ, δ, and φ represent circumferential angles. Of these, θ represents the zenith angle, and φ represents the azimuth. Next, using these coordinates, for example, θ =
f (a, α, β, γ, δ) and φ = g (a, α, β,
γ, δ). The plane coordinates, for example,
(X ₁ , y ₁ , z ₁ ), (x ₂ , y ₂ , z ₂ ),
(X ₃ , y ₃ , z ₃ ).

The polar coordinates are represented by, for example, (l, α,
γ,), (l ′, β, δ), (l ″, θ, φ).
Also, for example, from the parallel movement type,

[0015]

(Equation 4)

It is assumed that Converting these equilibrium displacement equations into polar coordinates,

[0017]

(Equation 5)

## EQU1 ## Rearrange the above formula,

[0019]

(Equation 6)

Then, the distance 1 between the reference photographing point (1) and the measurement target point (3) is, for example, a _x ≠ 0 or
When a _z ≠ 0,

[0021]

(Equation 7)

Where a _x = a _z = 0,

[0023]

(Equation 8)

## EQU1 ## Further, the azimuth angle φ can be expressed by the following equation using the distance l, for example.

[0025]

(Equation 9)

The zenith angle θ can be expressed by the following equation using the azimuth angle φ, for example.

[0027]

(Equation 10)

As is apparent from these equations, the zenith angle θ
And the azimuth angle φ can be represented, for example, by polar coordinates of each point. That is, these expressions represent the coordinates when the captured image obtained by the two fish-eye lenses is moved in the radial direction and the circumferential direction, and at the same time, represent the coordinates equivalent to an arbitrary point.

Therefore, by moving the photographed image to the coordinates represented by the above formula, an image photographed at a remote place distant from an arbitrary point is equivalent to an image photographed at an arbitrary point. And so,
By evaluating the moved image, it is possible to evaluate the influence of the shadow of the target object at an arbitrary point from a remote place.

Hereinafter, embodiments will be described, and embodiments of the present invention will be described in more detail. Of course, the present invention is not limited by the following examples.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS By using the method for remotely evaluating a shadow according to the present invention, an object is photographed by a single photographing apparatus equipped with two fish-eye lenses at a remote place at a certain distance from an arbitrary point. FIG. 2 illustrates a configuration of the photographing apparatus used, and FIG. 2A is a front view thereof.
FIG. 2B is a top plan view thereof, and FIG. 2C is a cross-sectional view thereof. In FIG. 2, the two fish-eye lenses (1a) and (1b) are in a positional relationship separated from each other by a certain distance, and are fixed to a stable support (7) so that the positional relationship is not shifted. This support base (7) is installed on a stable support base foot (8) via a horizontal adjustment screw (3) and a rotating shaft (4). Its direction can be adjusted.
Also, the support (7) is equipped with a GPS (2),
The GPS (2) can measure the latitude / longitude position of the support (7). The fisheye lens (1
a) and (1b) are digital cameras (5a),
Provided in (5b), the photographed image is held as digital data. By being held as digital data, image processing and calculations can be performed by a computer, and various processes can be easily performed on the obtained captured image.

Using such a photographing apparatus, a target object at a measurement target point at a distance from an arbitrary point by a certain distance can be obtained.
An image was taken at an arbitrary point and an imaging point at a certain distance from the measurement target point. FIG. 3 illustrates a photograph of a photographed image at the obtained reference photographing point. Here, the reference shooting point is the position of the fisheye lens (1a).

Further, the photographed image shown in FIG. 3 was moved in the radial direction and the circumferential direction based on the positional relationship between the measurement target point and the photographing point. FIG. 4 illustrates an image when the photographed image is shifted by several meters from the reference. In this way, by evaluating the photographed images moved in the radial direction and the circumferential direction as illustrated in FIG. 4, the influence of the shadow by the target object at an arbitrary point can be easily evaluated from a remote place. Can be.

