Chương 4: Các phương pháp phát hiện biên

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    Điểm biên: Một điểm ảnh được coi là điểm biên nếu có sự thay đổi nhanh hoặc đột ngột về mức xám (hoặc màu). Ví dụ trong ảnh nhị phân, điểm đen gọi là điểm biên nếu lân cận nó có ít nhất một điểm trắng.
  Đường biên (đường bao: boundary): tập hợp các điểm biên liên tiếp tạo thành một đường biên hay đường bao.
    Ý nghĩa của đường biên trong xử lý: ý nghĩa đầu tiên: đường biên là một loại đặc trưng cục bộ tiêu biểu trong phân tích, nhận dạng ảnh.

(Tham khảo)

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