1<?xml version="1.0" encoding="UTF-8"?> 2<!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" 3 "http://www.docbook.org/xml/4.3/docbookx.dtd"> 4<!-- section history: 5 2017-04-04 elle stone: add convert-to-color-profile.xml 6--> 7<sect2 id="gimp-image-convert-to-color-profile"> 8 <title>Convert to Color Profile</title> 9 10 <indexterm> 11 <primary>Image</primary> 12 <secondary>Color Management</secondary> 13 <tertiary>Convert to Color Profile</tertiary> 14 </indexterm> 15 <indexterm> 16 <primary>Color Management</primary> 17 <secondary>Convert to Color Profile</secondary> 18 </indexterm> 19 <indexterm> 20 <primary>Convert to Color Profile</primary> 21 </indexterm> 22 23 <para> 24 The <guimenuitem>Convert to Color Profile</guimenuitem> allows you to 25 convert an image from its currently assigned ICC profile to another 26 ICC profile. 27 </para> 28 29 <sect3> 30 <title>Activating the command</title> 31 <para> 32 You can access this command from the image menu bar through 33 <menuchoice> 34 <guimenu>Image</guimenu> 35 <guisubmenu>Color Management</guisubmenu> 36 <guimenuitem>Convert to Color Profile</guimenuitem> 37 </menuchoice>. 38 </para> 39 40 </sect3> 41 42 <sect3> 43 <title>Use Notes for <guimenuitem>Convert to Color Profile</guimenuitem></title> 44 <para> 45 In an ICC profile color managed editing application such as GIMP, 46 every image has an assigned ICC color profile that (among other things) 47 tells the Color Management System (in GIMP's case 48 <ulink url="http://www.littlecms.com/">Little CMS</ulink>) what color 49 space to use when sending the image to the screen. 50 </para> 51 <para> 52 Sometimes it's convenient or necessary to convert an image from 53 its currently assigned ICC color profile to another ICC color profile. 54 For example: 55 </para> 56 <orderedlist> 57 <listitem> 58 <para> 59 Perhaps you want to convert the image from some other 60 color space to GIMP's built-in sRGB color space. 61 </para> 62 </listitem> 63 <listitem> 64 <para> 65 Perhaps you want to convert the image to a printer 66 profile before sending it out to a printing establishment. 67 </para> 68 </listitem> 69 <listitem> 70 <para> 71 Perhaps the currently assigned color space is not the 72 right color space for the editing task at hand. 73 </para> 74 </listitem> 75 </orderedlist> 76 </sect3> 77 78 <sect3> 79 <title>An example with screenshots showing how to use 80 <guimenuitem>Convert to Color Profile</guimenuitem></title> 81 82 <para> 83 Let's say you have just finished editing an image. You edited the 84 image in GIMP's built-in sRGB color space and now you want to convert a 85 flattened copy of the image to a printer profile before sending it 86 off to be printed. The screenshots below show the procedure: 87 </para> 88 89 <orderedlist> 90 <listitem> 91 <para> 92 Select <quote>Image/Color Management/Convert to Color Profile</quote> 93 to bring up the 94 <guimenuitem>Convert to ICC Color Profile</guimenuitem> dialog: 95 </para> 96 <mediaobject> 97 <imageobject> 98 <imagedata fileref="images/menus/image/color-management/convert-1.png" format="PNG"/> 99 </imageobject> 100 </mediaobject> 101 </listitem> 102 103 <listitem> 104 <para> 105 Under <guilabel>Current Color Profile</guilabel> is a description 106 of the currently assigned color profile, in this case GIMP's built-in 107 sRGB profile. Clicking on the "+" icon next to the description of the 108 currently assigned profile displays the contents of various information 109 tags in the assigned ICC profile. 110 </para> 111 <para> 112 Clicking on the "+" icons next to the words 113 <guilabel>Profile details</guilabel> displays the contents of various 114 information tags in the ICC profile that you pick as the profile to which 115 the image will be converted. Until you've actually picked a new profile, 116 the profile in the <guilabel>Convert to</guilabel> box defaults to a GIMP 117 built-in sRGB profile. 