Abstract
Computed tomography (CT) can be used for dimensional measurement. Reliable results require an effective artefact correction. In two earlier papers a Synchronous Artefact Correction (German: Einsatzsynchrone Artefakt-Reduktion EAR) was introduced. In this paper some further developments of EAR are given though the key concept isn´t altered. It is still two-staged with a separation in fine and coarse registration, the latter is subdivided into translation and rotation. For the coarse rotation the idea of the Overall Cachment Area is applied. In-depth tests favoured “Normalized Mutual Information” that was only second-best in the prime research. Another topic is the analysis of the accuracy of the registration result concerning the applied similarity measure. In this test “Normalized Mutual Information” was figured out to be the measure with the highest accuracy.
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