Methods and systems for determining fish catches

Patent metadata

Field	Value
Publication number	US-9367930-B2
Application number	US-201113819852-A
Country	US
Kind code	B2
Filing date	Aug 31, 2011
Priority date	Aug 31, 2010
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

The present disclosure is directed towards determining, at sea, the respective weights of fish species that are part of a fish catch. By way of the present disclosure, images of a fish catch are taken using triangulation techniques involving stereo-photogrammetry. According to one embodiment, a method for estimating a total weight of a fish catch includes receiving a fish catch on a fishing vessel and capturing images of the fish catch. From the images, fishes are identified and the species to which the corresponding fishes belong are also identified. Using the images, lengths of the identified fishes as well as the total volume occupied by the fish catch are determined, which can be used to estimate the total weight of the fish catch.

First claim

What is claimed is:

1. A method for estimating a total weight of a fish catch, comprising:
capturing images of a fish catch; the fish catch having been received on a fishing vessel;
wherein capturing images of the fish catch comprises:
capturing a first image from a first camera; and
simultaneously capturing a second image from a second camera;

identifying fishes in the images;
applying stereo-photogrammetry to obtain characteristics of each fish from the fishes; the first camera and the second camera being configured such that stereo-photogrammetry can be applied;
identifying, using the characteristics, for each of the fishes, a species to which a corresponding fish belongs;
determining, from the images, lengths of fishes that are a part of the fish catch;
determining, from the images, a volume occupied by the fish catch; and
estimating the total weight of the fish catch based on the lengths of fishes and the volume occupied by the fish catch.

2. The method of claim 1 , wherein determining, from the images, lengths of fishes that are a part of the fish catch comprises:
measuring, from the captured images, a characteristic length associated with the fish;
determining a species of the identified fish; and
determining a total fish length based on the measured characteristic length and the species to which the identified fish belongs.

3. The method of claim 2 , wherein determining the total fish length based on the measured characteristic length comprises solving a total length determination equation that correlates a particular characteristic length to the total fish length.

4. The method of claim 1 , wherein determining, from the images, a volume occupied by the fish catch, comprises:
identifying, on the captured images, boundaries formed by the fish catch;
selecting points at the identified boundaries; and
calculating the volume occupied by the selected points.

5. A method for estimating a total weight of a fish catch, comprising:
capturing images of a fish catch; the fish catch having been received on a fishing vessel;
wherein capturing images of the fish catch comprises:
capturing a first image from a first camera; and
simultaneously capturing a second image from a second camera;

identifying fishes in the images;
applying stereo-photogrammetry to obtain characteristics of each fish from the fishes; the first camera and the second camera being configured such that stereo-photogrammetry can be applied;
identifying, using the characteristics, for each of the fishes, a species to which a corresponding fish belongs;
determining, from the images, lengths of fishes that are a part of the fish catch;
determining, from the images, a volume occupied by the fish catch; and
estimating the total weight of the fish catch based on the lengths of fishes and the volume occupied by the fish catch; wherein estimating the total weight of the fish catch based on the lengths of fishes and the volume occupied by the fish catch comprises:
determining respective ratios of a number of fish of a particular species to a total number of identified fishes;
calculating an average fish species volume;
determining a total volume occupied by the identified fishes;
determining a total number of fish in each species from the total volume occupied by the identified fishes and the total volume occupied by the fish catch; and
determining a total weight of fish that belong to a particular species that are a part of the fish catch.

6. The method of claim 5 , wherein calculating an average fish species volume comprises:
determining a volume of each of the identified fish for a particular species;
adding the volume of each of the identified fish for a particular species to generate a sum; and
dividing the sum by the number of identified fish for the particular species.

7. The method of claim 5 , wherein determining the total weight of fish that belong to a particular species that are a part of the fish catch comprises:
determining an average weight of a fish of the particular species; and
multiplying the average weight of a fish of the particular species to the number of fish of the particular species that are a part of the fish catch.

8. The method of claim 7 , wherein determining the average weight of a fish of the particular species comprises accessing a database containing data correlating an average length of a fish to an average weight of a fish of the particular species.

9. A fish catch weight measurement system, comprising:
a first camera;
a second camera, the first camera and the second camera being configured such that stereo-photogrammetry can be applied;
a processor;
a memory coupled to the processor, having computer-executable instructions stored thereon, which when executed by the processor, cause the processor to:
receive images from an image capture system, the image capture system comprising the first camera and the second camera; the image capture system capturing images of a fish catch; the fish catch being received on a fishing vessel;
identify fishes from the images,
apply stereo-photogrammetry to obtain characteristics of each fish from the fishes,
determine, using the characteristics, for each identified fish, a fish species to which the fish belongs,
measure, for each identified fish, a characteristic length of the identified fish,
determine, for each identified fish, a total length of the identified fish from the characteristic length,
determine, for each identified fish, an estimated corresponding volume and weight of the identified fish,
determine a total volume occupied by the fish catch,
determine a total number of fish of each fish species, and
upon determining a total number of fish of each fish species, determine a total weight of fish in the fish catch that belong to a particular fish species.

10. The fish catch weight measurement system of claim 9 , wherein the memory having further computer-executable instructions, which when executed by the processor, cause the processor to store the images and associated data in the storage location.

11. A fish catch weight measurement system comprising:
a first camera;
a second camera, the first camera and the second camera being configured such that stereo-photogrammetry can be applied;
a processor;
a memory coupled to the processor, having computer-executable instructions stored thereon, which when executed by the processor, cause the processor to:
receive images from an image capture system, the image capture system comprising the first camera and the second camera; the image capture system capturing images of a fish catch; the fish catch being received on a fishing vessel;
identify fishes from the images,
apply stereo-photogrammetry to obtain characteristics of each fish from the fishes,
determine, using the characteristics, for each identified fish, a fish species to which the fish belongs,
measure, for each identified fish, a characteristic length of the identified fish,
determine, for each identified fish, a total length of the identified fish from the characteristic length,
determine, for each identified fish, an estimated corresponding volume and weight of the identified fish,
determine a total volume occupied by the fish catch,
determine a total number of fish of each fish species, and

upon determining a total number of fish of each fish species, determine a total weight of fish in the fish catch that belong to a particular fish species;
wherein the memory having further computer-executable instructions, which when executed by the processor, cause the processor to:
determine respective ratios of the number of fish of a particular fish species to the tot

Assignees

• Chamberlain Glenn
• Rothschild Brian J
• Univ Massachusetts

Inventors

• Chamberlain Glenn
• Rothschild Brian J

Classifications

• G06T2207/10012

  Stereo images · CPC title

• G06T2207/30128

  Food products · CPC title

• G06T7/602 Primary

  Physics · mapped topic

• G06T7/0004

  Industrial image inspection · CPC title

• A01K73/10

  Determining the quantity of the catch, e.g. by the pull or drag on the lines · CPC title