[1] H. Ge, B. Wang, W. Ji, J. Wei, L. Wang, Z. Huang. Photorefractive edge-enhancement and its application to pattern recognition. Proc. SPIE, 5280, 777-784(2004).

[2] A. Jesacher, S. Furhapter, S. Bernet, M. Ritsch-Marte. Shadow effects in spiral phase contrast microscopy. Phys. Rev. Lett., 94, 233902(2005).

[3] P. Nisthula, R. Yadhu. A novel method to detect bone cancer using image fusion and edge detection. Int. J. Eng. Comp. Sci., 2, 2012-2018(2013).

[4] F. Qadir, M. Peer, K. Khan. Efficient edge detection methods for diagnosis of lung cancer based on two-dimensional cellular automata. Adv. Appl. Sci. Res., 3, 2050-2058(2012).

[5] M. Diwakar, P. K. Patel, K. Gupta. Cellular automata based edge-detection for brain tumor. International Conference on Advances in Computing, Communications and Informatics, 53-59(2013).

[6] D. Lu, X.-H. Yu, X. Jin, B. Li, Q. Chen, J. Zhu. Neural network based edge detection for automated medical diagnosis. IEEE International Conference on Information and Automation, 343-348(2011).

[7] F. Zernike. Phase contrast, a new method for the microscopic observation of transparent objects. Physica, 9, 686-698(1942).

[8] T. Zhu, Y. Zhou, Y. Lou, H. Ye, M. Qiu, Z. Ruan, S. Fan. Plasmonic computing of spatial differentiation. Nat. Commun., 8, 15391(2017).

[9] A. Grossmann, S. Albeverio, P. Blanchard, M. Hazewinkel, L. Streit. Wavelet transforms and edge detection. Stochastic Processes in Physics and Engineering, 149-157(1988).

[10] K. Kohlmann. Corner detection in natural images based on the 2-D Hilbert transform. Sig. Process., 48, 225-234(1996).

[11] M. Ritsch-Marte. Orbital angular momentum light in microscopy. Phil. Trans. R. Soc. A, 375, 20150437(2017).

[12] X. D. Qiu, F. S. Li, W. H. Zhang, Z. H. Zhu, L. X. Chen. Spiral phase contrast imaging in nonlinear optics: seeing phase objects using invisible illumination. Optica, 5, 208-212(2018).

[13] S.-K. Liu, C. Yang, S.-L. Liu, Z.-Y. Zhou, Y. Li, Y.-H. Li, Z.-H. Xu, G.-C. Guo, B.-S. Shi. Up-conversion imaging processing with field-of-view and edge enhancement. Phys. Rev. Appl., 11, 044013(2019).

[14] S. Fürhapter, A. Jesacher, S. Bernet, M. Ritsch-Marte. Spiral phase contrast imaging in microscopy. Opt. Express, 13, 689-694(2005).

[15] J. Feinberg. Real-time edge enhancement using the photorefractive effect. Opt. Lett., 5, 330-332(1980).

[16] J. Huignard, J. Herriau. Real-time coherent object edge reconstruction with Bi₁₂SiO₂₀ crystals. Appl. Opt., 17, 2671-2672(1978).

[17] J. O. White, A. Yariv. Real-time image processing via four-wave mixing in a photorefractive medium. Landmark Papers on Photorefractive Nonlinear Optics, 455-457(1995).

[18] C.-S. Guo, Y.-J. Han, J.-B. Xu, J. Ding. Radial Hilbert transform with Laguerre–Gaussian spatial filters. Opt. Lett., 31, 1394-1396(2006).

[19] Y. Zhou, S. Feng, S. Nie, J. Ma, C. Yuan. Image edge enhancement using Airy spiral phase filter. Opt. Express, 24, 25258-25268(2016).

[20] L. V. Wang, H.-I. Wu. Biomedical Optics: Principles and Imaging(2012).

