Rotation Technique in Radially Symmetric Electron Micrographs: Mathematical Analysis

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Science  27 May 1966:
Vol. 152, Issue 3726, pp. 1238-1239
DOI: 10.1126/science.152.3726.1238


The rotation operation of order m operating on a signal removes all spatial frequencies not multiple to m. Anomalous reinforcements, causing misinterpretation, can be discounted without following previously suggested restrictions. The improvement in signal-to- noise ratio is less than m, in contrast to signal averaging of electrophysiology. A dove prism and stroboscope can implement the technique.