A process for the correction of a volume imaging equation for determining a velocity field of particles in a volume

摘要

The object of the invention is a process for the correction of a volume imaging equation for more accurate determination of a velocity field of particles in a volume, wherein the volume of at least two cameras is taken from different directions, in which first phase including a coarse calibration of the position of the cameras to one another and relative to the volume to be taken into account by determining a illustration equation takes place, the coordinates (x, y, z) of a point in the volume of the corresponding camera image coordinates x_i, y_i of each camera i, wherein then simultaneously by all cameras in an unchanged position particles in a volume to be absorbed, wherein on the basis of the determined position x_i, y_i a particle in the camera images by means of a known triangulation method the position (x, y, z) of this particle in the volume is determined by approximation, and, by means of the original abbilungsgleichung this position (x, y, z) to a position x_i'', y_i'' in the camera images of the at least two cameras, with from the difference (dx_i, dy_i) between the coordinates (x_i, y_i) and (x_i'', y_i'') a correction factor for the illustration equation is calculated so that, with the corrected illustration equation for all cameras i of the point (x_i, y_i) identical to the point (x_i'', y_i'') the other, whereby this correction for many particles takes place in the volume.