ON-LINE 2D DIGITAL IMAGE CORRELATION

by MESOCOS

In order to make Digital Image Correlation (DIC) easily available for engineers, scientists, and students from all over the world, we have developed a simple three-step approach. Send us the images taken during the experiment, we will calculate the 2D displacement and deformation fields for you, and you can do the postprocessing of results by yourself in our free user-friendly DIC software.
 

measurement-line

Image acquisition

First, conduct the experiment and take high-resolution images of your specimen surface with a random contrast pattern - natural or artificial. Please, follow our instructions below.

Cloud DIC data

Upload and DIC analysis

Upload the images to a cloud or repository (e.g., Dropbox, Google Drive, or server at your disposal) and send us the link. We will specify the exact cost based on estimated computation time and start the calculations.

Cloud DIC data

Download the data and free software

Once the DIC analysis is finished (about 1 to 7 days, depending on the size of your project) we will send you an invoice and provide a download link to your results. The results can be easily processed in our free MESOCOS DIC Viewer.

PRICING

An approximate price for processing one image with rectangular region of interest and size about 2 MB is $4.0 / €3.3.

The free MESOCOS DIC Viewer can be downloaded here. You can watch the software tutorial on our YouTube channel or here:

IMAGE ACQUISITION

DIC pattern

Random pattern application

DIC can be done only if there is a contrast random pattern (natural or artificial) on the observed surface. The size of speckless depends on a scale of the experiment and required density of the displacement/deformation fields. As a rule of thumb, the speckles should have their size about 2-10 pixels, and the ratio dark and light spots should be ranging between 3:7 and 7:3.

There are several ways how to apply a pattern onto tested specimens. Spray or spray guns are most frequently used for the ease of application, satisfactory outcomes, and reasonable cost.

DIC measurement

Camera setting

In order to provide undistorted images, the camera must be perpendicular to the observed surface and fixed, e.g., on a tripod. A powerful illumination allows setting of a low ISO pareter to avoid noisy images, sufficient depth of field and low shutter speed. And there is one simple rule: the higher the resolution, the better the DIC results.

It is advised to use remote shooting trigger or setting an automatic shooting in regular intervals. About 50 mm focal length is usually optimum to avoid a fish-eye distortion. It is important that the images are taken in short intervals, so that there are maximum displacements approximately 2% of the specimen size between individual steps.

It is necessary to know a reference length (e.g., size of the tested specimen) or take one photo with a measuring tape attached to the specimen for scaling of displacements.

CONTACT US

Being a dynamic team of scientists / engineers we are keen to accept challenges and join new projects.
If you are interested in our services, do not hesitate and leave us a message.