Guoguang Mu

Publications (5)4.07 Total impact

• Article: Analyses and calculations of noise in optical coherence tomography systems

  Xianong Zhu, Yanmei Liang, Youxin Mao, Yaqing Jia, Yiheng Liu, Guoguang Mu
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  ABSTRACT: Significant progress has been made in the study of optical coherence tomography (OCT) - a non-invasive, high resolution, and in vivo diagnostic method for medical imaging applications. In this paper, the principles of noise analyses for OCT systems have been described. Comparisons are made of signal-to-noise ratios for both balanced and unbalanced detection schemes under the ideal no-stray light situation as well as the non-ideal situation where residual reflections and scatterings are presented. Numerical examples of noise calculation accompanied by detailed comparison of the main characteristics of both time-domain and frequency-domain OCT systems are also presented. It is shown that a larger dynamic range can be achieved for a Fourier-domain OCT system even under the circumstances of high-speed image acquisition. The main results presented in this paper should be useful for the development of high performance OCT systems.
  Frontiers of Optoelectronics in China 04/2012; 1(3):247-257.
• Article: Shape description matrix and its applications to color-image retrieval and recognition

  Yi Wang, Hongchen Zhai, Yanmei Liang, Siyuan Zhang, Guoguang Mu
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  ABSTRACT: Shape description matrix (SDM) describing regional pixel distribution characteristics of images is defined, with both radial and angular distribution messages taken into account to offer a comprehensive and exact description of the shape characteristics even upon a blurred edge. Using this SDM, a general color histogram (GCH) is developed. Both theoretical and experimental results show that the GCH can be applied to color-image retrievals and recognitions with a high efficiency.
  Science in China Series E Technological Sciences 04/2012; 47(2):159-165. · 1.02 Impact Factor
• Article: Deconvolution methods for image deblurring in optical coherence tomography.

  Yiheng Liu, Yanmei Liang, Guoguang Mu, Xiaonong Zhu
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  ABSTRACT: Two-dimensional deconvolution methods are proposed to deblur optical coherence tomography images. One employs a two-dimensional deconvolution with a matrix given by the product of the longitudinal and transversal point-spread functions as its kernel, which can be taken as the general point-spread function of an optical coherence tomography system. The other uses two one-dimensional deconvolutions with the longitudinal and transversal point-spread functions successively. It is shown that the two deconvolution methods can deblur the experimentally obtained optical coherence tomography images effectively.
  Journal of the Optical Society of America A 02/2009; 26(1):72-7. · 1.56 Impact Factor
• Article: Color-image retrieval based on fuzzy correlation.

  Hongchen Zhai, Yanmei Liang, Guoguang Mu
  Science in China Series F: Information Sciences. 01/2004; 47:295-300.
• Article: Collimation test of a corrected laser diode beam using lateral shearing interferometer

  Yi Wang, Hongchen Zhai, Suganda Jutamulia, Guoguang Mu
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  ABSTRACT: A lateral shearing interferometer is used for testing and verifying the collimation of a corrected laser diode beam. The laser diode beam is corrected to be circular and free from astigmatism using a previously proposed lens correcting system.
  Optics Communications 274(2):412-416. · 1.49 Impact Factor