We present a method to accomplish photorealistic rendering of real-world objects from their sparsely sampled appearance variation. Using a 3D model and a small set of images of an object, we recover all the necessary photometric information for subsequent rendering from arbitrary viewpoints and under novel lighting conditions. We first extract the diffuse reflection component from the input ima...

In this paper, we propose a new method for estimating reflection properties of a real object surface from a single specular component image, as well as the light source position. Polarization is used for separating the diffuse and specular reflection components. Different from previous approaches, which heavily assumed both distant viewpoint and illuminant position, our method can work even und...

The seismic reflection characterizations of a thin layer are important for reservoir geophysics. However, discussions on the reflection for a thin layer are usually restricted to precritical angle incidence. In this work, an exact analytical solution is derived to model the reflection amplitude and amplitude variation with offset (AVO) responses of a single thin bed for arbitrary incident angle...

Image based rendering has displayed advantage in speed over traditional geometry based rendering algorithms. With the four dimensional light field descriptions, static scene can be generated with interactive rate on ordinary computer. The limitation of the scheme is that it can only handle static scene and fixed illumination. This paper raises the idea to decompose the light field into sub-ligh...

The problem of terminating a transmission line that consists of a set of coupled loop resonators to support the propagation of magneto-inductive waves is considered. Since the ideal terminating impedance is not easily realisable end-reflections are generally obtained from such a line. Techniques are developed to calculate the reflection coefficient from a line terminated with a finite number of...

Study objectives: To determine the possible association of Chlamydia pneumoniae infection with diffuse panbronchiolitis (DPB) and with COPD. Design: Prospective case-control study. Setting: Division of Respiratory Diseases, Kawasaki Medical School Hospital. Participants: Fifteen DPB and 77 COPD patients who had acute exacerbations of respiratory conditions and 35 and 120 control subjects, respe...

First identified in 2012, the histone 3 mutation H3.3K27M significantly affects the prognosis of children with anaplastic astrocytoma (AA) and other gliomas. Tumors with this mutation tend to be more aggressive and localize along the midline, behaving like diffuse intrinsic pontine gliomas (DIPGs). Surgical options are often limited because of the deep location of these tumors coupled with thei...

Iterative least-squares estimation requires acciirate reflectance models to retrieve geometrical pammeters of curved surface elements from an image projection. W e investigate the use of .separating the diffuse (body) reflection from the specular (surface) reflection being re8ponsible for image highlights. Experzments show that the (smooth) daffuse component yields the best convergence properti...

We describe an energy-partition diagnostic based on integrating sphere principle for measuring absorption and scattering in plasma-mediated ablation by a high repetition-rate (133 MHz), pulsetrain-burst ultrafast-pulse laser. The system time-resolves the partition of elastically scattered laser light into specular reflection, diffuse reflection, and transmission, giving access to per-pulse abso...

A very important factor in the assessment of solar energy resources is the availability of direct irradiance data of high quality. Nevertheless, this quantity is seldom measured and thus must be estimated from measures of global solar irradiance, a quantity that is registered in most radiometric stations. In this work we analyze the results provided by different models in the estimation of hour...