WO2011055698A1 - 魚卵熟度判定装置及び魚卵熟度判定方法 - Google Patents
魚卵熟度判定装置及び魚卵熟度判定方法 Download PDFInfo
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- WO2011055698A1 WO2011055698A1 PCT/JP2010/069411 JP2010069411W WO2011055698A1 WO 2011055698 A1 WO2011055698 A1 WO 2011055698A1 JP 2010069411 W JP2010069411 W JP 2010069411W WO 2011055698 A1 WO2011055698 A1 WO 2011055698A1
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- light
- egg
- fish
- fish egg
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- 229920006395 saturated elastomer Polymers 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C17/00—Other devices for processing meat or bones
- A22C17/0073—Other devices for processing meat or bones using visual recognition, X-rays, ultrasounds, or other contactless means to determine quality or size of portioned meat
-
- A—HUMAN NECESSITIES
- A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
- A22C—PROCESSING MEAT, POULTRY, OR FISH
- A22C25/00—Processing fish ; Curing of fish; Stunning of fish by electric current; Investigating fish by optical means
- A22C25/04—Sorting fish; Separating ice from fish packed in ice
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/12—Meat; Fish
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/845—Objects on a conveyor
Definitions
- the present invention relates to a fish egg maturity determination apparatus and a fish egg maturity determination method for determining the maturity of a fish egg taken out from a fish body.
- Tartako frozen sukeko, which is the raw material of Mentaiko, is the ovary of Suketsudara.
- the main fishing grounds of the assistant sect are the northern fishing grounds around the Kamchatka Peninsula in Alaska, USA, and Russia, both of which are frozen on land on a remote island or on a ship.
- the conventional method for producing frozen scales is, for example, as described in (1) to (4) below.
- Graded skeletons are frozen with a specified weight and packed into a product.
- step (4) grading is performed based on the following selection criteria (a) to (d).
- Patent Document 1 discloses a technique for a fish processing apparatus that extracts fish eggs and the like from the fish body.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a fish egg maturity determination apparatus and a fish egg maturity determination method that can uniformly determine the maturity of fish eggs. It is to be.
- the fish egg maturity determination device of the present invention that solves the above problems includes a mounting unit on which the fish egg is mounted, a light irradiation unit that irradiates light on the fish egg mounted on the mounting unit, It has an image pickup means for picking up an image in which light emitted from the light irradiation means is transmitted through the fish egg, and a determination means for determining the maturity of the fish egg based on the picked-up image picked up by the image pickup means. It is a feature.
- the image of the light emitted from the light irradiation means is transmitted through the fish egg, and the maturity of the fish egg is determined based on the captured image. A uniform determination result can always be obtained. Therefore, the quality of the fish egg can be stabilized.
- the fish egg maturity determination apparatus of the present invention preferably creates a fish egg image obtained by performing image processing on the captured image and extracting an image including at least a part of the fish egg from the captured image, and the created fish egg
- the fish egg maturity determination device of the present invention is characterized in that the light transmission value is at least one of lightness, saturation, and hue.
- the image processing means calculates an average value of the light transmission values of the light transmitting through the predetermined area range of the fish eggs based on the fish egg image, and the determination means sets the average value of the light transmission values. It is good also as a structure which determines the maturity of a fish egg based on.
- the determination means may compare the average value with a preset threshold value and determine whether the fish egg is a mature egg or an overripe egg based on the comparison result. Further, preferably, when the average value of the light transmission value is lower than the threshold value, it is determined that the fish egg is a mature egg, and when the average value of the light transmission value is equal to or greater than the threshold value, the fish egg is an overripe egg. It is good also as a structure to determine.
- the determination means may determine which of a plurality of preset maturity ranks corresponds to the average value and determine the maturity of the fish egg based on the determination result. And preferably, it is good also as a structure which determines the maturity of the said fish egg using three types of maturity ranks, an immature egg rank, a complete ripe egg rank, and an overripe egg rank as several maturity ranks. Preferably, it is determined whether the average value corresponds to the light transmission value region corresponding to each of the immature egg rank, the mature egg rank, and the overripe egg rank, and the fish egg is an immature egg based on the determination result. It is good also as a structure which determines whether it is a mature egg or an overripe egg.
