1.1.1.0 image.modify

NRAO Home > CASA > CasaDocument

image.modify - Function

1.1.1 Modify image with a model
Description

This function applies a model of the sky to the image. You can add or subtract the model which is contained in a Componentlist tool.

The pixel values are only changed where the total mask (combination of the default pixel mask [if any] and the OTF mask) is good (True). If the computation fails for a particular pixel (e.g. coordinate undefined) that pixel will be masked bad.

Arguments


Inputs
model	Record representation of a ComponentList model
	allowed:	any
	Default:	record
region	The 2-D region of interest. Default is whole image.
	allowed:	any
	Default:	record
mask	OTF mask, Boolean LEL expression or mask region. Default is none.
	allowed:	any
	Default:	variant
subtract	Subtract or add the model
	allowed:	bool
	Default:	true
list	List informative messages to the logger
	allowed:	bool
	Default:	true
async	Run asynchronously?
	allowed:	bool
	Default:	false

Returns
bool

Example

"""
#
print "\t----\t modify Ex 1 \t----"
ia.maketestimage()
clrec = ia.fitsky()
ia.modify(clrec[’return’])
ia.close()
#
"""

In this example we subtract the model returned by the fitsky function.

[next] [prev] [prev-tail] [front] [up]

Please send any comments or questions about CASA or AIPS++ to aips2-requests@nrao.edu

This code is available under the terms of the GNU General Public Lincense