Assessment of flower number per inflorescence in grapevine by image analysis under field conditions

  1. Diago, M.P. 1
  2. Sanz-Garcia, A. 1
  3. Millan, B. 1
  4. Blasco, J. 2
  5. Tardaguila, J. 1
  1. 1 Instituto de Ciencias de la Vid y del Vino
    info

    Instituto de Ciencias de la Vid y del Vino

    Logroño, España

    ROR https://ror.org/01rm2sw78

  2. 2 Instituto Valenciano de Investigaciones Agrarias
    info

    Instituto Valenciano de Investigaciones Agrarias

    Moncada i Reixac, España

    ROR https://ror.org/00kx3fw88

Revista:
Journal of the Science of Food and Agriculture

ISSN: 0022-5142

Año de publicación: 2014

Volumen: 94

Número: 10

Páginas: 1981-1987

Tipo: Artículo

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DOI: 10.1002/JSFA.6512 SCOPUS: 2-s2.0-84901924023 WoS: WOS:000337612400015 GOOGLE SCHOLAR

Otras publicaciones en: Journal of the Science of Food and Agriculture

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Resumen

BACKGROUND: Flowers, flowering and fruit set are key determinants of grapevine yield. Currently, practical methods to assess the flower number per inflorescence, necessary for fruit set estimation, are time and labour demanding. This work aims at developing a simple, cheap, fast, accurate and robust machine vision methodology to be applied to RGB images taken under field conditions, to estimate the number of flowers per inflorescence automatically. RESULTS: Ninety images of individual inflorescences of Vitis vinifera L. cultivars Tempranillo, Graciano and Carignan were acquired in the vineyard with a pocket RGB camera prior to flowering, and used to develop and test the 'flower counting' algorithm. Strong and significant relationships, with R2 above 80% for the three cultivars were observed between actual and automated estimation of inflorescence flower numbers, with a precision exceeding 90% for all cultivars. CONCLUSION: The developed algorithm proved that the analysis of digital images captured by pocket cameras under uncontrolled outdoors conditions was able to automatically provide a useful estimation of the number of flowers per inflorescence of grapevines at early stages of flowering. © 2013 Society of Chemical Industry.