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/***********************************************************************
FONCTION :
----------
Fichier Image_BilinearPixelInterpolation.cxx :
HISTORIQUE DES MODIFICATIONS :
--------------------------------
-------- : BBL ; Creation
31-12-97 : CAL ; Retrait de la dependance avec math. Calcul developpe.
************************************************************************/
/*----------------------------------------------------------------------*/
/*
* Constantes
*/
#ifdef TRACE
static int Verbose = 0 ;
#endif
/*----------------------------------------------------------------------*/
/*
* Includes
*/
#include <Aspect.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColStd_Array2OfReal.hxx>
#include <Image_BilinearPixelInterpolation.ixx>
Image_BilinearPixelInterpolation::Image_BilinearPixelInterpolation() {}
Standard_Boolean Image_BilinearPixelInterpolation::Interpolate(
const Handle(Image_Image)& aImage,
const Standard_Real FX, const Standard_Real FY,
const Standard_Integer LowX,
const Standard_Integer LowY,
const Standard_Integer UpX,
const Standard_Integer UpY,
Aspect_Pixel& aPixel ) const
{
if ( aImage->IsKind(STANDARD_TYPE(Image_DIndexedImage))) {
return Interpolate( Handle(Image_DIndexedImage)::DownCast( aImage ),
FX,FY,LowX,LowY,UpX,UpY,(Aspect_IndexPixel &)aPixel ) ;
}
else if ( aImage->IsKind(STANDARD_TYPE(Image_DColorImage))) {
return Interpolate( Handle(Image_DColorImage)::DownCast( aImage ),
FX,FY,LowX,LowY,UpX,UpY,(Aspect_ColorPixel &)aPixel ) ;
}
else {
return Image_PixelInterpolation::Interpolate( aImage,
FX,FY,LowX,LowY,UpX,UpY,aPixel ) ;
}
}
static Standard_Real DoInterpolation( const TColStd_Array1OfReal& NXF,
const TColStd_Array1OfReal& NYF,
const TColStd_Array1OfReal& NZF,
const Standard_Real FX,
const Standard_Real FY )
{ Standard_Real Result ;
if ( NZF(1) == NZF(2) && NZF(2) == NZF(3) ) {
Result = NZF(1) ;
}
else {
Standard_Integer i;
TColStd_Array1OfReal V(1,4), R(1,4) ;
TColStd_Array2OfReal M( 1, 4, 1, 4 ) ;
TColStd_Array2OfReal MINV( 1, 4, 1, 4 ) ;
for ( i = 1 ; i <= 4 ; i++ ) {
M(i,1) = NXF(i) ; M( i,2 ) = NYF(i) ; M( i,3 ) = NXF(i)*NYF(i) ;
M(i,4) = 1. ;
V(i) = NZF(i) ;
}
Aspect::Inverse (M, MINV);
// R = M * V ;
R (1) = M (1, 1) * V (1) + M (1, 2) * V (2)
+ M (1, 3) * V (3) + M (1, 4) * V (4);
R (2) = M (2, 1) * V (1) + M (2, 2) * V (2)
+ M (2, 3) * V (3) + M (2, 4) * V (4);
R (3) = M (3, 1) * V (1) + M (3, 2) * V (2)
+ M (3, 3) * V (3) + M (3, 4) * V (4);
R (4) = M (4, 1) * V (1) + M (4, 2) * V (2)
+ M (4, 3) * V (3) + M (4, 4) * V (4);
Result = R(1)*FX + R(2)*FY + R(3)*FX*FY + R(4) ;
}
return Result ;
}
Standard_Boolean Image_BilinearPixelInterpolation::Interpolate(
const Handle(Image_DColorImage)& aImage,
const Standard_Real FX, const Standard_Real FY,
const Standard_Integer LowX,
const Standard_Integer LowY,
const Standard_Integer UpX,
const Standard_Integer UpY,
Aspect_ColorPixel& aPixel) const
{ Standard_Integer NX = Standard_Integer(FX) ;
Standard_Integer NY = Standard_Integer(FY) ;
Standard_Integer X,Y ;
TColStd_Array1OfReal NXF(1,4), NYF(1,4), NZFR(1,4), NZFG(1,4), NZFB(1,4);
if ( NX < ( LowX-1 ) || NX > UpX ||
NY < ( LowY-1 ) || NY > UpY ) {
return Standard_False ;
}
else {
if ( FX < 0. ) NX-- ;
if ( FY < 0. ) NY-- ;
// (0,0)
X = NX ; Y = NY ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(1) = Standard_Real( X ) ;
NYF(1) = Standard_Real( Y ) ;
NZFR(1) = aImage->Pixel( X, Y ).Value().Red() ;
