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A novel identification method for CPPU-treated kiwifruits based on images.

Bin Yan1, Wenchuan Guo1,2,3

  • 1College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, China.

Journal of the Science of Food and Agriculture
|June 29, 2019
PubMed
Summary
This summary is machine-generated.

A new method accurately identifies forchlorfenuron (CPPU)-treated kiwifruits using image analysis. This non-destructive technique offers a quick and convenient way to distinguish treated from untreated kiwifruits, benefiting the industry.

Keywords:
CPPUcalyxidentificationimage processingkiwifruitsmachine vision

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Area of Science:

  • Agricultural Science
  • Image Processing
  • Horticulture

Background:

  • Forchlorfenuron (CPPU) application is crucial for kiwifruit industry economics and development.
  • Distinguishing CPPU-treated from untreated kiwifruits is challenging due to subtle calyx shape differences.
  • A non-destructive, cost-effective identification method is needed.

Purpose of the Study:

  • To develop a cheap, quick, and non-destructive method for identifying CPPU-treated kiwifruits.
  • To utilize visible light imaging for distinguishing kiwifruits based on calyx morphology.

Main Methods:

  • Kiwifruit segmentation from background using Otsu algorithm, hole filling, and bwareaopen.
  • Calyx extraction via corrosion, image enhancement, hole filling, and closing operations.
  • Identification based on the length/width ratio of the calyx's minimum enclosing rectangle (>1.6 for CPPU-treated).

Main Results:

  • The developed method achieved a total identification accuracy rate of 90.0%.
  • Accurate identification was possible using smartphone images under normal lighting.
  • An image acquisition system also yielded high accuracy.

Conclusions:

  • Computer and smartphone programs were developed for rapid kiwifruit identification (0.6s and 2s, respectively).
  • The study enables real-time identification of CPPU-treated kiwifruits.
  • A convenient method is provided for kiwifruit consumers and industry professionals.