Problems with Color Evaluation and Perception
All of the beer samples above are of the
same exact color!
A contrast effect is the enhancement or diminishment, relative to normal, of perception, cognition and related performance as a result of immediately previous or simultaneous exposure to a stimulus of lesser or greater value in the same dimension.
Have you ever entered a movie theater on a sunny afternoon? The room probably appeared completely dark but as your visual system adjusted to the reduced level of light you were able to see better after a few moments. This "adaptation mechanism" allows our eyes to recover from an oversensitivity to a particular stimuli. "Chromatic adaptation" occurs when our eyes adjust to certain color stimuli. Follow the instructions below and see how the visual system responds to a color overload.
Instructions: Fixate upon the black spot in between the uniform cyan and yellow areas for about 30 seconds. Then scroll down and shift your gaze to the black spot in the 2nd image. Note that the image of the seaplane appears approximately uniform after this adaptation.
This is an example of "successive contrast". This occurs when the perception of currently viewed test field is modulated by previously viewed test field.
One more example -
at the two colored circles on the top row for a few seconds and then shift your
attention to the two circles in the bottom row.
"Simultaneous contrast" refers to the manner in which the colors of two different objects affect each other.
Colors often appear brighter and more vibrant when they are bordered by frames. Black lines are commonly used to enhance colors in applications like stained glass. This tactic creates a certain effect, as shown below, and prevents color clashing. Notice that the drawing on the left colors appear significantly brighter and pure.
When a tree fall is the forest and no one is around does it still make a sound? Well yes it does as the physical property of the breaking creates the acoustics and noise as sound. However if the is a beautiful red sunset and no one is around to view it is it still red? Well the answer is yes and no! The electromagnetic properties of the light will be present but color is a perception and uses the viewer to produce the color.
In the image here, the two inner squares are exactly the same shade, but they appear to have different shades due to the background provided by the outer squares.
Both gray areas are of the same shade and intensity. Place a vertical pencil at the center of the picture on the left. Do the sides of the gray circle appear the same?