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:: دوره 7، شماره 1 - ( 3-1398 ) ::
جلد 7 شماره 1 صفحات 210-193 برگشت به فهرست نسخه ها
افزایش کارایی و سرعت فرآیند تناظریابی کمترین مربعات در تصاویر رقومی
امین صداقت*، نازیلا محمدی
دانشگاه تبریز
چکیده:   (1108 مشاهده)
تناظریابی کمترین مربعات، LSM، (Least Square Matching) یکی از دقیق‌ترین روش‌های تناظریابی در فتوگرامتری و سنجش‌ازدور است. یکی از محدودیت‌های اساسی این روش پیچیدگی محاسباتی بالا به‌دلیل ابعاد بزرگ معادلات مشاهدات و روند تکراری آن تا دستیابی به جواب است. در این تحقیق روشی جدید به‌منظور بهبود سرعت و کارایی این الگوریتم با عنوان تناظریابی کمترین مربعات سریع، FLSM (Fast Least Square Matching) ارائه‌شده است. ایده اساسی در روش پیشنهادی کاهش تعداد معادلات مشاهدات در سرشکنی کمترین مربعات به‌منظور افزایش کارایی فرآیند تناظریابی است. برای این منظور پیکسل‌های واقع در پنجره تناظریابی با استفاده از یک معیار ویژه با عنوان استحکام رتبه‌بندی شده و درصد مشخصی از پیکسل‌ها با بالاترین استحکام در روند سرشکنی شرکت داده می‌شوند. به‌منظور محاسبه استحکام پیکسل‌ها از ترکیب معیار تناسب فاز و آنتروپی استفاده شده‌ است. روش پیشنهادی بر روی هشت جفت تصویر بردکوتاه، هوایی و ماهواره‌ای در دو دسته شبیه‌سازی‌شده و واقعی پیاده‌سازی شده و نتایج بیانگر بهبود قابل‌توجه سرعت (حدود سه برابر) با حفظ کیفیت فرآیند تناظریابی ‌است.
واژه‌های کلیدی: تناظریابی، کمترین مربعات، استحکام، کارایی
متن کامل [PDF 2151 kb]   (440 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: فتوگرامتری
دریافت: 1396/11/10 | پذیرش: 1397/6/10 | انتشار: 1398/3/31
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Sedaghat A, Mohammadi N. Fast Least Square Matching. jgit. 2019; 7 (1) :193-210
URL: http://jgit.kntu.ac.ir/article-1-686-fa.html

صداقت امین، محمدی نازیلا. افزایش کارایی و سرعت فرآیند تناظریابی کمترین مربعات در تصاویر رقومی. مهندسی فناوری اطلاعات مکانی. 1398; 7 (1) :210-193

URL: http://jgit.kntu.ac.ir/article-1-686-fa.html



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دوره 7، شماره 1 - ( 3-1398 ) برگشت به فهرست نسخه ها
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