DIGITISING IMAGES

IAN WALKER

SEARCH TECH MANAGER

MEDIA EQUATION

OVERVIEW

Terminology

Types of Originals

Equipment Used

Resolutions & Image Formats

What’s Next?

DIGITISING IMAGES

TERMINOLOGY

72 dpi V 300 dpi

Mega bytes V Mega Pixels

Optical Zoom V Digital Zoom

DIGITISING IMAGES

DIGITISING IMAGES

72 dpi

DIGITISING IMAGES

300 dpi

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 JPEGMost likely uncompressed 150 k bytes TIFF

Can be emailed Not suitable for email

DIGITISING IMAGES

TERMINOLOGY

72 dpi V 300 dpi

Mega bytes V Mega Pixels

Optical Zoom V Digital Zoom

DIGITISING IMAGES

MEGA PIXELS

DIGITISING IMAGES

TERMINOLOGY

72 dpi V 300 dpi

Mega bytes V Mega Pixels

Optical Zoom V Digital Zoom

DIGITISING IMAGES

DIGITAL ZOOM

DIGITISING IMAGES

TYPES OF ORIGINALS

Photographic Prints Proof Sheets

Transparencies Printed Material

Colour negatives Objects

Slides Maps

Glass Plates Engravings

Original Artworks

Newspapers

DIGITISING IMAGES

EQUIPMENTFlatbed 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

DIGITISING IMAGES

OVERVIEW

Terminology

Types of Originals

Equipment Used

Resolutions & Image Formats

What’s Next

DIGITISING IMAGES

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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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

FILE SIZES

DIGITISING IMAGES

TIFFRGB

TIFFCMYK

JPEGLoss Less

JPEGMod. 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

FILE TYPES

DIGITISING IMAGES

WHAT’S NEXT?

• Embedded Meta Data in the Image file

• Pict Bridge

• Adobe Photoshop CS2

• XML and Dublin Core

DIGITISING IMAGES