horizontal rules

Clip Art for Horizontal Rules
Dixie Allan

Horizontal Rules are long, medium or short lengths of bar, scroll or other decorative image, either animated or static, plain, colored or patterned, or ornately designed. They are used to divide one area of a Web page from another or to separate and highlight a section of text from another text area.

Horizontal rules are also called dividers, rules, separators, bars, lines and line bars.

It is important to know the difference between vector and bitmap clip art.

Bitmap files are also called Raster files. Bitmap images are made up of pixels in a grid. The size of the grid is based on the image's resolution. For example, a bitmap-based image of 1 inch x 1 inch with a 600 dpi resolution would be defined by a grid of 600 x 600 pixels. A bitmap-based image is like a mosaic of pixels with each pixel holding a specific color value.

Bitmap-based files are more suitable for photo-realistic images that require complex color variations.

They are, however, not easily re-sized because each bitmap-based image is mapped to a non-flexible grid. If a bitmap-based image were to be enlarged, it would lose sharpness – the edges within the image would appear to be jagged or fuzzy.

Vector-based images generally contain well-defined elements such as curves and shapes of various colors. Each element is defined mathematically by the computer. For example, if a vector-based image contains a red dot, then information such as the location of the circle's center point, the length of its radius, and the color red would be the essential information for this image file.

Vector-based files are more suitable for illustrations that require precise measurements.

They are also easily re-sized due to their mathematical nature. However, the vector-based file format has its drawbacks as well. It is not good for displaying photo-realistic images such as a photograph because images of this type generally do not contain well-defined shapes and curves.