Aims

• To offer an independent recource of digital imaging theory.

• To develop an understanding of the theory behind digital image structure.

• To develop knowledge and understanding about the technical processes and procedures involved with producing a digital print.

Objectives

• Display an understanding of digital imaging theory including:

  • image mode

  • file format and size

  • resolution

Introduction

The term 'digital photography' is used to describe images that have been captured by digital cameras or existing photographs that have been scanned to create digital image data. The term also describes the processing of digital image data on computers and the output of 'hard copies' or digital prints (on paper or plastic) from this data.

Digital photography is now revolutionising not only the process of photography but also the way we view photography as a visual communications medium. This new photographic medium affords the individual greater scope for creative expression, image enhancement and manipulation.

Digital foundations

This guide is intended only to lay the foundations of practical digital knowledge. The individual may find it beneficial to supplement this information with additional guides specific to the equipment and computer programs being used. The information supplied by these additional guides, although valuable, may quickly become redundant as new equipment and computer programs are released frequently in this period of digital evolution.

The continuous tone of a subject (no steps in brightness)

Ten pixels each with a different tone or level used to describe the above