Snowbound Software’s VirtualViewer web viewer and SnowView have several features that allow you to change the appearance of an image. One of these tools is the Alias/Anti-alias tool. This tech tip describes how to use the Alias/Anti-alias tool to improve the appearance of an image.
Aliasing is a process by which smooth curves and other lines become jagged because the resolution of the display or the graphic file is not high enough to represent a smooth curve. Anti-aliasing is a software technique used to diminish ‘step-like’ lines that should be smooth. Anti-aliasing surrounds stair steps with intermediate shades of gray, or gray scaling, for 1-bit images or color for color images.
The image below shows an example of aliasing and anti-aliasing:
|None||Aliasing is not turned on.|
|Preserve Black||Checks neighboring pixels for any black so that any small black lines are not removed when scaling a large black and white image. The Preserve Black option is typically recommended for large schematics and engineering drawings.|
|Scale to Gray||Converts the image to gray scale values when displaying a large image. The Scale to Gray option is typically recommended for documents.|
|Quality||Higher quality setting improves the quality of 1-bit (B&W) images.|