Yarn evenness three-dimensional measurement method and system based on multi-camera system

The invention discloses a yarn evenness three-dimensional measurement method and system based on a multi-camera system, and belongs to the technical field of image data processing, and the method comprises the steps: obtaining yarn images of yarn evenness shot by a plurality of cameras; determining the projection spacing of the yarn evenness in the yarn image according to the yarn image; determining size parameters of the yarn evenness according to a camera shooting angle and a projection interval; and calculating the cross section area of the yarn evenness according to the size parameters of the yarn evenness. According to the method, yarn images, shot by a plurality of cameras, of yarn evenness are sampled, the projection spacing of the yarn evenness in the yarn images is determined according to the yarn images, and then the size parameters and the cross section area of the yarn evenness are detected according to the shooting angles of the cameras and the projection spacing. The multiple cameras can be arra