Projection Techniques in Computer Graphics

The video tutorial introduces the concept of projection in computer graphics, explaining how n-dimensional objects are represented in n-1 dimensions. It covers two main types of projections: parallel and perspective. Parallel projection involves projecting objects along parallel lines, with the center of projection at an infinite distance. Perspective projection, on the other hand, has the center of projection at a finite distance, creating a visual effect similar to human vision. The tutorial also discusses subtypes of these projections, such as orthographic and oblique for parallel, and one-point, two-point, and three-point for perspective.

What is the primary purpose of a projection in computer graphics?

• To enhance the color of an object

• To convert a 3D object into a 2D representation

• To increase the size of an object

• To change the texture of an object

Which of the following is NOT a type of projection discussed?

• Orthographic

• Perspective

• Parallel

• Axonometric

In parallel projection, how are the coordinate positions transformed?

• Along curved lines

• Along parallel lines

• Randomly

• In a circular pattern

What is the characteristic of the center of projection in parallel projections?

• It is at a finite distance

• It is at an infinite distance

• It is at the object's center

• It is at the origin

How does perspective projection mimic the human visual system?

• Objects become clearer as they move away

• Objects change color as they move away

• Objects appear smaller as they move away

• Objects appear larger as they move away

In perspective projection, where is the center of projection located?

• At the object's center

• At a finite distance

• At an infinite distance

• At the viewer's eye

What is a key difference between parallel and perspective projections?

• The distance of the center of projection

• The speed of transformation

• The texture of the object

• The color of the object

Why is it difficult to determine the exact size and shape of objects in perspective projection?

• Because objects become blurry

• Because objects change color

• Because objects appear smaller

• Because objects appear larger

Which type of projection is more similar to how humans perceive the world?

• Perspective projection

• Oblique projection

• Parallel projection

• Orthographic projection

What happens to the size of an object as the distance from the center of projection increases in perspective projection?

• The size remains the same

• The size fluctuates

• The size increases

• The size decreases