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-- File: Image_PlanarPixelInterpolation.cdl
-- Created: Tue Jul 27 18:47:06 1993
-- Author: Jean Louis FRENKEL
-- <jlf@sparc3>
---Copyright: Matra Datavision 1993
class PlanarPixelInterpolation from Image inherits PixelInterpolation from Image
---Purpose: The class PlanarPixelInterpolation is used to compute a
-- SubPixelvalue on non integer Image coordinate
-- PlanarPixelInterpolation redefined a new method to compute a
-- SubPixel value .
-- To compute the value of a Image SubPixel, first we look
-- for the three nearest Image Pixels .
-- Then we compute the plane definition in the 3D space
-- composed by the Image Pixel coordinate and Pixel value
-- on Z axis .
-- The SubPixel value is the Z value of ( FX,FY ) point in the
-- three nearest Image Pixel defined plane .
uses
Image from Image,
Pixel from Aspect,
ColorPixel from Aspect,
IndexPixel from Aspect,
DColorImage from Image,
DIndexedImage from Image
is
Create returns PlanarPixelInterpolation from Image ;
---Level: Public
---Purpose: Create a PlanarPixelInterpolation object.
Interpolate( me ; aImage : Image from Image ;
X,Y : Real from Standard ;
LowerX,LowerY,UpperX,UpperY : Integer from Standard ;
RetPixel : in out Pixel from Aspect )
returns Boolean from Standard is redefined ;
---Level: Public
---Purpose: Redefined the method to compute SubPixel's value
-- on non integer Image coordinate.
-- LowerX,LowerY,UpperX,UpperY is the Image Min Max, it's used
-- to check if the SubPixel coordinate FX,FY is outside of
-- image.
-- Return True if Interpolation Succes.
-- Return False if the SubPixel is out from Image.
Interpolate( me ; aImage : DColorImage from Image ;
X,Y : Real from Standard ;
LowerX,LowerY,UpperX,UpperY : Integer from Standard ;
RetPixel : in out ColorPixel from Aspect )
returns Boolean from Standard is redefined;
---Level: Public
---Purpose: Compute SubPixel's value on non integer Image coordinate for
-- DColorImage and ColorPixel.
-- LowerX,LowerY,UpperX,UpperY is the Image Min Max, it's used
-- to check if the SubPixel coordinate FX,FY is outside of
-- image.
-- Return True if Interpolation Succes.
-- Return False if the SubPixel is out from Image.
Interpolate( me ; aImage : DIndexedImage from Image ;
X,Y : Real from Standard ;
LowerX,LowerY,UpperX,UpperY : Integer from Standard ;
RetPixel : in out IndexPixel from Aspect )
returns Boolean from Standard is redefined ;
---Level: Public
---Purpose: Compute SubPixel's value on non integer Image coordinate for
-- DIndexedImage and IndexPixel.
-- LowerX,LowerY,UpperX,UpperY is the Image Min Max, it's used
-- to check if the SubPixel coordinate X,Y is outside of
-- image.
-- Return True if Interpolation Succes.
-- Return False if the SubPixel is out from Image.
end PlanarPixelInterpolation from Image;
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