- the mounting portion is configured by a plate-like member made of a light-transmitting material, and the light irradiation means is from either one of the upper side and the lower side of the mounting portion. It is good also as a structure which irradiates light and an imaging means images from the other side of a mounting part. More preferably, the light irradiating means is disposed below the placement unit, the light can be emitted to the fish eggs through the placement unit, and the imaging means is disposed above the placement unit. It is good.
- the fish egg maturity determination device of the present invention is preferably characterized in that the imaging means captures a color image as an image.
- the fish egg maturity determination method of the present invention that solves the above-described problem is that the fish egg is placed on the placing portion, the light is irradiated from the light irradiation means to the fish egg, and the light irradiation means is irradiated.
- An image in which light is transmitted through the fish egg is captured by the image capturing means, the captured image captured by the image capturing means is subjected to image processing, a light transmission value of the light transmitted through the fish egg is measured, and the measured light transmission It is characterized by determining the maturity of the fish egg based on the value.
- the fish egg maturity determination apparatus of the present invention irradiates fish eggs with light from the lower side of the fish eggs, images an image in which the irradiated light is transmitted through the fish eggs, from the upper side of the fish eggs, and A fish egg maturity determination device that determines the maturity of a fish egg based on the captured image, and a mounting tray made of a light-transmitting material on which the fish egg is mounted, and a lower part of the mounting tray
- a conveying means that moves horizontally and conveys the mounting tray, and is interposed between the conveying means and the mounting tray, supports the mounting tray above the conveying means, and between the conveying means and the mounting tray.
- a supporting means for forming a space portion that communicates with the loading tray in the conveying direction and is open on one side in the lateral direction with respect to the conveying direction, and is mounted at a height position between the conveying means and the loading tray. It is arranged so that it can pass through the space by protruding from one side in the horizontal direction to the other side in the horizontal direction. It is characterized by having a light irradiating means for irradiating light toward.
- a space portion is formed between the conveying means and the mounting tray so as to communicate with the mounting tray in the conveying direction and open on one side in the lateral direction by the supporting means.
- the light irradiating means is arranged so as to protrude from one side in the horizontal direction of the tray to the other side in the horizontal direction at a height position between the conveying means and the mounting tray so as to be able to pass through the space portion. Therefore, when the mounting tray has been transported by the transporting means, the light irradiating means can be passed through the space portion, and at that time, the light is directly directed from the lower side of the mounting tray toward the mounting tray. Can be irradiated.
- the distance from the light irradiation means to the fish eggs on the mounting tray can be shortened, and the fish eggs placed on the mounting tray can be irradiated with a sufficient amount of light and transmitted. Can be made. Therefore, an image in which the light emitted from the light irradiation means is transmitted through the fish egg can be easily captured, and the maturity of the fish egg can be determined based on the captured image.
- the supporting unit tilts the mounting tray in the lateral direction
- the conveying unit is configured to move the mounting unit from the mounting posture in which the fish egg can be mounted on the mounting tray. It is characterized by having a tilting means capable of changing the posture of the mounting tray to a discharge posture state of discharging to the side.
- the light irradiation means can be disposed below the mounting tray.
- Light can be irradiated directly from below the placement tray toward the placement tray. Accordingly, the distance from the light irradiation means to the fish eggs on the mounting tray can be shortened, and the fish eggs placed on the mounting tray can be irradiated with a sufficient amount of light and transmitted. Can be made. Therefore, an image in which the light emitted from the light irradiation means is transmitted through the fish egg can be easily captured, and the maturity of the fish egg can be determined based on the captured image.
- the light irradiation means includes a light source, a light emitting unit that emits light by receiving light from the light source, and an optical fiber cable that propagates light from the light source to the light emitting unit. It is characterized by that.
- light can be propagated from the light source to the light emitting part by the optical fiber cable, so that the light source can be provided at a position away from the light emitting part. Therefore, the heat of the light source can be prevented from being transmitted to the mounting tray and the fish eggs on the mounting tray.
- the fish egg maturity determination device of the present invention is preferably characterized in that the light source of the light irradiation means is arranged at a position higher than the mounting tray. According to the fish egg maturity determination apparatus of the present invention, since the light source of the light irradiation means is arranged at a position higher than the mounting tray, the moisture of the fish egg is prevented from adhering to the light source, and the power source for the light source Can be prevented from short-circuiting.
