Molten-state suspended ellipsoidal droplet image processing algorithm based on dual-camera vision

A molten-state suspended ellipsoidal droplet image processing method based on dual-camera vision, comprising the following steps:

• (1) acquiring standard sphere images of a standard sphere by means of two cameras, and calculating the actual size corresponding to each individual pixel of the acquired standard sphere images of the two cameras;
• (2) synchronously acquiring two images of a droplet by using the two cameras making a specified included angle;
• (3) establishing an ellipsoidal quadric surface equation for the droplet, respectively detecting edge contour lines of the two images, and establishing elliptical contour line equations of the edge contour lines;
• (4) introducing the specified included angle, and constructing an equation set according to relationships between parameters of the two elliptical contour line equations and the ellipsoidal quadric surface equation;
• (5) solving the equation set, and calculating the length of each semi-axis of the droplet;
• and
• (6) calculating the volume of the droplet according to the length of each semi-axis, wherein
• step (3) further comprises:
• constructing the ellipsoidal quadric surface equation for the droplet by using a symmetric positive definite matrix;
• adopting the Otsu method to calculate a threshold to binarize each image, detecting an edge contour line of each image by the Sobel edge detection algorithm, and constructing an elliptical contour line equation for each edge contour line;
• regarding each image as an image on a respective y-z plane, and extracting a coordinate set of each point on each edge contour line;
• and
• obtaining an estimated value of each parameter in each elliptical contour line equation by adopting the least squares method,
• wherein the droplet is formed into the shape of a rotating ellipsoid;
• and
• in step (6), all the semi-axes are classified into first semi-axes and second semi-axes by using a cluster analysis algorithm, and respective mean values of the first semi-axes and the second semi-axes are calculated.