JP2004045072A - Meat identification method and meat identification device - Google Patents

Abstract

An object of the present invention is to provide a meat identification method capable of accurately and surely identifying where a meat is located, and capable of accurately performing an operation of sorting for each part.
Kind Code: A1 A detection light emitted from a detection light irradiation device and a radiation emitted from a radiation irradiation device are irradiated on chicken conveyed by a conveyor, and the chicken is reflected. The reflected light C is captured by the imaging camera 4, and the transmitted image of the radiation D transmitted through the inside of the chicken A is captured by the imaging camera 6. In addition, based on the image information output from the imaging cameras 4 and 6, where the chicken A is located is individually and comprehensively determined by the algorithm of the part determination device 7.
[Selection diagram] Fig. 4

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a meat identification method and a meat identification device used for an operation of identifying a portion of meat such as chicken, pork, and beef.
[0002]
[Prior art]
Conventionally, as a method of sorting the chicken in the above-described example for each part, for example, in a general chicken processing plant, the chicken separated and separated into a plurality of parts is transported while being mixed by one conveyor. At the same time, there is a method in which each part of the chicken conveyed by the conveyer is individually identified and determined visually by an operator, and sorting processing is performed for each part.
[0003]
[Problems to be solved by the invention]
However, when each part of the chicken conveyed by the above-mentioned conveyor is visually identified and determined by an operator, the determination criteria differ depending on the skill of the operator, so that sorting errors may occur, and each chicken It is difficult to sort the parts accurately. Also, since a large number of parts conveyed by the conveyor are manually sorted, the working efficiency is poor and the processing capacity of the operator is limited, so it is difficult to sort a large number of parts continuously. In addition, there is a problem that it takes time and labor to sort each part of the chicken.
[0004]
In view of the above-described problems, the present invention determines where meat is based on the detection information of the internal detection light detection means and the external detection light detection means by using an algorithm of the part determination means, thereby determining where the meat is. It is an object of the present invention to provide a meat identification method and a meat identification device capable of accurately and reliably identifying and judging whether a part is a part.
[0005]
[Means for Solving the Problems]
The present invention irradiates meat with external detection light projected from external detection light irradiation means and internal detection light projected from internal detection light irradiation means, and detects external detection light reflected by the meat on external detection light detection. Means, the internal detection light transmitted through the meat is detected by the internal detection light detection means, and the meat is detected based on the detection information output from the external detection light detection means and the internal detection light detection means. It is a meat identification method and a meat identification device for determining where a part is by an algorithm of a part determination means.
[0006]
The above-mentioned meat is composed of meat such as chicken, pork, and cow, and in the embodiment, chicken drum (Dram), wing (Wing), keel (Keel), rib (Limb), rhino (Sai) and the like. Although it is composed of the parts described above, it may be composed of various parts such as pigs and cows.
[0007]
The external detection light irradiating means can be constituted by a light source (or an illuminating device) that irradiates detection light such as a halogen lamp, a xenon lamp, an ultraviolet lamp, a fluorescent lamp, an incandescent lamp, and the like. Further, the internal detection light irradiating means can be constituted by a radiation generating source which irradiates or generates radiation such as a gas tube, an ion tube, a coolidge tube, a high vacuum tube, and a high voltage tube.
[0008]
Further, the external detection light detection means and the internal detection light detection means can be constituted by, for example, a color or monochrome imaging camera (CCD camera), a digital camera, an image element, or the like. Further, the part determining means can be configured by a part determining device such as a personal computer or a control device including a CPU, a ROM, and a RAM. Further, the transport conveyor can be constituted by, for example, a belt conveyor, a bucket conveyor, a roller conveyor, a chain conveyor, a free tray on which meat is placed, and the like.
[0009]
That is, the meat is irradiated with external detection light projected from the external detection light irradiation means and internal detection light (for example, radiation such as X-rays and soft X-rays) projected from the internal detection light irradiation means, The external detection light reflected by the meat is detected by the external detection light detection means, and the internal detection light transmitted through the meat is detected by the internal detection light detection means. In addition, based on the detection information output from the external detection light detection means and the internal detection light detection means, the position of the meat is individually identified and determined by the algorithm of the part determination means.
