KR102650577B1 - Aerial photography system that improves the clarity of images of terrain features - Google Patents

Abstract

The present invention relates to an aerial photography system that improves the clarity of images of terrain features. More specifically, in an aerial photography system that processes digital aerial images, the processing module is reliably and effectively cooled. The clarity of the feature image has been improved to prevent deterioration and strengthen the shock absorption and buffering function for external vibration of the image processor to prevent errors or defects during image processing in advance and improve the clarity of the feature image. It is about an improved aerial photography system.

Description

Aerial photography system that improves the clarity of images of terrain features}

The present invention relates to an aerial photography system that improves the clarity of images of terrain features in the field of aerial photography technology. More specifically, when aerial photography is performed using an aircraft (aircraft), the present invention absorbs and cushions vibrations and shocks from inside and outside the aircraft. By strengthening the function, it prevents errors or defects in securing video images in aerial photography in advance, improves the image clarity of aerially photographed ground features, and provides a vibration-free environment inside the aircraft in an aerial photography system that digitally processes aerially photographed video images. The clarity of the aerial image is improved by processing, and the circuit module that processes the aerial image signal is cooled to operate at a stable temperature to prevent deterioration of the circuit module and extend its lifespan. It is about an aerial photography system.

When taking aerial photos for map production, the operation route or flight path of the aircraft with the camera installed is set in advance, and video images are acquired by aerial photography of the ground or terrain of the target area while operating along the set flight path ( securing) is a recent general trend.

These aerial images are acquired by installing a camera on an aircraft (aircraft) to photograph the ground surface, so changes in the height of the ground surface cannot be confirmed, and they are affected by pressure changes within the aircraft due to changes in flight altitude according to the operation of the aircraft. A malfunction may occur in the camera.

In particular, if a camera mounted on an aircraft in operation breaks down, not only is it impossible to capture and secure aerial images of the ground surface, but there is also the problem of significant financial and time losses.

A conventional technology that partially solves this problem is a technology that uses an aircraft camera protective cover to isolate the camera from the outside and place it under the influence of a certain atmospheric pressure.

However, even in the improved prior art, there is still a problem that the protective cover is damaged when the difference between the internal pressure (air pressure) and the external pressure of the protective cover is greater than a certain allowable ratio.

Therefore, there is a need to develop technology to stably capture aerial images of the ground surface using cameras in aircraft.

As a prior technology that partially solved the need for such prior technology, Republic of Korea Patent No. 10-1219156 (2012.12.31.) 'Aerial photography system for compositing high-resolution aerial photography images through serial code input' was disclosed.

Meanwhile, in the digital age, when taking high-resolution digital aerial photos, the photographer sets the flight route of the aircraft in advance, attaches a camera to the aircraft, and takes photos of the desired target area while flying. At this time, there are cases where multiple aircraft take high-precision aerial photography of a specific assigned area at the same time, and the aerial images taken by multiple aircraft with high precision must be composited in high-precision.

Since aerial video images are taken from an aircraft (aircraft) flying at a certain altitude above the ground, except for ground objects located in the vertical direction of the aircraft, other ground objects adjacent to them must be photographed including the sides, especially aircraft. The reality is that precise aerial photography is difficult due to shock and vibration applied from inside or outside.

Meanwhile, in order to create a map, as described above, it is necessary to connect multiple aerial images together, and in this process, aerial images taken at different locations are partially applied.

A conventional technology that partially solves these problems and needs is the 'multi-angle shooting aerial camera device' under Korean Patent Registration No. 10-0982353 (September 8, 2010).

Figure 1 is a functional configuration diagram of an aerial photography system that improves the clarity of images of terrain features according to an embodiment of the prior art.

Hereinafter, the prior art will be described in detail with reference to the attached drawings, including a vertical camera module 10a that takes pictures in a vertical direction on the frame 20 on a mount 1 installed on an aircraft, and a camera module 10a that takes pictures in four different oblique directions. The first to fourth inclined camera modules ((10b, 10c, 10d, 10e) are respectively provided with corresponding guide protrusions (11) on the center frame (20a) and the first to fourth side frames (20b, 20c, 20d, 20e). Bolts are fastened and fixed using the engaging portion (13), fixing hole, and bolt hole.

The aerial photography system according to the prior art has the advantage of securing high-clearance aerial photography images by aerial photography of the ground or terrain from various angles, but reduces shock and vibration caused by internal and external influences of the aircraft (aircraft). It is confirmed that there is a limit to increasing clarity because the required composition has not been prepared.

In addition, since it is not possible to remove a large amount of heat generated when recording, storing, or processing aerial images, the problem of deterioration of the circuit module and shortening of its lifespan has not yet been resolved.

Therefore, users of maps created using conventional technology have difficulty interpreting maps for unfamiliar areas, which makes them feel inconvenienced in using maps, and in the process of processing huge big data such as aerial footage in a short period of time, the processing module The reality is that they easily deteriorate, causing problems such as errors and defects, shortening the life cycle, and lowering operating efficiency.

Therefore, when shooting video images from an aircraft, shocks and vibrations generated inside and outside the aircraft are eliminated to secure precise aerial video images with high clarity, and deterioration of the circuit module is prevented during processing, preventing processing errors and defects from occurring. There is a need to develop technologies that reduce the risk and extend its lifespan.

Republic of Korea Patent Registration No. 10-0982353 (2010. 09. 08.) ‘Multi-angle shooting aerial camera device’ Republic of Korea Patent Registration No. 10-1219156 (2012.12.31.) ‘Aerial photography system for compositing high-resolution aerial photography images through serial code input’ Republic of Korea Patent Registration No. 10-2347352 (2021.12.31.) ‘Aerial photography system that updates real-time video data’

The present invention was created to solve the problems in the prior art in consideration of the above-mentioned problems in the prior art, and is designed to stably and effectively cool the processing module mounted on the image processor in an aerial photography system that processes digital aerial images. The clarity of the feature image has been improved to prevent deterioration and strengthen the shock absorption and buffering function for external vibration of the image processor to prevent errors or defects during image processing in advance and improve the clarity of the feature image. The main purpose is to provide an improved aerial photography system.

