Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (48): 9031-9034.doi: 10.3969/j.issn.1673-8225.2011.48.025

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Ultrasound image enhancement based on homomorphic filter and histogram equalization

Liu Yan-jun, Liu Qi   

  1. Department of Medical Information Engineering, Electrical Engineering & Information School of Sichuan University, Chengdu  610065, Sichuan Province, China
  • Received:2011-05-04 Revised:2011-10-14 Online:2011-11-26 Published:2011-11-26
  • Contact: Liu Qi, Doctor, Associate professor, Master’s supervisor, Department of Medical Information Engineering, Electrical Engineering & Information School of Sichuan University, Chengdu 610065, Sichuan Province, China liuqii@scu.edu.cn
  • About author:Liu Yan-jun★, Studying for master’s degree, Department of Medical Information Engineering, Electrical Engineering & Information School of Sichuan University, Chengdu 610065, Sichuan Province, China Liuyanjun9999@163.com

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Abstract:

BACKGROUND: Homomorphic filter and histogram equalization can enhance the image, but they still have many disadvantages.
OBJECTIVE: To observe the effects of homomorphic filtering and histogram equalization on image enhancement in order to reduce the shortcomings of the two methods individually.
METHOS: In frequency domain, firstly, ultrasound images were processed separately by using high pass homomorphic filter and low pass homomorphic filter. Two filtered images after linear combination were processed with global histogram equalization. Then the final enhancement supersonic images were obtained.
RESULTS AND CONCLUTION: The boundary of ultrasound images was very prominent and evident, and the overall visual effect was more bright and clear. Root mean square error and signal to noise ratio data were obtained by analysis and comparison, which confirmed the methods of ultrasound image enhancement in this article are very effective.

CLC Number: