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Accuracy and Precision (Temporal Noise)#

Basler blaze-101 cameras are calibrated for a measurement range of 0.5–5.5 m.

This is where they deliver best results. Technically speaking, the camera is capable of measuring distances up to 10 m. Accuracy and precision are the key characteristics for judging the quality of the measurement results.

General#

  • Accuracy
    Accuracy is the mean difference between the measured distance and the true distance. It is a description of systematic errors. To achieve a result as accurate as possible, blaze-101 cameras are calibrated at the factory and tested to guarantee a reliable accuracy.
  • Precision
    Precision is the standard deviation of accuracy. It is also called temporal noise or repeatability.

The following diagrams illustrate the relation between the two aspects:

Diagram Showing Relation Between Accuracy and Precision Measurement Results Illustrating Difference Between Accuracy and Precision

Accuracy Testing of blaze-101 Cameras#

Accuracy and precision of blaze-101 cameras are measured under the following uniform conditions:

  • Camera at default settings
  • Stable operating temperature (20 minutes camera warm-up time)
  • Flat, white target with 90 % reflectivity
  • No ambient light
  • 22 °C room temperature
  • 40 x 40 pixels in the center of the range map
  • Averaged over 25 images

Test Results#

Accuracy (Systematic Error)#

The following diagrams show the measurement accuracy to be ±5 mm. For visualization purposes, the test results have been placed around the 0 error line.

Accuracy of blaze-101 Cameras in Long Range

Accuracy of blaze-101 Cameras in Short Range

Precision (Temporal Noise)#

Precision of blaze-101 Cameras in Long Range

Precision of blaze-101 Cameras in Short Range