- the fish egg maturity determination device and the fish egg maturity determination method of the present invention since the maturity of the fish egg is determined based on an image in which light is transmitted through the fish egg, the determination result is always uniform. Can be obtained. Therefore, the quality of the fish egg can be stabilized.
- FIG. 4 is a diagram for explaining the contents of image processing in the first embodiment.
- FIG. 6 is a diagram for explaining the contents of image processing in a second embodiment. Table showing experimental data.
- FIG. 1 is a schematic diagram showing the configuration of a fish egg sorting apparatus equipped with a fish egg maturity determination apparatus of the present invention.
- the fish egg sorting apparatus 1 has a transport line 2 such as a conveyor, for example, and in order from the upstream side along the transport line 2, an input unit 3, a class determination unit 4, and a discharge sorter. Part 5 is provided.
- the transport line 2 includes mounting trays (mounting units) 6 that are continuously spaced in the transport direction F by a predetermined distance.
- the mounting tray 6 is configured by a plate-like member made of a light-transmitting material such as synthetic resin, and has a flat dish shape on which the scales W can be placed side by side.
- the transport line 2 is configured to continuously transport the mounting tray 6 on which the scale W is placed toward the downstream side in the transport direction F.
- the scale W is loaded into the transfer line 2.
- the scale W is placed on the placement tray 6 by the worker M manually.
- the grade discriminating unit 4 performs a process for discriminating the grade of the scale W.
- the grade is determined based on preset criteria such as the shape, color, maturity, and weight of the scale W. And the maturity which is one of the requirements for discriminating the grade is determined using the fish egg maturity determination device 10 of the present invention.
- the discharge sorting unit 5 performs a sorting process for sorting and discharging the scale W based on the discrimination result of the grade discrimination unit 4.
- a plurality of discharge trays 7 are arranged side by side along the transport line 2, and when the mounting tray 6 on which the scale W is loaded is transported to the position of the discharge tray 7 of the corresponding grade.
- the mounting tray 6 is tilted from the mounting posture state to the discharging posture state, and the scale W is discharged from the mounting tray 6 to the discharging tray 7.
- FIG. 2 is a diagram for explaining the configuration of the fish egg maturity determination device of the present invention
- FIG. 3 is a functional block diagram of the fish egg maturity determination device.
- the fish egg maturity determination apparatus 10 includes a light irradiation unit 11 that irradiates light on the scale W placed on the mounting tray 6, and an image in which light emitted from the light irradiation unit 11 passes through the scale W.
- the light irradiation means 11 includes a light source 11a made of, for example, a halogen lamp. As shown in FIG. 2, the light source 11 a is disposed below the mounting tray 6, and its direction is set so as to irradiate light upward. As the light source 11a, a light source having a capacity capable of irradiating with a light amount of light passing through the mounting tray 6 and the scale W is used. The light source 11a is not limited to a halogen lamp as long as it can illuminate the entire scale W on the mounting tray 6 with no unevenness and uniform brightness.
- the image pickup means 12 has a CCD camera 12a capable of picking up a color image.
- the CCD camera 12a is disposed above the mounting tray 6 and at a position facing the light source 11a.
- the CCD camera 12a has a focus, a diaphragm, and an aperture so as to capture the scale W on the mounting tray 6 from above the mounting tray 6.
- Various settings such as shutter speed are set appropriately. Then, when the scale W is placed on the mounting tray 6 and conveyed, an image in which the light irradiated from the light source 11a of the light irradiation means 11 is transmitted through the mounting tray 6 through the mounting tray 6 is displayed. An image can be taken.
- the computing means 13 is composed of a combination of hardware such as a computer and a software program, for example, and by executing the software program on the hardware, as an internal function of the computing means 13, as shown in FIG.
- the image processing means 14 and the determination means 15 are embodied.
- the image processing unit 14 performs image processing on the captured image to create a fish egg image in which only the image of the scale W is extracted from the captured image, and the light transmission value of light transmitted through the scale W based on the created fish egg image. Process to measure. In the image processing device 14, an average value of light transmission values that pass through a predetermined area range is calculated.
- FIG. 4 is a diagram for explaining an example of the contents of image processing by the image processing means.
