FIELD: measurement of coordinates of objects located in liquid.
SUBSTANCE: proposed method includes recording image of object from several positions, identification of image points and calculation of their spatial coordinates. Three reference contrast points are placed on surface of liquid at fixed distance between them; then, image of reference points and object is recorded through surface of liquid, coordinates of reference points and points of object are measured in coordinate system of image, external parameters of orientation of image relative to surface of liquid are calculated, coordinates of points of object are calculated in objective coordinate system on basis of photos taking into account refracting factors of liquid.
EFFECT: enhanced accuracy of measurement due to taking into account refracting properties of liquid.
4 dwg
