2 results about "Distance constraints" patented technology

The present application relates to the technical field of video retrieval, and especially relates to a video space-time quantization range retrieval method and system based on distance constraint. The method comprises the following steps: acquiring video data; performing data preprocessing on the acquired video data; constructing a space-time joint index fusing distance constraint based on the preprocessed data; performing space-time range retrieval based on the constructed space-time joint index fusing distance constraint; and performing object consistency judgment and result output based on the retrieval result. The present application quantitatively represents the fine-grained space-time relationship of video objects in the same video or multiple videos, converts the space-time sensitive video data query semantics into accurate quantitative range queries in the time and space dimensions of the video objects, i.e. the spatial range queries among the same intra-frame video objects and the continuous time length range queries on the continuous video frames.

The application provides a distributed dynamic positioning method based on distance constraint, uses local information and target constraint, constructs an estimator based on local consensus on each sensor; combines real-time information under distance constraint, adopts an alternating multiplier method to realize real-time single-target tracking under only distance constraint, and realizes fast and accurate single-target tracking.