JPH03163358A - Image monitoring apparatus of fish - Google Patents

Abstract

PURPOSE:To make it possible to introduce image recognizing technology readily without changing the structure of an existing water tank by forming a monitoring water tank having the space of a region wherein image is picked up in recognition of the behavior of fish, and providing the monitoring tank in a breeding water tank. CONSTITUTION:The side surface of a monitoring water tank (can be attached and removed readily) 11 which is provided in a breeding water tank 10 is made to be a metal net or a porous plate (passes water to be inspected but does not pass fish). Fishes 15A - 15C (15) are put into a space position between both side surfaces. The fish 15 is illuminated with a lighting device 16. A semitransparent plate 17 is provided between the device 16 and the water tank 10. An image sensing device (ITC camera) 20 picks up the image of the light from the device 16 through the plate 17. The image of the fish 15 in the water tank 11 is picked up with the device 20. The signal from the device 20 is guided into an image processing device 30, and the image of the fish 15 is recognized. An alarm device 40 evaluates the behavior of the fish 15 based on the obtain image of the fish 15. When the abnormality is found, an alarm is issued. A monitor TV 50 displays the photographed image, the result of the image recognition and the result of the evaluation of the moving state of the fish 15.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to image monitoring in fish behavior monitoring for detecting abnormalities in water quality of inflow water and treated water of water treatment plants, sewage treatment plants, and river water. Regarding the aquarium.

[Conventional technology]

At water treatment plants, in order to determine whether or not toxic substances have been mixed into the raw water, a portion of the raw water is channeled into an aquarium where aquatic animals such as crucian carp, carp, dace, tanager, Haya, and Oikawa are raised. That is, when a poisonous substance is mixed into the raw water, the above-mentioned phenomenon in which fish behave abnormally or die is used to monitor the inflow of the poisonous substance into the raw water. In addition, sewage treatment plants need to know whether legally prohibited toxic substances have entered the incoming sewage, so they rely on intermittent manual water quality analysis. Similarly, treated water from water treatment plants and sewage treatment plants, as well as river water, needs to be monitored for the presence of toxic substances in the water.

Water temperature, turbidity, +P using industrial instruments to measure the quality of raw water
H*Electrical conductivity etc. are continuously measured.

However, chemical analysis is relied on to detect toxic substances mixed into raw water, but there are many types to be detected, and measurement is extremely difficult in terms of time and economy.

As described above, monitoring of toxic substances in water currently relies on human visual inspection and complicated manual analysis. For this reason, there was a drawback that continuous monitoring and early detection were not possible.

The method for monitoring fish is to detect the fish in the tank from the top of the tank using an industrial television camera (ITV) and process the image (
Literature: 36th National Water Supply Research Presentation,! J performance collection P464
~466) have been devised.

In this method, fish are illuminated from the top of the aquarium, and images are similarly taken from the top.

However, this method cannot detect abnormal behavior of fish until it rises to the surface of the water, so it is difficult to detect abnormal behavior of fish at an early stage.

Japanese Unexamined Patent Publication No. 61-46294 discloses a method of monitoring behavioral patterns of a plurality of living things in order to monitor water quality. The disclosed technology uses a water quality sensor to measure temperature and water quality, and uses the measured values as a reference to determine whether behavioral patterns are normal or not.
Determining abnormalities is described. It is stated that behavioral patterns include speed and position. However, even if we simply analyze behavioral patterns using image technology, such a concept is conventionally known, and there is no way to specifically detect or evaluate the speed and position of multiple living things. There is no disclosure as to whether this will be done, so it is difficult to implement it.

Furthermore, in conventional monitoring methods, the details of the water tank for image monitoring are not described or considered.

[Problem to be solved by the invention]

The above conventional technology detects fish in a breeding tank using an industrial camera, and determines that there is an abnormality when the fish surfaces, but the details of the configuration of the tank for imaging are unknown, and how to capture images There was a problem in incorporating monitoring into the existing aquarium.

An object of the present invention is to easily incorporate image monitoring technology into existing aquariums.

[Means to solve the problem]

In order to achieve the above object, the present invention creates a monitoring aquarium that has an area space where images can be taken for image recognition of fish behavior, and is installed in an existing breeding aquarium.

[Effect]

Since the above means is provided, the image recognition technology can be easily introduced to places equipped with fish breeding tanks, such as water purification plants, without changing the existing tank structure.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. The structure of the embodiment will be explained using Fig. 1. Reference numeral 10 denotes an existing breeding aquarium, to which water is supplied by a water supply pipe 12 and a water supply pump 13. The breeding tank 10 contains a monitoring tank l1. The water introduced into the water tank 10 is drained through a drain pipe 14. The side surface of the monitoring tank 11 (the side where the water comes out) is made of wire mesh, a perforated plate, etc., so that the water to be tested can flow through the monitoring tank 11. At this spatial position on both sides, fish 15A, 15
Insert B and 15C. The lighting device 16 illuminates the fish 15A-15C in the monitoring tank 11. A semi-transparent plate 17 is provided between the lighting device 16 and the aquarium 10.

An imaging device 20 such as an industrial television camera is arranged on the opposite side of the monitoring water tank 11 when viewed from the lighting device 16.

That is, the imaging device 20 is connected to the semi-transparent plate l from the illumination device l6.
The light obtained through 7 is imaged. Here, the imaging device 20 images the fish in the monitoring tank. The signal from the imaging device 20 is guided to an image processing/processing device 30 to image-recognize the fish. The alarm device 1i40 evaluates the behavior of the fish from the image of the fish obtained by the image processing device 30, and issues an alarm in case of abnormality. The monitor television 50 displays captured images, image recognition results, and evaluation results of fish movement status.