[21] J. W. Goodman. Speckle Phenomena in Optics: Theory and Applications(2007).

[22] Z. Ding, H. Ren, Y. Zhao, J. S. Nelson, Z. Chen. High-resolution optical coherence tomography over a large depth range with an axicon lens. Opt. Lett., 27, 243-245(2002).

[23] P. Lai, X. Xu, H. Liu, Y. Suzuki, L. V. Wang. Reflection-mode time-reversed ultrasonically encoded optical focusing into turbid media. J. Biomed. Opt., 16, 080505(2011).

[24] Y. Liu, P. Lai, C. Ma, X. Xu, A. A. Grabar, L. V. Wang. Optical focusing deep inside dynamic scattering media with near-infrared time-reversed ultrasonically encoded (TRUE) light. Nat. Commun., 6, 5904(2015).

[25] C. Ma, F. Zhou, Y. Liu, L. V. Wang. Single-exposure optical focusing inside scattering media using binarized time-reversed adapted perturbation. Optica, 2, 869-876(2015).

[26] I. M. Vellekoop, A. Mosk. Focusing coherent light through opaque strongly scattering media. Opt. Lett., 32, 2309-2311(2007).

[27] Z. Yaqoob, D. Psaltis, M. S. Feld, C. Yang. Optical phase conjugation for turbidity suppression in biological samples. Nat. Photonics, 2, 110-115(2008).

[28] I. M. Vellekoop, M. Cui, C. Yang. Digital optical phase conjugation of fluorescence in turbid tissue. Appl. Phys. Lett., 101, 081108(2012).

[29] K. Si, R. Fiolka, M. Cui. Fluorescence imaging beyond the ballistic regime by ultrasound-pulse-guided digital phase conjugation. Nat. Photonics, 6, 657-661(2012).

[30] J.-H. Park, Z. Yu, K. Lee, P. Lai, Y. Park. Perspective: wavefront shaping techniques for controlling multiple light scattering in biological tissues: toward in vivo applications. APL Photon., 3, 100901(2018).

[31] H. Liu, X. Xu, P. Lai, L. V. Wang. Time-reversed ultrasonically encoded optical focusing into tissue-mimicking media with thickness up to 70 mean free paths. J. Biomed. Opt., 16, 086009(2011).

[32] Z. Yu, M. Xia, H. Li, T. Zhong, F. Zhao, H. Deng, Z. Li, D. Li, D. Wang, P. Lai. Implementation of digital optical phase conjugation with embedded calibration and phase rectification. Sci. Rep., 9, 1537(2019).

[33] Z. Yu, J. Huangfu, F. Zhao, M. Xia, X. Wu, X. Niu, D. Li, P. Lai, D. Wang. Time-reversed magnetically controlled perturbation (TRMCP) optical focusing inside scattering media. Sci. Rep., 8, 2927(2018).

[34] Y. Liu, C. Ma, Y. Shen, J. Shi, L. V. Wang. Focusing light inside dynamic scattering media with millisecond digital optical phase conjugation. Optica, 4, 280-288(2017).

[35] D. Wang, E. H. Zhou, J. Brake, H. Ruan, M. Jang, C. Yang. Focusing through dynamic tissue with millisecond digital optical phase conjugation. Optica, 2, 728-735(2015).

[36] E. F. Donnelly, R. R. Price, D. R. Pickens. Quantification of the effect of system and object parameters on edge enhancement in phase-contrast radiography. Med. Phys., 30, 2888-2896(2003).

[37] E. F. Donnelly, R. R. Price. Quantification of the effect of kVp on edge-enhancement index in phase-contrast radiography. Med. Phys., 29, 999-1002(2002).

[38] C. Ma, X. Xu, Y. Liu, L. V. Wang. Time-reversed adapted-perturbation (TRAP) optical focusing onto dynamic objects inside scattering media. Nat. Photonics, 8, 931-936(2014).