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C++ DstView::row_begin方法代码示例

本文整理汇总了C++中DstView::row_begin方法的典型用法代码示例。如果您正苦于以下问题：C++ DstView::row_begin方法的具体用法？C++ DstView::row_begin怎么用？C++ DstView::row_begin使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DstView的用法示例。


在下文中一共展示了DstView::row_begin方法的12个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: sobel_xy

void sobel_xy(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    int max_x = src.width() - 1;
    int width = src.width();
    for (int y=1; y<src.height()-1; ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=1; x < max_x; ++x) {
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	dst_channel_t srcPlus1 = src_it[x+width][c]; //TODO should be replaced by line length
            	dst_channel_t srcMinus1 = src_it[x-width][c];
            	dst_channel_t sobelY = (srcPlus1 > srcMinus1) ?
            			srcPlus1 - srcMinus1 :
						srcMinus1 - srcPlus1;
            	srcPlus1 = src_it[x+1][c];
            	srcMinus1 = src_it[x-1][c];
            	dst_channel_t sobelX = (srcPlus1 > srcMinus1) ?
            			srcPlus1 - srcMinus1 :
						srcMinus1 - srcPlus1;
            	dst_it[x][c] = max(sobelX, sobelY);
            }
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:26，代码来源:GILOperation.cpp

示例2: blur

void blur(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    int max_x = src.width() - 1;
    int width = src.width();
    for (int y=1; y<src.height()-1; ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=1; x < max_x; ++x) {
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	dst_it[x][c] =
            		src_it[x-1-width][c] / 16 +
            		src_it[x-width][c] / 8 +
            		src_it[x-1-width][c] / 16 +

            		src_it[x-1][c] / 8 +
            		src_it[x][c] / 4 +
            		src_it[x-1][c] / 8 +

            		src_it[x-1+width][c] / 16 +
            		src_it[x+width][c] / 8 +
            		src_it[x-1+width][c] / 16;
            }
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:27，代码来源:GILOperation.cpp

示例3: runtime_error

inline void boost::gil::rescale_cols(const SrcView& src, const DstView& dst, const Filter& filter)
{
  typedef typename SrcView::value_type src_pixel_t;
  typedef typename gil::detail::create_accum_pixel_type<src_pixel_t>::type accum_pixel_t;

  if (src.height() != dst.height())
  {
    throw std::runtime_error("rescale_cols: height of source and destination views must match");
  }

  detail::weight_table weights;
  weights.reset(filter, src.width(), dst.width());

  detail::weight_table::const_iterator const table_begin = weights.begin();
  detail::weight_table::const_iterator const table_end   = weights.end();

  typedef typename DstView::coord_t coord_t;
  coord_t const height = dst.height();

  for (coord_t y=0; y<height; y++)
  {
    detail::rescale_line<accum_pixel_t>(
        src.row_begin(y)
      , dst.row_begin(y)
      , table_begin
      , table_end
      );
  }
}
开发者ID:apextw，项目名称:Ramen，代码行数:29，代码来源:rescale.hpp

示例4: resample_pixels

void resample_pixels(const SrcView& src_view, const DstView& dst_view, const MapFn& dst_to_src, Sampler sampler=Sampler()) {
    typename DstView::point_t dst_dims=dst_view.dimensions();
    typename DstView::point_t dst_p;
    //typename mapping_traits<MapFn>::result_type src_p;

    for (dst_p.y=0; dst_p.y<dst_dims.y; ++dst_p.y) {
        typename DstView::x_iterator xit = dst_view.row_begin(dst_p.y);
        for (dst_p.x=0; dst_p.x<dst_dims.x; ++dst_p.x) {
            sample(sampler, src_view, transform(dst_to_src, dst_p), xit[dst_p.x]);
        }
    }
}
开发者ID:morphimac，项目名称:TuttleOFX，代码行数:12，代码来源:resample.hpp

示例5: x_gradient

void x_gradient(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    for (int y=0; y<src.height(); ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=1; x<src.width()-1; ++x)
            static_transform(src_it[x-1], src_it[x+1], dst_it[x], 
                               halfdiff_cast_channels<dst_channel_t>());
    }
}
开发者ID:aubonbeurre，项目名称:abbsandbox，代码行数:12，代码来源:imaging_utils.hpp

示例6: 

inline void boost::gil::rescale(const SrcView& src, const DstView& dst, const Filter& filter)
{
  typedef typename SrcView::value_type src_pixel_t;
  typedef typename gil::detail::create_accum_pixel_type<src_pixel_t>::type accum_pixel_t;

  // construct weights tables

  detail::weight_table horizontal_weights;
  horizontal_weights.reset(filter, src.width(), dst.width());

  detail::weight_table vertical_weights;
  vertical_weights.reset(filter, src.height(), dst.height());

  // allocate intermediary pixels row

  std::vector<accum_pixel_t> intermediate_row( src.width() );

  typedef typename DstView::coord_t coord_t;
  coord_t const src_width  = src.width();
  coord_t const dst_height = dst.height();

  for (coord_t y=0; y<dst_height; y++)
  {
    // create the intermediate row by vertically sampling the source image pixels

    detail::weight_table::const_iterator const vtable_begin = vertical_weights.begin() + y;
    detail::weight_table::const_iterator const vtable_end   = vtable_begin + 1;

    for (coord_t x=0; x<src_width; x++)
    {
      detail::rescale_line<accum_pixel_t>(
          src.col_begin(x)
        , intermediate_row.begin() + x
        , vtable_begin
        , vtable_end
        );
    }

