JP2002062188A - Sunlight evaluation method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new sunlight evaluation method and device for easily evaluating and grasping the shade and reflection light at an arbitrary point. SOLUTION: An evaluation image region to be evaluated is cut (s2) from a hemispherical image (s1) photographed at an evaluation point, a solar trace according to the latitude, longitude, azimuth angle, and oblique angle of the evaluation point is acquired (s3), the overlapped image of the solar trace and the evaluation image region is created (s4), and the shade of the solar trace is evaluated (s5) by an object around the evaluation point being present within the valuation image region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for evaluating sunlight. More specifically, the invention of this application relates to a new sunlight evaluation method and sunlight evaluation device that can easily evaluate and grasp the shade and reflected light at an arbitrary point.

[0002]

2. Description of the Related Art At an arbitrary point, when investigating how the sunlight irradiates the arbitrary point, not only the direct light from the sun but also the shadow of a building or the like existing in the vicinity. It is also necessary to evaluate the effect of reflected light on arbitrary points.

[0003] For example, when a solar cell is installed at an arbitrary point, in order to make sunlight as much as possible incident on the surface of the solar cell, the surface of the solar cell due to shading or reflected light from a building or the like present around the installation point. It is very important to assess the impact on

On the other hand, when an object is installed at an arbitrary point and the object is likely to reflect sunlight, the reflected light of the object to a building or the like existing around the installation point is disturbed. The effects need to be considered.

[0005] For example, when a solar cell is installed at an arbitrary point, the surface of the solar cell generally reflects the sunlight, and there is a concern that the reflected light may affect the surrounding area. For this reason, it is also important to evaluate the influence of the reflected light from the solar cell on the surroundings of the solar cell.

[0006] Conventionally, as a method of evaluating the shade and reflected light, a method of evaluating the influence of the shade or reflected light or the vicinity of an arbitrary point which is considered to be affected by the shade or reflected light is considered. A method is used to evaluate the influence from measured drawings of existing buildings and the like, and incident angles of sunlight on springs, summers, autumns, and winters to arbitrary point planes.

[0007]

However, in such a conventional evaluation method (hereinafter referred to as a sunlight evaluation method), the incident angle of sunlight on an arbitrary point plane can be measured by a dedicated computer. However, in order to obtain the relationship between the incident angle and peripheral objects such as buildings, it is necessary to write each peripheral object one by one in a drawing, and there is a problem that it takes a lot of trouble and time.

[0008] The invention of this application has been made in view of the above circumstances, and solves the problems of the prior art.
An object of the present invention is to provide a new sunlight evaluation method and a new sunlight evaluation method capable of easily evaluating and grasping a shade and reflected light at an arbitrary point.

[0009]

In order to solve the above problems, the invention of this application is to cut out an evaluation image area to be evaluated from a hemispherical image taken at an evaluation point, and to obtain the latitude, longitude and azimuth of the evaluation point. , Obtains the sun trajectory according to the inclination angle, creates a superimposed image of the sun trajectory and the evaluation image area, and evaluates the shadow by the object near the evaluation point existing in the evaluation image area from the superimposed image. A sunlight trajectory that overlaps with an object around an evaluation point in the superimposed image and deletes the remaining sun trajectory. The present invention also provides, as an aspect thereof, a method of symmetrically moving the image with respect to the center of the evaluation image area and evaluating reflected light of the sun trajectory at the evaluation point from a superimposed image thereafter (claim 2).

According to the invention of this application, in the above-described sunlight evaluation method, the evaluation image area is cut out with a size corresponding to the type of the taking lens of the hemispherical image (claim 3). Deletion of the sun trajectory overlapping with the evaluation point peripheral object is specified by specifying the boundary line between the sky and the evaluation point peripheral object in the evaluation image area, and setting the sky area and the peripheral object area that are distinguished by that boundary line, Performing by deleting the sun trajectory in the region (Claim 4), calculating the occupancy ratio of the sky region in the evaluation image region, and calculating the global solar radiation using the occupation ratio (Claim 4) 5)
Also, the occupation ratio of the sky region in the evaluation image region is calculated, the total solar radiation is calculated using the occupation ratio, the operating temperature of the solar cell is calculated using the total solar irradiation, and Calculating the amount of generated power using the amount of solar radiation and the operating temperature (claim 6) is also provided as a preferable embodiment thereof.

