教師資料查詢 | 類別: 期刊論文 | 教師: 蔡奇謚 Chi-yi Tsai (瀏覽個人網頁)

標題:Image Segmentation of Activated Sludge Phase Contrast Images Using Phase Stretch Transform
學年107
學期1
出版(發表)日期2018/11/29
作品名稱Image Segmentation of Activated Sludge Phase Contrast Images Using Phase Stretch Transform
作品名稱(其他語言)
著者Raymond Bing Quan Ang; Humaira Nisar; Muhammad Burhan Khan; Chi-Yi Tsai
單位
出版者
著錄名稱、卷期、頁數Microscopy, dfy134, p.1-15
摘要Activated sludge (AS) is a biological treatment process that is employed in wastewater treatment plants. Filamentous bacteria in AS plays an important role in the settling ability of the sludge. Proper settling of the sludge is essential for normal functionality of the wastewater plants, where filamentous bulking is always a persistent problem preventing sludge from settling. The performance of AS plants is conventionally monitored by physico-chemical procedures. An alternative way of monitoring the AS in wastewater treatment process is to use image processing and analysis. Good performance of the image segmentation algorithms is important to quantify flocs and filaments in AS. In this article, an algorithm is proposed to perform segmentation of filaments in the phase contrast images using phase stretch transform. Different values of strength (S) and warp (W) are tested to obtain optimum segmentation results and decrease the halo and shade-off artefacts encountered in phase contrast microscopy. The performance of the algorithm is assessed using DICE coefficient, accuracy, false positive rate (FPR), false negative rate (FNR) and Rand index (RI). Sixty-one gold approximations of ground truth images were manually prepared to assess the segmentation results. Thirty-two of them were acquired at 10× magnification and 29 of them were acquired at 20× magnification. The proposed algorithm exhibits better segmentation performance with an average DICE coefficient equal to 52.25%, accuracy 99.74%, FNR 41.8% and FPR 0.14% and RI 99.49%, based on 61 images.
關鍵字phase contrast image;image segmentation;phase stretch transform;wastewater treatment;activated sludge;filamentous bacteria
語言英文
ISSN
期刊性質國外
收錄於
產學合作
通訊作者
審稿制度
國別日本
公開徵稿
出版型式,電子版
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