
Visualization Options

image   : display image
backgnd : display image
signif  : display image

show image        : image 1 or object 1
show background   : image 2 or backgnd 1
show significance : image 3 or signif 1
show residual     : image 2 or resid 1

XXX: these all need to have the image:
show peaks        : object 1 or peaks 1
show moments      : object 2 or image.moments 1
show footprints   : object 3 or footprints 1
show rough class  : object 3 or class 3
show flags        : (disabled)
show size class   : object 2 or class 2
show petrosian    : object 2 or petro 1

plot final moments (2D) : moments 1  
plot test moments (2D)  : moments 2
plot source sizes : class 1 
plot ap resid     : apresid 1
plot chisq        : chisq 1

show PSF model    : psf 1
show PSF stars    : psf 2
show Sat stars    : ?

show radial profiles : profile 

petrosian visualization:

  psphotPetrosianVisualEllipticalContour
  psphotPetrosianVisualStats
  psphotPetrosianVisualProfileRadii
  psphotPetrosianVisualProfileByAngle

psphot visualization in psModules:

 pmSourceVisualPSFModelResid
 pmSourceVisualShowModelFit
 pmSourceVisualShowModelFits
 pmSourceVisualPlotPSFMetricSubpix
 pmSourceVisualPlotPSFMetric
