Computer Graphics Essentials

Refers to the sharpness and clarity of an image, measured in terms of ppi and dpi.

^{(Digital Imaging Basics by Melanie Cofield)}

• Resolution

• Pixel

• Quality

What is ppi?

• (pages per inch)

  Measurement used for images listed on screen

• (pixels per inch)

  Measurement used for images printed on printer

• (pixels per inch)

  Measurement used for images displayed on screen

What is dpi?

^{(image from http://www.pn-design.co.uk/design_blogs/images/dpi-as-mosaic.jpg)}

• (dots per inch)

  Measurement used in printing images.

• (dots per inch)

  Measurement used in displaying images on screen.

• (data per inch)

  Measurement used in calculating images size.

When resolution increases,

• images become less crisp and pixelated

• images become more sharp and crisper

The smallest portion of an image or display that a computer is capable of printing or displaying.

• pixel

• resolution

• color

The color model for display devices (monitors, digital projectors, etc.) Each displayed color is determined by a

combination of ...

• CMYK

• RGB

• LED

• LCD

The color model used for printing standard colors.

• CMYK

• RGB

• LED

• LCD

Images that have data that describe the color of each pixel. Larger display sizes equal larger file sizes in this type of image.

^{(Digital Imaging Basics by Melanie Cofield)}

• Vector Image

• Bitmap Image

The lines and blocks that create the image are defined by their start and end points, not by a number of pixels or dots, so they can be resized without any loss of quality.

^{(http://www.corbaecreative.com/2014/08/06/vector-graphic/)}

• Vector Image

• Bitmap Image

Which of the following is a vector image?

^{(Image from http://vektorrascheln.de/photos/inkscape_einsteiger_teil_i/vektor_raster_vergleich-pixelig-o.jpg)}

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