Light, Reflection, Illumination

نویسنده

  • Byron Breedlove
چکیده

saw the light” figure often in our everyday speech, we do not typically contemplate light. We may marvel at its seemingly mysterious expression through auroras, rainbows, lasers, or celestial objects or find comfort in its subtler forms such as sunbeams, candles, campfires, or fireflies. Artists and scientists, by contrast, do study and manipulate light, reflection, and illumination. Impressionistic painters strive to capture an impression of a fleeting moment, a particular scene. Many among their numbers are considered masters for their skill at capturing light as it shimmers across surfaces. Claude Monet once described Joaquín Sorolla y Bastida Sorolla as “the painter of light above all other.” Sorolla, was born in Valencia, Spain, in 1863. He and his infant sister Concha were orphaned when their parents died during a cholera epidemic 2 years later, and they were raised by their mother’s relatives. Early on, Sorolla seemed destined to become an artist: “When Joaquin was of an age to go to school, he manifested little inclination for his studies

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Image Denoising Using Anisotropic Diffusion Equations on Reflection and illumination Components of Image

This paper proposes a new hybrid method based on Homomorphic filtering and anisotropicdiffusion equations for image denoising. In this method, the Homomorphic filtering extracts the reflectionand illumination components of a noisy image. Then a suitable image denoising method based onanisotropic diffusion is applied to each components with its special user-defined parameters .This hybridscheme ...

متن کامل

SIGGRAPH 2010 Course: Global Illumination Across Industries Point-Based Global Illumination for Movie Production

This course note describes a fast point-based method for computing diffuse and glossy global illumination, area light illumination and soft shadows, HDRI environment map illumination, multiple diffuse reflection bounces, final gathering for photon mapping, ambient occlusion, reflection occlusion, and volume scattering. The results are free of noise and the run-time does not increase due to disp...

متن کامل

Illumination Normalization for Outdoor Face Recognition by Using Ayofa-filters

Abstract In this paper, we propose an illumination normalization approach, which apparently improves the face recognition accuracy in outdoor environments. The proposed approach computes the frequency variability and reflection direction on local face regions where the direction of the light source is unknown. It effectively recovers the illumination on a face surface. Majority of conventional ...

متن کامل

Determining Reflectance and Light Position from a Single Image Without Distant Illumination Assumption

Several techniques have been developed for recovering reflectance properties of real surfaces under unknown illumination conditions. However, in most cases, those techniques assume that the light sources are located at inifinity, which cannot be applied to, for example, photometric modeling of indoor environments. In this paper, we propose two methods to estimate the surface reflectance propert...

متن کامل

A Signal-Processing Framework for Reflection—Part 1: Reflection as Convolution

We present a signal-processing framework for analyzing the reflected light field from a homogeneous convex curved surface under distant illumination. This analysis is of theoretical interest in both graphics and vision and is also of practical importance in many computer graphics problems—for instance, in determining lighting distributions and bidirectional reflectance distribution functions (B...

متن کامل

Point-Based Approximate Color Bleeding

This technical memo describes a fast point-based method for computing diffuse global illumination (color bleeding). The computation is 4–10 times faster than ray tracing, uses less memory, has no noise, and its run-time does not increase due to displacementmapped surfaces, complex shaders, or many complex light sources. These properties make the method suitable for movie production. The input t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره 21  شماره 

صفحات  -

تاریخ انتشار 2015