A graphic is any type of visual presentation that can be displayed on a physical surface such as a sheet of paper, wall, poster, computer monitor, etc. These are products of human imagination and are typically created by hand or with computer-assisted drawing and design tools.
An image is a two-dimensional or three- dimensional representation of a person, animal, object, or scene in the natural world. Images can be still or moving. A still or static image is one that is fixed in time. A moving image , or time-based image, is one that changes over time.
Raster Vs. Vector Images:
A raster is formed by dividing the area of an image into a rectangular matrix of rows and columns comprised of pixels. The total number of pixels in a raster is fixed.
- Advantage: Ideal for images with lots of color information and complexity.
- Disadvantage: Since the number of pixels are fixed, image quality deteriorates when enlarged. For example; scaling, resampling, and anti-aliasing.
Vector imaging defines the area of a picture using paths made up of points, lines, curves, and shapes. Each vector path forms the outline of a geometric region containing color information.
- Advantage: Because paths can be mathematically resized, vector pictures can be scaled up or down without losing any picture clarity.
Why should you avoid upscaling when possible?
Upscaling often results in a noticeable loss in image quality(increased blurriness).
What is the difference between Aliased and Anti-Aliased text?
Aliased text gives off the stair-step effect which is the most pronounced along the curved segments of a stroke. Anti-aliasing smoothes out the edges by blending the color transition points.
Anti-Aliasing Vs Aliasing
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