[1] [1] Li Qi, Yao Rui, Ding Shenghui, et al. Experiment on 2.52 THz transmission-mode imaging for concealed objects[J]. Chinese J Lasers, 2011, 38(7): 0711001. (in Chinese)

[2] [2] Zheng Xianhua, Wang Xinke, Sun Wenfeng, et al. Developments and applications of the terahertz digital holography[J]. Chinese J Lasers, 2014, 41(2): 0209003. (in Chinese)

[3] [3] Deng Chao, Xing Chunfei, Lü Mo, et al. CW THz standoff imaging[J]. Acta Optica Sinica, 2009, 29(Sl): 50-52. (in Chinese)

[4] [4] Cai Xiaoou, Ni Xiaojing. Study on reduction of speckle noise in reconstructed image of digital hologram[J]. Laser & Optoelectronics Progress, 2013, 50(050901): 1-6. (in Chinese)

[5] [5] Abolhassina M, Rostimi Y. Speckle noise reduction by divison and digital processing of a hologram[J]. Optik, 2012, 123(10): 937-939.

[6] [6] Weng Jiawen, Zhong Jingang, Hu Cuiying. Digital reduction of Fresnel hologram with a ridge of Gabor wavelet transform[J]. Acta Optica Sinica, 2009, 29(8): 2109-2114. (in Chinese)

[7] [7] Li Ziqin, Wang Qi, Li Qi, et al. Multiplication of speckle image and speckle suppression in imaging lidar[J]. Chinese J Lasers, 2003, 30(8): 717-720. (in Chinese)

[8] [8] Li Qi, Xue Kai, Li Yunda, et al. Experimental research on terahertz Gabor inline digital holography of concealed objects[J]. Applied Optics, 2012, 51(29): 7052-7058.