JP2008171196A - Fish counting method, fish photographing device, and fish counting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fish counting method, a fish photographing device and a fish counting system, capable of improving the counting accuracy for counting of fishes moving in a fish-way. <P>SOLUTION: The counting system 10 includes a hydraulic turbine 20 including a plurality of compartments 24, a camera 30 provided in each compartment 24 within the hydraulic turbine 20, and a computer 40 for analyzing images taken by each camera 30 within the hydraulic turbine 20 for counting and tabulating fish. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to counting fish moving along a fishway, and relates to a fish counting method, a fish photographing apparatus, and a fish counting system capable of improving counting accuracy.

  As data for protecting the natural environment and maintaining aquatic organisms, fish passing through the fishway installed in rivers are counted, and the fish in the fishway is automatically counted for efficient counting. A number counting device has been proposed (for example, Patent Document 1 or 2).

  Patent Document 1 is provided with a camera for photographing a situation in a fishway, and a fish number measuring device for analyzing the photographed image data to detect the occurrence and disappearance of fish shadows and counting the fish passing through the fishway. It is disclosed.

Also, in Patent Document 2, an ultrasonic transducer is provided in the fishway, ultrasonic waves are emitted from the transducer, and reflected waves from fish (target) in the water are received by the receiver to measure the school of fish. However, an ultrasonic fish number measuring apparatus that automatically measures the quantity of fish is disclosed.
Japanese Patent Laid-Open No. 8-7069 JP 2006-3159 A

  However, the fish number counting apparatus described in Patent Document 1 or 2 captures dynamic information (information that changes over time) of a fish moving in the fishway by a camera or an ultrasonic transducer fixedly installed around the fishway. Since it is the structure which counts a fish, there existed a problem that the fish which moved faster than the speed which can be counted could not be counted.

  The present invention has been made in view of the above points, and relates to counting fish moving on a fishway, and provides a fish counting method, fish photographing apparatus, and fish counting system capable of improving counting accuracy. Objective.

In order to achieve the above object, the invention according to claim 1 of the present invention is a method of counting fish passing through a fishway,
When the columnar rotator provided with a plurality of accommodating portions for accommodating fish around the rotating shaft is rotated around the rotating shaft, the adjacent rotating portions sequentially Positioned so that the fishway is obstructed, and the fish swimming in the fishway is accommodated in the accommodation part, and installed in the fishway,
Rotating the columnar rotator around the rotation axis,
Each of the storage units is provided with a door for restricting the fish from entering and exiting the storage units,
For each housing part, the opening and closing of each door is controlled so that a period in which fish can enter and leave each housing part and a period in which fish cannot enter and exit alternately occur in time,
In each of the storage units, a camera for photographing the fish stored in the storage units is installed.
Shoot the fish housed in the housing section with the camera,
It is characterized in that the number of fish passing through the fishway is counted by processing an image photographed by the camera.

  According to the method for counting fish passing through the fishway according to the present invention, the fish that swims in the fishway is accommodated in the accommodating part of the columnar rotating body by opening the door provided in the accommodating part, and the fish is accommodated by closing the door. Since the fish confined in the unit for a certain period and the movement range restricted in the accommodating unit during the confining period can be reliably photographed by the camera installed in the accommodating unit, the number of fish can be analyzed by analyzing the photographed image. Can be accurately counted.

  The invention according to claim 2 of the present invention is an imaging device for fish passing through a fishway, and includes a plurality of accommodating portions for accommodating fish around the rotation axis and rotated around the rotation axis. And a columnar rotating body that is positioned so as to receive the fish swimming in the fishway in order to block the fishway in turn by each of the accommodating parts adjacent to each other, and each of the accommodating parts. A door that is provided in order to limit the entry and exit of fish to and from each of the storage units, and is controlled such that a period in which fish can enter and exit from each of the storage units and a period in which the fish cannot enter and exit are alternately generated in time. Each of the storage units includes a camera that photographs the fish stored in the storage units.

