Electronic Science and Technology ›› 2020, Vol. 33 ›› Issue (2): 43-47.doi: 10.16180/j.cnki.issn1007-7820.2020.02.008

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An Identification Method of Coins Denomination Based on Image Detection

MA Xudong,YUAN Ruibo   

  1. School of Mechanical & Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China
  • Received:2019-01-13 Online:2020-02-15 Published:2020-03-12
  • Supported by:
    National Nature Science Foundation of China(51605294)


In order to realize accurate recognition of multiple coin denominations at the same time, a recognition method of coins denomination based on image detection was proposed in this paper. Firstly, median filtering, threshold segmentation and morphological operations were gradually used to extract ROI of coins in grayscale image to realize rough coins positioning. Then, the smallest rectangles outside ROI were taken as the research area to extract the images from the original image. The extracted images were transformed from RGB color space to HSV color space, so the 5-dime coins could be identified through the difference of color features. Finally,SSIM image quality evaluation method was used to detect and identify the 1-dime coins and 1-yuan coins in the remaining ROI. The result showed that the identification method of coins denomination could accurately identify multiple coins at the same time without accurately obtaining the coin size.

Key words: coin identification, median filtering, threshold segmentation, ROI extraction, HSV, SSIM

CLC Number: 

  • TP391.41