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5 August 2015 Perceptual image quality in normalized LOG domain for Adaptive Optics image post-processing
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Abstract
Adaptive Optics together with subsequent post-processing techniques obviously improve the resolution of turbulencedegraded images in ground-based space objects detection and identification. The most common method for frame selection and stopping iteration in post-processing has always been subjective viewing of the images due to a lack of widely agreed-upon objective quality metric. Full reference metrics are not applicable for assessing the field data, no-reference metrics tend to perform poor sensitivity for Adaptive Optics images. In the present work, based on the Laplacian of Gaussian (LOG) local contrast feature, a nonlinear normalization is applied to transform the input image into a normalized LOG domain; a quantitative index is then extracted in this domain to assess the perceptual image quality. Experiments show this no-reference quality index is highly consistent with the subjective evaluation of input images for different blur degree and different iteration number.
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Shiping Guo, Rongzhi Zhang, Jisheng Li, Jianhua Zou, Changhai Liu, and Weizhe Gao "Perceptual image quality in normalized LOG domain for Adaptive Optics image post-processing", Proc. SPIE 9622, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Processing Technology, 96221G (5 August 2015); https://doi.org/10.1117/12.2195799
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