Further, the invention of this application is based on image cutting means for cutting out an evaluation image area to be evaluated from a hemispherical image taken at the evaluation point, and according to the latitude, longitude, azimuth and inclination of the evaluation point. A sun trajectory acquisition unit for acquiring a sun trajectory, and a superimposed image creating unit for creating a superimposed image of the sun trajectory by the sun trajectory acquisition unit and the evaluation image area by the image cutout unit; A sunlight evaluation device (Claim 7) is provided, wherein a shade due to an object around an arbitrary point existing in the evaluation image area can be evaluated from the superimposed image by the creating means. In the evaluation device, a sun trajectory deletion unit that deletes a sun trajectory that overlaps with an evaluation point surrounding object in the superimposed image, and a sun trajectory remaining after being deleted by the sun trajectory deletion unit is an evaluation image area. The reflected light of the sun trajectory at the evaluation point can be evaluated from a sun trajectory moving means for symmetrically moving with respect to the center and a superimposed image of the sun trajectory moved by the sun trajectory moving means after the target movement. 8)
Is also provided as an embodiment thereof.

According to the invention of the present application, in the above-described sunlight evaluation apparatus, the image extracting means can extract an area designated by manual input as an evaluation image area, or capture a hemispherical image. When the type of lens is selected, the evaluation image area can be automatically cut out with a size according to the selected type (claim 9). Area setting means for automatically setting the sky area and surrounding object area that are distinguished by the boundary when the boundary between the sky and the surrounding object at the evaluation point is specified, and deleting the sun trajectory in the surrounding object area A sky ratio calculating means for calculating a occupancy ratio of the sky area in the evaluation image area, and a total solar radiation amount using the occupancy ratio of the sky ratio calculation means. Solar radiation calculation means for calculating Further, an operating temperature calculating means for calculating the operating temperature of the solar cell using the global solar radiation amount by the global solar radiation calculating means, and power generation using the operating temperature by the global solar radiation amount and the operating temperature calculating means. It is also provided that a power generation amount calculating means for calculating the amount of power (claim 11) and (claim 12) is provided as a preferable embodiment thereof.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of the present application has the features as described above. Hereinafter, embodiments will be described with reference to the accompanying drawings, and the embodiments of the invention will be described in more detail. .

[0014]

[Embodiment 1] FIGS. 1 and 2 are flow charts each showing an example of a sunlight evaluation method according to the present invention.
FIG. 3 is a block diagram showing an example of the sunlight evaluation device of the present invention. 4 to 9 exemplify screen displays of a computer that executes the present invention. Hereinafter, FIG. 3 to FIG.
The present invention will be described with reference to FIG.

The sunlight evaluation method of the present invention is actually executed using a computer (a computer such as a general-purpose computer or a computer dedicated to evaluation). Further, the sunlight evaluation device further provided by the present invention can be realized, for example, in the form of software executable by a general-purpose computer, in the form of a computer dedicated to evaluation, or in the form of software (program) incorporated therein. Also,
Each image and data can be displayed on the screen by a computer display, printed and displayed by a printer, data storage by storage means, etc., and their input can be made by using existing input means (mouse, keyboard, etc.) for the computer. It goes without saying that it can be used.

<Step 1 (s1)> First, a point to be evaluated where solar cells and the like are installed (hereinafter, referred to as an evaluation point)
Obtain a hemispherical image at.

The hemispherical image may be photographed at each evaluation, or a previously photographed hemispherical image may be stored in a database for each evaluation point (for example, the installation point name is associated with each value). And a hemispherical image of the corresponding evaluation point may be read from the database. The photographing of a hemispherical image is performed, for example, by using a fisheye lens or F
This can be performed using an analog or digital camera equipped with an iskey. The photographing is performed, for example, with the photographing camera facing south and in a direction determined by a certain inclination angle.

This processing is executed by the hemispherical image acquisition means (1) in FIG. The hemispherical image acquiring means (1) is constructed so as to be able to acquire a hemispherical image inputted from the outside, or is constructed so as to be able to read out a hemispherical image from an external database means, or a database means. It can be built-in so that the hemispherical image can be read from the built-in database means.

<Step 2 (s2)> An evaluation image area to be evaluated is cut out from the hemispherical image of the evaluation point acquired as described above.