[0010]
As an embodiment, the external detection light irradiation unit and the external detection light detection unit, and the internal detection light irradiation unit and the internal detection light detection unit are provided on a conveyor that conveys the meat, and the external detection light irradiation The external detection light emitted from the means and the internal detection light emitted from the internal detection light irradiating means are applied to the meat conveyed by the conveyor, and the external detection light reflected by the meat and the inside of the meat are reflected. A meat identification method can be configured in which the internal detection light transmitted through the meat is detected by the external detection light detection means and the internal detection light detection means while conveying the meat.
[0011]
In addition, the external detection light irradiation unit and the external detection light detection unit, and the internal detection light irradiation unit and the internal detection light detection unit can be provided on a conveyor that conveys the meat. Further, the external detection light irradiation means is constituted by detection light irradiation means for irradiating the meat with detection light, and the external detection light detection means is a reflected light detection means for detecting reflected light reflected by the meat. Can be configured. Further, the internal detection light irradiation means may be constituted by radiation irradiation means for irradiating the meat with radiation, and the internal detection light detection means may be constituted by radiation detection means for detecting radiation transmitted through the meat. Can be.
[0012]
[Action and effect]
According to the present invention, the external detection light reflected by the meat and the internal detection light transmitted through the meat are detected by the internal detection light detection unit and the external detection light detection unit, and the detection information output from each detection unit is detected. On the basis of which part of the meat is determined individually by the algorithm of the part determination means, so that each part of the meat can be identified and determined accurately and reliably, and various kinds of meat can be sorted for each part. The sorting operation can be performed accurately, and the sorting accuracy can be improved and the sorting operation can be labor-saving.
[0013]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawing shows a meat identification method and a meat identification device used for sorting chicken, which is an example of meat, for each part, and in FIG. 1, the meat identification apparatus 1 separates a plurality of parts into pieces. The sorted chicken A is placed on the conveyor 2 and aligned and transported to the first detection section a and the second detection section b set on the transport path, and the chicken A transported to the first detection section a The detection light B emitted from the detection light irradiation device 3 is irradiated, and the reflected light C reflected by the chicken A is imaged by the imaging camera 4. Subsequently, the chicken A conveyed to the second detection section b is irradiated with radiation D (for example, X-rays) emitted from the radiation irradiating device 5, and a transmission image of the radiation D transmitted through the chicken A is formed. An image is taken by the imaging camera 6. In addition, based on the image information output from the imaging cameras 4 and 6, it is an apparatus that determines an area of the chicken A by an algorithm of the area determination apparatus 7.
[0014]
FIG. 2 shows a block diagram of a control circuit of the meat identification device 1. For example, a site determination device 7 composed of a personal computer incorporates a CPU 8, a ROM 9, a RAM 10, and a comparison information storage device 11, and the CPU 8 According to the program stored in the ROM 9, the conveyor 2, the detection light irradiation device 3, the color imaging camera 4, the radiation irradiation device 5, the monochrome imaging camera 6, the image processing device 12, In addition to controlling driving and stopping with the detection sensor 13, a timer for counting elapsed time is built in. The RAM 22 stores data necessary for the detection processing and the measurement processing.
[0015]
The above-described transport conveyor 2 is configured to have a color scheme and a material suitable for imaging the reflected light C reflected by the chicken A, and a material and a structure that allow transmission of the radiation D emitted from the radiation irradiation device 5. Shields external light from the lower part of the transport path. In addition, an address to which the chicken A is moved is set or attached to the placing portion on which the chicken A is placed.
[0016]
A plurality of the above-mentioned detection light irradiation devices 3 are disposed substantially obliquely above the outer surface of the chicken A conveyed to the first measurement section, and have a detection light having a wavelength suitable for detecting a predetermined item outside the chicken A. B is irradiated substantially evenly on the upper outer surface and side outer surface of chicken A.
[0017]
The above-described imaging camera 4 is disposed in the upper part of the transport path facing the upper outer surface and the side outer surface of the chicken A to which the detection light B emitted from the detection light irradiation device 3 is irradiated, and the chicken A is reflected. The reflected light C is captured and output to an image processing device 12 described later. Further, the imaging camera 4 may be disposed substantially directly beside, substantially obliquely upward, substantially obliquely front and rear, etc., with the chicken A transported to the first measurement section as a center.
