annotate common/src/main/java/digilib/image/DocuImage.java @ 1148:05413c47a976

new parameter showAnnotationNumbers (for rectangles).
author robcast
date Fri, 23 Nov 2012 18:02:52 +0100
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1 /* DocuImage -- General image interface class
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2
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3 Digital Image Library servlet components
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4
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5 Copyright (C) 2001, 2002, 2003 Robert Casties (robcast@mail.berlios.de)
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6
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7 This program is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2 of the License, or (at your
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10 option) any later version.
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11
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12 Please read license.txt for the full details. A copy of the GPL
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13 may be found at http://www.gnu.org/copyleft/lgpl.html
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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04ad64b2137a Servlet version 1.14b1
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 */
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20
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21 package digilib.image;
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22
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23 import java.awt.Rectangle;
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24 import java.io.IOException;
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25 import java.io.OutputStream;
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26 import java.util.Iterator;
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27
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28 import digilib.io.FileOpException;
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29 import digilib.io.ImageInput;
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30 import digilib.util.ImageSize;
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31
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32 /**
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33 * The basic class for the representation of a digilib image.
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34 *
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35 * The actual image object is hidden in the class, only methods for loading,
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36 * manipulation, and saving are exported. This strategy enables implementations
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37 * using different toolkits that rely on different image base classes (like
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38 * JIMI, Java2D and JAI).
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39 */
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40 public interface DocuImage {
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41
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42 /**
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43 * Loads an image file into the Object.
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44 *
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45 * @param ii
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46 * Image File.
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47 * @throws FileOpException
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48 * Exception thrown if any error occurs.
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49 */
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50 public void loadImage(ImageInput ii) throws FileOpException;
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51
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52 /**
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53 * This DocuImage supports the loadSubImage operation.
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54 *
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55 * @return boolean
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56 */
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57 public boolean isSubimageSupported();
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58
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59 /**
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60 * Load only a subsampled region of the image file.
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61 *
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62 * @param ii
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63 * @param region
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64 * @param subsample
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65 * @throws FileOpException
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66 */
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67 public void loadSubimage(ImageInput ii, Rectangle region, int subsample) throws FileOpException;
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68
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69 /**
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70 * Writes the current image to an OutputStream.
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71 *
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72 * The image is encoded to the mime-type <code>mt</code> and sent to the
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73 * output stream <code>ostream</code>.
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74 *
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75 * Currently only mime-types "image/jpeg" and "image/png" are supported.
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76 *
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77 * @param mt
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78 * mime-type of the image to be sent.
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79 * @param ostream
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80 * OutputStream where the image is sent.
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81 * @throws ImageOpException
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82 * Exception in other cases.
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83 * @throws FileOpException
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84 * Exception on sending data
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85 */
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86 public void writeImage(String mt, OutputStream ostream) throws ImageOpException, FileOpException;
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87
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88 /**
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89 * The width of the current image in pixel.
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90 *
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91 * @return Image width in pixels.
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92 */
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93 public int getWidth();
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94
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95 /**
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96 * The height of the current image in pixel.
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97 *
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98 * @return Image height in pixels.
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99 */
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100 public int getHeight();
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101
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102 /**
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103 * The size of the current image in pixel.
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104 *
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105 * @return
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106 */
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107 public ImageSize getSize();
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108
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109 /**
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110 * The mime-type of the image, i.e. the mime-type of the input that was
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111 * read.
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112 *
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113 * @return String the mime-type of this image.
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114 */
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115 public String getMimetype();
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116
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117 /**
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118 * Crops the current image.
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119 *
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120 * Cuts out a region of the size <code>width</code> x <code>height</code> at
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121 * the offset <code>xoff</code>, <code>yoff</code> from the current image
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122 * and replaces the current image with the result.
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123 *
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124 * @param xoff
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125 * X offset of crop region
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126 * @param yoff
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127 * Y offset of crop region
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128 * @param width
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129 * width of crop region
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130 * @param height
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131 * height of crop region
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132 * @throws ImageOpException
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133 */
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134 public void crop(int xoff, int yoff, int width, int height) throws ImageOpException;
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135
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136 /**
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137 * Scales the current image.
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138 *
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139 * Replaces the current image with an image scaled by the factor
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140 * <code>scale</code>.
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141 *
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142 * @param scale
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143 * scaling factor
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144 * @throws ImageOpException
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145 */
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146 public void scale(double scaleX, double scaleY) throws ImageOpException;
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147
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148 /**
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149 * Crops and scales the current image.
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150 *
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151 * The current image is cropped to a rectangle of <code>width</code>,
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152 * <code>height</code> at position <code>x_off</code>, <code>y_off</code>.
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153 * The resulting image is scaled by the factor <code>scale</code> using the
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154 * interpolation quality <code>qual</code> (0=worst).
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155 *
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156 * @param x_off
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157 * x offset of the crop rectangle in pixel.
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158 * @param y_off
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159 * y offset of the crop rectangle in pixel.
