Food and Fermentation Industries >

2025 , Vol. 51 >Issue 1: 273 - 279

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.040867

The classification of dried chili pepper appearance quality utilizing mobile phone photography integrated with Image J software

  • HU Jinwei ,
  • ZHAO Zhifeng ,
  • ZHANG Xinying ,
  • ZHU He ,
  • LI Bo ,
  • SUN Haiqing ,
  • XU Weizhen
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  • 1(Sichuan University of Science & Engineering, School of Biological Engineering, Yibin 644000, China)
    2(School of Food Science and Engineering, Shandong Agriculture and Engineering University, Jinan 250000, China)

Received date: 2024-08-27

  Revised date: 2024-09-19

  Online published: 2025-01-23

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Abstract

The appearance, shape, and colour of dried chili peppers are critical criteria for quality classification.Currently, the inspection methods for the appearance, shape, and colour of dried chili peppers outlined in GB 10465—1989 still rely on manual detection, often influenced by subjective perception, errors, visual physiology, and other factors.This makes it challenging to establish scientific and accepted standardized detection protocols.In this study, images of dried chili peppers were obtained using mobile phone photography, and image processing was carried out through Image J software.A convenient, rapid, and accurate method for determining the related characteristic quantities of the appearance and shape of dried chili peppers was proposed.Compared to manual measurements such as the vernier caliper method and paper-cutting method, this approach offers greater convenience and speed, enabling the measurement of phenotype indicators, including length, width, and area of dried chili peppers.Furthermore, the characteristic parameters of the appearance colour of dried chili peppers were obtained by constructing the Red-Green-Blue (RGB) colour model.Colour sorting adopts the classification basis of the R/(G+B) ratio.Combined with the width-to-length ratio and area of dried chili peppers, dried chili peppers can be classified into three grades:high-quality, qualified, and unqualified.

Key words： dried chili peppers; mobile phone photography; Image J software; RGB color model; classification

Cite this article

HU Jinwei , ZHAO Zhifeng , ZHANG Xinying , ZHU He , LI Bo , SUN Haiqing , XU Weizhen . The classification of dried chili pepper appearance quality utilizing mobile phone photography integrated with Image J software[J]. Food and Fermentation Industries, 2025 , 51(1) : 273 -279 . DOI: 10.13995/j.cnki.11-1802/ts.040867

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