Specifications

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DEFINITIONS
Pixels
A measurement of the smallest “dot” that can be displayed on a computer screen.
Computer monitors display 72 pixels per inch, so 1” = 72 pixels.
Residual
A residual is an amount of difference between an expected and calculated value. For
example, if you expected a certain measurement to come to 2.55mm but the actual final
result was 2.52mm the residual (or residual error) would be 0.03mm.
Resolution
A measure of the smallest “feature” that can be resolved by an instrument. In
photography, the measure of resolution relates to the distinguishing of two black bars.
As the bars get closer and closer together in the digital image, they get increasingly
difficult to separate. Eventually they look like one bar and not two. The point at which
they just turn from looking like two bars to looking like one bar is called the resolution of
the imaging system.
Resolution
There are several types of resolution: bit resolutions (or bit depth), monitor resolution,
image resolution, and output resolution. In addition, there are two terms used to define
the various resolutions you’ll need to reproduce an image: pixels per inch (ppi) and
dots per inch (dpi).