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Delta E (ΔE) is a widely used metric for quantifying the difference between two colors. It is calculated using a complex formula that takes into account the three dimensions of color: lightness, hue, and chroma.
The lower the Delta E value, the smaller the color difference. A Delta E of 1 or less is considered to be imperceptible by the human eye under normal viewing conditions. A Delta E of 2 or less is considered to be a small color difference that may be perceptible by the human eye under close observation. Delta E values above 2 are generally considered to be noticeable color differences.
Delta E<1 vs Delta E<2
- Delta E < 1: This is considered to be a very small color difference and is not perceptible by the human eye under normal viewing conditions.
- Delta E < 2: This is considered to be a small color difference that may be perceptible by the human eye under close observation.
In general, a Delta E of 1 or less is considered to be excellent color accuracy. A Delta E of 2 or less is considered to be good color accuracy.
For example, if a monitor has a Delta E of 1, then the colors displayed on the monitor will be virtually indistinguishable from the original colors. However, if a monitor has a Delta E of 2, then the colors displayed on the monitor may be slightly different from the original colors.
The importance of color accuracy depends on the application. For example, color accuracy is critical for professional photographers, graphic designers, and filmmakers. However, for general use, a Delta E of 2 or less is usually sufficient.
In summary, Delta E < 1 is a smaller color difference than Delta E < 2. Delta E < 1 is not perceptible by the human eye, while Delta E < 2 may be perceptible by the human eye under close observation.
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