These four photographs show how a person with fair and freckled skin might appear using different tones and spectrums. On the top left is the visible light RGB image. That RGB file was then converted to a grayscale version (top right). It is interesting to note how the elimination of color data can change emphasis. On the bottom left is an ultraviolet recording, and on the bottom right the subject was photographed using infrared radiation.
Making things more visible is a constant challenge when working in the laboratory. There are a number of methods ...
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