Read e-book online Information Visualization, Second Edition: Perception for PDF

By Colin Ware

ISBN-10: 1558608192

ISBN-13: 9781558608191

Jam-packed with wealthy, deep idea approximately imaginative and prescient and visualization, with plenty of sensible suggestion. the single cause i do not provide it a 5 stars is that there are areas the place he's too cursory and absract to appreciate (but locations out of four hundred pages is lovely stable for an academic).

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Additional info for Information Visualization, Second Edition: Perception for Design (Interactive Technologies)

Sample text

When such illusions occur in diagrams, they are likely to be misleading. But what is important to the present argument is that some aspects of perception can be taken as bottom-line facts that we ignore at our peril. In general, perceptual phenomena that persist and are highly resistant to change are likely to be hard-wired into the brain. Sensory immediacy: The processing of certain kinds of sensory information is hard-wired and fast. We can represent information in certain ways that are neurally processed in parallel.

Bertin (1977) has suggested that there are two fundamental forms of data: data values and data structures. A similar idea is to divide data into entities and relationships (often called relations). Entities are the objects we wish to visualize; relations define the structures and patterns that relate entities to one another. Sometimes the relationships are provided explicitly; sometimes discovering relationships is the very purpose of visualization. We also can talk about the attributes of an entity or a relationship.

Perceiving metric intervals using color is not very effective. Many visualization techniques are capable of conveying only nominal or ordinal data qualities. Attribute Dimensions: 1D, 2D, 3D, . . An attribute of an entity can have multiple dimensions. We can have a single scalar quantity, such as the weight of a person. We can have a vector quantity, such as the direction in which that person is traveling. Tensors are higher-order quantities that describe both direction and shear forces, such as occur in materials that are being stressed.

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Information Visualization, Second Edition: Perception for Design (Interactive Technologies) by Colin Ware

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