METHOD FOR MEASUREMENT OF SPATIAL COORDINATES OF POINTS OF OBJECT Russian patent published in 2021 - IPC G01B11/16 

FIELD: measuring.

SUBSTANCE: invention relates to the field of optical measurements of three-dimensional spatial coordinates of objects, particularly, to short-range photogrammetry and videogrammetry, and can be used in scientific research, in mechanical engineering and in other fields for measuring coordinates of points on the surface of objects. The method for measuring the spatial coordinates of points of an object consists in placing reference marks on the surface of the object, selecting a group of basic reference marks in the sections of expected minimum deformation and determining the initial three-dimensional coordinates thereof, finding the parameters of the working characteristic, fixing the image during loading, determining the two-dimensional coordinates of the images of all reference marks on the image, finding the required three-dimensional coordinates of all reference marks using the found parameters of the working characteristic. The reference marks therein are arranged in accordance with the predetermined initial geometric relations between the marks, the predicted values of the three-dimensional coordinates of the reference marks are consequently determined using the predetermined geometric relations and the initial three-dimensional coordinates of the base reference marks and/or the found three-dimensional coordinates of the reference marks following the base reference marks. Then the predicted values of the three-dimensional coordinates of each reference mark are determined, the three-dimensional coordinates are confirmed wherefor the predicted coordinates are varied within the specified geometric relations, the current values of the two-dimensional coordinates of the reference marks are calculated using the parameters of the working characteristic in reverse form for each coordinate variation, compared with the two-dimensional coordinates of the images of reference marks on the image and the variation of three-dimensional coordinates that meets the maximum of the matching criteria is taken as the resulting coordinates of the current reference mark.

EFFECT: reduced time and amount of computations during image processing.

1 cl, 6 dwg