  The invention according to claim 3 of the present invention is a counting system for fish passing through a fishway, wherein a plurality of storage portions for storing fish are provided around the rotation axis and rotated around the rotation axis. And a columnar rotating body that is positioned so as to receive the fish swimming in the fishway in order to block the fishway in turn by each of the accommodating parts adjacent to each other, and each of the accommodating parts. A door that is provided in order to limit the entry and exit of fish to and from each of the storage units, and is controlled such that a period in which fish can enter and exit from each of the storage units and a period in which the fish cannot enter and exit are alternately generated in time. Each of the storage units has a camera for photographing the fish stored in each of the storage units, a CPU, and a memory, and the CPU executes the program stored in the memory. ,in front The video analysis unit that analyzes the video captured by the camera installed in each storage unit and counts the fish in each storage unit captured by each camera, and the video analysis unit counted for each camera And a counting information generation unit that calculates and stores the number of fish that pass through the fishway for each predetermined period by counting the number of fish.

  According to the counting system for fish passing through the fishway according to the present invention, the fish closed in the housing part with the door closed is restricted in the movement range within the housing part. The image taken and counted by the computer does not have to be dynamic information (moving image) of the fish moving in the fishway as described in Patent Document 1 or 2, and the fish is accommodated in the accommodating portion. It may be static information (still image) captured within a certain period. Thereby, compared with a system that analyzes and processes dynamic information of fish, it is possible to simplify the storage area such as a storage medium used for recording photographing information and the image processing performed by a computer or the like.

  The invention according to claim 4 of the present invention is the fish counting system according to claim 3, wherein the video analysis unit adds an image, an inter-image calculation, a binary value to a video signal output from the camera. By performing at least one of the process of calculating the area and calculating the area, the number of fish in the storage unit photographed by the camera is counted.

  According to the present invention, it is possible to provide a fish counting method, a fish photographing apparatus, and a fish counting system capable of improving the counting accuracy with respect to counting fish moving along a fishway.

== System configuration ==
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a configuration diagram for explaining a schematic configuration of a system (hereinafter referred to as a counting system 10) that counts fish passing through a fishway 12 according to the present embodiment. In addition, the counting system 10 of this embodiment is provided in the fishway 12 installed in the weir and dam in a river, for example.

  As shown in FIG. 1, the counting system 10 according to the present embodiment includes a water wheel 20 having a plurality of rooms 24 therein, a camera 30 provided in each room 24 in the water wheel 20, and each camera in the water wheel 20. And a computer 40 that counts and counts the fish by analyzing the video imaged by 30.

<Water wheel>
FIG. 2 is a perspective view of FIG. 1 for explaining the detailed structure of the water wheel 20.
The water turbine 20 has, for example, a cylindrical shape having a radius similar to the width of the fishway 12, and the inside thereof is radially divided into eight equal parts from the cylindrical shaft 21 by the partition 22, thereby forming eight chambers 24. Has been.

  For the installation of the water wheel 20, for example, first, a rectangular widened region 14 is formed in the fishway 12. The widened area 14 is set so that the outer shape of the water turbine 20 in which a part of the fishway 12 is widened and the cylindrical shaft 21 is in a vertical state is just accommodated. And the water wheel 20 is arrange | positioned in the area | region which straddles the wide area | region 14 and the fishway 12, and the lower end of the cylindrical shaft 21 is fixed to the bottom face of a fishway so that the water wheel 20 itself can rotate within the area | region. That is, the water wheel 20 is arranged at a position where the half region on one side blocks the fishway 12.

  The outer peripheral portion of the water wheel 20 and the internal partition 22 have a mesh structure made of, for example, a slit metal plate or a rope so as to be less susceptible to water resistance. Accordingly, the water flowing in the fishway 12 enters the water wheel 20 on one half of the water wheel 20 that blocks the flow, and acts to press the partition 22 while passing through the water wheel 20, so that the water wheel 20 moves in the circumferential direction. Will rotate. The mesh eyes are fine enough to prevent fish from passing through.

