Prediction of the Weight of Alaskan Pollock Using Image Analysis


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BALABAN M. O. , CHOMBEAU M., CIRBAN D., GÜMÜŞ B.

JOURNAL OF FOOD SCIENCE, vol.75, no.8, 2010 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 75 Issue: 8
  • Publication Date: 2010
  • Doi Number: 10.1111/j.1750-3841.2010.01813.x
  • Journal Name: JOURNAL OF FOOD SCIENCE
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Keywords: Alaskan Pollock, image processing, view area, weight, SALMON SALMO-SALAR, COMPUTER VISION, TECHNOLOGY, SHAPE, FISH

Abstract

Determining the size and quality attributes of fish by machine vision is gaining acceptance and increasing use in the seafood industry. Objectivity, speed, and record keeping are advantages in using this method. The objective of this work was to develop the mathematical correlations to predict the weight of whole Alaskan Pollock (Theragra chalcogramma) based on its view area from a camera. One hundred and sixty whole Pollock were obtained fresh, within 2 d after catch from a Kodiak, Alaska, processing plant. The fish were first weighed, then placed in a light box equipped with a Nikon D200 digital camera. A reference square of known surface area was placed by the fish. The obtained image was analyzed to calculate the view area of each fish. The following equations were used to fit the view area (X) compared with weight (Y) data: linear, power, and 2nd-order polynomial. The power fit (Y = A center dot XB) gave the highest R2 for the fit (0.99). The effect of fins and tail on the accuracy of the weight prediction using view area were evaluated. Removing fins and tails did not improve prediction accuracy. Machine vision can accurately predict the weight of whole Pollock.