The present invention is a means for achieving the above object, and includes a camera 200 installed on an aircraft 100; First and second detection sensors (300,310) installed on the aircraft (100) to detect an object (B) that interferes with photography moving below the camera (200); A touch screen panel 400 installed on the aircraft 100 to input control signals for controlling the control unit 500 and to display output contents according to the input control signals; It is installed on the aircraft 100, and when the aircraft 100 reaches the aerial photography area while the aircraft 100 is in operation, the aerial photography area is photographed through the camera 200, and objects that interfere with filming are detected by the detection sensor 300 during filming. When a signal is received, the relevant aerial photography area is designated as a re-photography area, and when a control signal to reset the shortest aerial route of the re-photography area is input from the touch screen panel 400, the shortest aerial path to the re-photography area is set, Ground reference coordinates are transmitted through communication with the control unit 500 and the aircraft 100, which transmits the captured aerial image to the image processor 800 of the ground center, and these ground reference coordinates and the position coordinates of the aircraft 100 are combined. In an aerial photography system that improves the clarity of images of terrain features, including a ground reference point (900) that guides the user to set a processing reference point for the captured image by comparison;

The image processor 800 includes a housing 1302 on which a plurality of processing modules (M) are mounted. A door 1304 is installed on the front of the housing 1302, and a housing is installed on the rear of the housing 1302. (1302) A cooling unit 300 is installed to directly cool the inside, a temperature detection sensor 1306 is installed on the inner ceiling of the housing 1302, and a temperature detection sensor 1306 is installed on the front upper side of the housing 1302. It includes a controller 1308 that controls the operation of the cooling unit (C) according to the temperature value detected by the detection sensor 1306;

A plurality of through holes are formed in the rear of the housing 1302, and the through holes are composed of a discharge hole 1310 at the bottom and supply holes 1320 other than the discharge hole 1310, and are supplied from the cooling unit (C). The dry cooling air is supplied into the housing 1302 through the supply hole 1320 and discharged to the outside of the housing 1302 through the discharge hole 1310;

A buffering means 1400 is further installed on the lower surface of the housing 1302, and the buffering means 1400 includes an upper plate 1410 fixed to the lower surface of the housing 1302 and a lower plate seated on the bottom surface. (1420), a downward convex portion 1440 convex downward from the center of the upper plate 1410, an upward convex portion 1450 convex upward from the central portion of the lower plate 1420, and the upper plate It includes a damper 1430 that cushions both ends of the 1410 and the lower plate 1420 by binding them up and down;

The dry cooling air is generated in the dry cold air generator 1340 and supplied to the supply/exhaust cylinder 1330 constituting the cooling unit (C). A replaceable filter is further installed, and the filter consists of a filter frame (11) and a filter body (12) mounted inside the filter frame (11), and the filter frame (11) is molded from PVC. An aerial photography system that improves the clarity of images of geographical features is provided, wherein the surface of the filter frame 11 is coated with an antistatic agent.

At this time, the downward convex part 1440 and the upward convex part 1450, which constitute the buffer means 1400, are designed to maintain a certain gap without touching each other;

The cooling unit (C) includes check valves (1312, 1322) installed in the discharge hole (1310) and supply hole (1320), and a supply and exhaust pipe (1330) connected to the discharge hole (1310) and supply hole (1320). and a dry cold air generator (1340) connected to and installed at the top of the supply and exhaust cylinder (1330); The air supply and exhaust pipe 1330 is divided into an air supply part 1332 and an exhaust part 1334, and a right-angled triangular block 1350 that narrows the air supply path toward the bottom is fixed inside the air supply part 1332. ;

The dry cold air generator 1340 includes a cylindrical main case 1341 and a case cover 1342 that seals the open upper part of the main case 1341;

A cylindrical first separation wall 1343 is formed inside the main body case 1341, and a second separation wall 1344 is formed inside the first separation wall 1343 to have a space, and the most An air supply fan 1345 is installed in the inner space to suck in air from the upper part and powerfully discharge it to the lower part, and the main body case 1341 has a plurality of first intake holes at more than half the upper and lower width along the circumferential direction. (1346) is formed, and a plurality of second intake holes 1347 are formed at positions less than half of the upper and lower width in the first separation wall 1343, and half of the upper and lower width are formed in the second separation wall 1344. A plurality of third intake holes 1348 are formed at the above positions, and a dehumidifier 1349 is disposed in the space between the first and second separation walls 1343 and 1344.

According to the present invention, in an aerial photography system that processes digital aerial images, the processing module mounted on the image processor is stably and effectively cooled to prevent deterioration of the processing module, and has a shock absorbing and buffering function against external vibration of the image processor. By strengthening this, an improved effect can be obtained to improve the clarity of the image of a feature by preventing errors or defects during image processing in advance.

Figure 1 is a functional configuration diagram of an aerial photography system that improves the clarity of images of terrain features according to an embodiment of the prior art.
Figure 2 is a diagram showing an aircraft, a camera, and a detection sensor to explain the aerial photography system according to the present invention.
Figure 3 is a block diagram showing the connection relationship between components according to the present invention.
Figures 4 to 6 are operational diagrams showing the aerial photography system according to the present invention.
Figure 7 is a block diagram showing the image processor that constitutes the aerial photography system according to the present invention.
Figure 8 is a diagram showing an aerial photography image to which the image processor constituting the aerial photography system according to the present invention is applied.
Figure 9 is a diagram showing the aerial image of Figure 8 being colored by the coloring module according to the present invention.
Figure 10 is a flow chart sequentially showing the image processing method of the aerial photography system according to the present invention.
Figure 11 is a diagram schematically showing aerial photography for application of the image processing method of the aerial photography system according to the present invention.
Figure 12 is a diagram showing a ground object corrected according to the image processing method of the aerial photography system according to the present invention.
Figure 13 is an image showing a vertical aerial photography image corrected according to the image processing method of the aerial photography system according to the present invention.
Figure 14 is an exemplary diagram showing an example of installation of the housing and cooling unit of the image processor that constitutes the aerial photography system according to the present invention.
Figure 15 is an exemplary diagram of a tray for mounting a processing module in a housing according to the present invention.
Figure 16 is an exemplary diagram of a dry cold air generator supplying dry cold air to the cooling unit of Figure 14.
Figure 17 is an exemplary diagram showing a buffer means of an image processor constituting an aerial photography system according to the present invention.
Figure 18 is an example of a filter replaceably installed on the pipe between the dry cold air generator of Figure 14 and the cooling unit.

Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

As shown in Figures 2 and 3, the aerial photography system according to the present invention includes a camera 200 installed on an aircraft 100; First and second detection sensors (300,310) installed in the aircraft (100); A touch screen panel 400 installed on the aircraft 100; A control unit 500 equipped with a wireless communication module installed on the aircraft 100 to transmit aerial images to the image processor 800 at the ground center; and a ground reference point 900 that communicates with the aircraft 100 to transmit ground reference coordinates and guides the user to set a processing reference point for the captured image by comparing the ground reference coordinates with the position coordinates of the aircraft 100.

