BrightnessGrad

BrightnessGrad is a method for measuring and representing the perceived brightness of colors. It is often used in digital imaging and color science to ensure that the visual experience of brightness remains consistent across different displays or lighting conditions. The core idea behind BrightnessGrad is that human perception of brightness is not linear with the actual physical intensity of light. Instead, our eyes adapt to ambient light, and our perception is influenced by the surrounding colors and context.

This method typically involves a series of carefully calibrated grayscale or color patches that are presented to observers. The observers then rate the perceived brightness of these patches. The data collected from these subjective evaluations is used to create a model or a scale that maps objective color values to subjective brightness levels. This allows for more accurate adjustments and comparisons of color brightness, especially when dealing with images or designs that need to be viewed in various environments.

BrightnessGrad can be implemented in software or used as a guideline for designers and artists. It helps in avoiding situations where a color that appears bright on one screen looks dull on another, or where colors that are intended to be distinct in brightness are perceived as similar. By accounting for the non-linear nature of human vision, BrightnessGrad aims to improve the fidelity and consistency of visual experiences.