Description: Tutorial explains automatically digitizing line graphs
Keywords: Engauge Digitizer, browser based documentation, online manual, Digitize Line Graph Tutorial

## Engauge Digitizer - Automatic Line Graph Tutorial

### Automatically Digitizing A Line Graph Image

The following steps automatically digitize a linear cartesian graph with one curve./P>

- Import the testcase.png case from the Samples directory, using File/Import as shown. Not shown are the other methods of importing: using the "-import" command line option, by copying and pasting, and by dragging and dropping

- Click on the Axes Point button before entering axes points. These will define the coordinate system

- Click on one of the axes to add the first axes point, then enter its graph coordinates

- Click on one of the axes to add the second axes point, then enter its graph coordinates

- Click on one of the axes to add the third axes point, then enter its graph coordinates

- View the processed image by selecting the View/Processed Image menu option.

- Tune the discretize settings using the Settings/Discretize menu option, so unwanted information in the image is removed. The dialog that appears is explained at Discretize Dialog.

- Remove the grid lines from the original image using the Settings/Grid Removal menu option, so unwanted information in the image is removed. The dialog that appears is explained at Grid Removal Dialog.

- Click on the Segment Fill button.

- Click on each segment of the curve to add regularly spaced curve points along that segment. Repeat until points have been created for all of the segments in the graph.

- Export the curve points into a tabular text file using the File/Export As menu option as shown. Not shown are the other methods of exporting the curve points from the curve geometry window: copying and pasting, and dragging and dropping