At this time, the aircraft 100 is equipped with a main body 110 and a support 120 installed at the lower part of the main body 110.

In addition, the camera 200 is a typical camera used for aerial photography and is installed at the lower part of the main body 110.

In addition, among the first and second detection sensors 300 and 310, the first detection sensor 300 is installed on the lower surface of the tip of the aircraft 100 to detect an interference object, that is, an object B that interferes with filming, and the second sensor 300 The detection sensor 310 is installed on the camera base (not shown) of the camera 200 to detect an object (B) that interferes with photography existing directly below the camera 200. An ultrasonic sensor or an infrared sensor is used. .

In addition, a laser oscillator 320 and a sound wave emitter 330 are further installed at a distance from the first detection sensor 300. If the first detection sensor 300 detects an object B that interferes with photography, In this case, the laser oscillator 320 and the sound wave emitter 330 operate simultaneously according to the control signal from the control unit 500 and oscillate laser and sound waves directly downward toward the ground, thereby scattering the photography-obstructing object (B), such as a flock of birds. This prevents the camera 200 from moving downward. Nevertheless, if the second detection sensor 310 detects an object B that interferes with filming, filming at that point is stopped and the camera 200 is not moved downward. Even if the shooting information is saved, it is configured to improve the accuracy of the shooting information by moving again and reshooting rather than landing after the entire shooting is completed.

Additionally, the touch screen panel 400 has a touch screen function and is controlled by the control unit 500.

At this time, the touch screen panel 400 includes an input menu for inputting a control signal to the control unit 500 and an output menu for displaying output content according to the control signal.

The control unit 500 receives the shooting area to be captured and the flight path according to the shooting area by a separate terminal device, and causes the aircraft 100 to move along the flight path, and the camera 200 and the first and second sensors The operation of the sensors 300 and 310 is controlled, and each menu of the touch screen panel 420 is controlled.

At this time, the control unit 500 may receive input of the shooting area and flight route through the touch screen 400.

In addition, when the control unit 500 receives a detection signal from the second detection sensor 320, as described above, the control unit 500 confirms the shooting position at the time the detection signal was received and designates it as a re-photography area.

In addition, when the rephotography route setting signal is input from the touch screen panel 400, the control unit 500 sets the shortest air route to the area set as the rephotography area and displays it on the touch screen panel 400.

Meanwhile, since it is already a known fact that the control unit 500 sets the air route, detailed description will be omitted.

In addition, the aircraft 100 also includes a GPS sensor 600, which receives location information from a GPS satellite 700 and is controlled by a control unit 500.

In addition, the GPS satellite 700 is a common device that provides location information to the GPS sensor 600, and detailed description will be omitted.

Figures 4 to 6 are diagrams showing the operation of the aerial photography system according to the present invention. The operator sets the target area for aerial photography to the control unit 500 through a separate terminal device as a filming area, and places Set the air route accordingly.

Once the filming area and air route are set as described above, the operator takes off the aircraft 100 and operates the aircraft 100 along the air route.

When the control unit 500 receives location information about the shooting area from the GPS sensor 600 while the aircraft 100 is in operation, the control unit 500 detects the camera 200 and the first and second detection sensors 300 and 310. operates.

At this time, as shown in FIG. 5, when an object B, such as a bird, enters the shooting angle of the camera 200 while photographing the shooting area of the camera 200, the second detection sensor 310 detects the obstruction object (B). B) is detected and a detection signal is output to the control unit 500.

Meanwhile, when the target area is being photographed by the camera 200, if an object B, such as a bird, passes within the shooting angle of the camera 200, the object B is displayed in the aerial photographing image of the camera 200. (B) is displayed, making it impossible to capture accurate aerial images.

Therefore, the control unit 500, which receives the detection signal from the second detection sensor 310, checks the longitude and latitude of the point where the detection signal was received and designates the area as the re-photography point.

However, this process is performed only when it is not free from the structure that can avoid the object B that interferes with the filming of the camera 200, which will be described below.

The worker who has completed all filming of the shooting area through the aerial photography process described above touches the rephotography route setting menu 420 on the touch screen panel 400 to rephotograph the point designated as the rephotography point.

At this time, the control unit 500 sets the shortest air route to each retake point (RP), and displays the retake flight route (AL) and the retake point (RP) in the map menu 410 as shown in FIG. 6. It appears in

Afterwards, the aircraft 100 moves along the reset flight path, and when the aircraft 100 arrives at the rephotograph point (RP), the control unit 500 operates the camera 200 to point to the rephotograph point (RP). ) is retaken.

The aerial images captured in this way are transmitted to an image processor as shown in FIG. 7 under the control of the control unit 500, and are edited and processed by this image processor installed at the ground center.

As shown in FIGS. 7 to 13, the image processor 800 according to the present invention includes a housing 1302 (see FIG. 14) and a plurality of processing modules (M, FIG. 14) mounted on the housing 1302 in the form of a server rack. (see reference); The processing modules (M) include an image DB (1) that stores aerial photography image data of various regions, a link information DB (1') that stores link information related to ground objects, and a specific aerial photography function in the image DB (1). An image search module (2) that searches image data, an output module (3) that reads and outputs the searched aerial image data, and a ground object that needs to be modified by selecting a specific point in the aerial image output by the output module (3). A point selection module 4 that sets search standards for images, an image search module 5 that searches for a modified ground object image (20a; see Figure 12(a)) according to the search standards, and a modified modified ground object. An image editing module (6) that synthesizes and updates the image (20a'; see Figure 12(b)) by applying it to existing aerial image data, and an image drawing module (6) that modifies the modified ground object image (20a) that needs to be modified. 7) It consists of:

In addition, the image processor according to the present invention further includes a coloring module (8) that checks the color of the ground object image included in the aerial image on a pixel basis and unifies the pixels within a certain range by adjusting them to a common color. .

In addition, it further includes an identification code link module (9) that links related information stored in the link information DB (1') to the modified ground object image (20a), allowing the user to easily obtain related information when using the digital map. do.

[0024] The image DB (1) for storing data, the link information DB (1'), and the image search module (2) for searching specific data in the image DB (1), the composition and structure of which are known and shared. Since this is a common technique, its description is omitted here. For reference, the link information DB (1') stores various link information about ground objects. When the user selects a random ground object image among the aerial images in the form of a digital map being output by the output module (3), the link information DB (1') stores various link information about ground objects. , output by the identification code link module (9).

