Lecture 9 - Depth Volume Sophie(1)

# Lecture 9 - Depth Volume Sophie(1) - Chapter 9 The...

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Chapter 9 The Three-Dimensional Field: Depth and Volume

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TV and film require us to project a 3-D world onto a 2-D surface. The camera and our eyes allow this projection to happen in a believable way. The key is what the camera sees, not what you see. The 3-D field covers the z-axis , graphic depth factors , and the depth characteristics of lenses .
The Z-axis The x-axis and the y-axis define the width and the height of a 2-D plane, like a television screen. The z axis describes depth.

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The Z-axis It is an imaginary line that extends from the front of the camera lens to the horizon. Used to help create the illusion of depth, that extends from the front of the camera lens to the horizon. Important because TV is two dimensional and can help add depth.
The Z-axis

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Graphic Depth Factors There are 5 factors that contribute to creating the illusion of depth on the 2-D plane: Overlapping planes Relative size Height in plane Linear perspective Aerial perspective
Graphic Depth Factors: Overlapping Planes Overlapping planes Use the foreground to force viewer to focus on object in background. You have one object in front overlapping another object in the background creating the illusion of depth.

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Graphic Depth Factors: Relative Size Relative size If you know how big an object is or if you can guess its size by other clues, you can estimate its distance from the camera by its relative size. If you have two objects that are similar in size, and one appears smaller than the other on screen, you will perceive the smaller object as farther away.

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Graphic Depth Factors
Graphic Depth Factors: Height in Plane Height in plane If the camera is shooting parallel to the ground, an object will appear more distant the higher it moves up in the picture field (until it reaches the horizon line). This depth cue is not the most reliable, because the mobility of the camera causes the horizon line to constantly shift.

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Linear perspective Linear perspective perceptions: All objects look progressively smaller the farther away they are. Parallel lines converge in the distance; vertical

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## This note was uploaded on 03/18/2012 for the course RTV 3001 taught by Professor Sharuti during the Spring '12 term at FSU.

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Lecture 9 - Depth Volume Sophie(1) - Chapter 9 The...

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