NZFG(1) = aImage->Pixel( X, Y ).Value().Green() ;
NZFB(1) = aImage->Pixel( X, Y ).Value().Blue() ;
}
else {
return Standard_False ;
}
// (1,0)
X = NX+1 ; Y = NY ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(2) = Standard_Real( X ) ;
NYF(2) = Standard_Real( Y ) ;
NZFR(2) = aImage->Pixel( X, Y ).Value().Red() ;
NZFG(2) = aImage->Pixel( X, Y ).Value().Green() ;
NZFB(2) = aImage->Pixel( X, Y ).Value().Blue() ;
}
else {
return Standard_False ;
}
// (0,1)
X = NX ; Y = NY+1 ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(3) = Standard_Real( X ) ;
NYF(3) = Standard_Real( Y ) ;
NZFR(3) = aImage->Pixel( X, Y ).Value().Red() ;
NZFG(3) = aImage->Pixel( X, Y ).Value().Green() ;
NZFB(3) = aImage->Pixel( X, Y ).Value().Blue() ;
}
else {
return Standard_False ;
}
// (1,1)
X = NX+1 ; Y = NY+1 ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(4) = Standard_Real( X ) ;
NYF(4) = Standard_Real( Y ) ;
NZFR(4) = aImage->Pixel( X, Y ).Value().Red() ;
NZFG(4) = aImage->Pixel( X, Y ).Value().Green() ;
NZFB(4) = aImage->Pixel( X, Y ).Value().Blue() ;
}
else {
return Standard_False ;
}
// Result
Quantity_Color Res;
Standard_Real R,G,B ;
R = DoInterpolation(NXF,NYF,NZFR,FX,FY );
G = DoInterpolation(NXF,NYF,NZFG,FX,FY );
B = DoInterpolation(NXF,NYF,NZFB,FX,FY );
// Some times we get number like -0.3412341234e-14
#ifdef TRACE
if ( Verbose )
if ( R < 0. || R > 1. || G < 0. || G > 1. || B < 0. || B > 1. ) {
cout << "\tError in BilinearPixelInterpolation " <<
R << " " << G << " " << B << endl << flush ;
}
#endif
if ( R < 0. && R > -0.000001 ) R = 0. ;
if ( G < 0. && G > -0.000001 ) G = 0. ;
if ( B < 0. && B > -0.000001 ) B = 0. ;
Res.SetValues( R,G,B, Quantity_TOC_RGB ) ;
aPixel.SetValue( Res );
return Standard_True ;
}
}
Standard_Boolean Image_BilinearPixelInterpolation::Interpolate(
const Handle(Image_DIndexedImage)& aImage,
const Standard_Real FX, const Standard_Real FY,
const Standard_Integer LowX,
const Standard_Integer LowY,
const Standard_Integer UpX,
const Standard_Integer UpY,
Aspect_IndexPixel& aPixel) const
{ Standard_Integer NX = Standard_Integer(FX) ;
Standard_Integer NY = Standard_Integer(FY) ;
Standard_Integer X,Y ;
TColStd_Array1OfReal NXF(1,4), NYF(1,4), NZF(1,4);
if ( NX < ( LowX-1 ) || NX > UpX ||
NY < ( LowY-1 ) || NY > UpY ) {
return Standard_False ;
}
else {
if ( FX < 0. ) NX-- ;
if ( FY < 0. ) NY-- ;
// (0,0)
X = NX ; Y = NY ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(1) = Standard_Real( X ) ;
NYF(1) = Standard_Real( Y ) ;
NZF(1) = Standard_Real( aImage->Pixel( X, Y ).Value() ) ;
}
else {
return Standard_False ;
}
// (1,0)
X = NX+1 ; Y = NY ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(2) = Standard_Real( X ) ;
NYF(2) = Standard_Real( Y ) ;
NZF(2) = Standard_Real( aImage->Pixel( X, Y ).Value() ) ;
}
else {
return Standard_False ;
}
// (0,1)
X = NX ; Y = NY+1 ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(3) = Standard_Real( X ) ;
NYF(3) = Standard_Real( Y ) ;
NZF(3) = Standard_Real( aImage->Pixel( X, Y ).Value() ) ;
}
else {
return Standard_False ;
}
// (1,1)
X = NX+1 ; Y = NY+1 ;
if ( !( X < LowX || X > UpX ||
Y < LowY || Y > UpY ) ) {
NXF(4) = Standard_Real( X ) ;
NYF(4) = Standard_Real( Y ) ;
NZF(4) = Standard_Real( aImage->Pixel( X, Y ).Value() ) ;
}
else {
return Standard_False ;
}
// Result
aPixel.SetValue( Standard_Integer(DoInterpolation(NXF,NYF,NZF,FX,FY )));
return Standard_True ;
}
}
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