Here, the identification code link module 9 processes the output of link information, and when a ground object image is selected by the user, it outputs a separate window with link information posted or runs a web browser to access the related website. You can do it.

This is explained in detail below.

The output module (3) outputs the data searched by the image search module (2) on a public and public touch screen (3a) with a screen input function. In the present invention, the data is an aerial photography image, and the output module (3) is a known, public module for outputting aerial photography images through the touch screen (3a). Of course, the output module 3 has the function of checking the point where the user touched the touch screen 3a and inputting the relevant information. For reference, the output module (3) can check image data and output it as an image, such as 'Photoshop (a raster graphic editor developed by Adobe Systems)' and 'Paint', a graphic editor for Windows, Microsoft's representative operating system. It will be a typical program.

The point selection module 4 sets a standard for the image processor according to the present invention to search for the modified ground object image 20a in the aerial photographed image, and the standard for search is the road image included in the aerial photographed image ( 30) can be.

To explain this in more detail, a road paved with uniformly colored aggregate, such as asphalt, is located in the area adjacent to the reference ground object (10; see Figure 11) and the modified ground object (20; see Figure 11). Since this road is very close to the reference ground object 10 or the modified ground object 20, the side part of the modified ground object 20 is photographed and the modified ground object image 20a, which shows an appearance inclined toward the road, is the road. It has no choice but to occupy the edge of the image 30.

The image processor according to the present invention applies these characteristics, and the point selection module 4 selects a pair of initial points (P1) and a pair of end points (P2) designated by the user through the touch screen (3a). As a standard, the image within the range is confirmed as the road image (30). In other words, the point selection module 4 checks each coordinate value of the initial point (P1) and the end point (P2) selected by the user and connects them to a reference straight line, and the reference straight line formed in this way becomes the boundary of the road and creates a road image ( The scope of 30) is confirmed.

The image search module 5 checks the color of the road image 30, the range and boundaries of which are determined by the point selection module 4, and then checks the designated color of the pixel corresponding to the edge of the road image 30. , Compare it with the color of the road image (30) and check whether it matches.

To explain this in more detail, the image search module 5 checks the designated color of the pixel corresponding to the previously set reference straight line, compares the confirmed color with the color of the road image 30, and determines whether the road is of a certain length or longer. If a section (T) of pixels that do not match the color of the image 30 but are designated as the same color is confirmed, the section (T) is considered to be where the corrected ground object image 20a is located and is set as a target for correction.

Of course, even if the section T is not confirmed because the designated color of the pixel corresponding to the modified ground object image 20a matches the designated color of the pixel corresponding to the road image 30, the designated color of the surrounding pixels of the reference straight line In addition, if the same or similar color as the color of the road image 30 is continuously confirmed in pixels located at a certain distance or more from the reference straight line, this is regarded as a modified ground object image 20a and set as a target for correction. .

Meanwhile, as described above, the image search module 5 individually checks the designated colors of the pixels constituting the aerial photography image, compares the confirmed contents with the reference straight line, and determines the modified ground object image 20a. In other words, the image search module 5 determines the designated color of a pixel, compares the confirmed designated color with the designated color of other neighboring pixels, and finds the boundary by selecting the modified ground object image 20a from the aerial photographed image. It becomes an important criterion in deciding.

However, since the aerial image is a photograph of an actual crystal ground object 20, the pixels constituting the aerial image are not designated with the same color. In other words, the rooftop (plane) of the crystal ground object 20 that is photographed has various shapes, various types of facilities (helicopter landing pad, various antennas, water tank facilities, etc.) are installed, and shadows are formed in various directions. , In the modified ground object image 20a included in the aerial photographed image, the corresponding pixels are each designated in various colors even within the range.

In the end, the image search module 5 must check the aerial photography image with various colors assigned to each pixel, distinguish the independent retouched ground object images 20a, and distinguish the independent retouched ground object images 20a from neighboring ones. Since it was necessary to analyze how it overlaps or interferes with other ground object images or road images (30), a problem occurred in which the load on the system required for the operation of the image search module (5) increased excessively.

The user must also check whether the search results of the image search module (5) are correct by checking the aerial image displayed on the touch screen (3a) of the output module (3). Numerous ground object images included in the aerial image are Because they have similar shapes and colors, it is not easy to clearly distinguish between ground images and road images 30 visually.

To solve this problem, the image processor according to the present invention further includes a coloring module (8).

The coloring module 8 clearly distinguishes the ground object images included in the aerial photography image into various colors, allowing the image search module 5 as well as the user to easily visually distinguish the ground object images.

To this end, the coloring module 80 checks each pixel of the aerial photography image, searches for pixels designated with the same or similar colors and arranged so as to have continuity, and then connects them in a row to form a boundary line. Here, the continuity means that pixels designated with the same or similar colors are immediately adjacent to each other, as well as pixels designated with the same or similar colors are within a certain interval range. In other words, if pixels designated with the same or similar colors are arranged in a row within a certain interval, they are connected to form a border.

On the other hand, if the boundary lines formed in this way are not connected in a line to form a closed section of a certain range, but are cut off at one or both ends, the boundary line is not a boundary of the ground object image, and the color of the pixel is set as the background color. Because it is designated by color, it is considered not an image of a terrestrial object.

For reference, since the building is constructed with the same aggregate, the edges of the ground image taken of the building will be clearly distinguished with the same color, and the boundary line will be formed along this edge.

When the borderline is determined by the coloring module 8, the designated color of the pixels in the closed section of the borderline is ignored and they are designated as the same color. At this time, in order to make visual distinction from other neighboring ground object images clearer, the coloring module 8 ensures that the colors applied to other neighboring ground object images contrast with each other.

Subsequently, the image drawing module 7 modifies the set modified ground object image 20a, and the image editing module 6 updates the modified ground object image 20a' by applying it to the aerial photographed image, The identification code link module 9 links the link information stored in the link information DB 1' to the modified ground object image 20a' modified by the image drawing module 6 to provide the user with the modified ground object image. When (20a') is selected, the relevant link information is searched from the link information DB (1') and output. This is explained in more detail below.

As shown in Figures 11 to 13, the image processing method according to the present invention corrects the side part of the ground object captured during aerial photography, so that the aerial photography image completed as a map can accurately display only the plane of the ground object, and through this, The aerial image allows the map to function effectively.

The image processing method is explained as follows.

S11; Step to select modification target

The output module 3 outputs aerial images including various ground object images 10a and 20a, and as described above, the point selection module 4 and the image search module 5 output the modified ground object image 20a. Explore and decide.

