Bipolar Log‐Intensity‐Variance Histogram Method for Local Image Patch Intensity Change Measurements
Han Wang, Quan Shi, Zhihuo Xu, Ming Wei, Hanseok Ko · Mathematical Problems in Engineering · 2019
For a fixed‐position camera, the intensity changes of an image pixel are often caused by object movement or illumination change. This paper focuses on such a problem: given two adjacent local image patches, how can the causes of intensity change be determined? A bipolar log‐intensity‐variance histogram is proposed to describe the intensity variations on the chaos phase plot subspace. This is combined with two sigmoid functions to construct a probabilistic measure function. Experimental results show that the proposed measurements are more effective and robust than conventional methods to the cause of variation in image intensity.