Transcript MS PowerPoint 97/2000 format

Finding and Using
Digital Images
Bradford
12th December 2005
Alastair Dunning, AHDS Executive Office
King’s College London, http://ahds.ac.uk/
Outline of Practical Session
1. Preparing and manipulating digital
images
2. Locating and using existing
images
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Using trusted sources
Importance of metadata
Added online facilities
Preparing an image for web (1)
1. Download tiff (taged image file format)
image from http://ahds.ac.uk/halliwell.tif
2. Open image in Adobe PhotoShop
3. Check properties of image (click on Image
/ Image Size)
4. Check pixel size
5. Check document size
6. Check image resolution
Preparing an image for web (2)
1. Alter resolution for web – maximum
screen resolution is currently 72dpi
2. What pixel size do you require? Depends
on context, e.g. thumbnails, illustration,
analysis
3. Often useful to keep to a standard for
width or height.
4. In this case alter height to 350 pixels –
width will automatically adjust
5. We can also crop images to focus on
certain parts
Preparing an image for web (3)
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What format? Two compressed formats:
jpeg / jpg (Joint Photographic Experts
Group) or gif (Graphics Interchange
Format)
JPEG – for complex images, e.g. photos
GIF – for line art, logos, more simple
images
Preparing an image for web (4)
1. Go to File / Save for Web
2. Choose settings to optimise file size and
quality of image
3. Click the box labelled Progressive
4. Save (with different file name! – always
hold on to master version)
Locating Images (1)
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http://www.google.co.uk/images
Can you trust the images?
What is their quality?
What are their right issues?
• Using images depending on the
type of usage you are considering
– public, private, educational,
commerical
Locating Images (2)
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http://ahds.ac.uk/visualarts/
Images from a trusted source
Value-added metadata (catalogue info)
Mostly cleared for rights use
Collections include
– Imperial war museum collection,
contemporary design, 50s fashion, medieval
sculpture, 19th-century music covers, Bretton
Hall artwork
– Over 60,000 images in total
• All jpegs ready for web use
Locating Images (3)
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Try basic search on word ‘Yorkshire’
Some useful hits; some not so useful
Go to advanced search
Try ‘war’ in description and
‘watercolour’ in material
• More precise range of hits
• (Be careful – results might open in
new window)
Locating Images (4)
• Scan through short metadata; or
look for longer catalogue information
• Choose medium or larger image
• Use right hand button on mouse to
save picture to your PC
• Lightbox facilties for saving and
sending multiple images
• Image now ready for use in website,
powerpoint etc.