Efficient registration for precision inspection of free-form surfaces

Depth Buffer Based Registration of Free-Form Surfaces

Many algorithms have to deal with multiple representations of the same object. The process of aligning these representations is called registration. In this paper we present a new approach for the registration of free-form surfaces which is not based on finding closest points. Instead, our algorithm takes advantage of the graphics hardware and uses the depth buffer for determining the distance ...

3D-2D Projective Registration of Free-Form Curves and Surfaces

projection) which maps a 3D object onto a 2D image of this object, the relative positions of the 3D object and the Some medical interventions require knowing the correspondence between an MRI/CT image and the actual position of 2D sensor being unknown. the patient. Examples occur in neurosurgery and radiotherapy, This problem can be solved with artificial markers visible but also in video surge...

Free-form Textured Surfaces Registration by a Frequency Domain Technique

Free-form 3-D surfaces registration is a fundamental problem in 3-D imaging, tipically approached by extensions or variations of the ICP algorithm. This work presents a new frequency domain technique for 3-D view registration, totally diierent form an other recently proposed t e chnique for 3-D motion estimation also, based on the Fourier transform. Conceively, the proposed method c an give a n...

Free-Form Surface Matching for Surface Inspection

Matching free-form surfaces

In this work, the matching problem between two free-form parametric surfaces, S 0 (u, v) and S 1 (u, v), has been considered in the context of a "rst stage of the metamorphosis process, which is de"ned as gradual and continuous transformation of one key shape into another. A method is presented to approximate the two reparametrization functions, r(u, v) and t(u, v), via a discrete sampled set o...