Study on the Structure Sensor Pro accuracy and repeatability

Launched in July 2021, the Structure Sensor Pro [1] is the first 3D scanning sensor from Occipital to take into account the needs of our customers in healthcare and fitness. Continuing to focus on the needs of our customers, on November 19th we made available a white paper [2] that explains why this sensor is the best-in-class portable sensor for healthcare applications.

The paper includes a quantitative study of the perimeter measurements of pipes, used as a reference for human limb measurement, allowing Occipital to quantitatively compare this sensor to its predecessors and report on significant improvements in reconstruction accuracy and repeatability. The paper also explains what settings of the Structure SDK [3] to use in order to achieve the reported results, in addition to further improvements in accuracy achieved using the latest features made available exclusively to the Structure Sensor Pro, such as Depth Refinement and custom window size.

The paper abstract is reproduced below:

Measurements of the perimeter of 3D meshes reconstructed using the Pro version of the Structure Sensor present a mean relative error of 0.96%, with a scan-to-scan repeatability of 0.41%. In addition, RMSE measurements as good as 1.30mm have been demonstrated when the Structure Sensor Pro is used in combination with its new depth refinement features. In comparison with previous versions of the Structure Sensor, the Pro version presents, on average, a sensor-to-sensor variability that is at least 5.28 times better, setting this sensor apart as best-in-class for compact and portable scanning applications in which accuracy and repeatability are critical, such as healthcare.

References:

[1] Occipital, Inc., Structure Sensor Pro web page.

[2] Occipital, Inc., Human Limb Scanning with Improved Accuracy Using the Structure Sensor Pro, Boulder, Nov. 2021.

[3] Occipital, Inc. Developer web page.