Sensors, Vol. 20, Pages 6489: A Spatial-Frequency Domain Associated Image-Optimization Method for Illumination-Robust Image Matching

Sensors, Vol. 20, Pages 6489: A Spatial-Frequency Domain Associated Image-Optimization Method for Illumination-Robust Image Matching Sensors doi: 10.3390/s20226489 Authors: Chun Liu Shoujun Jia Hangbin Wu Doudou Zeng Fanjin Cheng Shuhang Zhang Image matching forms an essential means of data association for computer vision, photogrammetry and remote sensing. The quality of image matching is heavily dependent on image details and naturalness. However, complex illuminations, denoting extreme and changing illuminations, are inevitable in real scenarios, and seriously deteriorate image matching performance due to their significant influence on the image naturalness and details. In this paper, a spatial-frequency domain associated image-optimization method, comprising two main models, is specially designed for improving image matching with complex illuminations. First, an adaptive luminance equalization is implemented in the spatial domain to reduce radiometric variations, instead of removing all illumination components. Second, a frequency domain analysis-based feature-enhancement model is proposed to enhance image features while preserving image naturalness and restraining over-enhancement. The proposed method associates the advantages of the spatial and frequency domain analyses to complete illumination equalization, feature enhancement and naturalness preservation, and thus acquiring the optimized images that are robust to the complex illuminations. More impor...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research