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    CE-certification or CE Marking is a conformity marking consisting of the letters CE. The CE Marking applies to products regulated by certain European health, sa...

  • Human Eyes to Distinguish Colors

    The color difference unit, NBS, is derived from the unit of color difference formula which is established by Judd-Hunter. In 1939, the American Bureau of Standa...

  • The Color of Objects

    There are three major elements to perceive color: light, object and observer. Any change of these three elements will influence the observers color perception. ...

  • CIE Standard Observers

    In the visual observing situation, the observer is the human eye that receives the light reflected from or transmitted through an object, and the brain which pe...

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