การจับคู่จุดควบคุมภาคพื้นดินบนภาพถ่ายดาวเทียมอัตโนมัติ
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- ภาพถ่ายดาวเทียมระดับสองมีค่าพิกัดคลาดเคลื่อนกับพิกัดที่แท้จริงบนโลก การแก้ไขด้วยสายตามนุษย์ก่อให้เกิดความคลาดเคลื่อนสูงและเสียเวลามาก จุดควบคุมภาคพื้นดินเป็นข้อมูลที่สาคัญในการปรับเชิงเรขาคณิต รายงานฉบับนี้นาเสนอฐานข้อมูลสาหรับเก็บจุดควบคุมภาคพื้นดินโดยใช้ภาพถ่ายดาวเทียมระดับสามซึ่งสร้างมาจากจุดควบคุมภาคพื้นดินที่อ้างอิงค่าพิกัดจาก Google Map ด้วยโปรแกรม ENVI นอกจากนี้ยังทาการทดลองเปรียบเทียบรูปภาพระหว่างจุดควบคุมภาคพื้นดินกับภาพถ่ายดาวเทียม โดยทาการทดลองกับหลายๆ ขั้นตอนวิธีและช่วงเคลื่อนความถี่ของภาพ ในการทดลองพบว่าขั้นตอนวิธีแบบ Phase Correlation และช่วงเคลื่อนความถี่สีแดงให้ผลลัพธ์ดีที่สุด
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