Motion parameters of metal droplet ejection are analyzed and calculated.High-speed video camera is used to capture the whole process of metal droplets dropping

impacting the substrate and solidifying.The contour and center of mass of micro-droplets in image sequence are extracted by image processing method

and the relationship between the two coordinate systems is established according to the size of micro-droplets in the real coordinate system and the pixel size in the image coordinate system.The velocity curves along x-axis and y-axis

the slip distance along horizontal direction and the droplet expansion factor are analyzed and calculated

and the indicators are displayed in the form of images.Finally

the software is developed by using Python development language

OpenCV image processing library and PyQt interface development library.