New Method of Reverse Neighbour Counts in Unsupervised Outlier Detection
Abstract
: Outlier detection is the process of finding outlying pattern from a given dataset. Outlier detection became important subject in different knowledge domains. Data size is getting doubled every years there is a need to detect outliers in large datasets as early as possible. In high-dimensional data outlier detection presents various challenges because of curse of dimensionality. By examining again the notion of reverse nearest neighbors in the unsupervised outlier-detection context, high dimensionality can have a different impact. In high dimensions it was observed that the distribution of points in reverse-neighbor counts becomes skewed .This proposed work aims at developing and comparing some of the unsupervised outlier detection methods and propose a way to improve them. This proposed work goes in details about the development and analysis of outlier detection algorithms such as Local Outlier Factor(LOF), Local Distance-Based Outlier Factor(LDOF) , Influenced Outliers and .The concepts of these methods are then combined to implement a new method with distributed approach which improves the results of the previous mentioned ones with reference to speed, complexity and accuracy.
Full Text:
PDFCopyright (c) 2016 S. RAJESH, D. BASAVARAJU
![Creative Commons License](http://licensebuttons.net/l/by-nc-sa/4.0/88x31.png)
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
All published Articles are Open Access at https://journals.pen2print.org/index.php/ijr/
Paper submission: ijr@pen2print.org