topical media & game development
student-ar-org-libspark-flartoolkit-core-rasterfilter-rgb2bin-FLARRasterFilter-ARToolkitThreshold.ax
student-ar-org-libspark-flartoolkit-core-rasterfilter-rgb2bin-FLARRasterFilter-ARToolkitThreshold.ax
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/*
* PROJECT: FLARToolKit
* --------------------------------------------------------------------------------
* This work is based on the NyARToolKit developed by
* R.Iizuka (nyatla)
* http://nyatla.jp/nyatoolkit/
*
* The FLARToolKit is ActionScript 3.0 version ARToolkit class library.
* Copyright (C)2008 Saqoosha
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this framework; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For further information please contact.
* http://www.libspark.org/wiki/saqoosha/FLARToolKit
* <saq(at)saqoosha.net>
*
*/
package org.libspark.flartoolkit.core.rasterfilter.rgb2bin {
import org.libspark.flartoolkit.FLARException;
import org.libspark.flartoolkit.core.raster.IFLARRaster;
import org.libspark.flartoolkit.core.raster.rgb.IFLARRgbRaster;
import org.libspark.flartoolkit.core.rasterreader.FLARBufferFormat;
import org.libspark.flartoolkit.core.rasterreader.IFLARBufferReader;
import org.libspark.flartoolkit.core.types.FLARIntSize;
定数閾値による2値化をする。
public class @ax-student-ar-org-libspark-flartoolkit-core-rasterfilter-rgb2bin-FLARRasterFilter-ARToolkitThreshold implements IFLARRasterFilter_RgbToBin {
private var _threshold:int;
public function @ax-student-ar-org-libspark-flartoolkit-core-rasterfilter-rgb2bin-FLARRasterFilter-ARToolkitThreshold(i_threshold:int) {
this._threshold = i_threshold;
}
public function setThreshold(i_threshold:int):void {
this._threshold = i_threshold;
}
public function doFilter(i_input:IFLARRgbRaster, i_output:IFLARRaster):void {
var in_buffer_reader:IFLARBufferReader = i_input.getBufferReader();
var out_buffer_reader:IFLARBufferReader = i_output.getBufferReader();
var in_buf_type:int = in_buffer_reader.getBufferType();
// assert (out_buffer_reader.isEqualBufferType(IFLARBufferReader.BUFFERFORMAT_INT2D_BIN_8));
// assert (checkInputType(in_buf_type)==true);
// assert (i_input.getSize().isEqualSize(i_output.getSize()) == true);
var out_buf:Array = out_buffer_reader.getBuffer() as Array; // int[][]
var in_buf:Array = in_buffer_reader.getBuffer() as Array; // byte[]
var size:FLARIntSize = i_output.getSize();
switch (in_buffer_reader.getBufferType()) {
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_B8G8R8_24:
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_R8G8B8_24:
convert24BitRgb(in_buf, out_buf, size);
break;
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_B8G8R8X8_32:
convert32BitRgbx(in_buf, out_buf, size);
break;
default:
throw new FLARException();
}
return;
}
parameter: i_in byte[]
parameter: i_out int[][]
private function convert24BitRgb(i_in:Array, i_out:Array, i_size:FLARIntSize):void {
const size_w:int = i_size.w;
const x_mod_end:int = size_w - (size_w % 8);
const th:int = this._threshold * 3;
var bp:int = (size_w * i_size.h - 1) * 3;
var w:int;
var x:int;
for (var y:int = i_size.h - 1; y >= 0; y--) {
//端数分
for (x = size_w - 1; x >= x_mod_end;x--) {
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x] = w <= th ? 0 : 1;
bp -= 3;
}
//タイリング
for (; x >= 0; x -= 8) {
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 1] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 2] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 3] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 4] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 5] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 6] = w <= th ? 0 : 1;
bp -= 3;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 7] = w <= th ? 0 : 1;
bp -= 3;
}
}
return;
}
parameter: i_in byte[]
parameter: i_out int[][]
private function convert32BitRgbx(i_in:Array, i_out:Array, i_size:FLARIntSize):void {
const size_w:int = i_size.w;
const x_mod_end:int = size_w - (size_w % 8);
const th:int = this._threshold * 3;
var bp:int = (size_w * i_size.h - 1) * 4;
var w:int;
var x:int;
for (var y:int = i_size.h - 1; y >= 0; y--) {
//端数分
for (x = size_w - 1; x >= x_mod_end;x--) {
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x] = w <= th ? 0 : 1;
bp -= 4;
}
//タイリング
for (; x >= 0; x -= 8) {
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 1] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 2] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 3] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 4] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 5] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 6] = w <= th ? 0 : 1;
bp -= 4;
w = ((i_in[bp] & 0xff) + (i_in[bp + 1] & 0xff) + (i_in[bp + 2] & 0xff));
i_out[y][x - 7] = w <= th ? 0 : 1;
bp -= 4;
}
}
return;
}
private function checkInputType(i_input_type:int):Boolean {
switch(i_input_type) {
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_B8G8R8_24:
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_R8G8B8_24:
case FLARBufferFormat.BUFFERFORMAT_BYTE1D_B8G8R8X8_32:
return true;
default:
return false;
}
}
}
}
(C) Æliens
04/09/2009
You may not copy or print any of this material without explicit permission of the author or the publisher.
In case of other copyright issues, contact the author.