In this embodiment, the photographing device in which two fish-eye lenses are fixed to one support is used. However, for example, a photographing device in which one fish-eye lens is fixed to one support is used. Even when shooting using two cameras,
Similarly, it is clear that the influence of the shadow by the target object at an arbitrary point can be easily evaluated from a remote place.

For example, FIG. 5 exemplifies a configuration diagram of a photographing apparatus in which one fisheye lens is installed on one support base, FIG. 5A is a front view thereof, and FIG. Is a top plan view thereof, and FIG. 5C is a sectional view thereof. In FIG. 5, the fisheye lens (1) is installed on a support base via a translation mechanism that can arbitrarily translate its position. With this parallel movement mechanism, the parallel position of the fisheye lens (1) can be easily changed. The same effect as described above can be obtained even when shooting is performed using two shooting devices illustrated in FIG.

[0036]

As described above in detail, according to the method of the present invention, when an arbitrary point where an object to be measured exists is located on very difficult to reach or difficult to measure terrain, or in a building or the like, For example, when the measurement target object is not installed at an arbitrary point, the influence of a certain object at an arbitrary point on the periphery of the object, the landscape, and the like can be easily evaluated in a remote place.

[Brief description of the drawings]

FIG. 1 is a schematic diagram exemplifying a positional relationship among a reference photographing point, a photographing point, a measurement target point, and an arbitrary point.

FIGS. 2A and 2B are configuration diagrams illustrating a photographing apparatus equipped with two fish-eye lenses, wherein FIG. 2A is a front view, FIG. 2B is an upper plan view, and FIG.

FIG. 3 illustrates a photographed image in a remote place according to an embodiment of the present invention.

FIG. 4 illustrates an image obtained by moving a photographed image in a remote place, which is one embodiment of the present invention.

5A and 5B are configuration diagrams illustrating a photographing apparatus equipped with one fisheye lens, wherein FIG. 5A is a front view, FIG. 5B is an upper plan view, and FIG. 5C is a cross-sectional view.

[Explanation of symbols]

 1a, 1b Fish-eye lens 2 GPS 3 Horizontal adjustment screw 4 Rotary axis 5a, 5b Digital camera 6 Level 7 Support stand 8 Support stand 9 Moving mechanism

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yasuji Nogawa 2-34, Honjohigashi, Kita-ku, Osaka-shi, Osaka Kinden Co., Ltd. (56) References JP-A-5-346950 (JP, A) Kaihei 4-220592 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06T 1/00 G01W 1/12

Claims (2)

(57) [Claims] 1. A method for evaluating the influence of a shadow of an object at an arbitrary point on the periphery of an object in a remote place, comprising two fish-eye lenses mounted in a positional relationship separated by a certain distance from each other. The photographing device of the above or one photographing device equipped with two fish-eye lenses is used to photograph a measurement target object at a specific target point at a certain distance from an arbitrary point at a photographing point at a certain distance from the arbitrary point. From the positional relationship between the point, the photographing point, and the measurement target point, the obtained two photographed images are moved in the radial direction and the circumferential direction, so that the photographed image is a photographed image at coordinates equivalent to the coordinates of an arbitrary point, A method of evaluating a remote image of a shadow, wherein a sunshade and a reflected light by an object at an arbitrary point are obtained by superimposing sun trajectories. 2. A method for evaluating a certain object, a landscape, and the like at a measurement target point at an arbitrary point, comprising: two photographing apparatuses or fisheye lenses 2 each having one fisheye lens in a positional relationship separated by a certain distance from each other. A single imaging device equipped with a plurality of cameras captures an object to be measured at a specific target point at an imaging point at a certain distance from an arbitrary point, and obtains an image based on a relationship between the arbitrary point, the imaging point, and the measurement target point. A method for evaluating a remote location image, wherein the two captured images are moved in a radial direction and a circumferential direction so that the captured images are captured images at coordinates equivalent to the coordinates of an arbitrary point.