Color and Resolution Introduction to Digital Imaging.

Color and ResolutionIntroduction to Digital Imaging

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



> 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.



> Print

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.


CMYK Pattern (magnified)


Digital Images

> Bitmap Images (Rastor Images)

> Vector Images


Bitmap Images


Vector Images


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.


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.


Resolution and Scale

Color and Resolution Introduction to Digital Imaging.

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