fftavg

This program reads a set of images, transforms them, and generates and averaged power spectrum

fftavg <apix> <image file>

fftavg <apix> <Image 1> <Image 2> etc

Parameters:


<apix>A/pixel
<image file>Reads all images from a multi-image file

<apix>A/pixel
<Image 1>First image
<Image 2>Second image
etcetc.

Usage:

fftavg im*.mrc

fftavg 2248.img

Description

This program reads a set of images (all the same size), does an FFT of each, then averages them to generate an approximate power spectrum. This functionality is already incorporated into ctfit, but this program may still be useful for offline calculations. An x/y plot of the power spectrum is dumped to stdout, and the averaged image is output to fftavg.tnf (a complex MRC file)


EMAN Manual page, generated Wed Feb 18 10:33:43 2009