Graphics Manipulation 8 Mar 2001 10:30am - 12:00pm 2:30pm - 4:00pm.
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Transcript of Graphics Manipulation 8 Mar 2001 10:30am - 12:00pm 2:30pm - 4:00pm.
8 Mar 200110:30am - 12:00pm
2:30pm - 4:00pm
Topics
Working with imaging devices
Prepare images for your web page
Software Tools
Introduction to Colour Management
Acquire Images from Image Devices
Digital Camera/Scanner TWAIN standard
What is TWAIN
A standard software protocol and Applications Programming Interface (API) that regulates communication between software applications and imaging devices.
www.twain.org
TWAIN API
TWAINAPI
Scanner
Digital Camera
PhotoShop
Corel-Photo Paint
Paint Shop Pro
Prepare Graphics for your WEB
Keep the file size small with reasonable
quality
Less space and less transfer time
Select suitable format
JPEG, GIF/Animated GIF?
Properties of JPEG
High compression ratio (about 10~100+ to 1)
Small file size True colour (24bits, 16.7M) image Lost of details
Properties of GIF/Ani. GIF
Good compression ratio Lost-less compression Only 256 simultaneous colour Colour palette stored in file
When to use JPEG?
Colourful photo Large image True colour needed Detail is not the 1st priority
When to use GIF/Ani. GIF?
Banner, title Bullet, icon Separation line, etc
Image with compression
Image 1:Format: JPEGComp. Factor: 15Dim.: 157 x 239 pixelsFile size: 9500 Bytes
Image with compression
Image 2:Format: JPEGComp. Factor: 85Dim.: 157 x 239 pixelsFile size: 2847 Bytes
Software Tools
“Draw” or “PAINT” type software PhotoShop, Corel Photo-Paint, PhotoImpact,
Paint Shop Pro and so on... “Optical Character Recognition”(OCR) Animation creator Word processor
Intro. To Colour Management
To overcoming device dependence Colour-Matching Systems
– PANTONE® Matching System Electronic Colour Management Software
– Kodak Precision Color Manager– Corel Color Manager
Colour Space
Colour Matching System
A collection of colors from which you can select colors for use
A swatchbook used as reference Each color has it own color code
– e.g. PANTONE®274VC Designate the color code you want
Colour Manager
A software utility that works to ensure accurate colour reproduction across the devices in your system
Each devices calibrated with a profile Profile accurately defines the capabilities of
your devices
THE END
Thank you