interferogram: Interferogram object
In matwey/Rfringe: Rfringe

Description Usage Arguments Details Value Note Author(s) See Also Examples

Creates an instance of an interferogram object.

1	interferogram(filename)

filename

The name of a graphics file in “Portable Anymap” format

Provides an “object oriented” framework for analysis of interferograms. A call of the form .thisint <- interferogram("myinterferogram.ppm") creates an “instance” of an interferogram object. All functions for processing the interferometry data are returned with the function call.

The current version only supports graphics files in “Portable Anymap” format, and RGB files are converted to grayscale using the R channel only on the assumption that almost all interferograms will use a He-Ne source.

If interferogram() is called from the Rfringe GUI ImageMagick's (http://www.imagemagick.org) convert tool is used if necessary to convert from any graphics format supported by ImageMagick to pnm format. This means that convert must be present and on the search path if this feature is to be utilized. In Windows it also means that the path to the ImageMagick installation must be placed earlier in the path list than system files, since there is also a system convert command.

A list with the following components:

`ev`	The environment of the `interferogram()` function call
`isInterferogram`	Identifies this object as an interferogram
`image.info`	Data entry function - Basic image information
`analysis.info`	Data entry function - Information required in wavefront analysis
`target.conic.info`	Data entry function - Target conic in single pass tests
`circle.pars`	Image analysis function - Outline aperture edge
`obstruct.pars`	Image analysis function - Outline obstruction (perforation)
`plot.fringes`	Plot function - Plots fringe trace
`autotrace`	Image analysis function - (Semi) automatic fringe tracing
`clearpoints`	Image analysis function - Fringe editing
`addpoints`	Image analysis function - Fringe editing
`clearfringe`	Image analysis function - Fringe editing
`retrace`	Image analysis function - Fringe editing
`addsegment`	Image analysis function - Fringe editing
`insertfringe`	Image analysis function - Fringe editing
`fitzernikes`	Image analysis function - Least squares fit to fringe centers
`plot.si`	Plot function - Synthetic interferogram
`plot.wf`	Plot function - Wavefront map
`plot.contour`	Plot function - Cross sections of wavefront along selected diameters
`plot.wf3d`	Plot function - Interactive 3d plot of wavefront (requires package `rgl`)
`plot.residuals`	Plot function - Some possibly useful diagnostic plots of residuals from least squares fit
`plot.startest`	Plot function - Star test simulation with optional MTF plot
`print.summary`	Output function - Prints basic summary statistics to the console window
`print.details`	Output function - Prints more details of estimated Zernike coefficients
`print.latex`	Output function - A printable detailed report, in pdf format (requires `pdflatex`)

These functions will rarely be accessed directly at the command line if the GUI is used.

M.L. Peck mpeck1@ix.netcom.com. Thanks to Steven Koehler for valuable programming ideas, especially his approach to object instantiation in R.

Rfringe, project, pixmap.

  ## Not run: 
    .thisint <- interferogram("myinterferogram.ppm")  # create an interferogram object
    .thisint$circle.pars()	#interactively outline the aperture edge
    .thisint$obstruct.pars()	#outline the obstruction
    .thisint$autotrace()	#trace the fringes
    .thisint$fitzernikes()	#do the least squares fit
    .thisint$plot.wf()		#plot the wavefront
    .thisint$print.summary()	#print some basic summary stats
  
## End(Not run)