Mercurial > hg > orthanc-stone
view Framework/Toolbox/SubpixelReader.h @ 270:2d64f4d39610 am-2
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author | am@osimis.io |
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date | Thu, 23 Aug 2018 14:45:04 +0200 |
parents | 5412adf19980 |
children | b70e9be013e4 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2018 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #pragma once #include "../StoneEnumerations.h" #include "GeometryToolbox.h" #include <Core/Images/ImageTraits.h> #include <boost/noncopyable.hpp> #include <cmath> namespace OrthancStone { namespace Internals { class SubpixelReaderBase : public boost::noncopyable { private: const Orthanc::ImageAccessor& source_; unsigned int width_; unsigned int height_; public: SubpixelReaderBase(const Orthanc::ImageAccessor& source) : source_(source), width_(source.GetWidth()), height_(source.GetHeight()) { } ORTHANC_FORCE_INLINE const Orthanc::ImageAccessor& GetSource() const { return source_; } ORTHANC_FORCE_INLINE unsigned int GetWidth() const { return width_; } ORTHANC_FORCE_INLINE unsigned int GetHeight() const { return height_; } }; } template <Orthanc::PixelFormat Format, ImageInterpolation Interpolation> class SubpixelReader; template <Orthanc::PixelFormat Format> class SubpixelReader<Format, ImageInterpolation_Nearest> : public Internals::SubpixelReaderBase { public: typedef Orthanc::PixelTraits<Format> Traits; typedef typename Traits::PixelType PixelType; SubpixelReader(const Orthanc::ImageAccessor& source) : SubpixelReaderBase(source) { } inline bool GetValue(PixelType& target, float x, float y) const; inline bool GetFloatValue(float& target, float x, float y) const; }; template <Orthanc::PixelFormat Format> class SubpixelReader<Format, ImageInterpolation_Bilinear> : public Internals::SubpixelReaderBase { public: typedef Orthanc::PixelTraits<Format> Traits; typedef typename Traits::PixelType PixelType; SubpixelReader(const Orthanc::ImageAccessor& source) : SubpixelReaderBase(source) { } inline bool GetFloatValue(float& target, float x, float y) const; inline bool GetValue(PixelType& target, float x, float y) const; }; template <Orthanc::PixelFormat Format> bool SubpixelReader<Format, ImageInterpolation_Nearest>::GetValue(PixelType& target, float x, float y) const { if (x < 0 || y < 0) { return false; } else { unsigned int ux = static_cast<unsigned int>(std::floor(x)); unsigned int uy = static_cast<unsigned int>(std::floor(y)); if (ux < GetWidth() && uy < GetHeight()) { Orthanc::ImageTraits<Format>::GetPixel(target, GetSource(), ux, uy); return true; } else { return false; } } } template <Orthanc::PixelFormat Format> bool SubpixelReader<Format, ImageInterpolation_Nearest>::GetFloatValue(float& target, float x, float y) const { PixelType value; if (GetValue(value, x, y)) { target = Traits::PixelToFloat(value); return true; } else { return false; } } template <Orthanc::PixelFormat Format> bool SubpixelReader<Format, ImageInterpolation_Bilinear>::GetValue(PixelType& target, float x, float y) const { float value; if (GetFloatValue(value, x, y)) { Traits::FloatToPixel(target, value); return true; } else { return false; } } template <Orthanc::PixelFormat Format> bool SubpixelReader<Format, ImageInterpolation_Bilinear>::GetFloatValue(float& target, float x, float y) const { x -= 0.5f; y -= 0.5f; if (x < 0 || y < 0) { return false; } else { unsigned int ux = static_cast<unsigned int>(std::floor(x)); unsigned int uy = static_cast<unsigned int>(std::floor(y)); float f00, f01, f10, f11; if (ux < GetWidth() && uy < GetHeight()) { f00 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux, uy); } else { return false; } if (ux + 1 < GetWidth()) { f01 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux + 1, uy); } else { f01 = f00; } if (uy + 1 < GetHeight()) { f10 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux, uy + 1); } else { f10 = f00; } if (ux + 1 < GetWidth() && uy + 1 < GetHeight()) { f11 = Orthanc::ImageTraits<Format>::GetFloatPixel(GetSource(), ux + 1, uy + 1); } else { f11 = f00; } float ax = x - static_cast<float>(ux); float ay = y - static_cast<float>(uy); target = GeometryToolbox::ComputeBilinearInterpolationUnitSquare(ax, ay, f00, f01, f10, f11); return true; } } }