[0018]
The above-mentioned radiation irradiation device 5 is disposed at the lower part of the transport path (the lower part of the conveyor 2) facing the lower surface of the chicken A transported to the second measurement section, penetrates the inside of the chicken A, and a predetermined item inside the chicken A. Radiation D having a wavelength suitable for detecting the radiation D is emitted from the lower part of the chicken A substantially uniformly from below via the conveyor 2 having a material and structure that allows the transmission of the radiation D.
[0019]
The above-mentioned imaging camera 6 is disposed in the upper part of the conveyance path facing the upper outer surface and the side outer surface of the chicken A through which the radiation D emitted from the radiation irradiating device 5 passes, and the radiation transmitted through the inside of the chicken A D is converted into a light beam having a wavelength that can be optically imaged by a sheet-shaped or plate-shaped phosphor 14 (for example, a scintillator), and a transmitted image of the converted radiation D is imaged. Output to
[0020]
The above-mentioned phosphor 14 is provided between the chicken A conveyed to the second measurement section and the facing surface of the radiation irradiating device 5 arranged above the chicken A, and emits the radiation D transmitted through the inside of the chicken A. The light is converted into light having a wavelength that can be optically imaged by the imaging camera 6. That is, when the radiation D transmitted through the inside of the chicken A is applied to the phosphor 14, the radiation D is converted into a light beam having a wavelength that can be optically imaged by the imaging camera 6 in accordance with the amount of the transmitted radiation D. The whole or a part of the transmitted image of the irradiated chicken A is projected on the upper surface side.
[0021]
The image processing apparatus 12 described above converts image information output from the imaging cameras 4 and 6 into, for example, chicken drum (Dram), chicken wing (Wing), keel (Keel), rib (Limb), rhino (Sai), and the like. Is converted (for example, binarized) into an original image suitable for judging each part and output to the part judging device 7.
[0022]
Further, based on the original image of each part output from the imaging camera 4, for example, as shown in FIG. 3, red 1 (R1), red 2 (R2), yellow 1 (Y1), yellow 2 (Y2), Yellow-green 1 (YG1), yellow-green 2 (YG2), green (G), blue (BR1), blue (BR2), blue (BR3), blue (BR4), white (WH), black (BL), etc. Convert and classify into color information. That is, blood is classified as R1 or R2, meat is classified as R2 or Y1 or Y2, skin and bone are classified as Y2 or YG1 or YG2, and fat is converted and classified as YG1 or YG2.
[0023]
The radiation controller 5a (for example, an X-ray controller) connected to the radiation irradiator 5 changes the amount of radiation D generated by the radiation irradiator 5 to a value suitable for identifying the part of the chicken A. It is a device for adjusting. Further, the radiation control device 5a can be controlled by the CPU 8 of the region determination device 7 described later. In addition, the irradiation angle and irradiation area of the radiation irradiation apparatus 5 and the number of arrangements of the apparatuses, the imaging angle and imaging range of the imaging camera 6, and the number of cameras may be changed.
[0024]
As other conversion methods instead of the above-mentioned phosphor 14, for example, gadolinium oxysulfide = Gd2O2S: Tb or cesium iodide = CsI: TI, a combination of a phosphor and an amorphous silicon sensor, or the use of an amorphous selenium photoconductor is used. Can also be converted.
[0025]
The above-described detection sensor 13 is disposed on the side of the transport path opposite to the chicken A transported to the first measurement section and the second measurement section, and the chicken A is transported to the first measurement section and the second measurement section. Is detected, and the detection signal is output to the region determination device 7. Further, instead of the detection sensor 13, for example, a limit switch or a proximity switch may be used.
[0026]
The above-described region determination device 7 temporarily stores the image information output from the image processing device 12 in the detection information storage area (RAM), and stores the chicken A detection information stored in the detection information storage area and the comparison information storage. By comparing and calculating reference information necessary for identifying each part stored in the apparatus 11, information such as the color, shape, and size of the chicken A is obtained, and the mounting portion (not shown) of the conveyor 2 is obtained. 4) and 5), where the portion of the chicken A placed on the chicken is located.
