On Visual Abstraction Ivan Viola Visual Abstraction Fundamental - - PowerPoint PPT Presentation

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Nov 09, 2022 266 likes •388 views

On Visual Abstraction Ivan Viola Visual Abstraction Fundamental concept in visualization and visual arts Somewhat intuitively understood A formal definition not available VAD textbook refers to task and data abstraction Map generalization:

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On Visual Abstraction

Ivan Viola

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Visual Abstraction

Fundamental concept in visualization and visual arts Somewhat intuitively understood A formal definition not available VAD textbook refers to task and data abstraction Map generalization: abstraction in cartography from detailed into small-scale map (selection, simplification, combination, smoothing, enhancement, displacement, exaggeration, aggregation)

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[Ruas 2008]

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Abstraction

Abstract; Latin abstrahere = drawn away

Abstract math, abstract algebra, … Abstract art Abstract data Abstract class

Abstraction

a conceptual process where general rules and concepts are derived from the usage and classification of specific examples, literal (real or concrete) signifiers, first principles, or other methods. An abstraction is the outcome of this process. Also termed as a concept.

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Uses of Abstraction

Modeling – better comprehend a phenomenon, understanding its essence rather than memorizing its instantiation Ontologies – classify objects or phenomena based on their abstract relation Analogies – transfer properties associated with an object or phenomenon once we discover some abstract conceptual equivalence Metaphors – augment an abstraction with a concrete, tangible example accessible to the audience than its natural occurence

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What is (and what is not) Visual Abstraction

Abstract art is art with visual elements: color, shape, points, lines Line drawing of a figure is a visual abstraction of that figure Is visual mapping equivalent to visual abstraction? Abstraction of visual data Abstraction by visual means What is a minimal transformation that would qualify as visual abstraction? (Just-Noticeable-Abstraction?) Is rotation a visual abstraction? Is cropping a visual abstraction? Is projection onto image plane a visual abstraction?

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Definition

Visual abstraction is a concept-preserving transformation used in visual arts and data visualization, which transforms (digital) information into visual representations by removing details attributed to natural variation, noise, etc.

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Mondrian: Trees to Abstraction

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Geometric abstraction axis operates in

bject space: topological methods,

iso-surface extraction, projection, statistical shape models Photometric abstraction axis relates to rendering and how realistic is the illu- mination model: global illumination, local illumination, contour and line drawing generators Temporal abstraction describes the abstractions of dynamic phenomena: event extraction, trajectory simplification

Axes of Visual Abstraction

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Gradually Abstracting Spatial Characteristics

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[Kolesar et al. 2017]

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Visual Abstraction of Flow Simulations

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[Weinkauf and Theisel 2004]

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Visual Abstraction in DNA Nanotechnology

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[Miao et al. 2018]

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Task for You

Visual abstraction is a foundational element of visualization and needs our attention to formally define it

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http://ieeexplore.ieee.org/document/8025425/