2 * PROJECT: NyARToolkit
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3 * --------------------------------------------------------------------------------
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4 * This work is based on the original ARToolKit developed by
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7 * HITLab, University of Washington, Seattle
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8 * http://www.hitl.washington.edu/artoolkit/
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10 * The NyARToolkit is Java edition ARToolKit class library.
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11 * Copyright (C)2008-2009 Ryo Iizuka
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13 * This program is free software; you can redistribute it and/or
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14 * modify it under the terms of the GNU Lesser General Public License
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15 * as published by the Free Software Foundation; either version 3
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16 * of the License, or (at your option) any later version.
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18 * This program is distributed in the hope that it will be useful,
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19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 * GNU Lesser General Public License for more details
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23 * You should have received a copy of the GNU Lesser General Public
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24 * License along with this program. If not, see <http://www.gnu.org/licenses/>.
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26 * For further information please contact.
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27 * http://nyatla.jp/nyatoolkit/
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28 * <airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>
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31 package jp.nyatla.nyartoolkit.core2.rasterfilter.gs2bin;
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33 import jp.nyatla.nyartoolkit.NyARException;
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34 import jp.nyatla.nyartoolkit.core.raster.*;
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35 import jp.nyatla.nyartoolkit.core.rasterfilter.INyARRasterFilter_GsToBin;
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36 import jp.nyatla.nyartoolkit.core.types.*;
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42 public class NyARRasterFilter_AreaAverage implements INyARRasterFilter_GsToBin
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44 private int _area = 8;
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46 public void doFilter(NyARGrayscaleRaster i_input, NyARBinRaster i_output) throws NyARException
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48 final NyARIntSize size = i_output.getSize();
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49 final int[] out_buf = (int[]) i_output.getBufferReader().getBuffer();
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50 final int[] in_buf = (int[]) i_input.getBufferReader().getBuffer();
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51 assert (i_input.getSize().isEqualSize(i_output.getSize()) == true);
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52 assert (size.h % 8 == 0 && size.w % 8 == 0);//暫定実装なので。
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54 final int area = this._area;
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57 int y2 = size.h - area;
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58 int x2 = size.w - area;
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60 for (int y = y1; y < y2; y++) {
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63 for (int yy = y - area; yy < y + area + 1; yy++) {
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64 for (int xx = x1 - area; xx < x1 + area; xx++) {
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65 sum += in_buf[yy*size.w+xx];
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69 boolean first = true;
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70 for (int x = area; x < x2; x++) {
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72 for (int yy = y - area; yy < y + area; yy++) {
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73 sum += in_buf[yy*size.w+x + area];
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74 sum -= in_buf[yy*size.w+x - area];
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78 int th = (sum / nn);
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80 int g = in_buf[y*size.w+x];
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81 out_buf[y*size.w+x] = th < g ? 1 : 0;
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