Color Constancy in Visual Scene Perception

نویسندگان

  • Christian Balkenius
  • Anders J Johansson
  • Anna Balkenius
چکیده

In RoboCup, all objects in the game are color coded to allow easy segmentation and identification. However, color vision is very sensitive to the exact color of the illumination which makes the identification task much harder than is often anticipated. Algorithms that work in the lab in fluorescent light may not function at all in an actual game where incandescent lights are used. This article is intended as a short tutorial on color vision and demonstrates a method for retrieving the color of image patches independently of the color of the illumination. The computational scheme is tested on a set of images of orange balls on a green background with varying illumination.

برای دانلود 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

Surface color perception under two illuminants: the second illuminant reduces color constancy.

This study investigates color perception in a scene with two different illuminants. The two illuminants, in opposite corners, simultaneously shine on a (simulated) scene with an opaque dividing wall, which controls how much of the scene is illuminated by each source. In the first experiment, the height of the dividing wall was varied. This changed the amount of each illuminant reaching objects ...

متن کامل

Color Construction * Backgrounds and Illuminants: the Yin and Yang of Color Constancy

Over a wide range of viewing conditions, our experience of an object’s color varies little. This “color constancy” is a striking achievement of human vision, and raises a much-debated question: What is the proper theoretical framework for understanding color constancy? Several approaches have been considered. The most common has been to estimate the spectral composition of the illuminant, and t...

متن کامل

Color constancy, lightness constancy, and the articulation hypothesis.

The light that reaches the eye has a history. Its spectral distribution at each point of the retina depends on the illumination present in the scene, the spectral properties of surfaces it encounters on its path to the eye, and other factors (Nassau 1983). The human visual system assigns colors to surfaces. If the assigned color of a surface patch is (approximately) determined by the spectral p...

متن کامل

Color Constancy in Two-Dimensional and Three-Dimensional Scenes: Effects of Viewing Methods and Surface Texture

There has been debate about how and why color constancy may be better in three-dimensional (3-D) scenes than in two-dimensional (2-D) scenes. Although some studies have shown better color constancy for 3-D conditions, the role of specific cues remains unclear. In this study, we compared color constancy for a 3-D miniature room (a real scene consisting of actual objects) and 2-D still images of ...

متن کامل

The Relation Between Color Discrimination and Color Constancy: When Is Optimal Adaptation Task Dependent?

Color vision supports two distinct visual functions: discrimination and constancy. Discrimination requires that the visual response to distinct objects within a scene be different. Constancy requires that the visual response to any object be the same across scenes. Across changes in scene, adaptation can improve discrimination by optimizing the use of the available response range. Similarly, ad...

متن کامل

Recalibrating color categories using world knowledge.

When the perceptual system uses color to facilitate object recognition, it must solve the color-constancy problem: The light an object reflects to an observer's eyes confounds properties of the source of the illumination with the surface reflectance of the object. Information from the visual scene (bottom-up information) is insufficient to solve this problem. We show that observers use world kn...

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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003