When outputting by the output module (3), the original aerial photography image may be output as is, or a colored and modified aerial photography image may be output by the coloring module (8). The output module (3) allows the user to It would be desirable to selectively output the above two types of aerial photography images according to one's own choice.

S12; Step to set reference point for modification

Once the modified ground object image 20a is determined, the range occupied by the modified ground object image 20a is confirmed in the aerial photography image, and the edges of the modified ground object image 20a are set as reference points (a1 to a6). do. Of course, the edges selected as reference points a1 to a6 also include edges a3 and a4 located at the boundary between the flat surface and the side surface of the crystal ground object image 20a, as shown in FIG. 12(a).

To this end, the image search module 5 confirms the color collectively assigned by the coloring module 8 to the pixels corresponding to the modified ground object image 20a and determines the boundary of the modified ground object image 20a. Set the reference points (a1 to a6) by checking the corner portion of the confirmed boundary.

When the image search module 5 sets the reference points (a1 to a6) of the modified ground object image 20a, the total width (w1) and the plane of the modified ground object image 20a are based on these reference points (a1 to a6). Calculate the subwidth (w2) respectively.

For reference, the reference point (a1 to a6) is set, and the image search module 5 checks the coordinate value for the corresponding point through pixels, and uses these coordinate values to create a modified ground object image ( 20a), the overall width (w1) and the width of the flat portion (w2) can be calculated. Here, the overall width w1 and the flat portion width w2 will be the length of the entire and flat portion in the tilted direction of the crystal ground object image 20a.

In addition, since the color designation by the coloring module (8) is to increase the accuracy of the search function and calculation function of the image search module (5), it is necessary to set the reference point for the correction target and reference target by the image search module (5). Once completed, the aerial image can be restored to its original state, or the color designation by the coloring module (8) can be applied to a copy of the aerial image to set a reference point, and then either discarded or stored in the image DB (1). There will be.

S13; Standard object selection stage

When photographing the ground from an aircraft in flight, the plane of a specific ground object can be accurately photographed, as shown in FIG. 11. Of course, it is not possible to capture only the flat surface of the reference ground object 10 at 100% and output it as an aerial image, so if the user can identify the surrounding road image 30 while being perceived as a flat surface when checking with the naked eye, the reference ground object 10 can be recognized as a flat surface. This may be sufficient to be selected as image 10a.

Meanwhile, the user selects the reference ground object 10 that satisfies the above-mentioned conditions as the reference object, but it is desirable to select it by considering the location of the modified ground object 20 selected as the target for correction. In other words, the reference ground object 10 selects a ground object located on the same straight line as the inclined direction so that the side of the crystal ground object 20 is visible, and uses this as a reference object.

Therefore, the image search module 5 forms a search straight line in the direction in which the modified ground object image 20a covers the road image 30, and the output module 3 outputs the search straight line to the touch screen 3a. , allowing the user to touch and input the point to be selected as the reference ground object image (10a) among the images located on the search line.

S14; Reference target reference point setting stage

When the reference ground object image 10a is selected, the image search module 5 checks the designated color of the pixel at the point touched by the user, and selects the range of pixels that are the same or similar to the color as the boundary of the reference ground object image 10a. Confirm, check the corner portion of the boundary thus determined, and set the reference points (b1 to b4). Of course, since the pixels corresponding to the reference ground object image 10a are also assigned the same color by the coloring module 8, the reference ground object image 10a will also be accurately defined and set.

When the reference points (b1 to b4) are set, the image search module 5 calculates the plane width L1 of the reference ground object image 10a as described above based on the reference points (b1 to b4).

S15; Shooting angle calculation steps

When the reference ground object image 10a is selected, the image mapping module 7 photographs the reference ground object 10 while the aircraft being photographed is located directly above the reference ground object 10, as shown in FIG. 11. Structure it by doing it.

Meanwhile, the image mapping module 7 checks the actual center distance d between the reference ground object 10 and the modified ground object 20. The center distance (d) is calculated by calculating the distance between the center point within the reference points (b1 to b4) of the reference ground object image (10a) and the center point (a3 to a6) of the flat part of the modified ground object image (20a), and then calculating the resulting value. can be obtained by converting to the scale of an aerial photography image.

In addition, the image search module (2) searches and confirms the altitude (h2) of the aircraft and the actual height (h1) of the crystal ground object (20) when shooting the aerial image in the image DB (1).

Subsequently, the image mapping module 7 calculates the shooting angle (θ) of the crystal ground object 20 photographed from the aircraft. Here, the shooting angle (θ) refers to the angle between the shooting direction of the camera and the arrangement direction of the crystal ground object 20. Therefore, while the aircraft is located directly above the reference ground object 10, the shooting angle θ at which the aircraft's camera photographs the reference ground object 10 will be '0 degrees'.

To calculate the shooting angle (θ), use [Equation 1] below.

[Equation 1]

S16; Edit target range calculation step

As shown in Figures 11 and 12, if the aircraft's camera is not located directly above the crystal ground object 20, the captured crystal ground object image 20a is the flat surface and side portion of the crystal ground object 20. is included and printed out.

In other words, the area within the aerial image that appears to be occupied by the crystal ground object image 20a is different from the area obtained by calculating the two-dimensional area that the crystal ground object 20 occupies on the ground to the scale of the aerial image.

To explain this in more detail, the crystal ground object image 20a is a crystal ground object 20 photographed at an angle during aerial photography, and the crystal ground object image 20a includes the flat part and the side part of the crystal ground object 20. As a result, the ground portion that is not actually occupied by the crystal ground object 20 is covered by the crystal ground object 20. In the aerial photography image taken in this way, the part covered by the crystal ground object 20 was confirmed to be a part of the crystal ground object 20, so the crystal ground object image 20a is a structure larger than the actual appearance of the crystal ground object 20. It becomes visible.

Of course, this error obscures the road image 30 adjacent to the corrected ground object image 20a so that it is not visible, so users who use a map created based on the aerial image are confused when using the map.

Therefore, in order to solve this problem, the size of the crystal ground object image 20a output on the aerial photography image is corrected to produce the same effect as if the aircraft was photographed directly above the crystal ground object 20. proceed.

For this purpose, the image drawing module 7 substitutes the flat portion width (w2) and the shooting angle (θ) of the modified ground object image 20a in the aerial photography image to be corrected into [Equation 2], Calculate the corrected flat width (L2) when the plane in (20) is photographed from directly above.

