Description: Requirements for automatic point matching in Engauge
Keywords: Engauge Digitizer, browser based documentation, online manual, Point Graph Requirements

## Engauge Digitizer - Point Match Requirements

### Separation of Points

Engauge is limited in terms of types of point graphs that can be automatically digitized in point graph mode.

The point graph on the left below may be automatically digitized by Engauge, because each point is easily distinguished from its closest neighbors. Engauge will recognize the 22 points.

The point graph on the right below cannot be automatically digitized by Engauge, because every point is connected to its neighbors. Even worse, some points are overlapping. In this case, Engauge will not be able to distinguish each curve point its neighbors, and from the curve line.

Your point graph should look more like the left figure if you wish to use point graph mode.

### Image Size

Point Matching involves a lot of mathematical calculations, and a lot of computer memory, especially for larger images.

Engauge can easily handle a 2000x2000 pixel image, on a 512 megabyte Linux system. However, larger images and reduced memory may cause problems.