CImage:PolyFitDiv

The PolyFitDiv method fits a 2-D polynomial of intensity versus position and divides it into the image.

Syntax

bSuccess = CImage:PolyFitDiv( ct, rt )

bSuccess = CImage:PolyFitDiv( ct, rt, bConserve )

bSuccess = CImage:PolyFitDiv( ct, rt, bConserve, CRect )

where

ct is the number of column fit terms, 1 to 10.

rt is the number of row direction fit terms, 1 to 10.

bConserve preserves the central sigma level, defaults to true.

CRect defines a CRect rectangle to be excluded from the fit. If omitted or nil, the entire image is fit.

bSuccess is the returned success code. On success it is true, otherwise false.

This method fits a polynomial to the image intensity as a function of (x,y) position. The polynomial is then divided into every pixel as a function of position. To preserve dynamic range, Mira automatically promotes the data type to a floating point format.

Example

The following script loads an image from file sPath and divides a 3 x 2 term polynomial into it. A dark defect exists in the region (300:350, 200:300). This is omitted from the fit by specifying the region to a CRect R:

I = CImage:new()	-- create a new CImage
I:Open( sPath )	-- load the image
R = NewRect(300,350,200,300)	-- omit a dark defect from the fit
I:PolyFitDiv(3,2,true,R)	-- perform the operation on image I
I:Display()
I:delete()
R:delete()