Extraction of bubble shape parameters in two-phase flow based on digital image processing

As the most common pattern of multi-phase flow, Gas/liquid two-phase bubble flow plays an important role in the study of the principle of Gas/liquid two-phase flow. For the rising bubble in Gas/liquid two-phase bubble flow, various kinds of digital image processing methods were introduced, and we disposed the bubble flow images using the digital image processing methods that appropriate for this study; Hough transformation method was introduced and used to extract the simulate ellipse parameters from bubble images, and this parameters could provide the data foundation for further study of the principle of Gas/liquid two-phase flow.