Intel® Integrated Performance Primitives (Intel® IPP) Developer Guide and Reference

ID 790148
Date 3/22/2024
Public
Document Table of Contents

Motion Representation

Figure Motion Image History” (a) shows capturing a foreground silhouette of the moving object or person. As the person or object moves, copying the most recent foreground silhouette as the highest values in the motion history image creates a “layered history” of the resulting motion. Typically, this “highest value” is just a floating-point timestamp of time since the code has been running in milliseconds. Figure Motion Image History” (b) shows the result that may be called the Motion History Image (MHI). The MHI in Figure Motion Image History” represents how the motion took place. A pixel level or a time delta threshold, as appropriate, is set such that pixel values in the MHI that fall below that threshold are set to zero.

Motion Image History

The most recent motion has the highest value, earlier motions have decreasing values subject to a threshold below which the value is set to zero.