[Equation 2]

S17; Image correction stage to be corrected

The image drawing module 7 completes the corrected ground object image 20a' according to the corrected plane width L2 and stores it in the image DB 1 as data in a separate layer format. The corrected modified ground object image 20a' has the side portion of the existing modified ground object image 20a removed, and the size of the flat portion is corrected to match the corrected flat portion width L2.

Here, the drawing of the modified ground object image 20a' by the image drawing module 7 proceeds as follows.

First, only the flat part of the existing modified ground object image 20a is cut to secure an independent flat image. The planar image secured in this way is transformed according to the ratio of the corrected planar width (L2) of the revised ground object image (20a') to the width (w2) of the planar part of the existing modified ground object image (20a). This transformation is Known and publicly available image transformation technologies can be applied.

For reference, image transformation technology refers to 'Photoshop (a raster graphic editor developed by Adobe Systems)', 'Paint', a graphic editor for Windows, Microsoft's representative operating system, and 'pasting' images in a typical Word program. This is a function widely applied in technology, etc., and the image drawing module 7 can determine the ratio of the horizontal and vertical lengths of the image through the above function and adjust the size of the image to that ratio.

Meanwhile, the reference when synthesizing the modified planar part by the image editing module 6 is the edges a1 and a2 directly facing the reference ground object image 10a. This is because, regardless of the tilted appearance of the modified ground object image 20a, the corners a1 and a2 are always at a fixed position on the ground compared to the reference ground object image 10a.

Subsequently, the modified ground object image 20a' takes a separate layer format separate from the aerial photography image, and is linked to the related link information of the link information DB 1' by the identification code link module 9. It is saved in image DB (1).

Meanwhile, the identification code link module 9 outputs a separate window with link information posted, so that when the user selects the modified ground object image 20a' in layer format, the identification code link module 9 recognizes this and outputs the above window.

Here, since the modified floor plan of the modified ground object image 20a' is a ground object such as a building, the link information will be data such as the name, location, size, use, etc. of the ground object.

S18; Image synthesis stage

As shown in FIG. 12, when the correction of the modified ground object image 20a' is completed, processing of the shaded portion D that was occupied by the existing modified ground object image 20a and could not be output is required. For this purpose, the image editing module (6) searches for other aerial images in which the actual image of the shaded portion (D) was captured in the image DB (1) through the image search module (2), and modifies the other aerial images found in this way. Match the size and resolution of the aerial image containing the ground object image (20a'). For reference, the aerial image stored in the image DB (1) is data that functions as a digital map, so the aerial image is digital map data with GPS coordinates applied. Therefore, the image editing module 6 checks the GPS coordinates for the shaded portion (D) and searches the image DB (1) based on this to search for other aerial photography images in which the entire shaded portion (D) is displayed normally. You can.

If the size and resolution of the actual image and the aerial photographed image match, the image editing module 6 modifies the actual image of the shaded portion (D) cut out from another aerial photographed image into an aerial photographic image including the ground object image 20a'. By compositing the shaded part (D) of the image, the shaded part (D) is removed as shown in Figure 13 (an image showing a vertical aerial photography image corrected according to the image processing method according to the present invention), and a complete vertical aerial photography is obtained. Allow the image to be output.

S19; Vertical aerial photography image data update stage

When the correction of the modified ground object image 20a' is completed, the image editing module 6 updates the aerial image data synthesized with the actual image by inputting it into the image DB 1.

In this way, the processing modules (M, see FIG. 14) that process an extremely large amount of data, i.e. big data, radiate high heat, and this heat is generated inside the enclosure (see 1302, 14) constituting the image processor 800. If the processing modules (M) are not cooled quickly, their lifespan is shortened due to deterioration phenomena such as errors, shutdown due to overload, and short circuit due to dust or moisture generated inside the housing 1302, and processing efficiency is reduced. The downside is that it drops sharply.

For this reason, the housing 1302 must be cooled by an indirect cooling method. However, because indirect cooling has a low cooling effect, equipment that has adopted the indirect cooling method so far has low cooling efficiency and has not significantly contributed to preventing deterioration of the equipment.

The present invention adopts a direct cooling method to overcome such limitations. However, if moisture comes in contact during direct cooling, a short circuit may occur, so it is characterized by a special structure that can supply dry cooling air to prevent this.

In addition, a door 1304 through which workers can enter and exit for maintenance is installed on the front of the housing 1302, and a cooling unit (C) is installed on the rear.

In addition, a temperature detection sensor 1306 is installed on the inner ceiling of the housing 1302, and a controller 1308 is installed on the upper front of the housing 1302 to determine the detected temperature value of the temperature detection sensor 1306. Accordingly, the controller 1308 controls the operation of the cooling unit (C).

To implement this, the cooling unit (C) has a plurality of through holes formed at the rear of the housing 1302, the bottom of which becomes the discharge hole 1310, and the rest become the supply holes 1320.

In addition, check valves 1312 and 1322, which are one-way opening and closing valves that open and close in opposite directions, are installed in the discharge hole 1310 and the supply hole 1320, respectively.

Therefore, the discharge check valve 1312 installed in the discharge hole 1310 opens only in the discharge direction, and the supply check valve 1322 installed in the supply hole 1320 opens only in the supply direction.

In addition, a supply and exhaust pipe 1330 is connected to the discharge hole 1310 and the supply hole 1320.

In addition, a dry cold air generator 1340 is connected and installed at the top of the supply and exhaust cylinder 1330.

In particular, as illustrated, the air supply and exhaust cylinder 1330 is divided into an air supply unit 1332 and an exhaust unit 1334.

Therefore, the air supply or exhaust air does not mix with each other or interfere with each other.

In addition, a right-angled triangular block 1350 is fixed inside the air supply unit 1332 to increase air supply efficiency.

The right-angled triangular block 1350 narrows the flow path of the air supply section 1332 toward the bottom, thereby increasing the flow rate, which is effective in causing the amount of air supplied to the upper, middle, and lower supply holes 1320 to become uniform.

At this time, the surface of the right triangle block 1350 may be coated with a slider to reduce friction and increase air flow. A preferred slider is CZ (N-cyclohexybenzothiazole) for 100 parts by weight of polycarbonate resin. -2-sulfenamide) 15 parts by weight, sodium erythorbate 25 parts by weight, polyphosphate salts 10 parts by weight, tetraisopropyl titanate 10 parts by weight, dibutyl sebacate sebacate) is made by mixing 10 parts by weight.

In this case, CZ (N-cyclohexybenzothiazole-2-sulfenamide) is added to increase surface slip properties, reduce friction, smooth the flow rate of fluid, and maximize the prevention of foreign matter adhesion.

