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	Lucas-Kanade Optical Flow	ブロブ検出
分野	コンピュータビジョン	コンピュータビジョン
系統	Machine learning	Machine learning
提唱年	1981	1998
提唱者	Bruce Lucas and Takeo Kanade	Tony Lindeberg
種類	Optical flow and tracking	Multi-scale feature detection
原典	Lucas, B. D., & Kanade, T. (1981). An iterative image registration technique with an application to stereo vision. Proceedings of the Seventh International Joint Conference on Artificial Intelligence (IJCAI), 674–679.	Lindeberg, T. (1998). Feature detection with automatic scale selection. International Journal of Computer Vision, 30(2), 79–116.
別名	Lucas-Kanade method, Sparse optical flow	Connected component analysis, Region-based detection
関連	5	5
概要	The Lucas-Kanade method, introduced by Bruce Lucas and Takeo Kanade in 1981, is a foundational technique for estimating optical flow—the apparent motion of objects in image sequences. By computing pixel-level motion vectors, the Lucas-Kanade algorithm tracks feature displacements between consecutive frames, enabling object tracking, motion estimation, and video analysis.	Blob detection is a technique for identifying regions of interest (blobs)—connected, homogeneous areas that differ from their surroundings—at multiple scales. Introduced by Lindeberg in the context of scale-space theory, blob detection automatically finds and characterizes circular or elliptical objects without requiring a priori knowledge of their size.