COLBIAS

Name

colbias

Purpose

Determine and subtract column-wise overscan correction with cropping.

Description

Calling Sequence

result=colbias(array,x1,x2,xc1,xc2,yc1,yc2)

Inputs

array - Input array to perform operation on (2-D)
x1 - First column for overscan region
x2 - Last column for overscan region
xc1 - X coordinate of LLHC of sub-array to save (default=0)
xc2 - X coordinate of URHC of sub-array to save (default=last pixel)
yc1 - Y coordinate of LLHC of sub-array to save (default=0)
yc2 - Y coordinate of URHC of sub-array to save (default=last pixel)

Optional Input Parameters

Keyword Input Parameters

Outputs

return value is the overscan corrected, cropped image.

Keyword Output Parameters

BIASVAL - the mean of the overscan area is returned.
NOISEVAL -the standard deviation of the overscan area is returned.

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

95/06/13 - Initial version written, Marc W. Buie, Lowell Observatory
2000/02/05, MWB, minor bug fixed when overscan region started at 0.
2000/11/19, MWB, added support for new data types
2001/01/22, MWB, changed so bias region is clipped by crop region.
2006/06/30, Peter L. Collins, Lowell Observatory
add NOISEVAL output keyword.