概括
本研究引入了一种双域校正方法,以消除红外图像中的固定模式噪声 (FPN). 这种方法有效地去除了条纹和光学FPN,改善了红外视频的图像质量.
科学领域:
- 红外成像技术 红外成像技术
- 图像处理 图像处理
- 信号处理 信号处理
背景情况:
- 红外成像中的不均性是一个持久的问题,导致固定模式噪声 (FPN) 降低图像质量.
- 当前基于场景的非均性校正 (NUC) 算法有效地处理条纹FPN,但在空间连续的光学FPN中失败.
研究的目的:
- 提出一种新的基于场景的双域校正方法,用于同时删除红外图像中的条纹和光学FPN.
- 通过减轻因不均造成的降解来提高红外图像的质量.
主要方法:
- 采用双域校正策略,利用频域增益校正和空间域偏移校正.
- 通过使用引导过器对所需图像进行近似处理,并反复更新偏差校正参数来解决Stripe FPN问题.
- 通过使用里埃转换和更新增强校正参数来分离低频噪声来消除光学FPN.
- 通过适应性策略,在参数更新期间调整学习速率和权重来缓解幽灵文物.
主要成果:
- 拟议的双域方法有效地消除了条纹和光学FPN.
- 综合评估显示,在真实和模拟红外视频上,与现有方法相比,性能优越.
- 该方法成功地减轻了幽灵文物,进一步提高了图像校正保真度.
结论:
- 开发的双域校正方法为红外图像不均提供了强大的解决方案.
- 这种方法通过处理多个FPN源,显著提高了红外图像质量.
- 这些发现有助于提高各种红外成像应用的性能.
相关概念视频
01:26Linear Approximation in Frequency Domain
89
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
89
01:21Linear Approximation in Time Domain
81
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
81