ProcessedImage.h

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#ifndef _SEFRAMEWORK_IMAGE_PROCESSEDIMAGE_H_
#define _SEFRAMEWORK_IMAGE_PROCESSEDIMAGE_H_
 
#include <memory>
 
#include "SEFramework/Image/Image.h"
#include "SEFramework/Image/ConstantImage.h"
#include "SEFramework/Image/VectorImage.h"
 
namespace SourceXtractor {

 
template <typename T, typename P>
class ProcessedImage : public Image<T> {
 
protected:
 
  ProcessedImage(std::shared_ptr<const Image<T>> image_a, std::shared_ptr<const Image<T>> image_b)
      : m_image_a(image_a), m_image_b(image_b) {
    assert(m_image_a->getWidth() == m_image_b->getWidth());
    assert(m_image_a->getHeight() == m_image_b->getHeight());
  };
 
public:

  virtual ~ProcessedImage() = default;
 
  static std::shared_ptr<ProcessedImage<T, P>> create(
      std::shared_ptr<const Image<T>> image_a, std::shared_ptr<const Image<T>> image_b) {
    return std::shared_ptr<ProcessedImage<T, P>>(new ProcessedImage<T, P>(image_a, image_b));
  }
 
  static std::shared_ptr<ProcessedImage<T, P>> create(std::shared_ptr<const Image<T>> image_a, T value) {
    return std::shared_ptr<ProcessedImage<T, P>>(new ProcessedImage<T, P>(
        image_a, ConstantImage<T>::create(image_a->getWidth(), image_a->getHeight(), value)));
  }
 
  std::string getRepr() const override {
    return "ProcessedImage(" + m_image_a->getRepr() + "," + m_image_b->getRepr() + ")";
  }
 
  int getWidth() const override {
    return m_image_a->getWidth();
  }
 
  int getHeight() const override {
    return m_image_a->getHeight();
  }
 
  std::shared_ptr<ImageChunk<T>> getChunk(int x, int y, int width, int height) const override {
    std::vector<T> new_chunk_data(width * height);
    auto a_chunk = m_image_a->getChunk(x, y, width, height);
    auto b_chunk = m_image_b->getChunk(x, y, width, height);
    for (int iy = 0; iy < height; ++iy) {
      for (int ix = 0; ix < width; ++ix) {
        new_chunk_data[ix + iy * width] = P::process(a_chunk->getValue(ix, iy),
                                                     b_chunk->getValue(ix, iy));
      }
    }
    return UniversalImageChunk<T>::create(std::move(new_chunk_data), width, height);
  }
 
private:
  std::shared_ptr<const Image<T>> m_image_a;
  std::shared_ptr<const Image<T>> m_image_b;
 
}; /* End of ProcessedImage class */
 
 
template<typename T>
struct SubtractOperation
{
  static T process(const T& a, const T& b) { return a - b; }
};
 
template<typename T>
using SubtractImage = ProcessedImage<T, SubtractOperation<T>> ;
 
template<typename T>
struct MultiplyOperation
{
  static T process(const T& a, const T& b) { return a * b; }
};
 
template<typename T>
using MultiplyImage = ProcessedImage<T, MultiplyOperation<T>> ;
 
template<typename T>
struct SnrOperation
{
  static T process(const T& a, const T& b) { return a / sqrt(b); }
};
 
template<typename T>
using SnrImage = ProcessedImage<T, SnrOperation<T>> ;
 
} /* namespace SourceXtractor */
 
 
 
 
#endif /* _SEFRAMEWORK_IMAGE_PROCESSEDIMAGE_H_ */