image filter

A routine that changes the appearance of an image or part of an image by altering the shades and colors of the pixels in some manner. Filters are used to increase brightness and contrast as well as to add a wide variety of textures, tones and special effects to a picture.

Original

The original painting was photographed and scanned into the computer. The following images were created in Photoshop by applying a filter to the original. (From "Moonlit Gladiolas" by Barbara Postel. Image courtesy of Pyramid Studios, www.artistexpo.com)

Gaussian Blur Filter

Solarizing Filter

Find Edges Filter

Glowing Edges Filter

Embossing Filter

Changing Expressions

It is widely known that image editing can make sweeping changes as in the picture sequence before this one. But subtle changes are also possible. Look at the eyes in the original picture (top) compared to the bottom, which was changed in Corel's PhotoPaint using the Mesh Warp filter. (Image courtesy of Corel Corporation.)