Space calibration method, electronic equipment and storage medium

Abstract

The invention is suitable for the technical field of hydromechanics, and provides a space calibration method and device, electronic equipment and a storage medium. The space calibration method comprises the steps of obtaining at least two set images, wherein the plane where the calibration plate is located when the calibration plate is shot in at least one set image coincides with the first to-be-calibrated cross section of the set space; determining a first mapping relationship corresponding to each set image in the at least two set images, wherein the first mapping relationship represents amapping relationship between a pixel coordinate system and a first world coordinate system, wherein the first world coordinate system is established based on the plane where the calibration plate is located when the calibration plate is shot in the corresponding set image; determining a calibration result based on a first mapping relationship corresponding to each set image in the at least two setimages, wherein the calibration result comprises at least two second mapping relationships, wherein the second mapping relationship represents a mapping relationship between the pixel coordinate system and a second world coordinate system, and wherein the second world coordinate system is established based on a plane where the corresponding to-be-calibrated section is located.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics, in particular to a space calibration method, electronic equipment and a storage medium. Background technique [0002] The basic process of tomographic particle image velocimetry (TPIV, Tomographic Particle Image Velocimetry) includes dropping tracer particles, illuminating the flow field space to be measured, taking particle images, calibration, tomographic three-dimensional particle reconstruction, volume cross-correlation analysis and calculation speed field. Among them, before the tomographic three-dimensional particle reconstruction, calibration is required to calibrate the coordinate mapping relationship between the pixel coordinate system and the world coordinate system of the particles, and the calibration accuracy determines the accuracy of the particle reconstruction. At present, the relevant technology is based on the segmented calibration method of the third-order polynomial f...

AI Technical Summary

Problems solved by technology

At present, the relevant technology is based on the segmented calibration method of the third-order polynomial fitting model to calibrate the mapping relationship between the pixel coordinate system and the spatial coordinate system of the flow field to be measured. However, this method is cumbersome to operate and requires multiple equidistant movements. Calibration plate, and requires high precision of the displacement mechanism

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