  Further, the outer peripheral portion of the water wheel 20 is also divided into eight equal parts so as to correspond to the respective rooms 24, and each is an opening / closing gate 26 that can be automatically opened and closed. For the open / close gate 26, for example, an electric shutter is used.

FIG. 3 is an enlarged perspective view of the electric shutter 260 which is the open / close gate 26 portion of FIG.
As shown in FIG. 3, the electric shutter 260 includes, for example, a slat 261 that opens and closes the room 24, a slat winder 264 that winds and unwinds the slat 261, and a sensor that detects opening and closing timing. 266 and a control unit 267 that controls the slat winding unit 264 in response to detection by the sensor 266.

  The slat 261 includes, for example, a plurality of mesh-like metal plates 262 and hinges 263, and opens and shuts off the room 24 by swinging along guide rails or the like provided on the upper and lower arc-shaped frames 268 of the water turbine 20. I do. That is, the fish is introduced into the room 24 from the fishway 12 by opening, or the fish in the room 24 is released, and the passage of the fish from the fishway 12 into the room 24 is prohibited by blocking, or the room The fish introduced in 24 is confined.

  The slat winding unit 264 includes a winding shaft (not shown) that winds the slat 261 therein, and an electric motor 265 for driving the shaft, according to the control of the electric motor 265 by the control unit 267. The slat 261 is wound or unwound.

For example, as shown in the figure, the sensor 266 is attached to a position B on the partition 22 and detects that the water wheel 20 has passed through the position A (see FIG. 1 or FIG. 2) and rotates. The unit 267 is notified, and a magnetic sensor, an optical sensor, or the like is used. Needless to say, a magnet, a light source, or the like for reacting these sensors 266 is also installed at the position A (see FIG. 2).
The control unit 267 controls the slat winding unit 264 in response to a notification from the sensor 266, and is a computer including a CPU and a memory, for example.
The electric shutter 260 described above is installed in all the rooms 24 in the water wheel 20, for example.

The open / close gate 26 operates as follows by the rotation of the water wheel 20.
FIG. 4 is a horizontal sectional view for explaining the opening / closing operation of the opening / closing gate 26 by the rotation of the water wheel 20.

  For example, in the room 24, it is assumed that the room 24a on the upstream side of the fishway 12 is open, that is, the slats 261 of the electric shutter 260 are all wound up by the slat winding unit 264 (S401). ). At this time, the storage unit such as a memory provided in the control unit 267 stores that the slat 261 is open (for example, sets a flag indicating that the slat 261 is open). In this state, the fish descending from the upstream side of the fishway 12 is introduced into the room 24a in which the slats 261 are opened.

  When the water wheel 20 is rotated by the water flow and the room 24a is moved and the sensor 266 installed at the position B detects that the position A of the gate reversal point 16 has passed, the control unit 267 receives the detection signal. Then, after recognizing that the slat 261 stored in the memory or the like is open (for example, a flag indicating that the slat 261 is open) is set, the electric motor of the slat winding unit 264 265 is operated to control to unwind the slat 261 (S402).

As a result, the open / close gate 26a is closed with the rotation of the water wheel 20, and the fish is confined in the room 24 (S403). At this time, a storage unit such as a memory provided in the control unit 267 stores that the open / close gate 26a is closed (for example, cancels the flag that the slat 261 is in the open state).
Further, the fish moves with the rotation of the water wheel 20 while being confined in the room 24a (S404).

  Then, when the water turbine 20 has made one full turn from S402 and detects that the sensor 266 at the position B has again passed the position A of the gate inversion portion 16, the control unit 267 receives the detection signal and stores it in the memory. After recognizing that the stored slat 261 is closed (for example, that the flag is released), the electric motor 265 of the slat take-up unit 264 is operated to take up control of the slat 261 ( S405). As a result, the slat 261 is opened, and the fish introduced into the room 24a is discharged downstream (S406). At this time, a storage unit such as a memory provided in the control unit 267 stores that the open / close gate 26a is opened.

  Then, the water wheel 20 rotates and returns to the state of S401, and the operations of S401 to S406 are repeated again.

