001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019/* 020* 021 022Licensed under the Apache License, Version 2.0 (the "License"); 023you may not use this file except in compliance with the License. 024You may obtain a copy of the License at 025 026 http://www.apache.org/licenses/LICENSE-2.0 027 028Unless required by applicable law or agreed to in writing, software 029distributed under the License is distributed on an "AS IS" BASIS, 030WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 031See the License for the specific language governing permissions and 032limitations under the License. 033*/ 034 035package lucee.runtime.img.filter;import java.awt.Rectangle; 036import java.awt.image.BufferedImage; 037 038import lucee.runtime.engine.ThreadLocalPageContext; 039import lucee.runtime.exp.FunctionException; 040import lucee.runtime.exp.PageException; 041import lucee.runtime.img.ImageUtil; 042import lucee.runtime.type.Struct; 043import lucee.runtime.type.util.CollectionUtil; 044 045/** 046 * A filter which performs reduces noise by looking at each pixel's 8 neighbours, and if it's a minimum or maximum, 047 * replacing it by the next minimum or maximum of the neighbours. 048 */ 049public class ReduceNoiseFilter extends WholeImageFilter implements DynFiltering { 050 051 public ReduceNoiseFilter() { 052 } 053 054 private int smooth(int[] v) { 055 int minindex = 0, maxindex = 0, min = Integer.MAX_VALUE, max = Integer.MIN_VALUE; 056 057 for (int i = 0; i < 9; i++) { 058 if ( i != 4 ) { 059 if (v[i] < min) { 060 min = v[i]; 061 minindex = i; 062 } 063 if (v[i] > max) { 064 max = v[i]; 065 maxindex = i; 066 } 067 } 068 } 069 if ( v[4] < min ) 070 return v[minindex]; 071 if ( v[4] > max ) 072 return v[maxindex]; 073 return v[4]; 074 } 075 076 protected int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ) { 077 int index = 0; 078 int[] r = new int[9]; 079 int[] g = new int[9]; 080 int[] b = new int[9]; 081 int[] outPixels = new int[width * height]; 082 083 for (int y = 0; y < height; y++) { 084 for (int x = 0; x < width; x++) { 085 int k = 0; 086 int irgb = inPixels[index]; 087 int ir = (irgb >> 16) & 0xff; 088 int ig = (irgb >> 8) & 0xff; 089 int ib = irgb & 0xff; 090 for (int dy = -1; dy <= 1; dy++) { 091 int iy = y+dy; 092 if (0 <= iy && iy < height) { 093 int ioffset = iy*width; 094 for (int dx = -1; dx <= 1; dx++) { 095 int ix = x+dx; 096 if (0 <= ix && ix < width) { 097 int rgb = inPixels[ioffset+ix]; 098 r[k] = (rgb >> 16) & 0xff; 099 g[k] = (rgb >> 8) & 0xff; 100 b[k] = rgb & 0xff; 101 } else { 102 r[k] = ir; 103 g[k] = ig; 104 b[k] = ib; 105 } 106 k++; 107 } 108 } else { 109 for (int dx = -1; dx <= 1; dx++) { 110 r[k] = ir; 111 g[k] = ig; 112 b[k] = ib; 113 k++; 114 } 115 } 116 } 117 outPixels[index] = (inPixels[index] & 0xff000000) | (smooth(r) << 16) | (smooth(g) << 8) | smooth(b); 118 index++; 119 } 120 } 121 return outPixels; 122 } 123 124 public String toString() { 125 return "Blur/Smooth"; 126 } 127 128 public BufferedImage filter(BufferedImage src, Struct parameters) throws PageException {BufferedImage dst=ImageUtil.createBufferedImage(src); 129 //Object o; 130 131 // check for arguments not supported 132 if(parameters.size()>0) { 133 throw new FunctionException(ThreadLocalPageContext.get(), "ImageFilter", 3, "parameters", "the parameter"+(parameters.size()>1?"s":"")+" ["+CollectionUtil.getKeyList(parameters,", ")+"] "+(parameters.size()>1?"are":"is")+" not allowed, only the following parameters are supported []"); 134 } 135 136 return filter(src, dst); 137 } 138} 139