Semi-Optimal Edge Detector based on Simple Standard Deviation with Adjusted Thresholding

TL;DR

This paper introduces a semi-optimal edge detection method that combines median filtering and standard deviation thresholding to improve edge detection accuracy in noisy images.

Contribution

It presents a novel edge detection technique using median filtering and standard deviation with adjusted thresholding, enhancing detection in noisy images.

Findings

Effective noise reduction via median filter

Accurate edge detection using standard deviation thresholding

Improved visual edge detection results

Abstract

This paper proposes a novel method which combines both median filter and simple standard deviation to accomplish an excellent edge detector for image processing. First of all, a denoising process must be applied on the grey scale image using median filter to identify pixels which are likely to be contaminated by noise. The benefit of this step is to smooth the image and get rid of the noisy pixels. After that, the simple statistical standard deviation could be computed for each 2X2 window size. If the value of the standard deviation inside the 2X2 window size is greater than a predefined threshold, then the upper left pixel in the 2?2 window represents an edge. The visual differences between the proposed edge detector and the standard known edge detectors have been shown to support the contribution in this paper.