Volumetric effects such as beams of light through participating media are an important component in the appearance of the natural world. Many such effects can be faithfully modeled by a single scattering medium. In the presence of shadows, rendering these effects can be prohibitively expensive: current algorithms are based on ray marching, i.e., integrating the illumination scattered towards th...

We introduce adaptive volumetric shadow maps (AVSM), a real-time shadow algorithm that supports high-quality shadowing from dynamic volumetric media such as hair and smoke. The key contribution of AVSM is the introduction of a streaming simplification algorithm that generates an accurate volumetric light attenuation function using a small fixed memory footprint. This compression strategy leads ...

Shadow physical phenomena observed in natural scenes. Image segmentation, tracking, recognition algorithms to fail or can cause a shadow. In this paper, conducted a research in the field of research on the perception of image complexity and classification of images, remove the shade. The purpose of this paper is two-fold: in the first place, an attempt is to be presented for consideration to ov...

Shadows are illuminated as a result of Rayleigh scattering phenomenon, which happens to be more effective for small wavelengths of light. We propose utilization of false color images for shadow detection, since the transformation eliminates high frequency blue component and introduces low frequency near-infrared channel. Effectiveness of the approach is tested by using several shadow-variant te...

In this study, a new (r, n)-threshold secret image sharing scheme with low information overhead for images is provided, which has a low distortion rate, and is more applicable for light images. A secret image is encoded into n noise-like shadow images to satisfy the condition that any r of the n shares can be used to reveal the secret image, and no information on the secret can be revealed from...

Many soft shadow algorithms approximate the visibility integral via sampling occlusion at many locations on the light source. We present a fast micro-rasterization kernel to efficiently handle a grid of such sample locations by micro-rasterizing triangular occluders onto planar lights. Our bit-parallel scanline algorithm iterates over relevant scanlines and clears occluded samples using a small...

The lighting of the city landscape has ignited night-time economy as a new blue ocean. Macau takes festivals an opportunity to create night scene, and light shadow festivals, part popular cultural industry, are better able expand life, enhance city's charm name card. This paper analyzes main categories Macao Light Shadow Festival, defines connotation denotative value discusses influence Festiva...