1. Introduction to Graphics

2. Terms n Computer Aided Design (CAD) –using computer graphics to draft a model, can be tested on screen n Computer Aided Manufacturing (CAM) –integrating the CAD information to determine the best overall manufacturing procedures

3. CAD/CAM

4. Terms n Pixel –Short for “Picture Element”, it is the smallest unit that appears on the Visual Display Unit n Resolution ( 解像度 ) –the maximum number of pixels that can be displayed on a VDU, e.g., 800 x 600

5. Terms n Bitmap graphics ( 點陣圖像 ) –defines image as a collection of dots (pixels) –image generally requires more storage space

6. Terms n Bitmap graphics –used in painting software such as: MS Paint, PC Paint Brush, etc. –scanner, digital camera and fax machine use bitmap graphics to produce/store images

7. Bitmap Graphics - Example Smoothness cannot be maintained when the image is enlarged.

8. Terms n Vector graphics ( 向量圖像 ) –defines image mathematically as a set of instructions for creating the object in the image –e.g., rectangle(top, left, bottom, right, line_style, color, …) (0, 0) (50, 20)

9. Terms n Vector graphics –image generally requires less storage space –used in drawing software such as: PowerPoint, CorelDraw, etc. –most clipart images use vector graphic format.

10. Vector Graphics - Example As the image is mathematically defined, smoothness can be maintained when the image is enlarged.

11. Comparison Vector GraphicsBitmap Graphics Object oriented Less storage space Less special screen effects Pixel oriented More storage space More special screen effects Edit pixel individuallyEdit whole object

12. File Type Vector GraphicsBitmap Graphics WMFGIF JPEG/JPG BMP

13. Terms n Object –a component defined in vector graphic software such as drawings, text, chart and clipart, etc. Texts

14. Terms n Attribute ( 屬性 ) –an object’s properties i.e., line color, shadow, filled color, etc.

15. Terms n Handle a small square that appears on the edge when an object is selected controlling the size of the object

16. Presentation Graphics n PowerPoint is a presentation graphics software n Enables you to prepare slide presentation

17. Making Slide Show n opens a new document n switches to “Outline” view n organises your outlines n applies appropriate slide layout n applies appropriate slide design

18. Slide Show Effects n Transition effect –how the slide is changed n Build effect –how the bulleted text and other objects are shown

19. Adding Effect n switches to “Slide Sorter” view n selects effect from “Transition” tool box n selects effect from “Build” tool box if there are bulleted texts

20. Adding Custom Effect n PowerPoint also enables you to add custom animation effect to your slide object by right - clicking the object and selects “Custom Animation”.

21. Inserting Objects n Objects –clipart –chart –graphic image –sound n Menu Command –Insert ( 插入 ) >> Objects ( 物件 )

22. Exporting Graphics Image n PowerPoint supports GIF & JPEG graphics format, you can export your slide(s) by modifying the “File Type” in “Save As…” menu command.

23. Importing Text n Text can be imported to your slide by executing the following menu commands: –Insert > Object > MS Word Document n When the object shown, executes the following menu commands to import text: –Insert > File

24. Questions n Give 3 differences between a vector graphics and bitmap graphics software. n Explain why an image created by a low resolution graphics program will normally not be made sharper even if it is imported to a high resolution graphics program.