[0027]
In other words, based on the image information output from the image processing apparatus 12, for example, the area (the entire area of the chicken A without the hole), the perimeter (the length of the periphery of the chicken A without the hole, the neighborhood of the region) Length of the line connecting the intermediate points of the boundary pixels to be formed), circularity (4π × area / (perimeter) squared = circularity), size (2 × area / perimeter = size), centroid distance (of chicken A Average the maximum and minimum distances from the center of gravity to the outer contour), the absolute maximum length (the longest part of chicken A = absolute maximum length), and the diagonal width (two straight lines parallel to the absolute maximum length) When sandwiched, shape feature quantities such as the shortest distance between the two straight lines, the needle ratio (absolute maximum length / diagonal width = needle ratio), complexity, and variance are extracted.
[0028]
In addition, based on the image information and the original image, for example, color information such as the ratio, the number, the complexity, and the position of each part is extracted. The measurement result of the chicken A and the reference information stored in the comparison information storage device are compared and calculated, and the chicken A is placed in any part of the chicken (for example, a drum (Dram), a wing (Wing), a keel (Keel). ), Ribs (Limb), rhinoceros (Sai), etc.) are individually determined and identified by the algorithm of FIGS. 4 and 5. In addition, the determination result of the chicken A and the address information of the placing portion (not shown) on which the chicken A is placed are stored in association with each other.
[0029]
As another identification method in place of the address or the time lag described above, for example, a recording medium (for example, a bar code, an ID card, a magnetic card, or the like) attached to or substantially corresponding to the placing portion of the chicken A itself. May be read, or the measurement information measured in the first and second measurement sections may be recorded on a recording medium.
[0030]
The illustrated embodiment is configured as described above, and a method of identifying a part of chicken A by the above-described meat identification device 1 will be described below.
[0031]
First, as shown in FIG. 1, the chicken A separated and separated into a plurality of parts is placed on the conveyor 2 and transported to the first detection section a, and the detection light emitted from the detection light irradiation device 3 is detected. The light B is applied to the chicken A transported to the first measurement section, the reflected light C reflected by the chicken A is captured by the imaging camera 4, and the captured information is output to the image processing device 12. The address information of the conveyor 2 set or moved substantially in correspondence with the chicken A and the image information captured by the imaging camera 4 are output to the site determination device 7 in association with each other.
[0032]
Next, the radiation D emitted from the radiation irradiating device 5 is applied to the chicken A transported to the second measurement section from below the conveyor 2, and the radiation D transmitted through the chicken A is taken by the imaging camera. 6 converts the transmitted light of the chicken A into whole or a part of the transmitted light of the chicken A on the upper surface side, and converts the transmitted image of the chicken A converted by the fluorescent 14 into an imaging camera. 6 and outputs the image information to the image processing device 12. In addition, the address information set or moved substantially in correspondence with the chicken A and the image information captured by the image capturing camera 6 are output to the site determination device 7 in association with each other.
[0033]
On the other hand, the above-described image processing device 12 processes image information captured by the imaging cameras 4 and 6 in an information form (for example, binarization processing, color information shown in FIG. 3) suitable for identifying each part. It is output to the part determination device 7. The part determination device 7 comprehensively individually determines where the chicken A transported by the transport conveyor 2 is based on the image information output from the imaging cameras 4 and 6, and the determination is performed. The site information of the chicken A and the address information of the mounting portion (not shown) on which the chicken A is mounted are stored in association with each other.
[0034]
Next, based on the image information captured by the imaging cameras 4 and 6, where the chicken A is identified and determined by the algorithm of the part determination device 7 using the algorithm of the part determination device 7, as shown in FIG. Size <110? It is determined in step 1 whether or not the size of the chicken A is smaller than the reference value. Is determined in step 2, and if it is determined that the needle ratio is equal to or greater than the reference value, the needle is identified as a drum (Dram).
[0035]
Next, when it is determined in step 2 that the needle ratio is equal to or less than the reference value, the center of gravity distance minimum / area <18? Is determined in step 3, and if it is determined that the center of gravity distance minimum / area is equal to or less than the reference value, the area <50000? Is determined in step 4, and if it is determined that the area is equal to or smaller than the reference value, it is identified as a left or right wing. In other words, the drum and the wing can be identified without any problem based on the characteristic amount centered on the shape.
[0036]
Next, in Step 3, when it is determined that the center of gravity distance minimum / area is equal to or more than the reference value, and when it is determined in Step 4 that the area is equal to or more than the reference value, the process proceeds to Step 5.
