نوع مقاله : مقاله پژوهشی فارسی
نویسندگان
1 گروه علوم و مهندسی صنایع غذایی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران.
2 گروه علوم و مهندسی صنایع غذایی، دانشکده کشاورزی، دانشگاه زنجان، زنجان ، ایران.
چکیده
در پژوهش حاضر روش پردازش تصویر جدیدی بر مبنای دو الگوریتم دودویی و RGB با هدف محاسبه میزان صدمات سطحی بهطور خودکار و انجام درجهبندی کیفی ایجاد گردید. ابتدا انگورها با استفاده از فرمولاسیونی از سطوح مختلف صمغ فارسی (صفر، 5/1 و 3 درصد) و روغن شاهدانه (صفر، 075/0 و 15/0 درصد) و 3/0 درصد گلیسرول پوششدهی گردید و در ادامه با اندازهگیری میزان صدمات سطحی انگور در روزهای 1 و 28 بهصورت دستی (با کمک نرمافزار Image j)، ضمن بررسی اثر پوشش در قالب طرح فاکتوریل (طرح پایه کاملاً تصادفی)، عملکرد الگوریتمهای پیشنهادی نیز ارزیابی گردید. در الگوریتم دودویی پس از پیشپردازش تصاویر، تصاویر به تصاویر دودویی تبدیل شدند. در الگوریتم RGB، فرآیند با کمک مقایسه آماری بین مولفههای رنگی صورت پذیرفت. پس از حذف دم انگور و محاسبه مناطق معیوب با کمک گشتاور تصویر (مرتبه صفر و اول)، در نهایت بر اساس درصد مناطق معیوب به 4 درجه کیفی عالی (کمتر از 5 درصد)، درجه 1 (بین 5 تا 20 درصد)، درجه 2 (بین 20 تا 35 درصد) و درجه 3 (بیشتر از 35 درصد) درجهبندی شد. مشخص شد که از کانالهای R، G و B با مقدار سطح آستانه 35/0، 45/0 و 3/0 میتوان برای فرآیند تشخیص صدمات سطحی استفاده نمود. نتایج نشان داد که هر دو الگوریتم دودویی و RGB توانستند فرآیند محاسبه میزان صدمات سطحی را با صحت بالایی (بهترتیب 33/97 و 08/98 درصد) انجام دهند و براساس نتایج ماتریکس درهمریختگی فرآیند درجهبندی نیز با صحت بالاتر از 30/96 درصد انجام گرفت. همچنین مشخص شد که پوششدهی با صمغ فارسی و روغن شاهدانه خصوصاً در سطوح پایین سبب کاهش بروز صدمات سطحی طی دوره نگهداری میگردد.
کلیدواژهها
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