[1] Huang D, Swanson E, Lin C et al. Optical coherence tomography[J]. Science, 254, 1178-1181(1991).

[2] Xu M J, Yang J Z, Zhao D Z et al. An image-enhancement method based on variable-order fractional differential operators[J]. Bio-Medical Materials and Engineering, 26, S1325-S1333(2015).

[3] Rogowska J, Brezinski M E. Image processing techniques for noise removal, enhancement and segmentation of cartilage OCT images[J]. Physics in Medicine and Biology, 47, 641-655(2002).

[4] Chen Y, Li Z L, Nan N et al. Wavelength misalignment analysis and spectral calibration for Fourier domain polarization-sensitive optical coherence tomography[J]. Chinese Journal of Lasers, 45, 0207022(2018).

[5] He Q Y, Li Z L, Wang X Z et al. Automated retinal layer segmentation based on optical coherence tomographic images[J]. Acta Optica Sinica, 36, 1011003(2016).

[6] Yuan Z L, Chen J B, Huang W Y et al. Speckle noise reduction of optical coherence tomography based on robust principle component analysis algorithm[J]. Acta Optica Sinica, 38, 0511002(2018).

[7] Schmitt J M, Xiang S H, Yung K M. Speckle in optical coherence tomography[J]. Journal of Biomedical Optics, 4, 95-105(1999).

[8] Iftimia N, Bouma B E, Tearney G J. Speckle reduction in optical coherence tomography by “path length encoded” angular compounding[J]. Journal of Biomedical Optics, 8, 260-263(2003).

[9] Deng B H, Chen J H, Hu M H et al. Application and imaging processing algorithm of biospeckle technology in fruit quality detection[J]. Laser & Optoelectronics Progress, 56, 090003(2019).

[10] Thapa D, Raahemifar K, Lakshminarayanan V. Reduction of speckle noise from optical coherence tomography images using multi-frame weighted nuclear norm minimization method[J]. Journal of Modern Optics, 62, 1856-1864(2015). http://www.tandfonline.com/doi/full/10.1080/09500340.2015.1068392

[11] Duan J M, Lu W Q, Tench C et al. Denoising optical coherence tomography using second order total generalized variation decomposition[J]. Biomedical Signal Processing and Control, 24, 120-127(2016).

[12] Sudeep P V, Issac Niwas S, Palanisamy P et al. Enhancement and bias removal of optical coherence tomography images: an iterative approach with adaptive bilateral filtering[J]. Computers in Biology and Medicine, 71, 97-107(2016).

[13] Skala M C, Crow M J, Wax A et al. Photothermal optical coherence tomography of epidermal growth factor receptor in live cells using immunotargeted gold nanospheres[J]. Nano Letters, 8, 3461-3467(2008).

[14] Tucker-Schwartz J M, Meyer T A, Patil C A et al. In vivo imaging of gold nanorod contrast agents using photothermal optical coherence tomography[J]. Proceedings of SPIE, 8571, 85712C(2013).

[15] Jeon W, Jeong W, Son K et al. Speckle noise reduction for digital holographic images using multi-scale convolutional neural networks[J]. Optics Letters, 43, 4240-4243(2018).

[16] Cai X O, Ni X J. Study on reduction of speckle noise in reconstructed image of digital hologram[J]. Laser & Optoelectronics Progress, 50, 050901(2013).

[17] Zhou K C, Qian R, Degan S et al. Optical coherence refraction tomography[J]. Nature Photonics, 13, 794-802(2019).

[18] Rubinoff I, Beckmann L, Wang Y et al. Speckle reduction in visible-light optical coherence tomography using scan modulation[J]. Neurophotonics, 6, 041107(2019).

[19] Shi F, Cai N, Gu Y B et al. DeSpecNet: a CNN-based method for speckle reduction in retinal optical coherence tomography images[J]. Physics in Medicine and Biology, 64, 175010(2019).

[20] Chen H G, Fu S J, Wang H et al. Speckle reduction based on fractional-order filtering and boosted singular value shrinkage for optical coherence tomography image[J]. Biomedical Signal Processing and Control, 52, 281-292(2019).

[21] Tang P J, Liu S J, Chen J B et al. Cross-correlation photothermal optical coherence tomography with high effective resolution[J]. Optics Letters, 42, 4974-4977(2017).

[22] Mallat S G. A theory for multiresolution signal decomposition: the wavelet representation[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 11, 674-693(1989).

[23] Zhang C X, Chen M H, Wang F et al. Optical coherence tomography image denoising algorithm based on wavelet transform and fractional integral[J]. Laser & Optoelectronics Progress, 56, 181008(2019).

[24] Rogowska J, Brezinski M E. Evaluation of the adaptive speckle suppression filter for coronary optical coherence tomography imaging[J]. IEEE Transactions on Medical Imaging, 19, 1261-1266(2000).

[25] Wei W Y. New Ostu image segmentation based on intensity stretching on DWT fields[J]. Journal of Northwest Normal University (Natural Science), 45, 46-48(2009).