PC Graphics Quiz # 2

A process in 2-D computer graphics whereby a closed vector path is used to mask (block) parts of an image is known as:

Double path

Palletized path

Keying path

Clipping path

Which one of the color parameters measures how far away the color is from gray?

Hue

Saturation

Brightness

Gamut

In computer animation, the entire frame is redrawn for each frame. What of the following would reduce flicker between frames?

Surface removal

Phong shading

Double buffering

Interpolation

What does the term "jaggies" imply?

Image that continues from one page of a publication across the gutter or spine to the facing page.

The stair-step effect seen along curves and edges in text or bit-mapped graphics.

In halftone screens, a measurement of resolution or detail.

A photographic proof made from assembled (stripped) negatives.

Which of the following colors belong to the most common three-color additive color model used in video displays or otherwise used to describe the physical concepts involved?

Red

Magenta

Yellow

Green

Which of the following file formats are popular vector-graphics formats?

EPS

XLS

SVG

PDF

What is meant by the term auto trace?

A part of off-screen memory that holds the distance from the viewpoint for each pixel, the Z-value.

A programmed function in illustration software that converts raster graphics into vector graphics whereby paths are created along the edges of a scanned image.

A process of removing hidden surfaces by sorting polygons in back-to-front order prior to rendering.

Areas in an image with a blocky or blotchy appearance.

Images based upon geometric elements, such as points, curves, and surfaces, that follow mathematical equations are called:

Marques

Vectors

Knock-outs

Halftones

In a 3-D graphics environment, the process of subdividing a surface into a mesh of smaller shapes that are easy to analyze is known as:

Anti-aliasing

Tessellation

Blending

Texture mapping

Bitmapped graphics are also known as:

Vector graphics

Raster graphics

Line work

Ray tracing

The rendering of three-dimensional computer graphics often employs one or more approaches to model a complex four-dimensional mathematical function that defines the physical behavior of light at an opaque surface. This fundamental radiometric concept is known as the:

Kummer's function

Reisz function

Bidirectional reflectance distribution function (BRDF)

Mittag-Leffler function

Which of the following statements about pixels are true? (Answer all that apply.)

A pixel has a dimension.

A pixel is a point.

Pixels are visible.

A pixel can have coordinates.

What does the term "spline" imply?

In computer-aided design, a smooth curve that runs through a series of given points.

The smallest rectangular region of a picture or a frame buffer for which you can specify unique properties such as color and transparency.

Simulating a condition or activity by performing a set of equations on a set of data.

An interface that allows for the transfer of a digital video signal from a computer to a display, which increases the image quality and performance over a comparable analog system.

Which of the following is the most commonly used lighting model?

Xerxes

Z-buffering

Texture mapping

Phong

Which of the following is/are basic phases of creating 3-D computer graphics?

3-D modeling

3-D rendering

Transmogrification

Computer animation

What does the term "flythrough" imply?

A series of mathematical operations that act on output primitives and geometric attributes to convert them from modeling coordinates to device coordinates.

A memory buffer used to hold one line of video.

Displayed representation of a scene or an object that appears to have three axes of reference: height, width, and depth (x, y, and z).

A type of animation in which the camera moves around a scene, rather than objects moving in front of a stationary camera.

What does the term "depth sort" imply?

To convert an image or signal into digital code by scanning, tracing on a graphics tablet, or using an analog to digital conversion device.

An algorithm for creating a hidden-line drawing of polygon data sets by drawing the polygons from the most distant to the closest, in order.

The simulation of a continuous-tone image (shaded drawing, photograph) with dots.

In computer graphics, a particular shade or tint of a given color.

A modeling technique based upon a formal grammar whereby complex shapes are recursively generated from relatively simpleprocedures is termed as:

Flush right

Graftal

Crossover

Coated stock

Which of the following rotation techniques gives the best results?

Euler angles

Axis-angle

3 by 3 matrix

Quaternions

Which of the following are common shading models?

Cortez

flat

Gouraud

Phong

Of the following, select all of the techniques that could be employed in anti-aliasing:

Sinc-function filtering

Supersampling

Z-buffering

Flat shading

Which of the following types of reflection transmits light in all direction with the same energy?

Specular

Diffuse

Gloss

Retro reflection

Which one of the following formats would provide the least amount of pixelation when its dimensions are scaled (magnified) in size?

JPEG

TIFF

PNG

EPS

What is meant by the term projection?

The process of mapping three dimensional images to two dimensions for display.

An interpolation technique used to remove texture distortion, stair casing, or jagged edges at the edges of an object.

The part of the graphics engine that draws 3-D primitives, usually triangles or other simple polygons.

Wrapping a texture image onto an object to create a realistic representation of the object in 3D space.

An image rendering process that builds images based upon the propagation of light rays and the effects of absorption, reflection, and refraction associated with the objects being scanned is termed as:

Ray tracing

Grommets

Spread

Mask

The effect that occurs when an object nearer to the viewport in 3-D space blocks (masks) another, more distant object from view is called:

Depth

Cueing

Occlusion

Filtering

In computer graphics, when a line or object is moved where one end or point stays fixed in position is termed as:

Perfect banding

Rubber banding

Print banding

Saddle banding

Which of the following polygon meshes is most commonly used in mesh modelling because its input data are more readily acceptable to modern hardware?

Vertex-vertex mesh

Winged-edge mesh

Vertex-face mesh

Quad-edge mesh

Quiz:	PC Graphics Quiz # 2
Subject:	Basic Pc Graphics
Total Questions:	28 MCQs
Time:	28 Minutes