FIGS. 4A and 4B show examples of computer screen display when an evaluation image area is cut out from a hemispherical image. In the extraction of the evaluation image area, the area is specified in the hemispherical image on the screen by manual input, and the area is cut out as the evaluation image area, or the size to be cut out is automatically set depending on the type of shooting camera May be performed. In the latter case, for example, in the case of a photographing camera equipped with a fisheye lens, a portion surrounded by a dotted line in the hemispherical image as shown in FIG.
In the case of yes, a portion surrounded by a dotted line as shown in FIG. 4B is cut out as an evaluation image area.

This processing is executed by the image extracting means (2) in FIG. This image extracting means (2)
An area designated by manual input is constructed so as to be able to be cut out as an evaluation image area, or a cut-out area corresponding to the type of shooting camera is set in advance. It can be constructed so that the evaluation image area can be automatically cut out by size.

<Step 3 (s3)> A sun trajectory is obtained according to the latitude, longitude, azimuth, and inclination of the evaluation point where the hemispherical image was captured.

The latitude, longitude, azimuth, and inclination of the evaluation point are the latitude and longitude, respectively, at which the photographing camera is installed at the time of photographing the hemispherical image, and the azimuth and inclination of the photographing camera. For example, when a solar cell is installed at the evaluation point, the values are the same as the latitude and longitude at which the solar cell is installed, and the azimuth and inclination angle at which the solar cell faces. These values may be input at each evaluation, or the previously input values may be stored in a database for each evaluation point (for example, an installation point name and each value may be stored in association with each other). ), Each value of the corresponding evaluation point may be read from the database.

Then, the sun trajectory is automatically obtained from these values. This acquisition uses an existing program that can obtain the trajectory of the sun in four seasons, for example, spring / summer / autumn / winter (for example, spring equinox / autumn equinox or summer solstice / winter solstice) from latitude, longitude, azimuth, and inclination. This can be realized by: It is needless to say that the obtained sun trajectory is preferably a southward one at the evaluation point (= imaging point).

FIG. 5 shows the latitude, longitude, azimuth,
9 shows an example of an input screen for an inclination angle. This figure 5
In the input screen illustrated in Fig. 5, in addition to the values, the name of the evaluation point (indicated as the installation point name in the figure), the shooting date, and the area name (Fig. Medium, calculation area and calculation point are displayed.The calculation area is a wide area name, and the calculation point is a more detailed point name in the area.).

The sun trajectory acquisition process is executed by the sun trajectory acquisition means (3) in FIG. The sun trajectory acquisition means (3) receives the longitude, latitude,
An azimuth angle, an inclination angle, and a construction constructed so that angle values such as a shooting date can be obtained, or a construction constructed so that each value can be read from an external database means DB, or a built-in database means DB And built-in database means D
Each value is constructed so as to be readable from B, and a form in which the sun trajectory can be obtained using each value, for example, a form in which an acquisition program is executed, or a form of the acquisition program itself can be adopted.

<Step 4 (s4)> A superimposed image of the sun trajectory obtained as described above and the evaluation image area is created.

FIG. 6 shows an example of a screen displaying a superimposed image. In the screen illustrated in FIG. 6, in addition to the superimposed image, information such as an evaluation point name (displayed as an installation point name in the figure), a shooting date, a latitude, a longitude, an azimuth, and a tilt angle are also displayed. ing. In the present embodiment, the sun trajectory is March 21, 1999 (spring equinox day), June 22, 1999 (summer solstice day), September 18, 1999 (autumn equinox day), and December 21, 1999 (winter solstice day). The four seasons of the day) are superimposed on the evaluation image area.

This processing is executed by the superimposed image forming means (4) in FIG. The superimposed image creating means (4) is constructed so that the sun trajectory received from the sun trajectory acquisition means (3) can be superimposed on the evaluation image area received from the image extracting means (2), and is superimposed. An image is displayed.

<Step 5 (s5)> Then, from the superimposed image, the shade of the sun trajectory due to the surroundings of the evaluation point existing in the evaluation image area is evaluated.

More specifically, as is clear from FIG. 6, each of the sun trajectories includes objects existing around the evaluation point such as buildings and trees projected in the evaluation image area (= around the evaluation point). It can be seen that there is a portion that overlaps the object). This portion is a portion where the sunlight is blocked by the objects around the evaluation point, and means that the sun overlaps with the objects around the evaluation point to form a shade when viewed from the evaluation point. In other words, it is possible to grasp which evaluation point surrounding object becomes an obstacle to sunlight with respect to the evaluation point.

