روشی جدید برای بازنمونه‌برداری اپی‌پلار تصاویر خطی پوش‌بروم مبتنی بر مدل پارامترهای مداری

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ‌ارشد مهندسی سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی

2 استاد گروه فتوگرامتری و سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی

3 استادیار گروه فتوگرامتری و سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی

4 کارشناس ‌ارشد مهندسی سنجش از دور، دانشگاه صنعتی خواجه نصیرالدین طوسی

چکیده

در تصاویر نرمال که براساس هندسۀ اپی‌پلار بازنمونه‌برداری شده‌اند، نقاط متناظر در زوج تصویر در راستای یک سطر یا ستون‌اند و پارالاکس قائم نخواهند داشت. این ویژگی تصاویر نرمال را به‌منزلۀ پیش‌نیاز اصلی طیف وسیعی از کارهای فتوگرامتری نظیر تناظریابی، مثلث‌بندی هوایی خودکار، تولید مدل رقومی زمین، تولید ارتوفتو، و برجسته‌بینی مطرح کرده است. در این مقاله، روش جدیدی مبتنی بر استفاده از مدل پارامترهای مداری برای بازنمونه‌برداری اپی‌پلار تصاویر خطی پوش‌بروم پیشنهاد شده است. روش پیشنهادی براساس تصحیح پارامترهای توجیه خارجی مدل پارامترهای مداری در فضای شیئ توسعه یافته است. از مزایای این مدل می‌شود به امکان تصحیح اثر دید غیرقائم سنجنده به‌واسطۀ تعبیرپذیری فیزیکی پارامترهای مدل و امکان پیاده‌سازی روند پیشنهادی، با استفاده از دیگر مدل‌های مطرح در حوزۀ تصحیح هندسی تصاویر ماهواره اشاره کرد. طبق نتایج حاصل از ارزیابی دقت تصاویر نرمال تولیدشده به روش پیشنهادی در سطح نقاط چک مستقل، متوسط پارالاکس x باقی‌مانده در سطح مدل 73/0 پیکسل حاصل شد که بر کارآیی مدل پیشنهادی دلالت دارد.

کلیدواژه‌ها

عنوان مقاله [English]

A Novel Approach for Epipolar Resampling of Linear Pushbroom Images Based on Orbital Parameters Model

نویسندگان [English]

  • M Jannati 1
  • M.J Valadan Zouj 2
  • A MohammadZadeh 3
  • A. Safdarinezhad 4
1 MSc Student, Department of Remote Sensing Engineering, K. N. Toosi University of Technology
2 Professor, Department of Remote Sensing Engineering, K. N. Toosi University of Technology
3 Assistant Professor, Department of Remote Sensing Engineering, K. N. Toosi University of Technology
4 MSc in Remote Sensing, K. N. Toosi University of Technology
چکیده [English]

In normal images, which resampled according to epipolar geometry, all of spatial displacements of points in the space of stereo images occur only in one direction of the digital image coordinate system. This prominent characteristic makes normalized imagery as an important prerequisite for many photogrammetric activities such as image matching, automatic aerial triangulation, automatic digital elevation model and orthophoto generation, and stereo viewing. In this paper, a novel approach for epipolar resampling of linear pushbroom satellite imagery is proposed based on Orbital Parameters Model (OPM). The proposed method is developed based on modifying the exterior orientation parameters of OPM in the object space. The most prominent advantage of this method is the capability of the correction of off-nadir viewing of the sensor through the physical interpretation of its parameters. Also, there is the capability of implementation of the proposed method by means of other common physical or interpolative mathematical models used in geometric correction of satellite imagery. According to the results, the average reminded vertical parallax x in the digital image coordinate system is determined 0.73 pixels with respect to the independent check points that demonstrates the high performance of the proposed method

کلیدواژه‌ها [English]

  • Epipolar Resampling
  • Linear Pushbroom Imagery
  • Orbital Parameters Model

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