Determination of view vectors from image warping mapping functions

Efficient displacement Mapping by Image Warping

Abstract. While displacement maps can provide a rich set of visual detail on otherwise simple surfaces they have always been very expensive to render. Rendering has only been done using ray tracing or by introducing a great number of micro-polygons. We present a new image-based approach by showing that rendering displacement maps is sufficiently similar to image warping and introduce a new warp...

Constrained Texture Mapping using Image Warping

We introduce in this paper a new method for smooth foldover-free warping of images. It allows users to specify the constraints in two different ways: positional constraints to constrain the position of points in the image and gradient constraints to constrain the orientation and scaling of some parts of the image. We then show how our method is used for texture mapping with hard constraints. We...

Cancelable Iris Biometrics Using Block Re-mapping and Image Warping

Image Warping

This note introduces the concept of image warping and treats the special case of Euclidean warping along with a discussion of a Matlab implementation. Secondly an application of image warping is given; namely image mosaicing where images are stitched together – e.g. to form a panoramic view. Effort has been put into making the text as self-containing as possible. However, basic knowledge of lin...

Image Warping by Radial Basis Functions: Application to Facial Expressions

The human face is an elastic object. A natural paradigm for representing facial expressions is to form a complete 3D model of facial muscles and tissues. However, determining the actual parameter values for synthesizing and animating facial expressions is tedious; evaluating these parameters for facial expression analysis out of grey-level images is ahead of the state of the art in computer vis...