The difference between images and graphics?

Text can be edited for example by changing one letter in to another letter:

Example:

BOOT > BOAT

The second "O" has been changed into an "A" Thsi hadÅ› nothing to do with the image on screen it is an edit in the code behind the presentation and would change the "O" to an "A" in any typeface or font size.

If you look real closely at your monitor you should be able to see that the image is built up of small dots that really are red green and blue, these are called sub-pixels. Each group of a red, green and blue sub-pixel is a pixel (picture element).

Graphics can be pixel base or vector based.

Graphics that are pixel-based, when enlarged get "jaggy" - diagonal lines become like stairs (change your screen resolution to 400 x 600 or something low to get an idea or use the Ctrl and + key in your browser when looking at images),. Editing pixel graphics is a matter of changing the red green and blue value of pixels.

Vector graphics are more like the SHAPE of the letters on your screen (most of them anyway are vector based. With vector graphics a mathematical representation of a curve is defined as the edge of a shape and this can be enlarged indefinitely without those "jaggies" appearing.

Vector graphics can also define changes from one color to another mathematically so that the transition is smooth"