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Shinya Kitaoka |
810553 |
// #pragma once // could not use by INCLUDE_HPP
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
#ifndef BORDERS_EXTRACTOR_H
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Toshihiro Shimizu |
890ddd |
#define BORDERS_EXTRACTOR_H
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
#include "traster.h"
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Toshihiro Shimizu |
890ddd |
#include "runsmap.h"
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
#include "raster_edge_iterator.h"
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
namespace TRop
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Toshihiro Shimizu |
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{
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Toshihiro Shimizu |
890ddd |
namespace borders
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Toshihiro Shimizu |
890ddd |
{
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//*******************************************************************
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Toshihiro Shimizu |
890ddd |
// Pixel Selector model
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Toshihiro Shimizu |
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//*******************************************************************
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
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/*!
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Toshihiro Shimizu |
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This class is just a stub for pixel selector classes.
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
Pixel Selectors are objects used in raster borders recognition
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Toshihiro Shimizu |
890ddd |
to interpret a raster's pixels and direct edge iterators.
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Toshihiro Shimizu |
890ddd |
\n\n
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Toshihiro Shimizu |
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The main purpose of this class is that of distinguishing pixels
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Toshihiro Shimizu |
890ddd |
from their values <\I>. Values are the actual entities recognized
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Toshihiro Shimizu |
890ddd |
in the borders extraction process - adjacent pixels that are cast to
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Toshihiro Shimizu |
890ddd |
the same value will be included in the same border.
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Toshihiro Shimizu |
890ddd |
\n\n
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Toshihiro Shimizu |
890ddd |
For example, if we want to extract the borders of a fullcolor image
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Toshihiro Shimizu |
890ddd |
that separate bright areas from dark ones, we can just have a pixel selector
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Toshihiro Shimizu |
890ddd |
cast each pixel to the integer value 0 if the pixel's value is below the
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Toshihiro Shimizu |
890ddd |
brigthness threshold, and 1 if above.
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Toshihiro Shimizu |
890ddd |
\n\n
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Toshihiro Shimizu |
890ddd |
Also, pixel selectors tell whether pixels are to be intended as
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Toshihiro Shimizu |
890ddd |
completely transparent (virtual pixels outside the raster boundaries are).
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Toshihiro Shimizu |
890ddd |
*/
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Toshihiro Shimizu |
890ddd |
template <typename pix,="" typename="" val=""></typename>
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Toshihiro Shimizu |
890ddd |
class pixel_selector
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Toshihiro Shimizu |
890ddd |
{
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Toshihiro Shimizu |
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public:
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Toshihiro Shimizu |
890ddd |
typedef Pix pixel_type; //!< The pixel type naming the selector
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Toshihiro Shimizu |
890ddd |
typedef Val value_type; //!< A value type representing pixel contents.
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Toshihiro Shimizu |
890ddd |
//!< Typically the pixel itself.
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
public:
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Toshihiro Shimizu |
890ddd |
value_type value(const pixel_type &pix) const;
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Toshihiro Shimizu |
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bool equal(const pixel_type &a, const pixel_type &b) const
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Toshihiro Shimizu |
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{
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Toshihiro Shimizu |
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return value(a) == value(b);
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Toshihiro Shimizu |
890ddd |
}
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
value_type transparent() const;
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Toshihiro Shimizu |
890ddd |
bool transparent(const pixel_type &pix) const
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Toshihiro Shimizu |
890ddd |
{
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Toshihiro Shimizu |
890ddd |
return value(pix) == transparent();
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Toshihiro Shimizu |
890ddd |
}
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//! Returns whether a border point must be read or not (corners are always read).
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Toshihiro Shimizu |
890ddd |
bool skip(const value_type &prevLeftValue, const value_type &leftValue) const { return true; }
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Toshihiro Shimizu |
890ddd |
};
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//----------------------------------------------------------------------------------
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
enum RunType { _BORDER_LEFT = 0x20,
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Toshihiro Shimizu |
890ddd |
_BORDER_RIGHT = 0x10,
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Toshihiro Shimizu |
890ddd |
_HIERARCHY_INCREASE = 0x8,
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Toshihiro Shimizu |
890ddd |
_HIERARCHY_DECREASE = 0x4 };
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//----------------------------------------------------------------------------------
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
/*!
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Toshihiro Shimizu |
890ddd |
Reads the borders of the input raster, according to the specified selector.
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Toshihiro Shimizu |
890ddd |
Outputs the borders by supplying a container reader with the raster edge iterators
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Toshihiro Shimizu |
890ddd |
corresponding to border vertices. The runsmap used in the process can be
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Toshihiro Shimizu |
890ddd |
returned in output.
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Toshihiro Shimizu |
890ddd |
*/
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Toshihiro Shimizu |
890ddd |
template <typename containerreader="" pixel,="" pixelselector,="" typename=""></typename>
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Toshihiro Shimizu |
890ddd |
void readBorders(const TRasterPT<pixel> &raster, const PixelSelector &selector,</pixel>
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Toshihiro Shimizu |
890ddd |
ContainerReader &reader, RunsMapP *rasterRunsMap = 0);
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//=====================================================================================
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
template <typename containersreader="" mesh,="" pixelselector,="" typename=""></typename>
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Toshihiro Shimizu |
890ddd |
void readMeshes(const TRasterPT<typename pixelselector::pixel_type=""> &raster, const PixelSelector &selector,</typename>
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Toshihiro Shimizu |
890ddd |
ContainersReader &meshesDataReader, RunsMapP *rasterRunsMap = 0);
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Toshihiro Shimizu |
890ddd |
}
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Toshihiro Shimizu |
890ddd |
} //namespace TRop::borders
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
#endif //BORDERS_EXTRACTOR_H
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
//=====================================================================================
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Toshihiro Shimizu |
890ddd |
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Toshihiro Shimizu |
890ddd |
#ifdef INCLUDE_HPP
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Toshihiro Shimizu |
890ddd |
#include "borders_extractor.hpp"
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Toshihiro Shimizu |
890ddd |
#endif //INCLUDE_HPP
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