Monocular Cues Flashcards

1
Q

Geometric Perspective

A

An object’s shape changes as it is viewed from different angles and distances.
Types:
Linear perspective
Apparent Foreshortening
Vertical Position in Field

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2
Q

Linear Perspective

A

Parallel lines converge at distance towards the horizon.

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3
Q

Apparent Foreshortening

A

Objects and terrain features become more narrow or oval as distance increases and altitude decreases.

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4
Q

Vertical Position in the Field

A

Objects farther away appear higher towards the horizon.

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5
Q

Retinal Image Size

A

Used in distance estimation. Images on the retina are perceived as a certain size.
Factors that help:
Known size of objects.
Increasing and decreasing size of objects.
Terrestrial Association.
Overlapping contours or interposition of objects.

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6
Q

Known Size of Objects

A

The brain learns to accurately estimate the distance of objects of known size by their retinal image size.

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7
Q

Increasing and Decreasing Object size

A

If the retinal image of an object is growing it is getting closer, and the opposite if it is shrinking.

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8
Q

Terrestrial Association

A

Comparison of one object with another of known size aids in size and distance determination.

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9
Q

Overlapping Contours and Interposition of Objects

A

When objects overlap, the obstructed object is further away. The unobstructed is closer.

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10
Q

Aerial Perspective

A

An object’s color and clarity and its shadow are perceived to estimate distance.

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11
Q

Fading of Colors and Shades

A

An Object viewed through haze, fog, or smoke appears to be farther than it actually is.

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12
Q

Loss of Detail or Texture

A

The further an object is away, the less detail is visible.

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13
Q

Position of light and shadow

A

If an object’s shadow is closer to the observer, then the object is closer to the observer than the light source.

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14
Q

Motion Parallax

A

The closer a stationary object is to a moving observer, the faster it will appear to move as the observer moves.

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