Post on 13-Jan-2016
Color and ResolutionIntroduction to Digital Imaging
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Introduction to Digital Imaging • Colby Caldwell
The Display of Color
Red, Green, Blue (RGB)primary (additive) light colors
Cyan, Yellow, Magenta, Black (CMYK)secondary (subtractive) reflected colors
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Introduction to Digital Imaging • Colby Caldwell
The Display of Color
> Monitor
On a monitor, color is represented with emitted light, as varying intensities of the three primary (additive) light colors: red, green, and blue in (RGB) color.
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Introduction to Digital Imaging • Colby Caldwell
The Display of Color
In print, color is represented as light reflecting off ink, in the secondary (subtractive) colors of cyan, magenta, and yellow (CMYK) the result of combining pairs of primary colors.
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Introduction to Digital Imaging • Colby Caldwell
CMYK Pattern (magnified)
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Introduction to Digital Imaging • Colby Caldwell
Digital Images
> Bitmap Images (Rastor Images)
> Vector Images
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Introduction to Digital Imaging • Colby Caldwell
Bitmap Images
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Introduction to Digital Imaging • Colby Caldwell
Vector Images
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Introduction to Digital Imaging • Colby Caldwell
Vector Images
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Introduction to Digital Imaging • Colby Caldwell
Resolution
> Image Resolution
Number of pixels (in both height and width) making up an image. The higher the resolution of an image, the greater its clarity and definition.
> Output Resolution
The number of dots per inch (dpi) used to display an image on a display device (monitor) or in print.
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Introduction to Digital Imaging • Colby Caldwell
Resolution: Units of Measure
> Pixel
The picture elements that make up an image, similar to grains in a photograph or dots in a half-tone. Each pixel can represent a number of different shades or colors, depending upon how much storage space is allocated for it.
> DPI
Dots per inch. A measurement of the scanning resolution of an image or the quality of an output device. Expresses the number of dots a printer can print per inch, or monitor can display, both horizontally and vertically. A 600-dpi printer can print 360,000 (600 x 600) dots on one square inch of paper.
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Introduction to Digital Imaging • Colby Caldwell
Resolution and Scale