2. Graphics Manipulation 8 Mar 2001 10:30am - 12:00pm 2:30pm - 4:00pm

3. Topics u Working with imaging devices u Prepare images for your web page u Software Tools u Introduction to Colour Management

4. Acquire Images from Image Devices u Digital Camera/Scanner u TWAIN standard

5. What is TWAIN u A standard software protocol and Applications Programming Interface (API) that regulates communication between software applications and imaging devices. u www.twain.org

6. TWAIN API TWAIN API Scanner Digital Camera PhotoShop Corel- Photo Paint Paint Shop Pro

7. Prepare Graphics for your WEB u Keep the file size small with reasonable quality u Less space and less transfer time u Select suitable format u JPEG, GIF/Animated GIF?

8. Properties of JPEG u High compression ratio (about 10~100+ to 1) u Small file size u True colour (24bits, 16.7M) image u Lost of details

9. Properties of GIF/Ani. GIF u Good compression ratio u Lost-less compression u Only 256 simultaneous colour u Colour palette stored in file

10. When to use JPEG? u Colourful photo u Large image u True colour needed u Detail is not the 1st priority

11. When to use GIF/Ani. GIF? u Banner, title u Bullet, icon u Separation line, etc

12. Image with compression Image 1: Format: JPEG Comp. Factor: 15 Dim.: 157 x 239 pixels File size: 9500 Bytes

13. Image with compression Image 2: Format: JPEG Comp. Factor: 85 Dim.: 157 x 239 pixels File size: 2847 Bytes

14. Software Tools u “Draw” or “PAINT” type software u PhotoShop, Corel Photo-Paint, PhotoImpact, Paint Shop Pro and so on... u “Optical Character Recognition”(OCR) u Animation creator u Word processor

15. Intro. To Colour Management u To overcoming device dependence u Colour-Matching Systems – PANTONE® Matching System u Electronic Colour Management Software – Kodak Precision Color Manager – Corel Color Manager

16. Colour Space

17. Colour Matching System u A collection of colors from which you can select colors for use u A swatchbook used as reference u Each color has it own color code – e.g. PANTONE®274VC u Designate the color code you want

18. Colour Manager u A software utility that works to ensure accurate colour reproduction across the devices in your system u Each devices calibrated with a profile u Profile accurately defines the capabilities of your devices

19. THE END Thank you