  As described above, the electric shutter 260 described above is installed in all the rooms 24 in the water wheel 20, and the opening / closing of these open / close gates 26 is set to operate alternately with respect to the adjacent rooms 24, for example.

<Camera>
The camera 30 is installed in each of the rooms 24 of the water wheel 20 at a position near the cylindrical shaft 21 as shown in FIG. 2, for example, so that the inside of the room 24 can be viewed from above. Thereby, even if the water wheel 20 rotates, the image in the room 24 can be taken at a fixed position.

  The camera 30 is connected to the LAN via a PC camera that is connected to the computer 40 according to, for example, the USB standard or the IEEE 1394 standard, a Web camera that has a network connection function and can be directly connected to the LAN, a video server, and the like. A type of camera or the like is used. The video image | photographed with the camera 30 provided in each room 24 is transmitted to the computer 40 (refer FIG. 1). For example, the camera 30 is linked with the control unit 267 capable of recognizing the open / closed state of the open / close gate 26 described above so as to transmit an image only when the open / close gate 26 of the room 24 is closed to the computer 40. Is set to

  A plurality of cameras 30 may be provided at different positions with respect to one room 24. Thus, even when a plurality of fish shadows are overlapped and cannot be discriminated when a fish in the room 24 is photographed from one camera 30, it is possible to refer to an image photographed by the camera 30 provided at another position. Since the spatial arrangement of the overlapping fish becomes clear, the accuracy of fish shadow discrimination is improved.

<Computer>
FIG. 5 is a block diagram for explaining the hardware configuration of the computer 40.
The computer 40 includes a CPU 401, a memory 402, an external storage device 403, a recording medium reading device 404, a video processing device 405, an input device 406, an output device 407, and the like. These components are communicably connected via a bus such as a PCI component (Peripheral Component Interconnect Bus).

  The CPU 401 performs overall control of various hardware constituting the computer 40 and executes programs stored in the memory. Thereby, various functions provided by the computer 40 are realized.

The memory 402 is a RAM / ROM or the like, and stores data and programs.
The external storage device 403 provides a storage area in which the CPU 401 or the like can read / write data. The external storage device 403 is, for example, a hard disk drive. The recording medium reading device 404 is a flexible disk device, a CD-ROM device (or CD-R / W device), a DVD-ROM device (or DVD-R / W device), or the like.
The recording medium reading device 404 reads data recorded on a recording medium 4041 such as a flexible disk, a CD-ROM, or a DVD-ROM. In the recording medium 4041, for example, a program to be executed by the computer 40 is recorded.

  The video processing device 405 is, for example, a video capture card. The video processing device 405 appropriately compresses still images not only for moving images but also for predetermined conditions such as JPEG (Joint Photographic Experts Group) from video data taken by the cameras 30 installed in the rooms 24 of the water turbine 20. It has a function as an encoder that generates data compressed into a format and a decoder that generates a video signal by decoding a compressed still image.

The input device 406 receives a signal input by a user operating a mouse or a keyboard.
The output device 407 outputs a signal sent from the CPU 401, the video processing device 405, or the like through a bus to the display.
In the computer 40, an operating system is operating.

<Computer functions>
Various functions implemented in the computer 40 will be described with reference to FIG.
The video signal receiving unit 511 receives the video signal transmitted from each camera 30 installed in the water wheel 20 and delivers it to the encoding unit 512.

  The encoding unit 512 generates still image data under a predetermined condition based on the video signal delivered from the video signal receiving unit 511, and stored data obtained by compressing the generated still image data in an appropriate compression format such as a JPEG format. And the generated stored data is delivered to the video management unit 513 described below. Note that the encoding unit 512 generates storage data in, for example, an Exif (Exchangeable Image File Format) format and adds shooting date / time information.

