week 3- rana,eric,chun yeap

I. Vector and Bitmap Graphic

Vector graphics are constructed using mathematical formulas describing shapes, colors and placement. Rather than a grid of pixels, it consists of shapes, curves, lines, and text which together make a picture. While bitmap image contains information about the color of each pixel, a vector graphic contains instructions about where to place each of the components. It is even possible to embed a bitmap graphic within a vector graphic, which is how vector-bitmap graphic work. It is not possible, however, to embed vector information within a bitmap. A vector graphic, when resized, would still have the same quality.

Bitmap Graphics, also called raster graphics, are created down from rows of different colored pixels that together form an image. In the simplest form, bitmaps have only two colors, with each pixel being either black or white. With increasing complexity, an image can include more colors; photograph-quality images may have millions. Unlike vector, when looked closely, it would not be able to maintain the same quality for one would see dots.

II.

For background purposes, one would preferably use bitmap graphics because we would not need vector like quality for this matter, unless necessary. Another is, Bitmap editor programs are easily available and more popular than those of the vector graphics which makes it more accessible for public use. Lastly, raster are digital images representing a surface, a material, a pattern or even a picture that's static which makes it a choice for background.

For buttons, one would use vector for better quality. One would use vector images since the quality of the picture, even though it has been moved to another location or resized, would still remain the same unlike those raster images. Buttons would need to be intact due to the user’s preference on how one would like one’s menu or buttons to appear.

For icon one would use bitmap since it is static and would not necessarily need to be made into a vector.

For texts, it depends, usually depends on the site whether the text is needed to be in vector or bitmap. It would depend on how the text would be used in the site or how the developer would want the text to appear on the web.