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  • Grey balance

    What factors influence the grey balance and color in an image

  • #2
    Take home test?

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    • #3
      If you take a photo of a red apple, the image will be red. If you take a photo of a grey apple, throw it away because it's spoiled. If you take a photo of both a red and grey apple at night, the image will be black and it will be impossible to tell one apple from the next.

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      • #4
        Gray balance is the first important step undertaken by the color separator, in determining the color content and contrast that the final printed piece will have. Gray balancing is a scanner calibration procedure, in which the operator programs specific dot percent ratios of YELLOW, MAGENTA and CYAN into the scanner output. When film is output to these percentages and is proofed or printed, it should reproduce a "neutral gray" color.
        A midtone three color gray can be comprised of 50% yellow; 50% Magenta and 60% Cyan. This will render a neutral gray tone. All other midtone process color values will be dependent upon this setting. If the "gray balance" settings are altered; then the color balance will also be altered. Because of the limitations of the pigments in the process inks, when equal amounts of cyan, magenta, and yellow are printed on white paper, they do not reflect equal amounts of red, green and blue to produce gray (See Figure 1). Each of the process inks absorbs or reflects an unequal amount of its share of the red, green, and blue of the spectrum. As such, if equal amounts of cyan, magenta, and yellow are printed, they would make a brownish color rather than a neutral gray.

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