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 68(2), p.144–158
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 en
ISSN
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 否
國別 JPN
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/116040 )

SDGS 夥伴關係,優質教育,潔淨水與衛生,產業創新與基礎設施