lightness perception

Lightness perception is how our brain interprets the brightness of surfaces, allowing us to distinguish objects regardless of the lighting conditions. It involves the visual system comparing the light reflected from a surface to its surroundings, rather than just measuring raw brightness. For example, a white piece of paper looks white both in bright sunlight and dim indoors because our brain adjusts for overall lighting, maintaining consistent perception. This process helps us recognize objects under varying lighting, ensuring consistent perception of colors and shades in our environment.