radextract        extract 2D Radon transform from 3D Radon transform

 

image format: SPIDER

Purpose: Extract a central section through a 3D Radon transform at arbitrary
         angle. The inverse of the extracted transform is theprojection et
         the pecified angle. 

USAGE:        rad extract

        .Input 3D Radon file: rad3d001
        [Enter input 3D Radon transform. This may also be the Fourier
         transform of the Radon transform.]
        
        .Output 2D Radon file: rad2d001
        [Enter tha name of the output 2D Radon transform. If the input is
         Fourier, then the output is also Fourier.] 
        
        .angles phi, theta, psi: 35,60,40
        [Enter the angles for the extraction of the radon central section.]         

        .ang. increment of output transform: 2.
        [Enter the angular increment to be use din the 2D output transform.]

Programs: picrad.f, extractradon.f and support routines. 
          Some programs extracted from SPIDER.

Author(s): M.Radermacher