A Different Approach for Grape Leaf Color

Abstract

Color values and changes in color attributes are investigated in horticulture researches. Color is a significant indicator of quality and maturity and most of the time is used to determine the post-harvest physiology or the response of plants to various biotic or abiotic stress conditions. In this study, software was used to assess color attributes of digital images. In the analysis, measurements were made on JPEG images scanned at 1200 dpi. Grapevine leaves were used in this study since both the leaves and fruits were consumed and because of the need to determine the color characteristics within the scope of many scientific studies. Measurements made with 3 different color measurement methods were compared and presented in tables. With this method, it was aimed that the researchers reached the results they need with the aid of a computer, camera or platform camera with lighting devices without the need of an additional device. There were significant relationships between color measurement methods. Photoshop measurements had highly significant relationships with color meter measurements (R2 = 0.94-0.96). It was concluded based on present findings that Photoshop could yield reliable and repeatable color measurements without any needs for special instruments.

Keywords

• Grape
• leaf color
• CIE Lab
• photoshop

Kaynakça

1. Anonymous (2002). Glossary of color management tcrıns. Adobe Systems Incorporatcd web sayfası www.adobe.com/suppon/techguides/color/cms_glossary (Accessed to web: 14.03. 2002).
2. Bestman G, Utter B and Höhn K (2003). Expert Guide Color Management. Germany.
3. Brues S (2000). Postscriptium on Color Management, Gretag Macbeth, İsviçre.
4. Doğan İS (2002). Bisküvi Üretiminde Kalite Kriteri Olarak Renk Ölçümüne Yeni Bir Yaklaşım. Türkiye 7. Gıda Kongresi, 22-24 Mayıs 2002, Ankara.
5. Özcan A (2008). Kağıt yüzey pürüzlülüğünün LAB değerleri üzerine etkisinin belirlenmesi. İstanbul Ticaret Üniversitesi Fen Bilimleri Dergisi, 7 (14): 53-61.
6. Speirs H (1998). Introduction to Prepress, BPIF, Pira International, UK, The Basic Principles of Color and Lab for Computer Publishing (2003), Linotype-Hell.