Next, the details and operation of the Kaikai will be explained below.

The water supply pump 13 samples the water to be tested and connects it to the water supply pipe l2.
The water is supplied to the breeding tank 10 by the following. In water treatment plants, the water to be tested is rivers, lakes, and water within the water treatment plant, in sewage treatment plants, it is inflow sewage or treated water, and in the case of monitoring toxic substances in rivers, it is river water. The water in the breeding aquarium 10 is drained through a drain pipe 14. The side surface of the monitoring tank 11 through which the water to be tested flows is made of a wire mesh or perforated plate structure that allows water to pass through but does not allow fish to pass through.

Next, details of the monitoring water tank 11 will be explained with reference to FIG. The imaging front side 11a and the illumination side 1lb are made of transparent glass,
The llc and lid of the water flow side plate to be tested, such as acrylic, is a wire mesh or perforated plate through which fish cannot pass. Also, the upper surface 1
The material of 1e and the lower surface 11f is not particularly limited, and any material may be used as long as it has enough strength to maintain the structure of the water tank. In addition, the upper surface ↓↓e has a structure in which sushi can be freely taken out so that fish can be put in and taken out, and lle may be omitted depending on the case.

Furthermore, the installation and removal of the monitoring tank (1) shall be made easy. The monitoring tank 11 as described above is installed in a breeding tank.

The illumination device 16 and the imaging device 20 are arranged in opposite directions with the breeding tank in between. A semi-transparent plate 17 made of a semi-transparent substance is provided between the lighting device 6 and the breeding tank 10. The light emitted from the entire semi-transparent plate 17 illuminates the monitoring aquarium 11, and the transmitted light is detected by the imaging device 20. Light passes through the water area and is detected with bright brightness, while fish 15A~
15G does not transmit light, so it can be recognized with low brightness.

Imaging is performed by sequentially scanning the area between the side panels 11c and 1d of the monitoring tank ↓↓ in the horizontal and vertical directions using an imaging device 20 such as an industrial television camera (IVT), and capturing each point. The brightness of the image is sequentially converted into an electrical signal. That is, the image of this area is finely divided vertically and horizontally, and the brightness of each divided pixel is converted into electric signals 9 with different output voltages depending on the degree of brightness. The electrical signal output from the imaging device 20 is an analog signal such as voltage. Electrical signals output from the imaging device 20 are transmitted to the image processing device 30. Image processing device 30
are fish 15A~ based on the image of the area obtained by the imaging device 20.
15C is image recognized, and the movement distribution of fish 15A to 15C is detected based on the recognition result. The alarm device 40 uses image processing'! The behavior of the fish 15A to 15G obtained at A station 30 is evaluated and an alarm is issued in case of abnormality. Furthermore, the monitor television 60 displays captured images, image recognition results, and evaluation results of the moving speed and position distribution of fish.

In the above-described image monitoring of fish, by preparing a monitoring tank, the behavior of fish in an existing breeding tank can be easily image-monitored.

<Other Example 1> Another Example 1 is shown in FIG. In this embodiment, the rearing tank 60 is considerably larger than the monitoring tank 1l. The monitoring tank 1l is installed in the test water filled with the breeding tank 60. In this case, the lighting device 18 is waterproof and placed in water. As explained in FIG. 1, the light passing through the semi-transparent plate 17 is detected by the imaging device 20. Third
Although the imaging device 20 in the figure is installed outside the breeding aquarium 60, depending on the situation, the imaging device may be made waterproof and installed underwater. For image monitoring, first, scoop up a plurality of fish bred in the breeding tank 60 and transfer them to the monitoring tank l1, then install the monitoring tank ↓l in the breeding tank 60, and monitor the behavior of the fish 15A to 15C. image monitoring. The structure of the monitoring water tank may be the same as that explained in FIG. 2, and furthermore, the entire water tank may be made of a porous material in order to improve the flow of the test water. Note that the aquarium described here has the same function in large-scale ponds, swamps, lakes, and sea areas where fish are cultivated.

<Other Example 2> Another Example 2 is shown in FIG. In this embodiment, the breeding tank is relatively small. By simply installing a side perforated plate 11c and a lid having the same structure as the side perforated plate 11c and lid of the monitoring aquarium explained in FIG. 2 and partitioning a certain area of the rearing aquarium, the area range becomes a monitoring aquarium.

〔Effect of the invention〕

According to the present invention, by installing a monitoring tank in an existing breeding tank, fish behavior can be easily image monitored without changing the structure of the existing breeding tank or installing a new tank. can.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of one embodiment of the present invention, FIG. 2 is an explanatory diagram of a water tank of the embodiment, and FIGS. 3 and 4 are explanatory diagrams of other embodiments of the present invention. IO...breeding tank, 11...monitoring tank, 15...
Fish, Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A breeding tank through which test water flows, fish kept in the breeding tank, an imaging device that converts image information of the fish into electrical signals, and lighting for capturing images of the fish. a device;
A fish image monitoring device including an image processing device for image recognition of the fish from image information obtained from the imaging device, characterized in that a monitoring tank for capturing images of the behavior of the fish is provided in the breeding tank. An image monitoring device for fish. 2. The image monitoring device for fish according to claim 1, wherein the installation work of attaching and detaching the monitoring tank to the rearing tank can be easily performed. 3. The image monitoring device for fish according to claim 1, wherein the monitoring aquarium, the lighting device, and the imaging device are installed in the water to be inspected. 4. The image monitoring device for fish according to claim 1, wherein a porous partition plate is installed in the breeding aquarium so as to have an area space, and the area space is used as the monitoring aquarium.