Core Concepts
Foreground objects can achieve constant luminance perception through context-sensitive formulas.
Abstract
The article presents a framework for developing context-sensitive luminance correction formulas to achieve constant luminance perception for foreground objects. The formulas involve making the foreground object slightly translucent to blend with the background, allowing for the creation of desired luminance illusions. The structure of the translucency formulas is identified as a power function, with a focus on the relative size of the foreground object. An interactive program in Shadertoy was implemented to determine the coefficients of the polynomials used in the formulas. The article also discusses the evolutionary basis of luminance perception and the simplicity of the perceptual process in primitive visual systems. The method aims to provide a simple yet meaningful explanation for luminance perception, allowing users to adjust the polynomial part of the formula to achieve their desired luminance perception.
Introduction and Motivation
Illusion of color perception and luminosity
Intrinsic image analysis and its relevance
Evolutionary basis of luminance perception
Basis and Rationale
Qualitative estimation of diffuse reflection terms
Monotonically increasing functions for luminance perception
Simplified calculation of average illumination
Contributions
Formulation of monotonically increasing forward function
Weighted average function structure
Method to determine polynomial coefficients
Related Work
Visual illusions and luminosity perception
Intrinsic image analysis and relative luminance
Cultural differences in visual perception
Theoretical Framework
Formulation of luminance perception equations
Use of power functions and polynomials
Bézier form for polynomial representation
Implementation and Results
Development of web-based interactive program
Testing and identification of polynomial coefficients
Comparison of constant color perception with variable color bands
Discussion
Forward system approach in vision systems
Simplification through computer graphics methods
Considerations for working with photographs
Conclusion, Limitations, and Future Work
Development of luminance correction formulas
Application to other perception problems
Extension to handle colors and unusual color models
Stats
"Our second contribution is the structure of the weighted average function, which works like translucency."
"Our third contribution is the development of a method to determine the polynomial f(s), part of the equation of y."
"Our fourth contribution is to enable others to determine the coefficients of the polynomial function by testing their perception of luminance."
Quotes
"Every perception of color is an illusion. [...] We do not see the colors as they really are. In our perception, they alter [each other." - Josef Albers
"Our vision system has evolved into equations 1 and 2. In other words, we believe that all animals can have a similar structure in their visual system since this appears to be the simplest structure that can emerge through an evolutionary process." - Authors
"The forward computer graphics approach also simplifies certain problems." - Authors