- an empty loading tray 6 on which no scale W is previously loaded is imaged by the imaging means 12 and stored as a base image Pb of the loading tray 6 in a storage means (not shown) of the computing means 13. (See FIG. 4 (a)).
- light is irradiated from the light irradiation means 11 and an image of the state where the light from the light source 11 a is transmitted through the mounting tray 6 is captured.
- the image processing unit 14 performs image processing for subtracting the base image Pb of the mounting tray 6 from the captured image Pa (see FIG. 4C), and extracts the fish W image from the captured image Pa.
- An egg image Pc is created (see FIG. 4D).
- the process which measures the light transmission value of the light which has transmitted the scale W based on the fish egg image Pc is performed.
- the maturity of Sukeko W has traditionally been determined by its appearance. Therefore, in order to match the appearance, the light transmission value of the light transmitted through the predetermined area range of the scale W is obtained.
- a predetermined area range of the scale W for example, a lightness density value of the fish egg image Pc is searched in order to calculate a light transmission value of light passing through the entire scale W (see FIG. 4E). Then, a histogram of lightness density values is created, and the average in the histogram is calculated as the average value of the light transmission values.
- FIG. 5 and FIG. 6 are histograms showing the results of searching for the brightness density value of the scale
- FIG. 5 is a histogram of the fully matured scale
- FIG. 6 is a histogram of the matured scale.
- Sukuko W has a low lightness density value when it is fully matured because it contains less water. Therefore, as shown in FIG. 5, the average density value is low. On the other hand, in the case of over-ripening, since the inside is watery, the lightness density value becomes large. Therefore, as shown in FIG. 6, the average value of the density values becomes high.
- the light transmission value is described as an example of the brightness value (0 to 255 gradations), but the light transmission value is not limited to the brightness value. For example, at least one of brightness, saturation, and hue can be used as the light transmission value.
- the determination unit 15 determines the maturity of the scale W based on the light transmission value measured by the image processing unit 14, and more specifically, compares the average value of the light transmission value with a preset threshold value, Based on the comparison result, it is determined whether the scale W is a mature egg or an overripe egg. Specifically, when the average value is lower than the threshold value, it is determined that the scale W is fully matured, and when the average value is equal to or greater than the threshold value, it is determined that it is overripe.
- the threshold value can be arbitrarily set.
- the determination unit 15 determines which of the plurality of preset maturity ranks corresponds to the average value of the light transmission values, and determines the maturity of the scale W based on the determination result.
- the maturity level of the scale W may be determined using three types of maturity ranks: an immature egg rank, a fully-ripened egg rank, and an overripe egg rank. Which of the light transmission value areas set in advance corresponding to the immature egg rank, the mature egg rank, and the overripe egg rank is determined as to whether the average value of the light transmission value corresponds, and based on the determination result It is good also as a structure which determines whether sukeko W is an immature egg, a mature egg, and an overripe egg.
- an image in which the light emitted from the light irradiation unit 11 is transmitted through the scale W is captured to obtain the captured image Pa, and the scale is based on the captured image Pa. Since the maturity level of W is determined, a uniform determination result can always be obtained. Therefore, the quality of the scale W can be stabilized.
- the maturity is determined using the average value of the light transmission values of light transmitted through the predetermined area range of the scale W, it is possible to match the determination result with the actual appearance determination (appearance determination). The determination result without any sense of incongruity can be obtained.
- the sorting operation of the scale W can be fully automated from a manual operation to a mechanical device. Therefore, labor saving can be achieved, it is not necessary to secure the personnel of the workers, and the labor cost can be reduced.
- Example 2 will be described below with reference to FIG.
- the case where the light transmission amount of the light transmitted through the entire scale W is calculated when calculating the light transmission amount of the light transmitted through the predetermined area range of the scale W is described as an example.
- the second embodiment is characterized in that the amount of light transmitted through at least part of the scale W is calculated.
- an image of a predetermined area S in a predetermined range is picked up by the image pickup means 12 and stored as a base image Pe in the storage means ( (See FIG. 7A).
- the range of the region S is set so that at least a part of the scale W is arranged when the scale W is placed on the placement tray 6.
- the center position is set.
- the imaging unit 12 captures an image of the region S in which the light emitted from the unit 11 is transmitted through the scale W.
