imageCentroids
Return to directory of Todd's CASA extensions
Runs
imageCentroid for a list of images.
Usage:
au.imageCentroids(images, threshold=0, axis3channel=None, axis4channel=None,
fractionalThreshold=None, aperture=None, crpixOffset=None,
verbose=False, normalize=False, radec=False, prec=3,
keepThresholdImage=False, sigmaThreshold=None, blc=None,
trc=None, radialThreshold=None)
Inputs:
- threshold: the pixel value below which to ignore when finding the centroid
- fractionThreshold: threshold value with respect to the peak pixel value
- sigmaThreshold: set threshold to this number of sigma in the image
- axis3channel: which channel to use on 3rd axis (default=all)
- axis4channel: which channel to use on 4th axis (default=all)
- aperture: diameter in arcsec within which to measure flux density
- crpixOffset: compute offset from ref pixel in units: 'pixel', 'arcsec', 'mas', or 'rad'
- verbose: if True, print all flux stats
- normalize: if threshold is set, then set all pixel values to 1.0
- radec: if True, return the centroid position in RA,Dec rather than pixels
- prec: digits of precision to display after the decimal
- keepThresholdImage: write a new image corresponding to the threshold
- radialThreshold: maximum radius in pixels from image center to consider when threshold is set (use this to avoid distant noise spikes)
Returns:
Example:
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ToddHunter - 2015-01-21