Computer Graphics NPTEL Assignment 4 Answers

Course Name: Computer Graphics NPTEL

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These are the solution of Computer Graphics NPTEL Assignment 4 Answers

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Q1) One of the primary purposes of assigning colors to the objects in a scene is to perceive depth, which helps in creating impression of 3D.
a. True
b. False

Answer: a. True

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Q2) Lighting model computes color in terms of ________ values.
a. Power
b. Complexity
c. Intensity
d. Voxel

Answer: b. Complexity

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These are the solution of Computer Graphics NPTEL Assignment 4 Answers

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Q3) In lighting model, to avoid indistinguishable overlapping of surfaces with different distances we use
a. Intensity Attenuation
b. Color Attenuation
c. Intensity Reflection
d. Color Reflection

Answer: a. Intensity Attenuation

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Q4) Color of a surface point depends on the properties of the light source as well as the surface containing the point.
a. True
b. False

Answer: a. True

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Q5) In graphics, how many light source types are generally considered?

Answer: 3

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These are the solution of Computer Graphics NPTEL Assignment 4 Answers

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Q6) Lighting and shading represent two different ways of computing colors at a point.
a. True
b. False

Answer: a. True

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Q7) Flat shading is more realistic coloring than gouraud shading (at the expense of increased computation).
a. True
b. False

Answer: b. False

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Q8) In graphics there are typically three types of light sources : Point light source, Directional source and _______ source.
a. Ambient
b. Simple
c. Albedo

Answer: a. Ambient

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These are the solution of Computer Graphics NPTEL Assignment 4 Answers

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Q9) models work at the pixel-level, after the scene is mapped to the screen.
a. Lighting
b. Shading

Answer: b. Shading

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Q10) We cannot perceive absolute difference in intensity value
a. True
b. False

Answer: a. True

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These are the solution of Computer Graphics NPTEL Assignment 4 Answers

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