Therefore, for example, when a solar cell is installed, it means that the solar trajectory portion overlapping with the obstacle is not irradiated with the sunlight and no power is generated, and before the actual installation, the solar light is generated in advance. The irradiation status can be accurately grasped.

[Embodiment 2] Next, the evaluation of the reflected light of the sun trajectory according to the present invention will be described.

<Step 6 (s6)> First, in the superimposed image obtained as described above, the sun trajectory overlapping with the vicinity of the evaluation point is deleted.

More specifically, as shown in the flow chart of FIG. 2, for example, this sun trajectory is deleted by first designating a boundary between the sky and an object around the evaluation point in the evaluation image area. A sky region and a peripheral object region to be distinguished are set (s6.1). FIG. 7 shows an example of a screen when a boundary line is specified and an area is set. The dotted line in FIG. 7 is a boundary line, and the sky region and the peripheral object region are distinguished.
Here, the sky area refers to an area of the sky that is projected without being interrupted by an object around the evaluation point, and the peripheral object area refers to an area including only the object around the evaluation point. The specification of the boundary line can be performed by drawing a line on the screen using manual input means such as a mouse, for example. Alternatively, the boundary between the sky and the surroundings of the evaluation point may be automatically recognized, and the boundary may be automatically drawn.

Then, only the sun trajectory in the peripheral object area is deleted (s6.2). As can be seen from the screen displays of FIGS. 6 and 7, each of the sun trajectories in the four seasons has a portion included in the peripheral object area. Delete those parts.

This processing is executed by the sun trajectory deleting means (5) in FIG. The sun trajectory deleting means (5) is constructed so that the sky area and the peripheral object area which are distinguished by the designated boundary line can be automatically set. May be constructed so that a boundary line can be acquired from the image or a boundary can be automatically recognized and a boundary line can be automatically drawn. Also, regarding the deletion of the boundary line, for example, it is assumed that the part in the surrounding object area is deleted from the intersection of the boundary line and the sun trajectory, and the part in the sky area is left. be able to. In FIG. 3, the form of the sun trajectory deleting means (5) which performs such processing is illustrated as a form having an area setting means (51) and a trajectory deleting means (52).

<Step 7 (s7)> Next, the remaining sun trajectory is symmetrically moved with respect to the center of the evaluation image area.

FIG. 8 shows an example of a screen displaying the sun trajectory after the symmetrical movement. As shown in FIG. 8, the remaining sun trajectory, that is, the portion in the peripheral object area is deleted. The sun trajectory consisting of only the part existing in the sky area is moved point-symmetrically with respect to the center of the evaluation image area.

For example, regarding the sun trajectory in the summer (summer solstice), first looking at FIG. 6, the left end of the sun trajectory overlaps the roof part (eave tip) of the building in the upper left area in the evaluation image area. Referring to FIG. 7, this roof portion is defined as a peripheral object region by a boundary line with the sky.
For this reason, in FIG. 8, the left end portion of the sun trajectory overlapping the roof portion has been deleted. In FIG. 8, since the remaining sun trajectory is moved point-symmetrically with respect to the center of the region,
The deleted left end portion is moved to the lower right area in the evaluation image area (although it is not displayed because it has been deleted, of course).

The moving process here is executed by the sun trajectory moving means (6) in FIG. The sun trajectory moving means (6) is constructed so that the remaining sun trajectory can be moved point-symmetrically with respect to the center of the evaluation image area.

<Step (s8)> Then, the reflected light of the sun trajectory at the evaluation point is evaluated from the superimposed image after the movement of the sun trajectory.

More specifically, as is clear from FIG. 8, in each of the sun trajectories, a portion overlapping with the vicinity of the evaluation point projected in the evaluation image area is deleted.
The point has been moved symmetrically. The deleted portion is the same as the portion which becomes the shade of sunlight obtained as described above, and means that no reflected light of sunlight is generated when viewed from the evaluation point. That is, it is possible to grasp what kind of reflected light is generated at the evaluation point with respect to the sunlight of each season.

Therefore, for example, when a solar cell is installed, the state of reflection of sunlight by the light receiving surface of the solar cell can be easily and clearly grasped in advance.