    // scale horizontally the intermediate row into the destination row

    detail::weight_table::const_iterator const htable_begin = horizontal_weights.begin();
    detail::weight_table::const_iterator const htable_end   = horizontal_weights.end();

    detail::rescale_line<accum_pixel_t>(
        intermediate_row.begin()
      , dst.row_begin(y)
      , htable_begin
      , htable_end
      );
  }
}
开发者ID:apextw，项目名称:Ramen，代码行数:51，代码来源:rescale.hpp

示例7: x_gradient

void x_gradient(const SrcView& src, const DstView& dst) {

    int max_x = src.width()-1;
    for (int y=0; y<src.height(); ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=1; x < max_x; ++x) {
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	dst_it[x][c] = (src_it[x+1][c] - src_it[x-1][c])/2;
            }
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:14，代码来源:GILOperation.cpp

示例8: grayToRgbView

void grayToRgbView(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    int width = src.width();
    for (int y=0; y< src.height(); ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=0; x < width; ++x) {
        	dst_channel_t grayValue = (dst_channel_t) src_it[x];
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	dst_it[x][c] = grayValue;
            }
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:16，代码来源:GILOperation.cpp

示例9: rgbToGrayView

void rgbToGrayView(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    int width = src.width();
    for (int y=0; y< src.height(); ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=0; x < width; ++x) {
        	int combination = 0;
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	combination += src_it[x][c] * RGB_TO_GRAY_INT[c];
            }
        	dst_it[x] = (dst_channel_t) (combination / 100);
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:17，代码来源:GILOperation.cpp

示例10: view_multiplies_scalar

inline void view_multiplies_scalar(const SrcView& src,const Scalar& scalar,const DstView& dst) {
    BOOST_ASSERT(src.dimensions() == dst.dimensions());
    using PIXEL_SRC_REF = typename pixel_proxy<typename SrcView::value_type>::type;
    using PIXEL_DST_REF = typename pixel_proxy<typename DstView::value_type>::type;
    int height=src.height();
    for(int rr=0;rr<height;++rr) {
        typename SrcView::x_iterator it_src=src.row_begin(rr);
        typename DstView::x_iterator it_dst=dst.row_begin(rr);
        typename SrcView::x_iterator it_src_end=src.row_end(rr);
        while(it_src!=it_src_end) {
            pixel_assigns_t<PixelAccum,PIXEL_DST_REF>()(
                pixel_multiplies_scalar_t<PIXEL_SRC_REF,Scalar,PixelAccum>()(*it_src,scalar),
                *it_dst);
            ++it_src; ++it_dst;
        }
    }
}
开发者ID:boostorg，项目名称:gil，代码行数:17，代码来源:algorithm.hpp

示例11: sobel_x

void sobel_x(const SrcView& src, const DstView& dst) {
    typedef typename channel_type<DstView>::type dst_channel_t;

    int max_x = src.width()-1;
    for (int y=0; y<src.height(); ++y) {
        typename SrcView::x_iterator src_it = src.row_begin(y);
        typename DstView::x_iterator dst_it = dst.row_begin(y);

        for (int x=1; x < max_x; ++x) {
            for (int c=0; c< num_channels<rgb8_view_t>::value; ++c) {
            	dst_channel_t srcPlus1 = src_it[x+1][c];
            	dst_channel_t srcMinus1 = src_it[x-1][c];
            	dst_it[x][c] = (srcPlus1 > srcMinus1) ?
            			srcPlus1 - srcMinus1 :
						srcMinus1 - srcPlus1;
            }
        }
    }
}
开发者ID:sanyaade-g2g-repos，项目名称:shapelogic-cpp，代码行数:19，代码来源:GILOperation.cpp

示例12: resample_pixels_progress

// Models MappingFunctionConcept
void resample_pixels_progress( const SrcView& src_view, const DstView& dst_view, const MapFn& dst_to_src, const OfxRectI& procWindow, tuttle::plugin::IProgress* p, Sampler sampler = Sampler() )
{
	typename DstView::point_t dst_p;
	typename DstView::value_type black;
	color_convert( boost::gil::rgba32f_pixel_t( 0.0, 0.0, 0.0, 0.0 ), black );
	for( dst_p.y = procWindow.y1; dst_p.y < procWindow.y2; ++dst_p.y )
	{
		typename DstView::x_iterator xit = dst_view.row_begin( dst_p.y );
		for( dst_p.x = procWindow.x1; dst_p.x < procWindow.x2; ++dst_p.x )
		{
			if( !boost::gil::sample( sampler, src_view, transform( dst_to_src, dst_p ), xit[dst_p.x] ) )
			{
				xit[dst_p.x] = black; // if it is outside of the source image
			}
		}
		if( p->progressForward() )
			return;
	}
}
开发者ID:morphimac，项目名称:TuttleOFX，代码行数:20，代码来源:resample.hpp


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