Page 231 - DCAP504_Computer Graphics

Computer Graphics

14.5 Self Assessment

1. State whether the following statements are true or false:
(a) Phi Phenomenon is based on the principle that the human eye is able to perceive movements
based on pieces of information.
(b) Visual effect is a process by which images are created and manipulated in the absence of a
live action shoot.

(c) Rotoscoping is a method patented by Max Fleischer in 1937.
2. Fill in the blanks:
(a) The ………………………… phenomenon creates an illusion of motion both towards and
away from the viewer.
(b) In the ……………..…, the movements are made on the camera.

(c) The …………………………… is a process by which images are created and manipulated in
the absence of a live action shoot.
(d) Animation employs the phenomenon of ………………….
3. Select a suitable choice for every question:
(a) Today, animations are also referred as ………………………….

(i) Cartoons
(ii) Drawings
(iii) Pixels
(iv) Morphs
(b) 2-D and 3-D are the techniques of which of the following.

(i) Animation
(ii) Warping
(iii) Texturing
(iv) Morphing
14.6 Review Questions

1. Discuss the phenomenon of ‘persistence of vision’ with respect to animation.
2. Discuss briefly about the techniques of animation.
3. Elaborate on the various animation techniques.
4. Discuss the three scenarios required for additional visual effects.
5. Distinguish and discuss rotoscoping and stereoscopy.
Answers: Self Assessment

1. (a) True (b) True (c) False
2. (a) Beta movement (b) Motion tracking technique (c) Visual effect
(d) Persistence of Vision
3. (a) Cartoons (b) Animation

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