Digitizing Curves

Command:

Tools -> Digitize Curves...

Digitization of recorded measurements which are not available in digital form is still a common problem. Be it old chart recordings on paper, or published charts in a magazine, or images generated by some measurement device - you always have the problem of transferring printed (analog) data into digital data. Since automatic transform into vector image formats usually delivers poor perfomance (e.g. by mixing up data with the background grid), the only way to handle this problem is to use human interaction.

DataLab supports this process by providing a simple but efficient digitizing tool, which lets you set points of a curve on a calibrated chart. The calibration requires undistorted images; however, these images may be rotated at any degree.

In principle, generating digital data from a printed chart is a four-step process:

• loading the image
• specify the data points on the interesting curve
• calibrating the image
• storing the digitized results