NDLI: Optimised halftoning and inverse halftoning of dermoscopic images for supporting teledermoscopy system

Content Provider	IET Digital Library
Author	Ashour, Amira S. Guo, Yanhui Hawas, Ahmed Refaat Du, Chunlai
Abstract	Telemedicine systems require reliable, small size, and secure transmission. In teledermoscopy, the transmission of the traditional large size dermoscopic images leads to heavy consumption of storage space and bandwidth congestion, which impairs the efficient use of the transmission channel bandwidth. Furthermore, halftoning and inverse halftoning have a great practical impact in the reduction of the images’ size. For teledermoscopy, the present work optimises the error filter during the error diffusion process to generate the halftone dermoscopic images with small size. The proposed inverse halftone optimises two parameters during the integration between the regularised inverse filter and the DLPA-ICI (directional local polynomial approximation and the intersection of confidence intervals) estimator's kernel. The optimised kernel parameter determines the best window size of the kernel in the restored image estimation. The experimental results included comparative studies in terms of several image quality metrics and the average size reduction in percentage when using the genetic algorithm for optimisation with Jarvis error diffusion for halftone images generation. The achieved average size reduction is 92.15% using the proposed method compared to the average dermoscopic images’ size in the test set on 900 images showing the superiority of the proposed method.
Starting Page	529
Ending Page	536
Page Count	8
ISSN	17519659
Volume Number	13
e-ISSN	17519667
Issue Number	Issue 3, Feb (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/13/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2018.6166
Journal	IET Image Processing
Publisher Date	2018-12-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Biology And Medical Computing Biomedical Measurement And Imaging Computer Vision And Image Processing Technique Directional Local Polynomial Approximation And The Intersection of Confidence Intervals DLPA-ICI Estimator Error Diffusion Process Error Filter Filtering Method in Signal Processing Genetic Algorithm Halftone Dermoscopic Image Halftone Image Generation Health Physics Image Colour Analysis Image Enhancement Image Filtering Image Quality Metrics Image Resolution Image Restoration Interpolation And Function Approximation Inverse Filter Inverse Halftoning Jarvis Error Diffusion Kernel Parameter Optimization Medical And Biomedical Uses of Field Medical Image Processing Numerical Analysis Numerical Approximation And Analysis Optical, Image And Video Signal Processing Optimisation Technique Patient Diagnostic Method And Instrumentation Polynomial Approximation Radiations Radioactivity Skin Teledermoscopy System Telemedicine Telemedicine System
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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