Accuracy is the maximum difference between the measured value and the actual value; the smaller the difference between the measured value and actual value, the greater the accuracy.
Accuracy in machine vision would mean the degree of error (or difference) between the digital representation of the target object and the actual object itself. Accuracy is imperative for industries that require a high degree of exactness in dimensional measurement. For example, a planing mill needs to make dimensional lumber that conforms to the wood industry. Industrial components should have product performance that provides good accuracy and precision. To read more about precision, please visit the glossary page for precision.
Accuracy is a measure oftentimes paired with precision. The following diagrams illustrate what good/bad accuracy and precision each means.