Aerothermal radiation effect frequency domain correction method

US10521888B2 · kind B2 · utility

Assignee

• Huazhong University of Science and Technology · CN

Inventors

• Tianxu Zhang · 红钢城街道, CN
• Xuan Hou · 红钢城街道, CN
• Chuan Zhang · 红钢城街道, CN
• Li Liu · Kunshan, CN
• Quan Chen · Xi'an, CN
• Ao Zhong · 红钢城街道, CN
• Mingxing Xu · Hangzhou City, CN
• Yutian Zhou · 红钢城街道, CN

Key dates

• Filing date: Mar 20, 2019
• Grant date: Dec 31, 2019
• Expiry date: Mar 20, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/20024
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An aerothermal-radiation correction method, including: using a Gaussian surface to approximate a thermal radiation noise, performing a Fourier transform on the Gaussian surface so as to obtain a centralized spectrum of the thermal radiation noise, constructing a filter function H based on the centralized spectrum of the thermal radiation noise; performing a Fourier transform on the aerothermal-radiation degraded image f so as to obtain a centralized spectrum F, taking dot product of F and H to obtain a filtered spectrum G; and performing an inverse Fourier transform on filtered spectrum G to obtain a modulus, and acquire a corrected image. The method effectively removes background noise generated by aerothermal radiation, greatly improves image quality and image signal-to-noise ratio. The method features reduced computational complexity and a shorter operation time, and is suited for real-time processing.