篇名 | Automatic Polyp Recognition from Colonoscopy Images Based on Bag of Visual Words |
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卷期 | 16:1 |
作者 | Zhe Guo 、 Xin Zhu 、 Qin Li 、 Daiki Nemoto 、 Daisuke Takayanagi 、 Masato Aizawa 、 Noriyuki Isohata 、 Kenichi Utano 、 Kensuke Kumamoto 、 Shungo Endo 、 Kazutomo Togashi |
頁次 | 069-081 |
關鍵字 | Bag of visual words 、 colorectal cancer 、 colonoscopy 、 region of interest 、 Scopus |
出刊日期 | 201906 |
DOI | 10.6703/IJASE.201906_16(1).069 |
Colorectal cancer (CRC) is one of the most popular cancer in the world. Adenoma and sessile serrated polyp precursor lesions claim over 95% of CRC. The incidence of CRC is reduced 76-90% through the early diagnosis and removal of colorectal polyps. Colonoscopy is the golden standard for the detection of colorectal polyps but about 25% of polyps were missed during colonoscopy examinations. In this study, we proposed a novel method to recognize polyps from colonoscopy images based on bag-of-visual-words (BoW) with extracted regions of interest. The proposed method generates a histogram of visual word occurrences to represent an image, and uses support vector machine (SVM) with error correcting output codes (ECOC) for the detection of polyps. A dataset composed of 131 cases’ clinical data were used to train and test the proposed method. Validation demonstrates an average specificity of 97.8±1.5%, an average sensitivity of 97.2±1.7%, and an average accuracy of 97.5±1.0%.