Image and volume data rotation with 1- and 3-pass algorithms.
Three different implementations of the 3-pass algorithm of image and volume data rotation are illustrated and discussed. The three protocols use interpolation in real domain, with a peculiar implementation of the Shannon reconstruction, or phase shifts in Fourier domain. Accuracy and speed of the three methods are compared with corresponding values obtained with a 1-pass method. The results indicate that for low or moderate accuracy, 1-pass is more convenient than 3-pass rotation for both accuracy and speed. Very accurate rotations can be obtained in reasonable time if all steps of 3-pass rotation are performed in the Fourier domain.
Tosoni
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L
Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università degli Studi, Milano, Italy.
Lanzavecchia
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S
Bellon
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PL
D000465:Algorithms; D003627:Data Interpretation, Statistical; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000706:statistics & numerical data*; D012399:Rotation