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The paper addresses the following problem: Given an array of light intensities obtained from some scene, find the light sources in the original scene. The following factors are discussed from the point of view of their relevance to light sources detection: The highest intensity in the scene, absolute intensity value, local and global contrast, comparison with the average intensity, and lightness computation. They are shown to be insufficient for explaining humans' ability to identify light sources in their visual field. Finally, a method for accomplishing the source detection task in the mondrian world is presented.
Available again, an influential book that offers a framework for understanding visual perception and considers fundamental questions about the brain and its functions. David Marr's posthumously published Vision (1982) influenced a generation of brain and cognitive scientists, inspiring many to enter the field. In Vision, Marr describes a general framework for understanding visual perception and touches on broader questions about how the brain and its functions can be studied and understood. Researchers from a range of brain and cognitive sciences have long valued Marr's creativity, intellectual power, and ability to integrate insights and data from neuroscience, psychology, and computation. This MIT Press edition makes Marr's influential work available to a new generation of students and scientists. In Marr's framework, the process of vision constructs a set of representations, starting from a description of the input image and culminating with a description of three-dimensional objects in the surrounding environment. A central theme, and one that has had far-reaching influence in both neuroscience and cognitive science, is the notion of different levels of analysis—in Marr's framework, the computational level, the algorithmic level, and the hardware implementation level. Now, thirty years later, the main problems that occupied Marr remain fundamental open problems in the study of perception. Vision provides inspiration for the continuing efforts to integrate knowledge from cognition and computation to understand vision and the brain.
Decide Which Lighting Technology Is Best for Your ApplicationLight Sources, Second Edition: Basics of Lighting Technologies and Applications presents an overview of the three main technologies that have produced the numerous families of lighting products on the market today: electrical incandescence, electrical gas discharges, and semiconductor lig
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
How we see and how we visualize: why the scientific account differs from our experience.
Held every three years, The International Symposia on the Science and Technology of Light Sources (LS) provide a unique forum for the international community of engineers, scientists, research organizations, and academia from the lighting industry. In Light Sources 2004, leaders in their respective fields discuss the latest findings and exciting developments in light source research. Contributors provide valuable analyses and discussions on topics such as incandescent and halogen sources, fluorescent discharge sources, lamp-related electronic gear, high intensity discharge sources, diagnostics, solid state sources, modeling, dielectric barrier sources, excimer devices, and nonlighting applications.
This book is a result of a Cognitive Science program conducted to identify some of the leading issues and approaches that dominate in cognitive science research. The discussion is organized under four groups: psychological theories, mental representation, cognitive development, and semantic theory.