Analysis of CT Images Using Quantum Edge Extraction Algorithm for the Assessment of Different Stages of COVID-19 Patient

2021 ◽  
pp. 797-807
Author(s):  
Rajib Chetia ◽  
Partha Pratim Sahu
Keyword(s):  
Ct Images ◽  
Edge Extraction ◽  
Extraction Algorithm

Camera Calibration Method Based on Circle Plane Board

2013 ◽  
Vol 475-476 ◽  
pp. 184-187
Author(s):  
Wen Guo Li ◽  
Shao Jun Duan
Keyword(s):  
Camera Calibration ◽  
Calibration Method ◽  
Lens Distortion ◽  
Edge Extraction ◽  
Circle Plane ◽  
Circle Centre ◽  
Extraction Algorithm ◽  
Calibration Algorithm ◽  
Characteristic Points ◽  
Distortion Parameters

We present a camera calibration method based on circle plane board. The centres of circles on plane are regarded as the characteristic points, which are used to implement camera calibration. The proposed calibration is more accurate than many previous calibration algorithm because of the merit of the coordinate of circle centre being obtained from thousand of of edge pionts of ellipse, which is very reliable to image noise caused by edge extraction algorithm. Experiments shows the proposed algorithm can obtain high precise inner parameters, and lens distortion parameters.

A Closed Point Cloud Edge Extraction Algorithm Using Edge Coefficient

2018 ◽  
Vol 55 (11) ◽  
pp. 111003
Author(s):  
韩玉川 Han Yuchuan ◽  
侯贺 Hou He ◽  
白云瑞 Bai Yunrui ◽  
朱险峰 Zhu Xianfeng
Keyword(s):  
Point Cloud ◽  
Edge Extraction ◽  
Closed Point ◽  
Extraction Algorithm

EDGE EXTRACTION ALGORITHM FOR FEATHER SEXING POULTRY CHICKS

1991 ◽  
Vol 34 (2) ◽  
pp. 0635-0640 ◽  
Author(s):  
P. T. Jones ◽  
S. A. Shearer ◽  
R. S. Gates
Keyword(s):  
Edge Extraction ◽  
Extraction Algorithm

An Extraction Algorithm for Image Edge Based on Multifractal Analysis

2011 ◽  
Vol 179-180 ◽  
pp. 554-557
Author(s):  
Da Hui Li ◽  
Ming Diao
Keyword(s):  
Selection Criteria ◽  
Multifractal Analysis ◽  
Edge Extraction ◽  
Fractal Image ◽  
Extraction Algorithm ◽  
Image Edge ◽  
Edge Based

In the paper, the first introduced multifractal features of image, and defined some measures; then described procedures of the edge extraction algorithm; the final analyses the results of experiment and selection criteria commonly used in multifractal, proposing a different multiple fractal image, the algorithm has excellent effect on edge extraction, highlights the detail information of the main edge.

An Edge Extraction Algorithm Based on Morphology

2012 ◽  
Vol 236-237 ◽  
pp. 1145-1151
Author(s):  
Qian Zhao ◽  
Guo Wei Kang ◽  
Yuan Bin Hou ◽  
Su Zhao
Keyword(s):  
New Method ◽  
Edge Extraction ◽  
Global Threshold ◽  
Extraction Algorithm

The background of images often obstructs the edge extraction.A new method of edge extraction is proposed in this paper, which combines classic edge extraction algorithms with optimal global threshold and the morphological dilation and restruction. It can accurately extract edges and eliminate fake edges and filter out the background well.

An Improved Edge Extraction Algorithm for Lithography Micrographs

2012 ◽  
Vol 190-191 ◽  
pp. 1109-1112
Author(s):  
Shan Shan Gong ◽  
Mu Jun Li
Keyword(s):  
Shape Error ◽  
Edge Extraction ◽  
Micro Structure ◽  
Basic Algorithm ◽  
Canny Operator ◽  
Detection Algorithms ◽  
Extraction Algorithm ◽  
Image Edge ◽  
Basic Image ◽  
Image Edges

For shape error analysis and correction of micro-structure in lithography, image edges should be extracted from micrographs of the structures. First several basic image edge detection algorithms are analyzed and compared. Then according to the unique conditions of micrographs in lithography experiments, an improved image edge extraction method is investigated. In this method Canny operator is selected as a basic algorithm, while the mathematical morphology is used in pre-processing for de-noising to reduce the uneven phenomenon. And an appropriate enhancement algorithm is used to enhance image contrast. Experimental results show that this method can extract the image edge from the micro-structure graphs effectively.

Weld Seam Edge Extraction Algorithm Based on Beamlet Transform

2008 ◽  
Author(s):  
Shuangcheng Deng ◽  
Lipei Jiang ◽  
Xiangdong Jiao ◽  
Long Xue ◽  
Yingyu Cao
Keyword(s):  
Weld Seam ◽  
Edge Extraction ◽  
Extraction Algorithm ◽  
Beamlet Transform
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