The paper gets some information about the outlines, velocity, areas, and change of gas films and internal contracts of balls in different sizes by using subtract operation, binary image, fill holes of images, and so on.

• 通过利用差影算法减少背景噪声、图像的二值化处理和填充处理、气泡特征分析、气泡中心坐标的确定等得到两相流中气泡、液滴和颗粒的尺寸和运动速度以及气膜分布等两相流重要参数。