In addition, sodium erythorbate prevents oxidation and increases photothermal resistance, and increases discoloration resistance and corrosion resistance against ultraviolet rays.

In addition, polyphosphate salts enhance durability by increasing the tear strength and tensile strength of the surface, and improve corrosion resistance, water resistance, and slip properties.

In addition, tetraisopropyl titanate is [(CH ₃ ) ₂ CH] ₄ ㆍTi, a material corresponding to CAS number 546-68-9, and has durability, heat resistance, waterproofing, slip properties, and durability of the coating layer. It is added to increase both wear resistance and friction reduction.

In addition, dibutyl sebacate is a material corresponding to CAS number 109-43-3, which increases the thermal decomposition resistance of the coating layer and enhances sliding properties.

On the other hand, as shown in the example of FIG. 15, a plurality of processing modules M are seated on the tray 1500 and then mounted on the motherboard in the housing in a sliding manner.

At this time, the tray 1500 connects a pair of frame blocks 1510, a sliding guide groove 1520 recessed on the upper surface of the frame block 1510, and a pair of frame blocks 1510. A connecting plate 1530 is formed on the connecting plate 1530 to connect the middle of the upper and lower heights of the frame block 1510 to create a space by having a step with the upper surface of the frame block 1510, and to induce air flow. It includes a plurality of air flow holes 1540.

In addition, the processing module (M) is formed at the rear end with a contact portion (figure omitted) that can be inserted into the motherboard, and on both sides of the lower surface, there are sliding pieces (figure omitted) that fit into the sliding guide groove 1520. protrudes in the direction

Therefore, there is an advantage that the processing module (M) can be mounted easily and conveniently by simply placing it on the tray 1500, inserting it into the sliding groove 1520, and then pushing it.

On the other hand, as shown in the example of FIG. 16, the dry cold air generator 1340 includes a main case 1341 and a case cover 1342 that seals the open upper part of the main case 1341.

At this time, the main body case 1341 is formed in a cylindrical shape.

In addition, a cylindrical first separation wall 1343 is formed inside the main body case 1341, and a second separation wall 1344 is formed inside the first separation wall 1343, so that each has a space. .

In addition, an air supply fan 1345 is installed in the innermost space, and the air supply fan 1345 is a fan that sucks in air from the top and powerfully discharges it to the bottom.

In addition, a plurality of first intake holes 1346 are formed in the main body case 1341 at a position of more than half of the upper and lower width along the circumferential direction, and a plurality of first intake holes 1346 are formed at a position of less than half of the upper and lower width of the first separating wall 1343. A plurality of second intake holes 1347 are formed, and a plurality of third intake holes 1348 are formed at more than half the upper and lower width of the second separation wall 1344, and the first and second separation walls 1343 A dehumidifier 1349 is disposed in the space between , 1344).

The dehumidifier 1349 is a ball-shaped member made of silica gel and is charged into the dehumidifying cloth.

And, most importantly, the first, second, and third intake holes (1346, 1347, and 1348) have holes in the order of first intake hole (1346) > second intake hole (1347) > third intake hole (1348). is structured differently.

This is to have cooling characteristics by inducing a temperature drop due to adiabatic expansion and adiabatic compression that occurs when air passes from a large bore to a small bore under strong pressure. Even if the temperature does not drop significantly, it can be maintained below room temperature. There is an advantage.

Accordingly, when the air supply fan 1345 rotates at high speed and strongly sucks in the outside air, the outside air passes through the first, second, and third intake holes 1346, 1347, and 1348 with strong suction pressure, causing a temperature drop. At the same time, as it passes through the dehumidifier 1349, moisture is removed and only dry cooled air is discharged and supplied.

Therefore, because this air is dry, no short circuit problem occurs even if the modules are cooled directly.

In addition, in the present invention, the main case 1341 and case cover 1342 are composed of 35 parts by weight of polyurethane resin, 10 parts by weight of ethylene glycol, and 2-phenylimidazole based on 100 parts by weight of polymethylpentene. It is molded with a resin composition that mixes 5.5 parts by weight of (2-Phenylimidazole), 10 parts by weight of polytetrafluoroethylene, 5 parts by weight of chondroitin-sulfide salt, and 5 parts by weight of vanadium oxide.

Here, polymethylpentene has high heat resistance, chemical resistance, and electrical insulation properties, and facilitates the flow of air through its high friction reduction properties.

And, 2-Phenylimidazole is CAS No. It is a material corresponding to 670-96-2, which reduces drying shrinkage, suppresses deformation and increases durability.

In addition, polytetrafluoroethylene is a polyfluoroethylene PTFE-D (Dispersion) with the structural formula (-CF2-CF2-)n, which improves heat resistance as well as lubricity, thereby improving release properties and strengthening water resistance and moisture resistance.

In addition, chondroitin sulfate salt reduces stickiness and increases the slipperiness of air.

In addition, vanadium oxide (V ₂ O ₅ ) increases the effects of preventing discoloration, suppressing distortion, and suppressing deformation by blocking ultraviolet rays.

On the other hand, a buffering means 1400 as shown in FIG. 17 may be further provided on the lower surface of the housing 1302.

The buffer means 1400 includes an upper plate 1410 fixed to the lower surface of the housing 1302, a lower plate 1420 seated on the bottom, and a convex downward convex portion from the center of the upper plate 1410. A convex part 1440, an upward convex part 1450 convex upward from the center of the lower plate 1420, and a damper that cushions both ends of the upper plate 1410 and the lower plate 1420 by binding them up and down. Includes (1430).

At this time, the downward convex part 1440 and the upward convex part 1450 should not touch each other and are designed to maintain a certain gap.

This is because, after the first buffering action through the damper 1430, the two convex parts come into contact with each other and then elastically deform each other when additional external force is applied, acting as a leaf spring, performing a secondary buffering action in the process, providing a perfect buffering function. I do it.

Therefore, it has the advantage of being able to sufficiently cover and buffer even significant vibration shocks, thereby preparing for earthquakes, etc.

Furthermore, in the present invention, in order to prevent the problem of dust being supplied directly without being filtered when external air is supplied as is, a filter of the type shown in FIG. 18 is used in the supply and exhaust pipes constituting the dry cold air generator 340 and the cooling unit (C). (330) It is installed on a duct (drawing number omitted) or pipe connecting the two.

In particular, the filter is installed to be replaceable and consists of a filter frame 11 and a filter body 12 mounted inside the filter frame 11.

