Ping Li

Work place: School of Information Engineering and Digital Medical Image Technique Research Center, Zhengzhou University, Zhengzhou, China



Research Interests: Image Processing, Image Compression


Ping Li received the bachelor degree in electronic and information engineering from the PLA Information Engineering University. In 2010, she joined Zhengzhou University, as a master student of the school of information engineering. Her current research interests are image compression and image processing. She is a member of Digital Imaging Technology Research Center, Zhengzhou University.

Author Articles
A Novel Method to Improve the Visual Quality of X-ray CR Images

By Huiqin Jiang Zhongyong Wang Ling Ma Yumin Liu Ping Li

DOI:, Pub. Date: 8 Jun. 2011

The aim of this study is to improve the visual quality of x-ray CR images displayed at general displays. Firstly, we investigate a series of wavelet-based denoising methods for removing quantum noise remains in the original images. The denoised image is obtained by using the scheme of wavelet thresholding, where the best suitable wavelet and level are chosen based on theory analysis. Secondly, the image contrast is enhanced using Gamma correction. Thirdly, we improve unsharp masking method for enhancing some useful information and restraining other information selectively. Fourthly, we fuse the denoised image with the enhanced image. Fively, the used display is calibrated, so that it could offer full compliance with the Grayscale Standard Display Function (GSDF) defined in Digital Imaging and Communications in Medicine (DICOM) Part 14. Finally, we decide parameters of the image fusion, resulting in the diagnosis image. A number of experiments are performed over some x-ray CR images by using the proposed method. Experimental results show that this method can effectively reduce the quantum noise while enhancing the subtle details; the visual quality of X-ray CR images is highly improved.

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