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Sky Detection in Hazy Image.

Yingchao Song1,2,3, Haibo Luo4,5, Junkai Ma6,7,8

  • 1Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China. songyingchao@sia.cn.

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Summary
This summary is machine-generated.

This study introduces a new algorithm for detecting sky in hazy images by analyzing haze density. The method improves sky detection accuracy in various weather conditions, outperforming existing approaches.

Keywords:
HazySkyhaze-relevant featuresimbalance classifierperceptual hazy densitysky detectionsky labeling

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Area of Science:

  • Computer Vision
  • Image Processing

Background:

  • Sky detection is crucial for computer vision but current methods fail in adverse weather.
  • Existing sky detection algorithms struggle with hazy conditions, limiting their real-world applicability.

Purpose of the Study:

  • To develop a robust sky detection algorithm specifically for hazy images.
  • To improve the accuracy and reliability of sky detection under various weather and lighting conditions.

Main Methods:

  • Proposed a novel algorithm for sky detection in hazy images by probing haze density.
  • Employed image segmentation and region-level classification with new haze-relevant features.
  • Utilized two imbalance Support Vector Machine (SVM) classifiers and a similarity measurement for sky separation.
  • Created and utilized the HazySky dataset for training and evaluation.

Main Results:

  • The proposed method demonstrated superior detection accuracy on both the HazySky and SkyFinder datasets.
  • The algorithm effectively detects the sky even in hazy scenes and other adverse weather conditions.
  • Haze-relevant features significantly improved sky characterization in challenging environments.

Conclusions:

  • The novel algorithm offers a significant advancement in sky detection for computer vision applications.
  • The approach provides a reliable solution for sky detection under diverse and unfavorable environmental conditions.
  • The HazySky dataset serves as a valuable resource for future research in this domain.