scholarly journals Enhancement of digital chest images using a modified Sobel edge detection algorithm

2021 ◽  
Vol 24 (3) ◽  
pp. 1718
Author(s):  
Archana J. N. ◽  
Aishwarya P. ◽  
Hanson Joseph
Keyword(s):  
Edge Detection ◽  
Detection Algorithm ◽  
Interstitial Lung Diseases ◽  
Internal Organs ◽  
Edge Detection Algorithm ◽  
Sobel Operator ◽  
Digital Chest ◽  
Sobel Edge Detection ◽  
The Laplace Operator ◽  
Lung Ct

Computed tomography (CT) images are an essential factor in the diagnosing procedure for various diseases affecting the internal organs. Edge detection can be used for the appropriate enhancement of the lung CT scan images for the diagnosis of the various interstitial lung diseases (ILD). In order to solve the issues of edge detection provided by the traditional Sobel operator, the paper proposes a Sobel 12D edge detection algorithm which uses the additional direction templates for the better identification of the edge details. First, the vertical and horizontal directions available in the traditional Sobel operator are extended to few more directions (a total of 12 directions) which enhances the edge extraction ability. Next part, compute the edge detected image using the Sobel 12D, Laplace, Prewitt, Robert’s Cross and Scharr operators for edge detection separately. It is followed by image fusion method which optimizes the edge detection by combining the edge detected images obtained using the Sobel 12D approach and the Laplace operator. The experimental results shows that the proposed algorithms generates a better detection of the edges than the other edge detection operators.

scholarly journals Research on edge detection algorithm based on improved sobel operator

2020 ◽  
Vol 309 ◽  
pp. 03031
Author(s):  
Lili Han ◽  
Yimin Tian ◽  
Qianhui Qi
Keyword(s):  
Edge Detection ◽  
Mathematical Morphology ◽  
Detection Algorithm ◽  
Noise Sensitivity ◽  
Edge Detection Algorithm ◽  
Sobel Operator ◽  
Edge Location ◽  
Image Edge ◽  
Sobel Edge Detection ◽  
Suppress Noise

In order to solve the shortcomings of traditional Sobel edge detection operator, such as low accuracy of image edge location and rough edge extracted, an improved edge detection algorithm based on Sobel operator is proposed. Firstly, in the aspect of the accuracy of edge detection, the direction template is increased from two directions of horizontal and vertical to eight directions; secondly, in terms of the rough edge extracted and the noise sensitivity, combined with the operation of mathematical morphology, the edge can be refined, and at the same time, some part of the noise can be suppressed. The experiment results show that the improved edge detection algorithm has a better accuracy in image positioning, and a certain ability to suppress noise. Finally, the detected image edge of the image is more delicate and clear than the traditional Sobel operator.

scholarly journals Hardware Implementation of Sobel Edge Detection Algorithm

2020 ◽  
Vol 32 ◽  
pp. 03051
Author(s):  
Ankita Pujare ◽  
Priyanka Sawant ◽  
Hema Sharma ◽  
Khushboo Pichhode
Keyword(s):  
Image Processing ◽  
Edge Detection ◽  
Feature Detection ◽  
Hardware Implementation ◽  
Software Tool ◽  
Detection Algorithm ◽  
Edge Detection Algorithm ◽  
Detection Algorithms ◽  
Sobel Edge Detection ◽  
Image Edges

In the fields of image processing, feature detection, the edge detection is an important aspect. For detection of sharp changes in the properties of an image, edges are recognized as important factors which provides more information or data regarding the analysis of an image. In this work coding of various edge detection algorithms such as Sobel, Canny, etc. have been done on the MATLAB software, also this work is implemented on the FPGA Nexys 4 DDR board. The results are then displayed on a VGA screen. The implementation of this work using Verilog language of FPGA has been executed on Vivado 18.2 software tool.

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