Mesh stitching and fusion is a fundamental operation in a lot of 3D shape editing and modeling applications. For example

it always need to assemble different mechanical apparatuses together in the area of computer-aided industrial design

creating new toys from some existing ones in the area of digital entertainment and reassembling fractured archeological artifacts in the area of cultural relic protection

etc. In general

to blend two under-stitching meshes or fuse several interested sub-parts together

it is widely recognized that the transition surface connecting them should possess the following properties. The transition surface should smoothly combine the underlying meshes in a seamless natural manner for different joining boundaries

whilst the local geometric details should also be preserved as soon as possible in the vicinity of the stitching boundaries. Based on the Hermite interpolation scheme

a new approach of mesh seamless stitching and fusion is presented in this paper

which can be adapted for blending two meshes with the arbitrary distributed boundary point sets. First

their boundary point sets of two under-joining meshes are automatically selected to form the blending region. The two joining boundary curves can thus be interpolated by two quadratic B-spline curves separately. Then

the transition surface can be constructed by Hermite functional blending scheme under the geometric position and the tangential direction limitations of two boundary curves. Finally

the transition region can be created by triangulating its discretely sampled vertices and applying Laplacian smoothing to form the resultant blending mesh. Compared with the traditional mesh fusion methods

owing to interpolating the two boundary curves of two under-fusion meshes by using B-spine curves

our mesh stitching and fusion scheme can be applied to blend the underlying meshes with different types of boundary curves

that is

it is not only adaptable for the meshes with planar boundary curves but also for the meshes with spatial boundary curves. Meanwhile

due to constructing the transition region by Hermite interpolation scheme that can satisfy the position and the tangential continuity constraints of the stitching boundary curves

the generated transition surface can smoothly blend the underlying meshes and reconstruct the local geometric details in the vicinity of the joining boundaries. Moreover

different from representing the blending surface by an implicit function

our explicit Hermite interpolation scheme is both simple and efficient. The experimental results illustrate the effectiveness and the robustness of our poroposed mesh blending approach in many applications

such as the mesh stitching and mesh repair operation for artifact scanned models

the dental crown restoration in the practical dentistry CAD application

and the extended mesh fusion application for combining several parts of different scanned models into a single object. Here

as an extension of mesh stitching and mesh repair

the mesh fusion operation can also be efficiently conducted by Hermite interpolation between every two boundaries of several shapes

which can provide the users in the digital entertainment area or the engineers in the industrial design area a convenient modeling tool to easily create various desired interesting complex 3D shapes.