Thus, the filter body 12 acts to filter out dust.

Here, the present invention also has the feature of specially coating the surface of the filter frame 11. The reason is that since it is usually made of PVC, the dust to be filtered is rather than the filter frame (11) due to the large charging characteristics of PVC. ) to prevent it from becoming clogged with dust as it grows and causing a supply failure.

In other words, it is configured to have anti-static properties.

For this purpose, an antistatic agent is applied to the surface of the filter frame 11 formed of PVC, and the antistatic agent is dodecyldimethylbenzylammonium for 100 parts by weight of PVC so that it can be firmly fixed to the filter frame 11. It is composed by mixing 10 parts by weight of chloride, 15 parts by weight of montmorillonite powder, 5 parts by weight of pyromellitic anhydride, 5 parts by weight of hydroxyproline, and 10 parts by weight of polyoxyethylene lauryl ether.

In this case, dodecyldimethylbenzylammonium Chloride is added to improve slip properties by inducing surface uniformity.

In addition, montmorillonite lacks electrostatic charge on the crystal itself because a portion of Al, the central atom of the alumina octahedron, is replaced with Mg, but due to its structural characteristics, positive ions such as Na ⁺ or Ca ²⁺ enter between the crystal and crystal layers to form a stable state. It has anti-static properties and contributes to suppressing the adhesion of dust or foreign substances when mixed with synthetic resin.

In addition, pyromellitic dianhydride is a material corresponding to CAS number 89-32-7, and is added to enhance slip properties, improve moldability, and improve anti-static properties.

Additionally, hydroxyproline smoothes the surface and increases slipperiness, thereby blocking the adhesion of foreign substances and increasing self-cleaning power.

In addition, polyoxyethylene lauryl ether is a material corresponding to Cas number 9002-92-0. Due to its excellent surface activity, it activates the self-cleaning function, improves the ability to inhibit foreign matter adhesion, and strengthens anti-static properties. I order it.

100; aircraft 200; camera
300; Detection sensor 400; touch screen panel
500; control unit 600; GPS detection sensor
700; GPS satellite 800; image processor
900; ground control point

Claims (2)

A camera 200 installed on the aircraft 100; First and second detection sensors (300,310) installed on the aircraft (100) to detect an object (B) that interferes with photography moving below the camera (200); A touch screen panel 400 installed on the aircraft 100 to input control signals for controlling the control unit 500 and to display output contents according to the input control signals; It is installed on the aircraft 100, and when the aircraft 100 reaches the aerial photography area while the aircraft 100 is in operation, the aerial photography area is photographed through the camera 200, and objects that interfere with filming are detected by the detection sensor 300 during filming. When a signal is received, the relevant aerial photography area is designated as a re-photography area, and when a control signal to reset the shortest aerial route of the re-photography area is input from the touch screen panel 400, the shortest aerial path to the re-photography area is set, Ground reference coordinates are transmitted through communication with the control unit 500 and the aircraft 100, which transmits the captured aerial image to the image processor 800 of the ground center, and these ground reference coordinates and the position coordinates of the aircraft 100 are combined. In an aerial photography system that improves the clarity of images of terrain features, including a ground reference point (900) that guides the user to set a processing reference point for the captured image by comparison;
The image processor 800 includes a housing 1302 on which a plurality of processing modules (M) are mounted. A door 1304 is installed on the front of the housing 1302, and a housing is installed on the rear of the housing 1302. (1302) A cooling unit 300 is installed to directly cool the inside, a temperature detection sensor 1306 is installed on the inner ceiling of the housing 1302, and a temperature detection sensor 1306 is installed on the front upper side of the housing 1302. It includes a controller 1308 that controls the operation of the cooling unit (C) according to the temperature value detected by the detection sensor 1306;
A plurality of through holes are formed in the rear of the housing 1302, and the through holes are composed of a discharge hole 1310 at the bottom and supply holes 1320 other than the discharge hole 1310, and are supplied from the cooling unit (C). The dry cooling air is supplied into the housing 1302 through the supply hole 1320 and discharged to the outside of the housing 1302 through the discharge hole 1310;
A buffering means 1400 is further installed on the lower surface of the housing 1302, and the buffering means 1400 includes an upper plate 1410 fixed to the lower surface of the housing 1302 and a lower plate seated on the bottom surface. (1420), a downward convex portion 1440 convex downward from the center of the upper plate 1410, an upward convex portion 1450 convex upward from the central portion of the lower plate 1420, and the upper plate It includes a damper 1430 that cushions both ends of the 1410 and the lower plate 1420 by binding them up and down;
The dry cooling air is generated in the dry cold air generator 1340 and supplied to the supply/exhaust cylinder 1330 constituting the cooling unit (C). A replaceable filter is further installed, and the filter consists of a filter frame (11) and a filter body (12) mounted inside the filter frame (11), and the filter frame (11) is molded from PVC. An aerial photography system that improves the clarity of images of geographical features, characterized in that the surface of the filter frame (11) is coated with an antistatic agent.
According to paragraph 1,
The downward convex part 1440 and the upward convex part 1450, which constitute the buffer means 1400, are designed to maintain a certain gap without touching each other;
The cooling unit (C) includes check valves (1312, 1322) installed in the discharge hole (1310) and supply hole (1320), and a supply and exhaust pipe (1330) connected to the discharge hole (1310) and supply hole (1320). and a dry cold air generator (1340) connected to and installed at the top of the supply and exhaust cylinder (1330); The air supply and exhaust pipe 1330 is divided into an air supply part 1332 and an exhaust part 1334, and a right-angled triangular block 1350 that narrows the air supply path toward the bottom is fixed inside the air supply part 1332. ;
The dry cold air generator 1340 includes a cylindrical main case 1341 and a case cover 1342 that seals the open upper part of the main case 1341;
A cylindrical first separation wall 1343 is formed inside the main body case 1341, and a second separation wall 1344 is formed inside the first separation wall 1343 to have a space, and the most An air supply fan 1345 is installed in the inner space to suck in air from the upper part and powerfully discharge it to the lower part, and the main body case 1341 has a plurality of first intake holes at more than half the upper and lower width along the circumferential direction. (1346) is formed, and a plurality of second intake holes 1347 are formed at positions less than half of the upper and lower width in the first separation wall 1343, and half of the upper and lower width are formed in the second separation wall 1344. A plurality of third intake holes 1348 are formed at the above positions, and a dehumidifier 1349 is disposed in the space between the first and second separation walls 1343 and 1344, which improves the clarity of the image of the feature. Aerial photography system.

Images