光流法 Resources

Showing items tagged with "光流法"

Application Background The principle of optical flow method for detecting moving objects: assigning a velocity vector (optical flow) to each pixel in an image forms an optical flow field. If there are no moving objects, the optical flow field remains continuous and uniform. When moving objects are present, their optical flow differs from the background, causing discontinuities in the flow field, enabling detection of moving objects and their positions. Key Technologies 1.2 Horn-Schunck Model In 1981, Horn and Schunck introduced a variational approach by incorporating a global smoothness constraint based on the continuous and smooth characteristics of optical flow fields for moving objects. The energy equation consists of: - Data term representing brightness constancy constraint - Smoothness term enforcing flow field continuity

MATLAB 333 views Tagged

This MATLAB source code implements optical flow-based key frame extraction from videos, serving as the reference implementation for our content-based video retrieval research paper. The implementation includes optical flow calculation, motion analysis, and similarity-based key frame selection algorithms.

MATLAB 276 views Tagged

My graduation project featuring MATLAB-based key frame extraction code, enhanced with optical flow method references. The implementation utilizes Euclidean distance, mean, variance, and coefficient of variation metrics for frame difference analysis. The thoroughly debugged code produces optimal results and is shared here for community benefit.

MATLAB 296 views Tagged

The core principle of optical flow-based motion detection involves assigning a velocity vector to each pixel in an image, forming an image motion field where pixels correspond to points on 3D objects through projection relationships at specific moments, enabling dynamic analysis through velocity vector characteristics. Implementation typically involves calculating displacement between consecutive frames using algorithms like Lucas-Kanade or Horn-Schunck.

MATLAB 307 views Tagged