[0037]
Next, complexity <1500? Is determined in step 5, and if it is determined that the complexity is equal to or less than the reference value, the needle ratio> 1.45? Is determined in step 6, and if it is determined that the needle ratio is equal to or more than the reference value, it is identified as a keel. If it is determined in step 5 that the complexity is equal to or larger than the reference value, the process proceeds to step 13 in FIG.
[0038]
Next, in step 6, when it is determined that the needle ratio is equal to or less than the reference value, the needle ratio is greater than 1.25? Is determined in step 7, and if it is determined that the needle ratio is equal to or more than the reference value, the number of YG <10? Is determined in step 8, and if it is determined that the number of YGs is equal to or smaller than the reference value, the complexity of YG <100? Is determined in step 9, and if it is determined that the complexity of the YG is equal to or less than the reference value, it is determined that the YG is behind a keel.
[0039]
If it is determined in step 8 that the number of YGs is equal to or greater than the reference value, the process proceeds to step 10. If it is determined in step 9 that the complexity of the YG is equal to or more than the reference value, the process proceeds to step 11.
[0040]
Next, the number of YG <15? Is determined in step 10, and when it is determined that the number of YGs is equal to or less than the reference value, the ratio of Y2 <25%? Is determined in step 11, and if the ratio is determined to be equal to or less than the reference value, the ratio of Y2 + YG> 70%? Is determined in step 12, and if it is determined that the ratio of Y2 + YG is equal to or more than the reference value, the table is identified as a table of Keel.
[0041]
Next, if it is determined in step 7 that the needle ratio is equal to or less than the reference value, if it is determined in step 10 that the number of YGs is equal to or less than the reference value, it is determined that the ratio of Y2 is equal to or greater than the reference value. If it is determined in step 11 that the ratio of Y2 + YG is equal to or less than the reference value in step 12, the process proceeds to step 13 in FIG.
[0042]
Next, as shown in FIG. 5, R dispersion <200? Is determined in step 13, and when it is determined that the R dispersion is equal to or smaller than the reference value, the table is identified as a table of Sai.
[0043]
Next, when it is determined in step 13 that the R dispersion is equal to or larger than the reference value, the area of R1 + R2> 2000? Is determined in step 14, and if it is determined that the area of R1 + R2 is equal to or larger than the reference value, the distance of R1 + R2> 20? Is determined in step 15, and if it is determined that the distance of R1 + R2 is equal to or greater than the reference value, the number of R1 + R2 <= 10? Is determined in step 16, and when it is determined that the number of R1 + R2 is equal to or less than the reference value or substantially equal, it is identified as the back side of the die (Sai). If it is determined in step 15 that the distance of R1 + R2 is equal to or less than the reference value, it is determined that the distance is behind the rib (Limb).
[0044]
Next, in Step 14, when it is determined that the area of R1 + R2 is equal to or less than the reference value, and in Step 16, it is determined that the number of R1 + R2 is equal to or more than the reference value, the process proceeds to Step 17.
[0045]
Next, the area of R1 + R2 <1000? Is determined in step 17, and if it is determined that the area of R1 + R2 is equal to or smaller than the reference value, the ratio of Y2 + YG <60%? Is determined in step 18, and if it is determined that the ratio of Y2 + YG is equal to or less than the reference value, it is identified as a table of ribs (Limb). That is, based on the transmission image captured by the imaging camera 6, a part of the keel, the ribs, and the rhinoceros that are similar in shape and color, which were difficult to be identified only by the image information captured by the imaging camera 4, are established with high probability. Can be identified almost exactly.
[0046]
Next, in Step 17, when it is determined that the area of R1 + R2 is equal to or more than the reference value, and in Step 18, it is determined that the ratio of Y2 + YG is equal to or more than the reference value, the process proceeds to Step 19.
[0047]
Next, the number of R1 + R2 <5? Is determined in step 19, and when it is determined that the number of R1 + R2 is equal to or smaller than the reference value, the table is identified as a table of ribs (Limb). If it is determined that the number of R1 + R2 is equal to or more than the reference value, the portion of the chicken A cannot be determined. Step 20 is repeated several times to identify. Since the determination cannot be made for the second time or later, the information is collected or discarded.
[0048]
Also, if the remaining chicken A can be narrowed down to the back of the rhinoceros and the front and back of the ribs, it is possible to identify the front and back of the ribs from this shape. In this case, one condition is that the drum and the wings, the keel, and the rhinoceros table can be reliably identified.
