بررسی کیفیت طبقه‌بندی پوشش اراضی تالاب‌ها با تلفیق تصاویر سنتینل-1 و سنتینل-2 (مطالعه ی موردی: تالاب هورالعظیم)

نوع مقاله : پژوهشی

نویسندگان

1 گروه مهندسی نقشه‌برداری، دانشگاه آزاد، واحد تهران جنوب، تهران، ایران

2 گروه مهندسی نقشه‌برداری، دانشگاه آزاد اسلامی، واحد تهران جنوب، تهران، ایران

3 گروه مهندسی نقشه‌برداری، دانشگاه آزاد، اسلامی واحد تهران جنوب، تهران، ایران

چکیده

موضوع: رشد جمعیت، گرمایش جهانی و مدیریت نادرست باعث کاهش منابع آبی جهان شده است. برای حفظ این منابع، مدیریت و پایش مستمر ، تهیۀ نقشه‌های کاربری و پوشش اراضی، ضروری است.
هدف: بررسی کیفیت طبقه‌بندی پوشش اراضی و کاربری تالاب‌ها در تالاب هورالعظیم با استفاده از تلفیق تصاویر نوری و راداری به‌منظور نیل به نتایج دقیق‌تر است.
روش تحقیق: در این راستا، برای تهیۀ نقشه‌های پوشش اراضی تالاب هورالعظیم، از تصاویر ماهواره‌ای سنتینل-1 و سنتینل-2 همراه با روش‌های تلفیق مکانی و فرکانسی مانند IHS، PCA، Brovey، Ehlers و Wavelet-IHS استفاده شده است. تلفیق تصاویر به کاهش اثرات ابر و گردوغبار کمک کرده و با افزودن بافت به تصاویر نوری سنتینل-2، دقت طبقه‌بندی را افزایش داد. طبقه‌بندی تصاویر بعد از تلفیق با استفاده از روش‌های ماشین بردار پشتیبان (SVM) و نزدیک‌ترین همسایگی (KNN) انجام شد.
یافته‌ها: ارزیابی نتایج با شاخص‌های دقت کلی (OA) و ضریب کاپا نشان از افزایش پارامتر OA به میزان 1-6 درصد و پارامتر Kappa به میزان 2-5% در طبقه‌بندی KNN، و افزایش پارامترهای OA و Kappa به‌ترتیب 1-5 درصد و ۱-۴ درصد در طبقه‌بندی SVM نسبت به طبقه‌بندی با تصویر نوری شد.
نتیجه‌گیری: روش‌های فرکانسی و ترکیبی به‌عنوان بهترین روش‌های تلفیق انتخاب شدند و SVM به‌عنوان دقیق‌ترین روش طبقه‌بندی انتخاب شد. از دو قطبش VV و VH، قطبش VV عملکرد بهتری نشان داد.

کلیدواژه‌ها

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دوره 11، شماره 4
دی 1403
صفحه 543-562
  • تاریخ دریافت: 22 مهر 1403
  • تاریخ بازنگری: 18 آبان 1403
  • تاریخ پذیرش: 27 آذر 1403
  • تاریخ اولین انتشار: 01 دی 1403
  • تاریخ انتشار: 01 دی 1403