Specular reflections and interreflections produce strong highlights in brightness images. These highlights can cause vision algorithms, such as, segmentation, shape from shading, binocular stereo, and motion detection to produce erroneous results. We present an algorithm for separating the specular and d i f i s e components of reflection from images. The method iises color and polarization, si...

The paper presents an analysis of the operational properties paint coatings foruse in military technology field masking. assessment propertieswas performed on basis measurements surface geometric structureand adhesion using peel method. specular gloss, colourin range 400-700 nm and reflectance 350-1200 weremade relation to requirements Polish Defence Standard NO-80-A200.Coating systems are char...

In this work we propose a method that facilitates transport of a material appearance between objects depicted in two different images. The approach consists of two steps performed on both the material and original images, capturing the object material, and the object of interest itself. The diffuse and specular reflection components are separated by removing specular highlights from the materia...

The MetallicArt technique is used as a visual security feature to hide patterns in CMY images using an additional silver ink. The patterns are hidden under nonspecular viewing conditions and visible under specular viewing conditions. By varying the amount of silver ink, the authors control the intensity of the specular reflection of the printed pattern. Using a spectral reflection prediction mo...

Shading is known to produce vivid perceptions of depth. However, the influence of specular highlights on perceived shape is unclear: some studies have shown that highlights improve quantitative shape perception while others have shown no effect. Here we ask how specular highlights combine with Lambertian shading cues to determine perceived surface curvature, and to what degree this is based upo...

In this paper we present a simple, robust and efficient algorithm for estimating reflectance fields (i.e., a description of teh transport of light through a scene) for a fixed viewpoint using images of the scene under known natural illumination. Our algorithm treats the scene as a black-box linear system that transforms an input signal (the incident light) into an output signal (the reflected l...

We report the biomimetic artificial silicon (Si) compound eye structures for broadband and wide-angle antireflection by integrating nanostructures (NSs) into periodically patterned microstructures (p-MSs) via thermal dewetting of gold and subsequent dry etching. The truncated cone microstructures with a two-dimensional hexagonal symmetry pattern were fabricated by photolithography and dry etchi...

This paper combines and extends two optical models based on a two-collimated-flux approach that we previously proposed for the reflectance and transmittance of nonscattering elements, i.e., stacked nonscattering plastic films on the one hand, and films printed in halftone on the other hand. Those two models are revisited and combined by introducing different reflectances and transmittances on t...

The bi-directional reflectance distribution function (BRDF) describes the angular distribution of reflectance for any angle of light incident on a surface. It is a crucial parameter for modeling the light field near the benthic surface, and is important for understanding the remote sensing signal from shallow waters. We have been making measurements of this parameter for varied benthic surfaces...

This paper proposes a goniophotometric system for measuring light reflection on an object surface using two commercial robot arms and a digital camera. It allows four degrees of freedom in incident and viewing angles necessary for full parametrization of a reflection model. Collected images are transformed as if they were all captured from the same viewing direction. A database of measured surf...