[0049]
As described above, the detection light B emitted from the detection light irradiation device 3 and the radiation D emitted from the radiation irradiation device 5 are applied to the chicken A transported by the transport conveyor 2, and the chicken A is reflected. The transmitted images of the reflected light C and the radiation D transmitted through the chicken A are captured by the imaging cameras 4 and 6, and based on the image information output from the imaging cameras 4 and 6, where the chicken A is located Since the individual determination is performed comprehensively by the algorithm of the part determination device 7, each part of the chicken A can be identified and determined accurately and reliably, and the operation of sorting various chickens A for each part can be performed accurately. In addition, it is possible to improve the sorting accuracy and save labor of the sorting operation.
[0050]
The radiation D emitted from the radiation irradiating device 5 is first irradiated onto the chicken A transported by the transport conveyor 2, and a transmission image of the radiation D transmitted through the chicken A is captured by the imaging camera 6. It is also possible to irradiate the chicken A with the detection light B emitted from the detection light irradiating device 3 and take an image of the reflected light C reflected by the chicken A with the imaging camera 4, which is not limited to the configuration of the embodiment. Not something.
[0051]
Further, the reference value (numerical value) described in the algorithm of FIGS. 4 and 5 may be changed to a value according to the type of other chicken, beef, pork, etc., and each part of the meat is identified. Can be applied to
[Brief description of the drawings]
FIG. 1 is a perspective view showing a method of identifying a part of chicken by a meat identification device.
FIG. 2 is a control circuit block diagram of the meat identification device.
FIG. 3 is an explanatory diagram showing a color processing state of chicken.
FIG. 4 is an algorithm diagram showing a method for identifying a drum, a wing, and a keel.
FIG. 5 is an algorithm diagram showing a method of identifying a rhino and a rib following FIG. 4;
[Explanation of symbols]
A ... chicken B ... detection light C ... reflected light D ... radiation 1 ... meat identification device 2 ... transport conveyor 3 ... detection light irradiation device 5 ... radiation irradiation devices 4, 6 ... imaging camera 7 ... part determination device 11 ... comparison information storage Device 12 image processing device 13 detection sensor

Claims (6)

The meat is irradiated with external detection light projected from the external detection light irradiation means and internal detection light projected from the internal detection light irradiation means,
The external detection light reflected by the meat is detected by the external detection light detection means, and the internal detection light transmitted through the meat is detected by the internal detection light detection means,
A meat identification method for determining, based on detection information output from the internal detection light detection means and the external detection light detection means, a part of the meat by an algorithm of a part determination means. The external detection light irradiation means and the external detection light detection means, and the internal detection light irradiation means and the internal detection light detection means, provided on a conveyor that conveys the meat,
The external detection light emitted from the external detection light irradiating means and the internal detection light emitted from the internal detection light irradiating means are irradiated on the meat conveyed by the conveyor, and the external detection in which the meat is reflected The meat identification method according to claim 1, wherein the light and the internal detection light transmitted through the meat are detected by the external detection light detection means and the internal detection light detection means while the meat is being conveyed. External detection light irradiation means for irradiating the meat with external detection light having a wavelength suitable for detecting a predetermined item outside the meat,
External detection light detection means for detecting the external detection light reflected by the meat,
Internal detection light irradiating means for irradiating the meat with internal detection light having a wavelength suitable for detecting a predetermined item inside the meat,
Internal detection light detection means for detecting the internal detection light transmitted through the meat,
A meat identification apparatus comprising: a part determination unit that determines a part of the meat by a predetermined algorithm based on detection information detected by the external detection light emitting unit and the internal detection light detection unit. 4. The meat identification device according to claim 3, wherein the external detection light irradiation unit and the external detection light detection unit, and the internal detection light irradiation unit and the internal detection light detection unit are provided on a conveyor that conveys the meat. The external detection light irradiating means comprises detection light irradiating means for irradiating the meat with detection light,
The meat identification method according to claim 1 or 2, and the meat identification device according to claim 3 or 4, wherein the external detection light detection unit is configured by a reflection light detection unit that detects reflected light reflected by the meat. The internal detection light irradiation means, radiation irradiation means for irradiating the meat with radiation,
The meat identification method according to claim 1 or 2, and the meat identification device according to claim 3 or 4, wherein the internal detection light detection unit includes a radiation detection unit that detects radiation transmitted through the meat.

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