Digital Images Copyright 2006 SouthWesternThomson Learning Image Resolution

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Digital Images Copyright 2006 South-Western/Thomson Learning

Digital Images Copyright 2006 South-Western/Thomson Learning

Image Resolution n Measured in pixels per inch (PPI) for onscreen images Measured in

Image Resolution n Measured in pixels per inch (PPI) for onscreen images Measured in dots per inch (DPI) for print images More dots mean higher resolution Click the mouse or tap the RIGHT ARROW key to continue. Screen 2

Resolution and File Size n n High-resolution images have large file sizes compared to

Resolution and File Size n n High-resolution images have large file sizes compared to low-resolution images High-resolution images are good for printed items Low-resolution images are usually okay for displaying on screen Low-resolution images load quickly Click the mouse or tap the RIGHT ARROW key to continue. Screen 3

File Formats BMP JPEG GIF TIFF Used by Microsoft Windows and Office programs Supports

File Formats BMP JPEG GIF TIFF Used by Microsoft Windows and Office programs Supports millions of colors and can be compressed Small and compressed images; popular for Internet High-resolution format commonly used for print documents Click the mouse or tap the RIGHT ARROW key to continue. Screen 4

Scanners n n Capture images in formats such as TIFF, JPEG, or GIF The

Scanners n n Capture images in formats such as TIFF, JPEG, or GIF The capture process is called digitizing Flatbed Scanner Click the mouse or tap the RIGHT ARROW key to continue. Screen 5

Digital Cameras n n Capture images electronically without film Resolution is measured in megapixels

Digital Cameras n n Capture images electronically without film Resolution is measured in megapixels LCD screen shows image immediately Image quality settings can be adjusted Click the mouse or tap the RIGHT ARROW key to continue. Screen 6

Moving Images to a PC n n n Attach camera to PC with cable

Moving Images to a PC n n n Attach camera to PC with cable Transfer images to PC Save images on a memory card Attach card reader to PC and move images Use the Scanner and Camera Wizard to copy images to PC Click the mouse or tap the RIGHT ARROW key to continue. Screen 7

Review 1. Which file format is commonly used for high-quality printed documents? a. BMP

Review 1. Which file format is commonly used for high-quality printed documents? a. BMP b. GIF c. TIFF Read the question and decide which answer you think is correct. Click the mouse to see the correct answer. Click the mouse or tap the RIGHT ARROW key to continue. Screen 8

Review 1. Which file format is commonly used for high-quality printed documents? TIFF Click

Review 1. Which file format is commonly used for high-quality printed documents? TIFF Click the mouse or tap the RIGHT ARROW key to continue. Screen 9

Review 2. DPI (dots per inch) is used to express resolution for a. On-screen

Review 2. DPI (dots per inch) is used to express resolution for a. On-screen images b. Printed images c. Images created with a digital camera and displayed in a slide show Read the question and decide which answer you think is correct. Click the mouse to see the correct answer. Click the mouse or tap the RIGHT ARROW key to continue. Screen 10

Review 2. DPI (dots per inch) is used to express resolution for Printed images

Review 2. DPI (dots per inch) is used to express resolution for Printed images Click the mouse or tap the RIGHT ARROW key to continue. Screen 11

Review 3. High-resolution images a. Have large file sizes b. Load quickly to the

Review 3. High-resolution images a. Have large file sizes b. Load quickly to the computer screen c. Do not look good when printed Read the question and decide which answer you think is correct. Click the mouse to see the correct answer. Click the mouse or tap the RIGHT ARROW key to continue. Screen 12

Review 3. High-resolution images Have large file sizes Click the mouse or tap the

Review 3. High-resolution images Have large file sizes Click the mouse or tap the RIGHT ARROW key to continue. Screen 13

Review 4. A digital camera a. Captures images on film b. Captures images electronically

Review 4. A digital camera a. Captures images on film b. Captures images electronically c. Usually creates images in TIFF format Read the question and decide which answer you think is correct. Click the mouse to see the correct answer. Click the mouse or tap the RIGHT ARROW key to continue. Screen 14

Review 4. A digital camera Captures images electronically Click the mouse or tap the

Review 4. A digital camera Captures images electronically Click the mouse or tap the RIGHT ARROW key to continue. Screen 15

Review 5. When using a scanner a. You can save captured images in only

Review 5. When using a scanner a. You can save captured images in only one format b. Images can be saved in grayscale but not in color c. Images can be cropped to the desired size Read the question and decide which answer you think is correct. Click the mouse to see the correct answer. Click the mouse or tap the RIGHT ARROW key to continue. Screen 16

Review 5. When using a scanner Images can be cropped to the desired size

Review 5. When using a scanner Images can be cropped to the desired size Click the mouse or tap the RIGHT ARROW key to continue. Screen 17