A server includes: a memory storing calibration data; and a processor connected with the memory, the processor configured to: obtain a point cloud depicting a capture volume containing a transporter having a body and a holder carrying an object to be dimensioned; obtain a set of positions associated with the transporter; based on the set of positions and the calibration data, select a first portion of the point cloud excluding the body of the transporter and a mast of the holder; based on the calibration data, select a second portion of the point cloud from the first portion, excluding a base of the holder; and dimensioning the object based on the second portion of the point cloud.