基于边缘权重分析的水面弱目标红外增强

为了提高水面环境下的弱目标红外图像的视觉质量,本文基于红外辐射理论,结合边缘分析与透射率等参数获取,实现了复原增强。通过辐射理论分析获得了原始场景图像关于透射率与路径辐射光的函数表达。利用暗通道先验,获取粗糙的透过率,结合边缘权重分析与导向滤波,获取精细透过率。在边缘分析基础上,确定了路径辐射。观测实验证明本文增强结果的潜在目标区域的局部对比好,突出了边缘与纹理特征。测试结果表明,本文方法运行速度快,增强的视觉效果好,客观评价值高,为后期的目标探测、识别等应用奠定了基础。

Infrared image enhancement for dim target based on edge weight analysis

To improve visual quality of weak target infrared images under the water,an enhancement method is proposed based on infrared radiation theory,edge analysis and transmittance estimation.Function expression for the original images about transmittance and optical path radiation are obtained by analyzing radiation theory.Coarse transmittance is gotten with dark channel prior,and fine transmittance is achieved based on edge weight analysis and guided filtering.Meanwhile,path radiation is also calculated with edge weight analysis.With the enhancement,the local contrast of potential target areas are highlighted well,enhancing the edge and texture feature.The testing results show that the proposed approach can fast obtain enhanced result with good visual effect,which lays a good foundation for target detection and recognition.