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// Copyright (C) 2013 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_DRAW_SURf_POINTS_H_
#define DLIB_DRAW_SURf_POINTS_H_
#include "surf.h"
#include "../gui_widgets.h"
#include "draw_surf_points_abstract.h"
namespace dlib
{
// ----------------------------------------------------------------------------------------
inline void draw_surf_points (
image_window& win,
const std::vector<surf_point>& sp
)
{
for (unsigned long i = 0; i < sp.size(); ++i)
{
const unsigned long radius = static_cast<unsigned long>(sp[i].p.scale*3);
const point center(sp[i].p.center);
point direction = center + point(radius,0);
// SURF descriptors are rotated by sp[i].angle. So we want to include a visual
// indication of this rotation on our overlay.
direction = rotate_point(center, direction, sp[i].angle);
win.add_overlay(image_display::overlay_circle(center, radius, rgb_pixel(0,255,0)));
// Draw a line showing the orientation of the SURF descriptor.
win.add_overlay(center, direction, rgb_pixel(255,0,0));
}
}
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_DRAW_SURf_POINTS_H_
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