DIGITISING IMAGES

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DIGITISING IMAGES
IAN WALKER SEARCH TECH MANAGER MEDIA EQUATION
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OVERVIEW Terminology Types of
Originals Equipment Used Resolutions Image
Formats Whats Next?
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DIGITISING IMAGES
TERMINOLOGY 72 dpi V 300 dpi Mega bytes V Mega
Pixels Optical Zoom V Digital Zoom
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72 dpi
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300 dpi
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72 dpi V 300 dpi 72 dpi 300 dpi 2 meg file 25
meg file Suitable for Screen display Suitable for
A4 printing Possibly compressed JPEG Most likely
uncompressed 150 k bytes TIFF Can be emailed Not
suitable for email
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DIGITISING IMAGES
TERMINOLOGY 72 dpi V 300 dpi Mega bytes V Mega
Pixels Optical Zoom V Digital Zoom
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MEGA PIXELS
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DIGITISING IMAGES
TERMINOLOGY 72 dpi V 300 dpi Mega bytes V Mega
Pixels Optical Zoom V Digital Zoom
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DIGITAL ZOOM
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TYPES OF ORIGINALS Photographic Prints Proof
Sheets Transparencies Printed Material Colour
negatives Objects Slides Maps Glass
Plates Engravings Original Artworks Newspapers

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EQUIPMENT Flatbed Scanner Copy Stand FbS with
Reflective Back Video Camera Transparency
Scanner Digital Camera SLR Drum Scanner
Digital Back Slide Scanner Digital Camera S
S with Autofeeder Film Scanner Wide Format
Scanner
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FLATBED
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FLEXTIGHT
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DRUM SCANNER
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SLIDE SCANNER
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SLIDE FEEDER
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FILM SCANNER
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LARGE FORMAT
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COPY STAND
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VIDEO CAMERA
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HIGH RES VIDEO
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DIGITAL SLR
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DIGITAL BACK
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DIGITAL CAMERA NON-SLR
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OVERVIEW Terminology Types of
Originals Equipment Used Resolutions Image
Formats Whats Next
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75 dpi
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150 dpi
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300 dpi
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600dpi
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1,200 dpi
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2,400 dpi
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4,800 dpi
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FILE SIZES
Size Pixels Megabytes
Screen 17 1024 x 768 2.36
Postcard 5 x 7 1500 x 2100 9.45
A4 8 x 11 2,400 x 3,300 23.76
A3 16 x 22 4,800 x 6,600 95.04
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FILE TYPES
TIFF RGB TIFF CMYK JPEG Loss Less JPEG Mod. Com.
Screen 2.4 3.2 600 k 120 k
Postcard 10 13 2.5 meg 1 meg
A4 25 32 5 meg 2 meg
A3 100 133 20 meg 8 meg
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• WHATS NEXT?
• Embedded Meta Data in the Image file
• Pict Bridge
• Adobe Photoshop CS2
• XML and Dublin Core