[Third Embodiment] In the present invention, the total solar radiation, the operating temperature of the solar cell, and the generated power may be calculated from the occupation ratio of the sky region in the evaluation image region. .

<Step 9 (s9)> More specifically,
For example, as illustrated in FIG.
The ratio of the sky area set in 6.1 in the evaluation image area is calculated.

On the screen illustrated in FIG. 7, the occupation ratio of the sky region, which is distinguished from the surrounding object region by the boundary line in the diagram, is displayed as a ratio (%). On the screen illustrated in FIG. 5, the sky opening ratio (%) is displayed. FIG. 5 shows the input screen of the calculation conditions of the sun trajectory as described above. However, when the hemispherical image and the calculation conditions stored in advance are read from the database, the occupation ratios are always the same. It is displayed. In the present embodiment, the occupation ratio of the sky area (also referred to as the sky rate) is about 6
It is 3.443466%.

This processing is executed by the sky factor calculation means (7) in FIG. This sky factor calculation means (7)
May be constructed such that the area of the area inside the boundary line is calculated and the ratio of the area in the entire area of the evaluation image area can be calculated.

<Step 10 (s10) and Step 11
(S11) Step 12 (s12)> Subsequently, the total amount of solar radiation is calculated using the calculated occupation ratio of the sky region,
Further, the operating temperature of the solar cell is calculated using the total solar radiation, and further, the generated power amount is calculated using the total solar radiation and the operating temperature.

The calculation of the global solar radiation, the operating temperature, and the amount of generated power can be performed by applying an existing calculation method. For example, as an example, there is a conventional method of calculating the global solar radiation amount, the operating temperature, and the generated power amount using the sky solid angle (see Japanese Patent No. 2972596). In this case, instead of the sky solid angle, the sky region is used. Both numerical values can be calculated by using the occupation ratio of. The calculation of the amount of generated electric power requires weather information and power generation equipment information. It is preferable that these various kinds of information be stored in a database in advance and be readable from the database at any time.

In FIG. 3, the numerical values are calculated from the sky ratio calculation means (7) by the sky ratio (= occupation ratio of the sky region).
, An operating temperature calculating means (9) for receiving the global solar radiation from the global solar radiation calculating means (8), and a global solar radiation calculating means (8) for receiving the global solar radiation from the global solar radiation calculating means (8). The amount of insolation is executed by the generated power amount calculating means (10) which receives the operating temperature from the operating temperature calculating means (9). The power generation amount calculation means (10) is constructed such that weather information and power generation equipment information can be obtained from the outside, or constructed so that various information can be read from an external database means DB, or a database means DB. It is built-in and constructed so that various information can be read from the built-in database means. For example, it can be in the form of executing a calculation program or in the form of a calculation program itself.

Of course, the present invention is not limited to the above examples, and various embodiments can be made in detail.

[0053]

As described in detail above, the invention of this application is a new sunlight evaluation method and sunlight evaluation apparatus which can easily and objectively evaluate and grasp the influence of shade and reflected light at an arbitrary point. For example, in the case of installing a solar cell at an arbitrary point, the state of irradiation of sunlight to the solar cell (shadow state) before actual construction
In addition, it is possible to accurately grasp the reflection state and to predict the amount of generated power.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an example of a sunlight evaluation method according to the present invention.

FIG. 2 is a flowchart illustrating an example of a sunlight evaluation method according to the present invention.

FIG. 3 is a block diagram showing an example of the sunlight evaluation device of the present invention.

FIGS. 4 (a) and 4 (b) are screen hard copies in place of the drawings, each showing an example of a screen display of a computer executing the present invention.

FIG. 5 is a screen hard copy instead of a drawing showing another example of a screen display of a computer that executes the present invention.

FIG. 6 is a screen hard copy instead of a drawing showing another example of a screen display of a computer executing the present invention.

FIG. 7 is a screen hard copy instead of a drawing showing another example of a screen display of a computer that executes the present invention.

