Contents Selection Intro- resolution Conversion Quality Control Metadata Technical Presentation Digital Preservation Management Continuing Education
Basic Terminology-digital images Basic Terminology-pixel dimensions Intro-pixel dimension

1. Basic Terminology

Key Concepts

digital images
pixel dimensions
bit depth
dynamic range
file size
file formats

additional reading



RESOLUTION is the ability to distinguish fine spatial detail. The spatial frequency at which a digital image is sampled (the sampling frequency) is often a good indicator of resolution. This is why dots-per-inch (dpi) or pixels-per-inch (ppi) are common and synonymous terms used to express resolution for digital images. Generally, but within limits, increasing the sampling frequency also helps to increase resolution.

Pixels: Individual pixels can be seen by zooming in an image.

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Basic Terminology - digital imagesBasic Terminology - pixel dimensions

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