  The video management unit 513 stores the storage data transferred from the encoding unit 512 in the external storage device 403. This storage data is stored (written) in the external storage device 403 for each storage data generated by the encoding unit 512. The video management unit 513 manages (stores) the stored data in a database 519 described later. In addition, the video management unit 513 causes the decoding unit 514 described later to decrypt the stored data registered in the database 519 in response to an operation input performed by the site manager or the like with respect to the input device 406, and the decoded playback still image is decoded. The image is output to the output device 407. As a result, the site manager or the like can check the still image captured by each camera 30 provided in the water wheel 20 at any time. The video management unit 513 also provides a function for editing and processing video data. Thereby, the site manager or the like can freely process the video data into a state suitable for analysis.

The decoding unit 514 generates still image data by decoding the storage data.
The video analysis unit 515 reads the storage data stored in the external storage device 403 from the external storage device 403, decodes it by the decoding unit 514, analyzes the decoded still image data, and passes through the fishway 12 for each still image. Count the finished fish. That is, the video analysis unit 515 counts fish based on still images taken by the camera 30 provided in each room 24 in the water wheel 20. The video analysis unit 515 stores the counted number of fish in the memory 402 in association with the identifier of each camera 30 or registers (stores) it in the database 519.

  The counting information generation unit 516 reads out and counts the number of fish photographed by each camera 30 provided in the water wheel 20 counted by the video analysis unit 515 from the memory 402 or the database 519, and sets the water wheel 20 for each predetermined period. Find the number of fish that pass through. The count information generation unit 516 obtains the number of fish that have passed through the water wheel 20 for a predetermined period such as year, month, day, or hour, and registers (stores) the obtained result (hereinafter referred to as a count result) in the database 519. )

  The database 519 stores storage data and counting results.

== Counting method ==
Next, processing performed by the computer 40 for obtaining the number of fish passing through the fish passage 12 every predetermined period will be described with reference to the flowchart shown in FIG.

  In the processing of S611, first, storage data corresponding to a predetermined period to be counted by the count information generation unit 516 is read from the external storage device 403 by referring to the shooting date / time information attached to the storage data by the video analysis unit 515. The read storage data is decoded to generate still image data, and the generated still image data is stored in the external storage device 403 (S611). The predetermined period to be counted can be specified every hour, every minute, every second, or the like.

  Next, the video analysis unit 515 reads a predetermined piece of the still image data decoded in the process of S611 from the external storage device 403 to the memory 402 (S612).

  Next, the video analysis unit 515 performs processing such as image addition, inter-image calculation, binarization, and area calculation on the still image data read to the memory 402 (S613), and writes the data subjected to the above processing to the memory 402. (S614).

  Next, the video analysis unit 515 includes, for example, by evaluating the area of the image area included in the data written in the memory 402 and containing significant data, it is included in the still image data. The presence and number of fish shadows are determined (S615). Here, the evaluation of the area is performed, for example, by determining that a fish shadow exists if the area of the extracted region is an area equal to or larger than a preset threshold value, and determining that it is not a fish shadow if it is less than the threshold value. When a plurality of cameras 30 are installed in one room 24, the presence / absence and number of fish shadows are determined with reference to images of the plurality of cameras 30.

  Even if the fish stored in the room 24 in the water wheel 20 is opened to the fishway 12 by opening the opening / closing gate 26, the fish does not go out of the room 24 to the fishway, It is assumed that the room 24 to be entered again passes through the gate inversion portion 16 and the opening / closing gate 26 is closed, so that the room 24 is accommodated in the room 24 again. Therefore, the video analysis unit 515 determines whether or not the fish shadows photographed in each still image are the same. As a result, when the fish shadow of the same fish is included in different still images, the overlapping portion is not counted so as not to be counted repeatedly. Here, it is possible to determine whether or not the fish shadow is a fish shadow of the same fish by applying a known pattern matching algorithm. In addition, counting is usually performed for each fish shadow, but for the determination of fish species, a pattern matching algorithm should be applied to the fish shadow to be determined and the fish shadow of each fish species that has been stored in advance. Can be done.

  The video analysis unit 515 determines the presence / absence and number of fish shadows determined as described above, an identifier for identifying the still image data to be determined, and the shooting date / time information of the still image data, Is attached and stored in the memory 402 or the database 519.

