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Enhancing Your Teaching with the Effective Use of Digital Images

Richard P. Usatine, MD

Nancy B. Clark, MEdFor STFM Annual Conference, September 2003,

Atlanta

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Outline

Teaching with Images File Formats and Resolutions Capturing Images Inserting Images Manipulating Images Publishing to the Web

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Interesting Patients & Clinical Cases

Dermatology Rheumatology Ophthalmology Infectious Disease Sports Medicine Musculoskeletal Problems Allergies Families

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Sample Images

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VesiclesVesicles

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Photographs tell a story

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Cutaneous Larva Migrans

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Nit

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Bumper Sticker

A PICTURE IS WORTH A THOUSAND WORDS, but it uses up a thousand times the memory.

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Definitions:

Clipart Photographs

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File Formats

Graphics File Formats: gif (clip art) jpg (photos) Bmp (bitmap) Tiff

Converting issues http://www.cs.sfu.ca/CourseCentral/365/li/material/notes/Chap3/Chap3.2/

Chap3.2.html

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Resolution

Resolution DPI: Web (72 dpi) vs Print (1440 dpi)

# Colors Gif 256 Jpg 16 million

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Sources of Graphics

Capturing Graphics from the Web Capturing Graphics from the Screen Digital Cameras Scanning

Pictures Text

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Web Graphics

Right-click on image Select COPY Paste image into application Or Select Save Image As… Insert image into application

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Find a Web Source

Google Images Search www.google.com Click on Images and do search Find image in correct size

ThumbnailsLarge image

Right Click – Copy (quick way) Right Click – Save Image As (long way)

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Create a New PowerPoint

Create Blank Presentation Insert Menu

Picture… Picture from file My Pictures Select picture

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PowerPoint Photo Albums

Insert menu, Picture, New Photo Album. Add a picture from a file or disk Add a picture from a scanner or camera

Album Layout Click Create. Use the Format Photo Album dialog box to

modify album. Large group of pictures: select all the pictures you

want, click Insert, click Create.

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Screen Captures

PrintScreen Button Whole screen

CTRL-ALT-PrintScreen Active window only

Paste Clipboard (CTRL-V)

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Digital Cameras

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Choosing a Digital Camera

Easy to use and/or many controllable features Point and shoot versus a lot of control?

Optical zoom of at least 3 to 1 Digital zoom is less useful and decreases the resolution

Strong macro capability Test it in the store

Size and price

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Megapixels

Megapixels are calculated by multiplying the horizontal and vertical pixel dimensions:

1600 x 1200= 1,920,000= 1.9 MP Only need a resolution of 1024 by 768 pixels

(not even 1 megapixel) to fill a high quality computer monitor or a PowerPoint slide

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2400 x 1800

= 4.3 mp

Resolution and megapixels

1600 x 1200

= 1.9 mp

640 x 480

= .3 mp

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Compression

Compression allows for smaller size files with less information but equal pixel numbers

TIFF – no compression, used for print publishing JPEG (Joint Photographics Experts Group)

Fine 1:4 compression Normal 1:8 compression Basic 1:16 compression

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Printing Photographs

Highest quality print will have the highest number of pixels and the lowest compression

A 1600 x 1200 when printed at 300 dpi makes a 5.3 x 4 inch print

At 150 dpi you can print an 8 x 10 photo dpi are like peanut butter – the more you

spread the dots, the thinner the peanut butter

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On-line resources for Digital Photography

http://www.imaging-resource.com/ http://www.nd.edu/~learning/pages/

digiphoto.html (Notre Dame University) http://www.shortcourses.com/using/

index.htm

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CLOSE UP

USE THE MACRO FOCUS FOR CLOSE-UPS OF SKIN

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Scanning

4. Draw dotted box

5. Save As

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Inserting a picture in Word and PowerPoint

Select the Insert Menu Select Picture or Image Select Clipart... or From File…

Where Saved? What Name?

Move it Resize it

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Manipulating Images

In PowerPoint In a graphics program

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The PowerPoint Picture Toolbar

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Resizing

Maintain Aspect Ratio (Shift-Corners) Reduce Pixels

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Cropping

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Rotate, flip, and mirror

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Adjusting

Color, Contrast, Brightness

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Manipulate Your Images

Using a graphics program

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Graphics Programs

Microsoft Photo Editor Adobe PhotoShop Adobe Photo Deluxe Paint Shop Pro Windows Paint Microsoft Image Composer

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Microsoft Photo Editor

Use this to resize the imageWeb/PowerPoint 1024 W X 768 H max

800 X 600 640 X 480

Print 8 X 10 2000 X 1500 (3 megapixels) 14M 3 X 5 1 megapixel

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Resizing Image

Image Menu Resize

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Save as

Save as type .gif for clipart .jpg for photo

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Compressing the Presentation

In PowerPoint Double click on

image Click COMPRESS Select all pictures in

presentation Select Web format Click OK

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Publishing to the Web

Preview first File menu, Web

Page Preview File menu, Save as

Web Page Save as Type

Web page Web Archive

Change Title

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