C. Li-zhi

Publications37
h-index6
Citations174
Highly Influential Citations5
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A new fourth-order iterative method for finding multiple roots of nonlinear equations
In this paper, we present a new fourth-order method for finding multiple roots of nonlinear equations. It requires one evaluation of the function and two of its first derivative per iteration.… Expand
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Image quality assessment using natural image statistics in gradient domain
Abstract It is a challenging work to find an efficient metric of image quality assessment, which is an important approach for many image processing tasks. In this paper, we propose a novel reduced… Expand
  • 21
  • 1
Study on Digital Elevation Mode Data Watermark via Integer Wavelets
TLDR
An efficient approach via wavelet for digital watermark in DEM(digital elevation mode) data is developed, which effectly protects the copyright of DEM data and avoids the unauthoritative user. Expand
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An Image Quality Measure Scheme in the Perceptual Field via Masking
TLDR
This paper analyzed the characters of Human Visual System (HVS) at first, that included the visual nonlinear, multi-channel and masking effect as well, then constituted a kind of mathematic model to simulate the course that the human visual system proceeds the image information. Expand
  • 6
  • 1
Neighbourhood weighted fuzzy c-means clustering algorithm for image segmentation
Fuzzy c-means (FCM) clustering algorithm has been widely used in image segmentation. In this study, a modified FCM algorithm is presented by utilising local contextual information and structure… Expand
  • 32
Research on Teaching Reform of Advanced Numerical Analysis
TLDR
In this paper,we analyze the characteristics of graduate public course-Advaced Numerical Analysis,and do some research on the issue concerning teaching content,teaching means and examination mode. Expand
  • 1
Lossless watermarking for digital elevation mode data
A blind lossless watermarking method for Digital Elevation Mode(DEM) data via modifying the generalized histogram of the DEM data is presented.Puts forward the concepts of the generalized histogram… Expand
  • 3
The Image Denoising with Correlation Based on Redundant Contourlet Transform
Contourlet transform(CT) is a method of multiscale geometric analysis,which can result in a flexible multi-resolution,local,and directional image expansion.But the Contourlet transform is not… Expand
  • 3
Double sparse image representation via learning dictionaries in wavelet domain
TLDR
A novel structured dictionary training algorithm is proposed for double sparse image representation with zero-tree structure of wavelet coefficients. Expand
  • 2
Asymmetric watermarking based on Contourlet transform and subspace projection
TLDR
For the copyright protection of the digital image,a new asymmetric watermarking method of feature subspace projection based on Contourlet transform was presented. Expand
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