Chapter 7 Learning Objectives

SECTION A

After reading Section A, you should be able to:

• define the term “bitmap graphic”
• explain how a printed image can be converted into a bitmap
• describe how a digital camera stores images
• list four technologies that can be employed to transfer images from your camera to your computer
• discuss how a bitmap’s resolution relates to your monitor’s resolution setting
• explain how the process of cropping affects a bitmap graphic
• explain what is meant by the term “pixel interpolation”
• define the term “color depth”
• describe the differences in the following palettes: grayscale, system, and Web
• define the term “dithering”
• discuss the affects of resolution, image size, color depth, and palettes on file size
• describe the strengths and weaknesses of each of the following graphics file formats: BMP, PCX, TIFF, JPEG, GIF, and PNG

SECTION B

After reading Section B, you should be able to:

• contrast a vector graphic with a bitmap graphic
• discuss the advantages and disadvantages of vector graphics
• describe the tools that can be used to create vector graphics
• define the term “metafiles”
• explain the purpose of rasterization
• discuss three advantages of using vector graphics in Web pages
• define the term “rendering”
• explain the purpose of ray tracing
• briefly describe the process required to animate 3-D graphics
• compare and contrast 3-D animation in movies with 3-D animation in computer games

SECTION C

After reading Section C, you should be able to:

• explain how computers store video data
• describe four factors that can affect video playback quality
• list four desktop video file formats
• outline the basic steps required to create a desktop video
• discuss the advantages and disadvantages of using each of the following types of cameras to shoot the footage for a desktop video: digital video, analog video, and videoconferencing
• describe the equipment that’s needed to transfer video footage from a camera to a computer
• explain the purpose of video capture software
• explain the differences between linear editing and nonlinear editing
• describe three methods that can be used to reduce the size of video files
• define the term “codec”
• describe two ways of transferring a digital video file from the Web to your PC
• explain the difference between an external video and an internal video on a Web page

SECTION D

After reading Section D, you should be able to:

• define the term “waveform audio”
• explain the affect of sampling rate on sound quality
• describe how a computer changes an audio file into music
• list three audio file formats
• provide some reasons for the popularity of MP3 files
• describe the process used to create an MP3 file from an audio CD
• explain what is meant by the term “synthesized sound”
• define the term “MIDI”
• discuss the advantages and disadvantages of MIDI
• differentiate between speech synthesis and speech recognition software