Joint estimation of Multiple Light Sources and Reflectance from Images

نویسندگان

  • Bruno Mercier
  • Daniel Méneveaux
چکیده

In this paper, we propose a new method for estimating jointly light sources and reflectance properties of an object seen through images. A classification process firstly identifies regions of the object having the same appearance. An identification method is then applied for jointly (i) deciding what light sources are actually significant and (ii) estimating diffuse and specular coefficients for the surface.

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

Estimation of Illuminant Direction and Intensity of Multiple Light Sources

This paper presents a novel scheme for locating multiple light sources and estimating their intensities from a pair of stereo images of a sphere. No prior knowledge of the location and radius of the sphere is necessary. The sphere surface is not assumed to be a pure Lambertian surface, instead, it has both Lambertian and specular properties. The light source locating algorithm is based on the f...

متن کامل

Simultaneous Estimation of Spectral Reflectance and Normal from a Small Number of Images

Spectral reflectance is inherent characteristics of an object surface and therefore useful not only for computer vision tasks such as material classification but also compute graphics applications such as relighting. In this study, by integrating multispectral imaging and photometric stereo, we propose a method for simultaneously estimating the spectral reflectance and normal per pixel from a s...

متن کامل

A Review of Selected Multiple Light Source Detection Methods

1 Hougen and Ahuja This 1993 paper [2] is the first method to approach the multiple light source problem. It uses a combination of stereo, light source estimation, and shape from shading methods for determining the shape of objects. This summary will focus on the proposed light source estimation technique and it’s integration in the system. Four main assumptions are stated: 1. The light sources...

متن کامل

Possibility Using Remote Sensing for Estimation Sediment Resources to Reservoir of Exploitation Dams

Sedimentation in reservoirs is a prerequisite for sustainable water management. The Dez dam is very important the country because of its role in electricity frequency adjustment. The main objective of this research is to identify the sources of sediment in the catchment using satellite images, GIS and hydro-geological information. For this purpose, the lab results of sediments mineralogy reveal...

متن کامل

Spectral Estimation of Printed Colors Using a Scanner, Conventional Color Filters and applying backpropagation Neural Network

Reconstruction the spectral data of color samples using conventional color devices such as a digital camera or scanner is always of interest. Nowadays, multispectral imaging has introduced a feasible method to estimate the spectral reflectance of the images utilizing more than three-channel imaging. The goal of this study is to spectrally characterize a color scanner using a set of conventional...

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   شماره 

صفحات  -

تاریخ انتشار 2004