@Article{cmes.2022.019006,
AUTHOR = {Shouming Hou, Chaolan Jia, Kai Li, Liya Fan, Jincheng Guo, Mackenzie Brown},
TITLE = {Edge Detection of COVID-19 CT Image Based on GF_SSR, Improved Multiscale Morphology, and Adaptive Threshold},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {132},
YEAR = {2022},
NUMBER = {1},
PAGES = {81--94},
URL = {http://www.techscience.com/CMES/v132n1/48085},
ISSN = {1526-1506},
ABSTRACT = {Edge detection is an effective method for image segmentation and feature extraction. Therefore, extracting weak
edges with the inhomogeneous gray of Corona Virus Disease 2019 (COVID-19) CT images is extremely important.
Multiscale morphology has been widely used in the edge detection of medical images due to its excellent boundary
detection accuracy. In this paper, we propose a weak edge detection method based on Gaussian filtering and singlescale Retinex (GF_SSR), and improved multiscale morphology and adaptive threshold binarization (IMSM_ATB).
As all the CT images have noise, we propose to remove image noise by Gaussian filtering. The edge of CT images is
enhanced using the SSR algorithm. In addition, based on the extracted edge of CT images using improved Multiscale
morphology, a particle swarm optimization (PSO) algorithm is introduced to binarize the image by automatically
getting the optimal threshold. To evaluate our method, we use images from three datasets, namely COVID-19,
Kaggle-COVID-19, and COVID-Chestxray, respectively. The average values of results are worthy of reference, with
the Shannon information entropy of 1.8539, the Precision of 0.9992, the Recall of 0.8224, the F-Score of 1.9158,
running time of 11.3000. Finally, three types of lesion images in the COVID-19 dataset are selected to evaluate
the visual effects of the proposed algorithm. Compared with the other four algorithms, the proposed algorithm
effectively detects the weak edge of the lesion and provides help for image segmentation and feature extraction.},
DOI = {10.32604/cmes.2022.019006}
}