Long catheter splicing measurement method based on two-dimensional target

• Main Authors: ZHAO JIBIN, XIA RENBO, ZENG YUANSONG, ZHANG TIANYU, WU WEI, CHEN YUELING
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2023
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention discloses a long catheter splicing measurement method based on a two-dimensional target, which comprises the following steps of: firstly, selecting a measurement section position on a catheter, installing the two-dimensional target, acquiring an image of the catheter at each measurement section position by a plurality of cameras, and reconstructing a three-dimensional model of the measurement section; then, center coordinates of coded and sorted target dots are obtained through image processing, common target dots in adjacent measurement sections are matched, and a coordinate system transformation matrix between the adjacent measurement sections is calculated; and finally, converting the catheter three-dimensional models of all the measurement sections into the same coordinate system to obtain a complete three-dimensional model of the long catheter. The method can adapt to the three-dimensional attitude measurement of a conduit with a large length specification, is not limited by the type of a t