Tách cảnh nền

Phương pháp tách cảnh nền (Tiếng Anh: Background subtraction) hay có thể gọi phương pháp phát hiện tiền cảnh (Tiếng Anh: foreground detection) là một kỹ thuật trong lĩnh vực xử lý ảnhthị giác máy tính khi mà tiền cảnh (foreground) sẽ được tách ra cho những bước xử lý tiếp theo (ví dụ như nhận dạng đối tượng, nhận dạng cử chỉ, chuyển động, vv). Thông thường những vùng ảnh quan tâm sẽ thuộc vùng tiền cảnh của bức ảnh, vì vậy việc tách cảnh nền hiệu quả và chính xác giúp cho các hệ thống này đạt được sự ổn định và tính nhanh chóng. Sau bước tiền xử lý, các bước xử lý tiếp theo sẽ sử dụng kỹ thuật tách nền này. Tách cảnh nền được ứng dụng rộng rãi trong nhiều lĩnh vực như camera giám sát, nhận dạng đối tượng, nhận dạng cử chỉ đối tượng, giao thông để theo dõi lưu lượng xe...[1]

Phương pháp tiếp cận

Phương pháp frame differencing

Phương pháp lọc trung bình Mean filter

Phương pháp Running Gaussian average

Phương pháp mô hình Gaussian hỗn hợp (GMM)

Nguồn tài liệu, Datasets and Codes

Sách

T. Bouwmans, F. Porikli, B. Horferlin, A. Vacavant, Handbook on "Background Modeling and Foreground Detection for Video Surveillance: Traditional and Recent Approaches, Implementations, Benchmarking and Evaluation", CRC Press, Taylor and Francis Group, June 2014. (For more information: http://www.crcpress.com/product/isbn/9781482205374)

Trang web BGS

The Background Subtraction Web Site (T. Bouwmans, Univ. La Rochelle, France) contains a full list of the references in the field, links to available datasets and codes. (For more information: http://sites.google.com/site/backgroundsubtraction/Home)

BGS Datasets

Thư viện Tách cảnh nền BGS

http://github.com/andrewssobral/bgslibrary)

Ứng dụng

  • Video Surveillance
  • Optical Motion Capture
  • Human Computer Interaction
  • Content based Video Coding

Tham khảo

  1. ^ M. Piccardi (tháng 10 năm 2004). Background subtraction techniques: a review (PDF). IEEE International Conference on Systems, Man and Cybernetics. 4. tr. 3099–3104. doi:10.1109/icsmc.2004.1400815.

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