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160 * @param width
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161 * width of the crop rectangle in pixel.
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162 * @param height
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163 * height of the crop rectangle in pixel.
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164 * @param scale
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165 * scaling factor.
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166 * @param qual
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167 * interpolation quality (0=worst).
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168 * @throws ImageOpException
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169 * exception thrown on any error.
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170 */
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171 public void cropAndScale(int x_off, int y_off, int width, int height, double scale, int qual) throws ImageOpException;
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172
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173 /**
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174 * Rotates the current image.
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175 *
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176 * Replaces the current image with a rotated image. The image is rotated
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177 * around the center by the <code>angle</code> given in degrees [0, 360]
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178 * clockwise. Image size and aspect ratio are likely to change.
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179 *
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180 * @param angle
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181 * rotation angle in degree
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182 */
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183 public void rotate(double angle) throws ImageOpException;
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184
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185 /**
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186 * Mirrors the current image.
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187 *
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188 * Replaces the current image with a mirrored image. The mirror axis goes
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189 * through the center of the image and is rotated by <code>angle</code>
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190 * degrees. Currently only horizontal and vertical mirroring (0 and 90
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191 * degree) are supported.
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192 *
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193 * @param angle
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194 * angle of mirror axis
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195 * @throws ImageOpException
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196 */
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197 public void mirror(double angle) throws ImageOpException;
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198
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199 /**
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200 * Enhances brightness and contrast of the current image.
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201 *
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202 * Replaces the current image with a brightness and contrast enhanced image.
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203 * Contrast is enhanced by multiplying the pixel value with the constant
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204 * <code>mult</code>. Brightness is enhanced by adding the constant
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205 * <code>add</code> to the pixel value. Operation: p1 = (p0*mult)+add.
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206 *
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207 * @param mult
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208 * multiplicative constant for contrast enhancement
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209 * @param add
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210 * additive constant for brightness enhancement
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211 * @throws ImageOpException
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212 */
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213 public void enhance(float mult, float add) throws ImageOpException;
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214
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215 /**
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216 * Manipulates the colors of the current image.
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217 *
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218 * Replaces the current image with a color modified image. For the red,
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219 * green and blue color channels all pixel values are multiplied by the
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220 * constant <code>m</code> and added to the constant <code>a</code>.
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221 * Operation: p1 = (p0*m)+a.
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222 *
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223 * @param rgbm
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224 * multiplicative constants for red, green, blue
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225 * @param rgba
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226 * additive constant for red, green, blue
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227 * @throws ImageOpException
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228 */
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229 public void enhanceRGB(float[] rgbm, float[] rgba) throws ImageOpException;
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230
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231 /**
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232 * Operations for colorOps.
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233 *
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234 * GRAYSCALE: cast color image to grayscale NTSC_GRAY: convert color image
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235 * to grayscale using NTSC formula INVERT: invert colors (every channel
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236 * separately) MAP_GRAY_BGR: false color image from grayscale (0: blue, 128:
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237 * green, 255: red)
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238 *
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239 */
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240 public enum ColorOp {
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241 GRAYSCALE, NTSC_GRAY, INVERT, MAP_GRAY_BGR
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242 };
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243
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244 /**
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245 * Changes the colors of the current image.
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246 *
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247 * Changes the colors of the current image. Operations are instances of
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248 * ColorOp:
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249 *
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250 * GRAYSCALE: cast color image to grayscale NTSC_GRAY: convert color image
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251 * to grayscale using NTSC formula INVERT: invert colors (every channel
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252 * separately) MAP_GRAY_BGR: false color image from grayscale (0: blue, 128:
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253 * green, 255: red)
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254 *
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255 * @throws ImageOpException
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256 */
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257 public void colorOp(ColorOp op) throws ImageOpException;
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258
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259 /**
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260 * Returns the interpolation quality.
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261 *
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262 * @return int
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263 */
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264 public int getQuality();
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265
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266 /**
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267 * Sets the interpolation quality.
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268 *
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269 * @param quality
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270 * The quality to set
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271 */
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272 public void setQuality(int quality);
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273
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274 /**
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275 * Frees all resources bound to the DocuImage.
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276 *
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277 * Things that should be freed are image objects and open files.
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278 *
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279 */
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280 public void dispose();
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281
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282 /**
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283 * Check image size and type and store in ImageInput ii
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284 */
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285 public ImageInput identify(ImageInput ii) throws IOException;
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286
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287 /**
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288 * Returns a list of supported image formats
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289 */
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290 public Iterator<String> getSupportedFormats();
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291
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292 /**
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293 * returns the underlying image as java.awt.Image (if possible, or null)
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294 *
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295 * @return
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296 */
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297 public java.awt.Image getAwtImage();
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298
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299 /**
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300 * returns the version of the DocuImage implementation.
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301 * @return
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302 */
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303 public String getVersion();
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d76a9e3f1ec9 Servlet version 1.10b
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304
1
0ff3ede32060 Initial revision
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305 }