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ImageFusion
include
itkLabelOverlayFunctor.h
Go to the documentation of this file.
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/*=========================================================================
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*
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* Copyright Insight Software Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0.txt
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*=========================================================================*/
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#ifndef __itkLabelOverlayFunctor_h
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#define __itkLabelOverlayFunctor_h
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#include "
itkLabelToRGBFunctor.h
"
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namespace
itk
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{
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namespace
Functor
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{
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template
<
class
TInputPixel,
class
TLabel,
class
TRGBPixel >
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class
LabelOverlayFunctor
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{
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public
:
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LabelOverlayFunctor
()
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{
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// provide some default value for external use (outside
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// LabelOverlayFunctorImageFilter) Inside LabelOverlayFunctorImageFilter,
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// the values are always initialized
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m_BackgroundValue
=
NumericTraits< TLabel >::Zero
;
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}
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inline
TRGBPixel
operator()
(
const
TInputPixel & p1,
const
TLabel & p2)
const
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{
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TRGBPixel rgbPixel;
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NumericTraits<TRGBPixel>::SetLength
(rgbPixel, 3);
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if
( p2 ==
m_BackgroundValue
)
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{
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// value is background
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// return a gray pixel with the same intensity than the input pixel
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typename
TRGBPixel::ValueType p =
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static_cast<
typename TRGBPixel::ValueType
>
( p1 );
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rgbPixel[0] = p;
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rgbPixel[1] = p;
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rgbPixel[2] = p;
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return
rgbPixel;
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}
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// taint the input pixel with the colored one returned by
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// the color functor.
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TRGBPixel opaque =
m_RGBFunctor
(p2);
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// the following has been unrolled due to a bug with apple's
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// llvm-gcc-4.2 build 5658
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const
double
p1_blend= p1 * ( 1.0 -
m_Opacity
);
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rgbPixel[0] =
static_cast<
typename TRGBPixel::ValueType
>
( opaque[0] *
m_Opacity
+ p1_blend );
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rgbPixel[1] =
static_cast<
typename TRGBPixel::ValueType
>
( opaque[1] *
m_Opacity
+ p1_blend );
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rgbPixel[2] =
static_cast<
typename TRGBPixel::ValueType
>
( opaque[2] *
m_Opacity
+ p1_blend );
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return
rgbPixel;
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}
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bool
operator!=
(
const
LabelOverlayFunctor
& l)
const
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{
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bool
value = l.
m_Opacity
!=
m_Opacity
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||
m_BackgroundValue
!= l.
m_BackgroundValue
;
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return
value;
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}
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~LabelOverlayFunctor
() {}
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void
SetOpacity
(
double
opacity)
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{
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m_Opacity
= opacity;
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}
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void
SetBackgroundValue
(TLabel v)
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{
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m_BackgroundValue
= v;
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m_RGBFunctor
.SetBackgroundValue(v);
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}
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void
ResetColors
()
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{
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m_RGBFunctor
.ResetColors();
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}
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unsigned
int
GetNumberOfColors
()
const
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{
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return
m_RGBFunctor
.GetNumberOfColors();
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}
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typedef
typename
TRGBPixel::ComponentType
ComponentType
;
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void
AddColor
(
ComponentType
r,
ComponentType
g,
ComponentType
b)
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{
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m_RGBFunctor
.AddColor(r, g, b);
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}
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protected
:
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private
:
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double
m_Opacity
;
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TLabel
m_BackgroundValue
;
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typename
Functor::LabelToRGBFunctor< TLabel, TRGBPixel >
m_RGBFunctor
;
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};
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}
// end namespace functor
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}
// end namespace itk
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#endif
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