- the image processing unit 14 obtains a captured image Pf of the region S imaged by the imaging unit 12, and performs image processing for subtracting the base image Pe of the mounting tray 6 that is saturated in white from the captured image Pf (see FIG. 7 (c)), only the partial image Pd of the scale W is cut out from the captured image Pf of the region S.
- the image processing range can be narrowed and the amount of image processing information can be reduced as compared with the first embodiment in which the entire scale W is subjected to image processing. Therefore, the processing speed can be increased and the cycle time can be shortened. Further, since the light transmission value is measured only in the desired region S, for example, the influence of the bright and dark portions formed by the ribs of the mounting tray 6 can be eliminated, and the light transmission value of the scale W itself can be accurately determined. Can be measured.
- FIGS. 8 and 9 are diagrams showing experimental data of ripe and overripe scales
- FIG. 8 is a comparison table of experimental data
- FIG. 9 is a graph showing the experimental data of FIG.
- the light transmission value was measured with the fish egg maturity determination device of the present invention.
- the light transmission value showed a value around 120 for the fully matured scale, and the value around 60 for the matured scale.
- the light transmission value has a difference of about 2 times between the fully matured scale and the over matured scale.
- the difference between the fully matured scale and the over matured scale clearly appears. . Therefore, it can be seen that the maturity of the scale can be clearly determined based on the light transmission value.
- the present invention is not limited to the contents of the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.
- the case where the placement unit is the placement tray 6 has been described as an example, but a conveyance belt of a belt conveyor may be used.
- a color CCD capable of capturing a color image is used as an example of the image capturing unit.
- a camera capable of capturing a monochrome image may be used.
- the transmitted color can be detected by the three sides of RGB, and various algorithms can be added as options.
- the cost of the imaging means can be reduced, the amount of information can be reduced as compared with color images, image processing and determination processing can be facilitated, and processing speed can be improved. Can be planned.
- FIG. 10 is a diagram illustrating the configuration of the fish egg maturity determination apparatus according to the third embodiment. Note that the same components as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
- the fish egg maturity determination device 10 irradiates the scale W with light from the lower side of the scale W, and an image in which the irradiated light is transmitted through the scale W.
- the image is picked up from the upper side of the scale W and the maturity of the scale W is determined based on the picked-up image.
- the loading tray 6, the transport means 21, the support means 31, and the light irradiation means 11 are provided. is doing.
- the transport means 21 is provided along the transport line 2 (see FIG. 1), and has a configuration that moves horizontally below the mounting tray 6 to transport the mounting tray 6. As shown in FIG. 10, the transport means 21 has a chain conveyor 22 in this embodiment.
- the chain conveyor 22 is supported so as to be guided by a guide member 23 between a pair of left and right rails 24 laid on the line table 2a of the transport line 2, and is rotationally driven by a drive motor (not shown). It moves in the transport direction of the mounting tray 6 along the upper surface of the line table 2a.
- the support unit 31 is interposed between the transport unit 21 and the mounting tray 6, supports the mounting tray 6 above the transport unit 21, and mounts between the transport unit 21 and the mounting tray 6.
- a space S is formed so as to communicate with the tray 6 in the transport direction and open on one side in the lateral direction (left side in FIG. 10).
- the support means 31 tilts the mounting tray 6 in the lateral direction, and a mounting posture state (see FIG. 10) in which a skeletal (fish egg) W can be mounted on the mounting tray 6.
- a tilting means 32 capable of changing the posture of the mounting tray 6 from a state shown by a solid line) to a discharge posture state (state shown by an imaginary line in FIG. 10) for discharging to the side of the conveying means 21.
- the tilting means 32 is connected to the chain conveyor 22 and slidably moved on the rail 24.
- the tilting means 32 swings to the left and right above the base 33 with the same direction as the transport direction of the loading tray 6 as the rotation axis.
- the movable portion 34 that is movably supported and the movable portion 34 swings with respect to the base 33 so that the posture state of the placement tray 6 can be selectively changed to either the placement posture state or the discharge posture state.
- positioning means 35 for positioning.
- the support means 31 has support leg portions 36 for supporting the mounting tray 6 above the tilting means 32.
