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# Intro ch 08_b

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• Teaching tip Describe bitmapped image as drawing on graph paper. Fill in the blocks to create the image. I use a graph paper circle to illustrate.
• Teaching tip Remind your students of the algebra classes they took in high school. The functions they plotted on the Cartesian plane are similar to vector equations.
• Teaching tip Table 8B.1 on page 325 lists several image types.
• Discussion point Discuss when JPGs are appropriate. A picture of my daughter will lose some detail in her shirt. This is OK. However, a JPG of my most recent CAT scan may lose detail of a tumor. This is not OK.
• Teaching tip Free or inexpensive clip art is often of too poor quality to use in graphic production. They are best suited for interoffice or personal communication.
• Teaching tip Figure 8B.7 on page 327 demonstrates two images created with a paint program.
• Teaching tip This image is an example of the solution to the project found in the Instructor’s Manual.
• Teaching tip Have fun with this one. Remind the students of the Jurassic Park movies. Sarcastically say that the dinosaurs were not real. But they sure looked good.
• ### Transcript

• 2. Chapter 8B Graphics and Multimedia
• 3. Graphic File Formats
• Bitmapped images
• Most common image type
• Also called raster images
• Image is drawn using a pixel grid
• Each grid contains a color
• Color depth
• Number of usable colors
• Used to store drawings or photographs
• Resizing image can reduce quality
• 4. Bitmap Resized This image was drawn as a straight line.
• 5. Graphic File Formats
• Vector images
• Drawn using mathematical formulas
• Formulas describe the line properties
• Resizing image will not reduce quality
• 6. Graphic File Formats
• File formats and compatibility
• Method for storing an image
• Each method has pros and cons
• Some formats are proprietary
• Graphic software can handle all formats
• 7. Graphic File Formats
• Common bitmapped file formats
• BMP
• EMF
• GIF
• JPG
• PICT
• PNG
• TIFF
• 8. Graphic File Formats
• Vector file formats
• Most vector formats are proprietary
• Two universal formats exist
• DXF
• IGES
• 9. Acquiring Images
• Scanners
• Like a photocopier
• Image is saved onto disk
• Scanners import a variety of formats
• 10. Acquiring Images
• Digital cameras
• Stores digitized images
• Uses long term storage
• Image is usually a JPG file
• 11. Acquiring Images
• Digital video cameras
• Stores full motion video
• Uses long term storage
• Movie can be transferred to DVD
• 12. Acquiring Images
• Clip art
• Originally a book with images
• Now a CD with images
• Most office suites include a selection
• Additional clip art is online
• 13. Graphics Software
• Paint programs
• Create bitmap images
• Includes sophisticated tools
• Artists draw with several brushes
• Objects drawn become permanent
• Windows Paint
• 14. Graphics Software
• Draw programs
• Create vector based images
• Used when accuracy is critical
• Objects have an outline and fill
• Both have line style and color
• Can fill using pictures
• 15. Graphics Software
• Photo-editing software
• Modify and manipulate digital images
• Work at the pixel level
• Images can be enhanced
• Picture flaws can be repaired
• Pictures can be completely changed
• Photoshop and GIMP
• 16. Enhancing a Photo
• 17. Graphics Software
• Generates vector files
• Engineering and design fields
• Drawings accurate to the millimeter
• 18. Graphics Software
• 3D modeling software
• Generates three dimensional images
• Image can be shaped on screen
• Image is animated frame by frame
• 19. Graphics Software
• Computer generated imaging
• Generates photo realistic images
• Used for movies and television
• Software eliminates tedious parts
• 20. Multimedia Basics
• Medium
• Way of sharing information
• Voice, pictures, text
• More effective with multiple mediums
• Multimedia presents information with one medium
• 21. Multimedia Basics
• Interactivity
• Users and program respond
• Users can control the content
• Main difference between TV and computer
• 22. Chapter 8B End of Chapter