Specular reflections provide many important visual cues in our daily environment. They inform us of the shape of objects, of the material they are made of, of their relative positions, etc. Specular reflections on curved objects are usually approximated using environment maps. In this paper, we present a new algorithm for real-time computation of specular reflections on curved objects, based on...

Phase front modulation was previously used to refocus light after transmission through scattering media. This process has been adapted here to work in reflection. A liquid crystal spatial light modulator is used to conjugate the phase scattering properties of diffuse reflectors to produce a converging phase front just after reflection. The resultant focused spot had intensity enhancement values...

This paper describes a new approach for passive measurements of specular surfaces, in which the range and shape of specular surfaces are obtained from virtual images of pattern boards taken by the camera. In the approach, structured patterns displayed on two boards are acquired with a camera through the specular surface and each reflection point on the object is located geometrically using the ...

Highlight reflected from inhomogeneous objects is the combination of diffuse and specular reflection components. The presence of highlight causes many algorithms in computer vision to produce erroneous results. To resolve this problem, a method to separate diffuse and specular reflection components is required. This paper presents such a method, particularly for objects with uniformly colored s...

Specular microscopy has proven itself a useful tool for evaluation of donor corneas. In many eye banks, corneas are stored at 4 degree C and warmed to room temperature for specular microscopic evaluation. On occasion it would be desirable to put the cornea back into storage provided there were no detrimental effects of the recooling and subsequent rewarming. The effects of repeated cooling and ...

Specular reflections are present in the majority of laparoscopic videos. If not considered they will affect all further image analysis and registration algorithms. In most state-of-the-art algorithms, segmentation of specular reflections is done by intensity thresholding. However, the strong reflections are detected but the weak reflections are missed. The proposed method automatically detects ...

We derive maximum-likelihood estimators for the glint coefficient of specular radar targets and for the scattering coefficient of diffuse radar targets. The estimator for diffuse targets is a thresholded version of the squared magnitude of the received data. The estimator for specular targets is more complicated, involving the solution of a nonlinear equation involving ratios of modified Bessel...

The innovative method of combining specular and off-specular low-angle x-ray diffraction, along with the anomalous scattering effect, has been used to characterize magnetron-sputtered Co/Cu multilayers. The anomalous dispersion of Co is employed to increase the electron density contrast between the cobalt and copper layer. The use of a simulation program has been proven to be a straightforward ...