METHOD FOR SCALING IMAGES IN PHOTOPLANIMETRIC SHOOTING OF HORIZONTAL MINE WORKINGS Russian patent published in 2023 - IPC G01C11/02 

FIELD: mining industry.

SUBSTANCE: invention relates to the mining industry and is intended for the production of surveying work in horizontal mine workings. The method for scaling images of photoplanimetric shooting of horizontal mine workings includes the formation of light contours on the walls of the workings, their fixation with a digital camera and subsequent processing and analysis of photographs. In this case, the light contours are formed using a laser plane builder, which creates constantly visible linear light traces from three mutually perpendicular laser planes on the working contour. At the intersection of the lines of light traces, reference points are formed, between which scaling bases are automatically formed, the lengths of which are measured with a laser rangefinder. Then the coordinates of the reference points are determined, and then digital images are scaled by ensuring that the coordinates of the reference points determined by the results of measurements in the working and the coordinates of the corresponding reference points in the coordinate system of the image coincide. During fixation, the digital camera is placed vertically at such a distance from the laser plane builder that in the plane of the camera screen, the area bounded by the light trace line of the transverse vertical plane of the laser plane builder occupies 70-80% of the image.

EFFECT: increase in the accuracy of measurements, safety and efficiency of shooting without long-term “debt” of workings.

1 cl, 1 dwg