Projector calibration method and device for multi-directional projection

The invention is applicable to the technical field of optical measurement and provides a projector calibration method for multi-directional projection, which comprises: step S1, using a projector to sequentially project calibration patterns preset at N assigned positions preset around a target to a target plane, and collecting a target information map by using a camera at each assigned position; step S2, processing the target information map collected at each assigned position, calculating an accurate phase value of a target feature point, and further obtaining sub-pixel coordinates in a projector image coordinate system corresponding to the target feature point; step S3, calibrating the projector by using the sub-pixel coordinates in the projector image coordinate system and a three-dimensional world coordinate X of the known target feature point to obtain initial calibration parameters; and step S4, using a bundle adjustment method to optimize the initial calibration parameters and the three-dimensional world coordinate X to obtain final calibration parameters. The calibration method provided by the invention makes the final calibration results more accurate.