2. Chapter 2 File Format

3. Objectives (1 of 2) Identify the difference between vector based graphics and bitmap-based graphics Clarify 3 types of vector programs Converting bitmap graphics to vector graphics and vice versa

4. Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon(s), which are all based on mathematical equations, to represent images in computer graphics. primitivespointslinescurvespolygonimages computer graphics Vector-based graphics

5. Vector File Formats AI - Adobe Illustrator CDR - CorelDraw CMX - Corel Exchange CGM - Computer Graphics Metafile WMF - Windows Metafile

6. Vector Editing Programs Adobe Illustrator CorelDraw Macromedia Freehand Macromedia Flash

7. Resolution independent Key Points on Vector Images Scalable No background Cartoon like Inappropriate for photo realistic images

8. A representation, consisting of rows and columns of dots, of a graphics image in computer memory.columns dotsgraphicscomputer memory The value of each dot (whether it is filled in or not) is stored in one or more bits of data. storedbitsdata For simple monochrome images, one bit is sufficient to represent each dot, but for colors and shades of gray, each dot requires more than one bit of data.monochrome The more bits used to represent a dot, the more colors and shades of gray that can be represented. Bitmap – based graphics

9. Example…

10. Bitmap File Formats BMP GIF JPEG, JPG PICT PCX TIFF PSD (Adobe Photoshop)

11. Bitmap Editing Programs Microsoft Paint Adobe Photoshop Corel Photo-Paint Ulead PhotoImpact

12. Pixel in a grid Resolution dependent Resizing reduces quality Key point on Bitmap Images Easily converted Restricted to rectangle Minimal support for transparency All scanned images and images from digital cameras are bitmaps