Test Questions for Chapter 11



Test Questions for Chapter 9

True/False

1. T F Unlike bit-mapped painting programs, vector graphic drawing programs do not support layer image elements.

2. T F PostScript font like other outline fonts produce smooth looking curves on the screen but are not scalable fonts.

3. T F An animated GIF image is actually a sequence of GIF images that are downloaded to the user’s Web page as a stream.

4. T F Polygon-surface and wireframe modeling construct the 3-D object as a collection of connected polygons or closed curved figures that form facets on the surface of the object.

5. T F Painting programs lack the features and are not sophisticated enough to be used to produce commercial digital artwork.

6. T F SketchPad introduced in 1964 was the first graphic drawing application used for the computer-assisted design of automobiles.

7. T F Parametric curve segments employed in drawing and illustration programs are scalable as well as easily modified.

8. T F Polygon-surface modeling is a form of volume-based 3-D graphics used to create three-dimensional images with a computer.

9. T F Illustration programs are often used to create typographic special effects such as drop shadowing and wraparounds for both Web pages and desktop publishing.

10. T F A voxel is a three-dimensional pixel used in defining some forms of three-dimensional images.

Matching

1. _____ bit-mapped graphics a. this application is best used for creating

simple graphics and figures that might be

incorporated in documents, for example.

2. _____ vector graphics b. a page description language that has scalable

fonts for high quality print output.

3. _____ painting program c. Painter, CorelDraw, and Illustrator are

examples of this.

4. _____ drawing program d. the air defense system that first exploited

graphic output and interface on a CRT.

5. _____ illustration program e. this vector graphics application is employed

by professionals for creating graphic products

for print.

6. _____ 3-D modeling program f. treats the graphic image as a collection of

pixels.

7. _____ PostScript g. treats the graphic image as a collection of

graphic objects including lines, curves, and

figures that are represented and stored

abstractly.

8. _____ SAGE h. this bit-mapped graphics application is used

by artists and amateurs alike to produce

artwork graphic images.

9. _____ volume-based j this graphic application program permits the

user to experiment with alternative views or

projections of the objects drawn in the image.

10. _____ surface-based k. 3-D graphics often used for scientific

applications such as medical imaging.

m. General Motors developed this graphic

application for designing automobiles.

n. 3-D graphics method employed in most

consumer software.

o. permits comments to be added to graphic image files.

Multiple Choice

1. Bit-mapped graphic images

a. are composed of individual pixels that represent spatial samples of the image or scene.

b. are composed of geometric descriptions of image elements that include points, lines, curves, and figures.

c. are composed of numeric values that represent the visual qualities of the scene depicted.

d. all of the above.

2. Vector graphic images

a. are composed of individual pixels that represent spatial samples of the image or scene.

b. are composed of geometric descriptions of image elements that include points, lines, curves, and figures.

c. are composed of numeric values that represent the visual qualities of the scene depicted.

d. all of the above.

3. The chief advantage of bit-mapped graphics is

a. scalability of images.

b. ease of editing shapes and figures in the image.

c. complete control over the pixels that comprise the image.

d. all of the above.

4. The chief advantage of vector graphics is

a. scalability of images.

b. ease of editing shapes and figures in the image.

c. more compact files compared to pixel images.

d. all of the above.

5. Creating a surface-based 3-D image requires

a. defining the models for objects in the image.

b. placing objects in the image, that is, describing the scene.

c. rendering surfaces with color, texture, and lighting effects.

d. all of the above.

6. Animation programs automate the creation of animated graphics by

a. calculating in-between frames based on key frames supplied by the illustrator.

b. composing objects and motion from numeric descriptions provided by the user.

c. digitizing and rendering full-motion video from analog cameras.

d. none of the above.

7. EPS

a. is a metafile format employed for storing PostScript and other graphic images.

b. was developed by Microsoft for producing scalable graphics.

c. stands for “Enlarged PostScript.”

d. all of the above.

8. The relative size of the image when displayed on the screen is called

a. image resolution.

b. image size.

c. image scale.

d. all of the above.

9. In painting programs, examples of graphic transformations include

a. scaling and rotating.

b. perspective and free-form distortions.

c. shading and stretching.

d. all of the above.

10. Volume-based 3-D graphics software

a. are often employed for creating commercial art and animation.

b. is widely available as consumer applications.

c. plot the image as 3-D pixels.

d. none of the above.

Fill in the Blanks

1. DAC-1, developed by General Motors in 1964 was the first ___________________ program that demonstrated the ability of computer graphics to be employed for industrial uses.

2. ___________________ is the process of producing surface effects such as texture, lighting and shading effects in order to achieve photorealism in graphic images.

3. ___________________ graphics , also called ___________________ graphics, treats the image as a collection of pixels each with specific features such as color or intensity.

4. ___________________ graphics , also called ___________________ graphics, treats the image as a composition of objects such as lines and curves. Each of these is defined and may be manipulated independently.

5. Bezier and B-splines are types of ___________________ , which are plotted mathematically for scaling, display, and easy modification.

6. ___________________ 3-D graphics plot a three-dimensional image comprised of three-dimensional pixels called ___________________.

7. ___________________ 3-D graphics treats objects as a composition of planes or facets that are bonded together to create three-dimensional properties.

(correct choices plus distractors)

bit-mapped computer-assisted design computer-assisted manufacturing

drawing image scale image size

modeling object-oriented painting

parametric curves pixels raster

rendering scene description surface-based

vector volume-based voxels

Short Essay Questions

1. How important are computer graphics? Explain. Hint: Cite examples of how graphics affect other applications.

2. What are the advantages and disadvantages of creating graphics using bit-mapped painting programs?

3. Both drawing and illustration programs employ vector graphics to create, store, and manipulate images. How do they differ?

4. Describe the steps or stages of creating a 3-D drawing using a typical surface-based 3-D graphics modeling and rendering program.

5. Explain how animated graphics are possible. Specifically, how is it possible to create drawings or pictures that appear move or change with time? Moreover, how do animation programs assist in creating them?

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