- the support leg portion 36 is interposed between the movable portion 34 of the tilting means 32 and the mounting tray 6 and is provided so as to be positioned on the other side in the lateral direction (right side in FIG. 10) with respect to the transport direction.
- a space S is formed between the upper part of the tilting means 32 and the lower part of the mounting tray 6.
- the light irradiation means 11 is disposed so as to protrude from the one side in the horizontal direction of the mounting tray 6 toward the other side in the horizontal direction at a height position between the conveying means 21 and the mounting tray 6 so as to pass through the space S. , The light is irradiated upward.
- the light irradiation means 11 includes a light source 41 such as a halogen lamp, a light emitting unit 43 that emits light upon receiving light from the light source 41, and an optical fiber cable 42 that propagates light from the light source 41 to the light emitting unit.
- the light emitting portion 43 is supported at the height position between the tilting means 32 and the mounting tray 6 on the one side in the lateral direction with respect to the conveying means 21. And it protrudes horizontally toward the other side in the lateral direction, and is arranged so that the top surface of the tip part faces the lower surface of the loading tray 6. A light emitting surface is formed on the top surface of the tip portion, and light is irradiated upward.
- the light source 41 is provided at a position away from the light emitter main body 43 in order to prevent the heat of the light source from being transmitted to the mounting tray 6 and the scale W. In order to prevent the moisture of the scale W from dripping from the mounting tray 6 and causing the power source for the light source to be short-circuited, it is disposed at a height position above the mounting tray 6.
- an imaging unit 12 (see FIG. 2) is provided above the light emitting unit 43, and light irradiated from the light irradiation unit 11 passes through the mounting tray 6. Furthermore, an image that is transmitted through the scale W on the loading tray 6 can be captured.
- the configuration for determining the degree of maturity of the scale W based on the captured image is the same as in the first and second embodiments, and a detailed description thereof will be omitted.
- the supporting means 31 communicates between the conveying means 21 and the loading tray 6 in the conveying direction of the loading tray 6 and A space S is formed in which one side in the horizontal direction is open, and the light irradiation means 11 projects from one side of the tray toward the other side in the horizontal direction at a height position between the transport means 21 and the loading tray 6. It is arranged so that it can pass through the space portion S.
- the light irradiation means 11 can be passed through the space S, and at that time, from below the mounting tray 6 toward the mounting tray 6.
- the light can be directly irradiated, the light can be transmitted through the mounting tray 6, and the light can be transmitted through the scale W on the mounting tray 6. Therefore, an image in which the light emitted from the light irradiation means 11 is transmitted through the scale W can be captured, and the maturity of the scale W can be determined based on the captured image.
- the belt is made of a light-transmitting material, and light irradiation means is provided below the belt to irradiate light upward.
- light irradiation means is provided below the belt to irradiate light upward.
- the light irradiation means in the case of an apparatus that transports the scale W on the mounting tray, it is necessary to support the mounting tray on the transporting means. Therefore, in order to irradiate light from below the scale W, the light irradiation means must be disposed below the transport means, and the distance from the light irradiation means to the scale W becomes long, and the light is irradiated from the light irradiation means. There is a problem in that the light is attenuated until it reaches the scale W and the light intensity becomes weak. Therefore, it is necessary to use a light irradiation means with higher intensity, and the equipment cost increases, and the price of the apparatus cannot be reduced.
- the tilting means when the tilting means is interposed between the transport means and the mounting tray, the tilting means impedes the transmission of light, and the light irradiated from the light irradiation means can no longer reach the scale W. It was difficult.
- the fish egg maturity determination apparatus 10 of the present invention extends between the conveying means 21 and the mounting tray 6 in the conveying direction of the mounting tray 6 by the support leg portion 36 of the supporting means 31.
- a space portion S that is communicated and opened on one side in the lateral direction is formed, and when the loading tray 6 has been transported, the space portion S has a configuration that allows light irradiation means to pass therethrough. Light can be directly irradiated from below the placement tray 6 toward the placement tray 6.
- the distance from the light irradiation means 11 to the scale W on the mounting tray 6 can be shortened, and a sufficient amount of light can be irradiated to the scale W placed on the mounting tray 6. It is possible to transmit the scale W by light. Therefore, an image in which the light emitted from the light irradiation unit 11 is transmitted through the scale W can be easily captured, and the maturity of the scale W can be determined based on the captured image. Therefore, it is not necessary to increase the light intensity of the light irradiated from the light irradiation means 11, the size of the light source and the power consumption can be suppressed, and the cost can be reduced.
