Threshold selection using Renyi's entropy

A laser back-lighting based metal transfer monitoring system for robotic gas metal arc welding

“…The segmentation accuracy is verified by the previously justified method [12][13][14]. The advantage of the double-threshold method over other threshold selection methods [15][16][17][18][19][20][21][22] is its better accuracy in segmenting fuzzy images. The advantage of the double-threshold method over the previous angle-edge method [12][13][14] is its better efficiency and all sidedness.…”

“…As the most widely used segmentation method for gray-scale images, automatic threshold selection method has been studied extensively in the past decades [15][16][17][18][19][20][21][22]. We choose the most popular ones to segment the enhanced images.…”

“…As can be seen, accurately determining the two thresholds, T 1 and T 2 is critical for the accurate segmentation of the droplet. From the state of art literatures [15][16][17][18][19][20][21][22], we could not find any automatic method that is capable of computing two thresholds for one image simultaneously and accurately. In the past research [13], a flexible threshold selection method has been proposed to compute multiple thresholds simultaneously and robustly.…”

“…The variability of arc plasma in the arc welding causes the variability of the pixel intensity and fuzziness at the edges. To deal with the fuzziness effectively, [12] and [14] have proposed a second order model to fit the detected edges and compute the position and size of the droplet more accurately than threshold segmentation methods [15][16][17][18][19][20][21][22]. In this paper, we will introduce a linear membership function to deal with the fuzzy edge of the droplet and then propose a double-threshold segmentation method in Section 5.…”

Comparative Performance Evaluation of Entropic Thresholding Algorithms Based on Shannon, Renyi and Tsallis Entropy Definitions for Electrical Capacitance Tomography Measurement Systems

“…The first use of Renyi entropy in image thresholding was introduced by Sahoo et al [50]. Their implementation follows a similar approach of maximum entropy as proposed by Kapur (see equation 11).…”