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Sudden Illumination Change Detection and Image Contrast Enhancement

  • Bayanmunkh Odgerel
  • Chang Hoon Lee
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 273)

Abstract

Sudden illumination change is considered as one of crucial issue in many computer and robot vision (CRV) applications. Most CRV algorithms fail when sudden illumination change occurs; therefore, it is essential that images to be detected then the illumination change occurred images need to be enhanced in order to keep the appropriate algorithm processing in real time. We introduce a new method for detecting sudden illumination change efficiently in real time by using local region information and fuzzy logic. The effective way for detecting illumination changes in lighting area and the edge of the area is to analyze the mean and variance of the histogram of each area and in order to reflect the changing trends previous frame’s mean and variance for each area of the histogram is used as an input. The changes of mean and variance make specific patterns when sudden illumination change occurs. Fuzzy rules were defined based on the patterns of the input for detecting illumination changes. Proposed method was tested with different datasets through the evaluation metrics; in particular, the specificity, recall and precision have showed high rates. We also proposed an automatic parameter selection method for contrast limited adaptive histogram equalization method by using entropy of image and adaptive neural fuzzy inference system. The results showed that the contrast of images could be improved. The proposed algorithm is robust to detect both global sudden illumination change and big moving object, and it is also computationally efficient in real time applications.

Keywords

Fuzzy Logic Fuzzy Rule Region Information Image Histogram Adaptive Neural Fuzzy Inference System Contrast Limited Adaptive Histogram Equalization 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of Electronic EngineeringPaichai UniversityDaejonKorea

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