- the light irradiation means 11 includes a light source 41 such as a halogen lamp and a light emitting unit that receives light from the light source 41 via the optical fiber cable 42 and emits light. 43, and the light source 41 is provided at a position away from the light emitting unit 43, so that heat of the light source 41 is prevented from being transferred to the mounting tray 6 and the scale W on the mounting tray 6. be able to. Further, since the light source 41 is disposed at a height above the mounting tray 6, even if the moisture of the scale W hangs down and adheres to the light emitting unit 43, the power source for the light source is short-circuited. Can be prevented.
- a light source 41 such as a halogen lamp and a light emitting unit that receives light from the light source 41 via the optical fiber cable 42 and emits light. 43
- the light source 41 is provided at a position away from the light emitting unit 43, so that heat of the light source 41 is prevented from being transferred to the mounting tray 6 and the scale W on the mounting tray
- the present invention is not limited to the contents of the above-described third embodiment, and various modifications can be made without departing from the spirit of the present invention.
- the case of a chain conveyor has been described as an example of the conveying means 21.
- any means can be used as long as it moves below the loading tray 6 and conveys the loading tray 6.
- Other conveyors may be used.
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Abstract
Description
(b)色:明るい色か、暗い色か、茶色いやけや、胆汁の付着状態
(c)熟度:未熟、完熟、過熟
(d)重量:(a)から(c)までの選別をした上でそれぞれを重量で選別
上記(c)熟度の判定では、作業者が手で触れてスケコの触感を確かめるか、もしくは、目視にてスケコの粒の状態を見極めて判定している。スケコが採れる時期は、1月から4月までの間であり、1月、2月に未熟から完熟のスケコが採れ、3月、4月に完熟から過熟のスケコが採れる。スケコの熟度は、魚体毎に異なり、等級を決定する重要な要素の一つとなる。
2 搬送ライン
3 投入部
4 等級判別部
5 排出仕分け部
6 載置トレー(載置部)
7 排出トレー
10 魚卵熟度判定装置
11 光照射手段
11a 光源
12 撮像手段
12a CCDカメラ
13 演算手段
14 画像処理手段
15 判定手段
Pa 撮像画像
Pb 基画像
Pc 魚卵画像
W スケコ(魚卵)
つぎに、本発明の実施例について図面を用いて説明する。なお、以下の実施例では、魚卵がスケコである場合を例に説明するが、魚卵は、スケコに限定されるものではなく、他のものであってもよい。
次に、実施例2について図7を用いて以下に説明する。
図8、図9は、完熟と過熟のスケコの実験データを示す図であり、図8は、実験データの比較表、図9は、図8の実験データをグラフに表したものである。
次に、本発明の実施例3について図10を用いて説明する。
Claims (17)
- 魚卵が載置される載置部と、