  Next, the count information generation unit 516 reads out the determination result of the presence / absence and number of fish shadows from the video analysis unit 515 from the memory 402 or the database 519, and determines that the fish shadow exists (S616: exists), The number is counted, and the counted value is added to the counter (S617). Thereafter, the process proceeds to S618. On the other hand, if it is determined in S616 that there is no fish shadow (S616: does not exist), the process proceeds to S618.

  In the subsequent processing of S618, there is data corresponding to still image data that has not yet been read out to the memory 402 among the still image data decoded by the processing of S611 and stored in the external storage device 403 by the count information generation unit 516. Determine whether to do. For this determination, for example, shooting date / time information of still image data that has already been read into the memory 402 is stored in the memory 402, and still image data with shooting date / time information that has not been read into the memory 402 is stored in the external storage device 403. This is done by determining whether it exists in the inside.

  If there is still image data that has not yet been read into the memory 402 (S618: exists), the processing from S612 is performed again for still image data that has not yet been read. If there is no still image data that has not been read in the memory 402 (S618: does not exist), the counter value is stored in the memory 402 (S619), and the process is terminated. The counter value is appropriately stored in the external storage device 403.

  As described above, the number of fish passing through the water wheel 20 for each predetermined period is counted. The count information generation unit 516 obtains the number of fish that have passed through the water wheel 20 for a predetermined period such as year, month, day, or hour based on the count result, and registers the count information in the database 519. .

  The result information registered in the database 519 allows the user to input a desired period from the input device 406 from the mouse or keyboard, and to output the count result of the fish in that period to the display via the output device 407. it can.

  As described above, the fish counting system 10 passing through the fishway according to the present embodiment has a cylindrical shape, and is provided with a plurality of chambers 24 around the cylindrical shaft 21 for accommodating fish. And the water turbine 20 installed in the fishway 12 that is positioned so as to receive the fish swimming in the fishway 12 in the room 24 in order by blocking the fishway 12 in order by the adjacent rooms 24. And an open / close gate 26 that is provided to restrict the entry and exit of the fish to and from each room 24 and is controlled so that a period during which fish can enter and exit from each room 24 and a period during which fish cannot enter and exit are alternately generated in time. Each room 24 has a camera that captures the fish housed in each room 24, a CPU and a memory, and the CPU executes a program stored in the memory. The video analysis unit that analyzes the video shot by the camera installed in each room 24 and counts the fish in each room 24 shot by each camera, and the fish counted by the video analysis unit for each camera The computer 40 includes a counting information generation unit that calculates and stores the number of fish that pass through the fishway 12 for each predetermined period by counting the number, so that the opening / closing gate 26 is provided in the room 24 of the water wheel 20. The fish swimming in the fishway 12 is accommodated by opening the door, the open / close gate 26 is closed, the fish is confined in the room 24 for a certain period, and the fish whose movement range is restricted in the room 24 during the confinement period is stored in the room 24 Since the camera 30 can be reliably photographed, the number of fish can be accurately counted by analyzing the photographed image.

  In addition, the fish trapped in the room 24 with the open / close gate 26 closed is restricted in the movement range within the room 24, so the fish is photographed by the camera 30 installed in the room 24 and counted by the computer 40. It is not necessary for the image to be made to be dynamic information (moving image) of the fish moving in the fishway as described in Patent Document 1 or 2, and is taken within the period in which the fish is accommodated in the room 24 Static information (still image) may be used. Thereby, compared with the counting system which analyzes and analyzes dynamic information of fish, it is possible to simplify the storage area such as a storage medium used for recording photographing information and the image processing performed by the computer 40.

  In addition, according to the counting system 10 according to the present embodiment, the number of fish that descend from the upstream to the downstream is counted. However, the present invention is not limited to this, and the number of fish that run upstream from the downstream can also be counted. In this case, the water turbine 20 can be realized by providing power for rotating the water wheel 20 in the direction opposite to that of the present embodiment and rotating the water wheel 20 in the reverse direction.

