Real-time terahertz scanning imaging by use of a pyroelectric array camera and image denoising.
Real-time terahertz scanning imaging by use of a pyroelectric array camera and image denoising.
复制标题
利用热释电阵列相机进行实时太赫兹扫描成像和图像去噪。
DOI：
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发表时间：
2010
影响因子：
1.9
通讯作者：
Qi Wang
中科院分区：
文献类型：
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作者：
Qi Li;S. Ding;R. Yao;Qi Wang
介绍了一种基于124×124热释电阵列相机和CO(2)泵浦连续太赫兹激光器的高分辨率大面积太赫兹（THz）扫描成像系统。将扫描机构应用于实时成像装置，实现了大面积目标的成像。采用自制分辨图进行分辨测试。为了提高图像质量，对图像中的噪声进行了研究和建模，并将几种去噪方法与实时太赫兹原始图像进行了性能比较。实验结果表明，在各向异性扩散的帮助下，噪声可以得到有效的抑制，即使有很大的衰减，效果也很好。这些结果极大地肯定了热释电相机太赫兹成像在隐蔽目标探测领域的应用潜力。
A high-resolution large-area terahertz (THz) scanning imaging system is demonstrated based on a 124×124 pyroelectric array camera and a CO(2) pumped continuous-wave THz laser. By applying a scanning mechanism to the real-time imaging setup, images of large-area targets were accomplished. Self-made resolution charts were employed to test the resolution. In order to improve the image quality, the noise in the images was studied and modeled, and then the performance of several denoising methods was compared with real-time THz original images. The experimental results show that, with the help of anisotropic diffusion, noise can be effectively suppressed, and the results are visually pleasant even when there is great attenuation. Those results greatly confirm application potentials of THz imaging using pyroelectric cameras in the field of concealed object detection.