US Patent 10041673 Flare stack monitoring

Methods, systems, and computer-readable and executable instructions are described herein. One method includes receiving a sequence of images of a flare stack area from a thermal imaging component, identifying a first portion of the flare stack area moving at a first threshold optical flow using the sequence of images of the flare stack area, and identifying a second portion of the flare stack area moving at a second threshold optical flow using the sequence of images of the flare stack area.