FIG. 8 is a screen hard copy instead of a drawing showing another example of a screen display of a computer that executes the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hemispheric image acquisition means 2 image extraction means 3 sun trajectory acquisition means 4 superimposed image creation means 5 sun trajectory deletion means 51 area setting means 52 deletion means 6 sun trajectory movement means 7 sky factor calculation means 8 total solar radiation calculation Means 9 Operating temperature calculating means 10 Generated power amount calculating means

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuji Nogawa 2-34 Honjo Higashi, Kita-ku, Osaka-shi, Osaka Kinden Co., Ltd. F-term (reference) 2G065 AA11 AA15 AB30 BA04 BA34 BA40 BB06 BC11 BD02 BD03 BD08 DA07 DA20

Claims (12)

[Claims] 1. An evaluation image area to be evaluated is cut out from a hemispherical image taken at an evaluation point, and a sun trajectory according to the latitude, longitude, azimuth, and inclination of the evaluation point is acquired. A sunlight evaluation method comprising: creating an image superimposed on an image area; and evaluating, from the superimposed image, a shadow caused by an object near an evaluation point existing in the evaluation image area. 2. The method according to claim 1, wherein a sun trajectory overlapping with the vicinity of the evaluation point in the superimposed image is deleted, and the remaining sun trajectory is symmetrically moved with respect to a center of an evaluation image area. The sunlight evaluation method according to claim 1, wherein the reflected light of the sun track at the point is evaluated. 3. The sunlight evaluation method according to claim 1, wherein the cutting out of the evaluation image area is performed with a size according to the type of the taking lens of the hemispherical image. 4. Deletion of a sun trajectory overlapping an evaluation point peripheral object in a superimposed image is performed by designating a boundary line between the sky and an evaluation point peripheral object in an evaluation image area by a sky region distinguished by the boundary line. The sunlight evaluation method according to claim 2, wherein the method is performed by setting a peripheral object region and deleting a sun trace in the peripheral object region. 5. The sunlight evaluation method according to claim 4, wherein the occupation ratio of the sky region in the evaluation image region is calculated, and the total solar radiation is calculated using the occupation ratio. 6. An occupation ratio of the sky region in the evaluation image region is calculated, a global solar radiation amount is calculated using the occupation ratio, and an operating temperature of the solar cell is calculated using the global solar irradiation amount. ,
The sunlight evaluation method according to claim 4, wherein the amount of generated power is calculated using the global solar radiation and the operating temperature. 7. An image cutting means for cutting out an evaluation image area to be evaluated from a hemispherical image taken at an evaluation point, and a sun for acquiring a sun trajectory according to the latitude, longitude, azimuth, and inclination of the evaluation point. Trajectory acquisition means, and superimposed image creation means for creating a superimposed image of the sun trajectory by the sun trajectory acquisition means and the evaluation image area by the image cutout means, and a superimposed image by the superimposed image creation means A sunshine evaluation device which is capable of evaluating a shadow caused by an object around an arbitrary point existing in an evaluation image area. 8. A sun trajectory deleting means for deleting a sun trajectory overlapping with an object around an evaluation point in the superimposed image, and a sun trajectory remaining after being deleted by the sun trajectory deleting means is symmetrical with respect to a center of an evaluation image area. 8. The sunlight evaluation device according to claim 7, wherein the reflected light of the sun trajectory at the evaluation point can be evaluated from a sun trajectory moving means to be moved and a superimposed image of the sun trajectory moved by the sun trajectory moving means after the target movement. 9. The image extracting means is capable of extracting an area designated by manual input as an evaluation image area.
8. The sunlight evaluation method according to claim 7, wherein, when a type of a photographic lens of a hemispherical image is selected, an evaluation image area can be automatically cut out with a size according to the selected type. 10. A sun trajectory deleting means automatically sets a sky region and a peripheral object region distinguished by the boundary line when a boundary line between the sky and an evaluation point peripheral object is designated in the evaluation image region. The sunlight evaluation method according to claim 8, further comprising: an area setting unit configured to delete the sun trajectory in the surrounding object area. 11. An sky ratio calculating means for calculating an occupancy ratio of a sky area in an evaluation image area, and a global solar radiation amount calculating means for calculating a global solar radiation amount using the occupancy ratio by the sky ratio calculating means. The sunlight evaluation method according to claim 10. 12. A sky factor calculating means for calculating an occupancy ratio of a sky area in an evaluation image area, a global solar irradiance calculating means for calculating a global solar irradiance using the occupancy ratio by the sky factor calculating means, Operating temperature calculating means for calculating the operating temperature of the solar cell using the total solar radiation by the solar radiation calculating means,
The sunlight evaluation method according to claim 10, further comprising: a generated power amount calculation unit configured to calculate the generated power amount using the global solar radiation amount and the operating temperature by the operating temperature calculation unit.