It is a block diagram for demonstrating the schematic structure of the system which counts the fish which passes the fishway 12 based on this embodiment. It is a perspective view of Drawing 1 for explaining the detailed structure of water turbine 20 concerning this embodiment. FIG. 3 is an enlarged perspective view of an electric shutter 260 that is a part of the open / close gate 26 of FIG. 2 according to the present embodiment. It is a horizontal sectional view for explaining opening and closing operation of opening and closing gate 26 by rotation of water wheel 20 concerning this embodiment. It is a block diagram for demonstrating the hardware constitutions of the computer 40 based on this embodiment. It is a figure which shows the various functions implement | achieved in the computer 40 based on this embodiment. It is a flowchart for demonstrating the process which calculates | requires the number of the fish which passes the fishway 12 for every predetermined period based on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Counting system 12 Fishway 14 Widening area 16 Gate inversion place 20 Water wheel 21 Cylindrical shaft 22 Partition 24, 24a Room 26, 26a Opening / closing gate 30 Camera 40 Computer 401 CPU
402 Memory 403 External Storage Device 404 Recording Medium Reading Device 405 Video Processing Device 406 Input Device 407 Output Device 511 Video Signal Receiving Unit 512 Encoding Unit 513 Video Management Unit 514 Decoding Unit 516 Count Information Generation Unit 519 Database

Claims (4)

A method for counting fish passing through a fishway,
When the columnar rotator provided with a plurality of accommodating portions for accommodating fish around the rotating shaft is rotated around the rotating shaft, the adjacent rotating portions sequentially Positioned so that the fishway is obstructed, and the fish swimming in the fishway is accommodated in the accommodation part, and installed in the fishway,
Rotating the columnar rotator around the rotation axis,
Each of the storage units is provided with a door for restricting the fish from entering and exiting the storage units,
For each housing part, the opening and closing of each door is controlled so that a period in which fish can enter and leave each housing part and a period in which fish cannot enter and exit alternately occur in time,
In each of the storage units, a camera for photographing the fish stored in the storage units is installed.
Shoot the fish housed in the housing section with the camera,
A fish counting method, comprising: counting fish passing through the fishway by processing an image taken by the camera. An imaging device for fish passing through a fishway,
A plurality of housing portions for housing fish are provided around the rotation axis, and when the rotation is performed around the rotation shaft, the fish passage is blocked in order by each of the adjacent housing portions, and the fish path is swam in the housing portion. A columnar rotator that is positioned to accommodate the fish to be installed and installed in the fishway;
Each of the storage units is provided to restrict the entry and exit of the fish to and from each of the storage units, so that a period in which the fish can enter and exit and a period in which the fish cannot enter and exit are alternately generated in time. Controlled doors,
In each of the storage units, a camera that photographs the fish stored in the storage units,
An apparatus for photographing fish, comprising: A counting system for fish passing through the fishway,
A plurality of housing portions for housing fish are provided around the rotation axis, and when the rotation is performed around the rotation shaft, the fish passage is blocked in order by each of the adjacent housing portions, and the fish path is swam in the housing portion. A columnar rotator that is positioned to accommodate the fish to be installed and installed in the fishway;
Each of the storage units is provided to restrict the entry and exit of the fish to and from each of the storage units, so that a period in which the fish can enter and exit and a period in which the fish cannot enter and exit are alternately generated in time. Controlled doors,
In each of the storage units, a camera that photographs the fish stored in the storage units,
The CPU has a CPU and a memory, and is realized by the CPU executing a program stored in the memory. A video analysis unit that counts the fish in each of the storage units, and the number of fish counted by the video analysis unit for each camera is calculated to store the number of fish that pass through the fishway for each predetermined period. A computer comprising a counting information generating unit,
A fish counting system comprising: A fish counting system according to claim 3,
The video analysis unit is configured to perform at least one of image addition, inter-image calculation, binarization, and area calculation on the video signal output from the camera, and the video signal is output from the camera. A fish counting system characterized by counting fish.

Images