該載置部に載置された前記魚卵に対して光を照射する光照射手段と、
該光照射手段から照射された光が前記魚卵を透過している画像を撮像する撮像手段と、
該撮像手段によって撮像された撮像画像に基づいて前記魚卵の熟度を判定する判定手段と、
を有することを特徴とする魚卵熟度判定装置。 - 前記撮像画像を画像処理して該撮像画像から前記魚卵の少なくとも一部を含む画像を抽出した魚卵画像を作成し、該作成した魚卵画像に基づいて前記魚卵を透過している光の光透過値を測定する画像処理手段を有し、
前記判定手段は、該画像処理手段により測定した光透過値に基づいて前記熟度の判定を行うことを特徴とする請求項1に記載の魚卵熟度判定装置。 - 前記光透過値は、明度、彩度、色相の少なくとも一つであることを特徴とする請求項2に記載の魚卵熟度判定装置。
- 前記画像処理手段は、前記魚卵画像に基づいて前記魚卵の所定の面積範囲内を透過している光の光透過値の平均値を算出し、
前記判定手段は、該画像処理手段によって算出された光透過値の平均値に基づいて前記魚卵の熟度を判定することを特徴とする請求項2または3に記載の魚卵熟度判定装置。 - 前記判定手段は、前記平均値と予め設定された閾値とを比較し、該比較結果に基づいて前記魚卵が完熟卵と過熟卵のいずれであるかを判定することを特徴とする請求項4に記載の魚卵熟度判定装置。
- 前記判定手段は、前記平均値が前記閾値よりも低いときは前記魚卵が完熟卵であると判定し、前記平均値が前記閾値以上のときは前記魚卵が過熟卵であると判定することを特徴とする請求項5に記載の魚卵熟度判定装置。
- 前記判定手段は、予め設定された複数の熟度ランクのいずれに前記平均値が該当するかを判定し、該判定結果に基づいて前記魚卵の熟度を決定することを特徴とする請求項4に記載の魚卵熟度判定装置。
- 前記判定手段は、前記複数の熟度ランクとして、未熟卵ランク、完熟卵ランク、過熟卵ランクの3種類の熟度ランクを用いて、前記魚卵の熟度を判定することを特徴とする請求項7に記載の魚卵熟度判定装置。
- 前記判定手段は、前記未熟卵ランク、完熟卵ランク、過熟卵ランクにそれぞれ対応する光透過値領域のいずれに前記平均値が該当するかを判定し、該判定結果に基づいて前記魚卵が前記未熟卵、完熟卵、過熟卵のいずれであるかを判定することを特徴とする請求項8に記載の魚卵熟度判定装置。
- 前記載置部は、光透過性材料からなる板状部材によって構成され、
前記光照射手段は、前記載置部の上方と下方のいずれか一方側から前記光の照射を行い、
前記撮像手段は、前記載置部の他方側から前記撮像を行うことを特徴とする請求項1から請求項9のいずれか一項に記載の魚卵熟度判定装置。 - 前記光照射手段は、前記載置部の下方に配置され、前記載置部を透過させて前記魚卵に光を照射可能であり、
前記撮像手段は、前記載置部の上方に配置されていることを特徴とする請求項10に記載の魚卵熟度判定装置。 - 前記撮像手段は、前記画像としてカラー画像を撮像することを特徴とする請求項1から請求項11のいずれか一項に記載の魚卵熟度判定装置。
- 載置部の上に魚卵を載置し、
光照射手段から魚卵に対して光を照射し、
前記光照射手段から照射された光が前記魚卵を透過している画像を撮像手段で撮像し、
該撮像手段によって撮像された画像を画像処理して、前記魚卵を透過する光の光透過値を測定し、
該測定した光透過値に基づいて前記魚卵の熟度を判定することを特徴とする魚卵熟度判定方法。 - 魚卵の下側から前記魚卵に光を照射して、該照射した光が前記魚卵を透過している画像を前記魚卵の上側から撮像し、該撮像した撮像画像に基づいて前記魚卵の熟度を判定する魚卵熟度判定装置であって、
前記魚卵が載置される光透過性材料によって構成された載置トレーと、
該載置トレーの下方で水平に移動して前記載置トレーを搬送する搬送手段と、
該搬送手段と前記載置トレーとの間に介在されて、前記搬送手段の上方に前記載置トレーを支持し、前記搬送手段と前記載置トレーとの間に、前記載置トレーの搬送方向に亘って連通しかつ前記搬送方向に対して横方向一方側が開放された空間部を形成する支持手段と、
前記搬送手段と前記載置トレーとの間の高さ位置で前記載置トレーの横方向一方側から横方向他方側に向かって突出して前記空間部を通過可能に配置された光照射手段と、
を有することを特徴とする魚卵熟度判定装置。 - 前記支持手段は、
前記載置トレーを前記横方向に傾動させて、前記魚卵を前記載置トレーの上に載置可能な載置姿勢状態から前記搬送手段の側方に排出する排出姿勢状態に前記載置トレーの姿勢を変更可能な傾動手段を有することを特徴とする請求項14に記載の魚卵熟度判定装置。 - 前記光照射手段は、光源と、該光源から光の供給を受けて発光する発光部と、前記光源から前記発光部に光を伝搬する光ファイバーケーブルとを有していることを特徴とする請求項14又は15に記載の魚卵熟度判定装置。
- 前記光照射手段は、前記光源が前記載置トレーよりも高い位置に配置されていることを特徴とする請求項16に記載の魚卵熟度判定装置。
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