118 </para> 119 <para> 120 The screenshot below shows example profile descriptions 121 revealed by clicking on the "+" icons: 122 </para> 123 <mediaobject> 124 <imageobject> 125 <imagedata fileref="images/menus/image/color-management/convert-2.png" format="PNG"/> 126 </imageobject> 127 </mediaobject> 128 </listitem> 129 130 <listitem> 131 <para> 132 Between <guilabel>Convert to</guilabel> and 133 <guilabel>Profile details</guilabel> is a drop-down box that allows 134 you to pick a new profile. Clicking in the drop-down box brings up a list 135 of recently used profiles (if any). At the bottom of the list is an option 136 to <guilabel>Select color profile from disk...</guilabel>: 137 </para> 138 <mediaobject> 139 <imageobject> 140 <imagedata fileref="images/menus/image/color-management/convert-3.png" format="PNG"/> 141 </imageobject> 142 </mediaobject> 143 </listitem> 144 145 <listitem> 146 <para> 147 Clicking on <guilabel>Select color profile from disk...</guilabel> 148 brings up the <guimenuitem>Select Destination Profile</guimenuitem> 149 dialog for navigating to the disk location of the profile that you want 150 to select from disk. The box has three panels: 151 </para> 152 <orderedlist> 153 <listitem> 154 <para> 155 The panel on the left allows you to navigate your 156 on-disk folder structure to the folder of your choice. 157 </para> 158 </listitem> 159 <listitem> 160 <para> 161 The center panel initially shows another list of 162 recently used profiles. 163 </para> 164 </listitem> 165 <listitem> 166 <para> 167 If you click on one of the recently used profiles, 168 the right panel will show informational tags that are embedded in 169 the selected profile. 170 </para> 171 </listitem> 172 </orderedlist> 173 <mediaobject> 174 <imageobject> 175 <imagedata fileref="images/menus/image/color-management/convert-4.png" format="PNG"/> 176 </imageobject> 177 </mediaobject> 178 <para> 179 As the desired profile is shown in the list of 180 recently used profiles, the profile can be directly selected from 181 the list of recently used profiles by clicking on the 182 <guilabel>Open</guilabel> button in the lower right corner. Or as shown in 183 the next screenshot,it can be selected by navigating to the profile's 184 location on disk. 185 </para> 186 <note> 187 <para> 188 "Destination profile" is the technical 189 term for the profile to which you want to convert your image. Similarly, 190 "source profile" refers to the current ICC color space (the color 191 space the image is already in, before you convert it to the destination 192 profile). 193 </para> 194 </note> 195 </listitem> 196 197 <listitem> 198 <para> 199 As shown in the screenshot below, the left and center 200 panels of the <guimenuitem>Select Destination Profile</guimenuitem> 201 dialog allow you to navigate to where your ICC profiles are stored on 202 disk, and then pick the desired destination ICC color profile, and the 203 right panel displays informational tags embedded in the selected profile. 204 Click on the <guilabel>Open</guilabel> button to select the 205 "Destination Profile". 206 </para> 207 <mediaobject> 208 <imageobject> 209 <imagedata fileref="images/menus/image/color-management/convert-5.png" format="PNG"/> 210 </imageobject> 211 </mediaobject> 212 </listitem> 213 214 <listitem> 215 <para> 216 Clicking on the <guilabel>Open</guilabel> button 217 returns you to the <guimenuitem>Convert to ICC Color Profile</guimenuitem> 218 dialog, allowing you a chance to either convert to the selected profile or 219 else pick a new profile: 220 </para> 221 <mediaobject> 222 <imageobject> 223 <imagedata fileref="images/menus/image/color-management/convert-6.png" format="PNG"/> 224 </imageobject> 225 </mediaobject> 226 </listitem> 227 228 <listitem> 229 <para> 230 Once you are sure you've picked the right 231 profile, the next step is to select the desired conversion options: 232 </para> 233 <mediaobject> 234 <imageobject> 235 <imagedata fileref="images/menus/image/color-management/convert-7.png" format="PNG"/> 236 </imageobject> 237 </mediaobject> 238 <para> 239 Selecting the desired conversion options requires two decisions: 240 </para> 241 <orderedlist> 242 <listitem> 243 <para> 244 Choose a rendering intent from the 245 <guilabel>Rendering Intent</guilabel> drop-down box. The ICC profile 246 rendering intents are: 247 </para> 248 <itemizedlist> 249 <listitem> 250 <para> 251 <guilabel>Perceptual</guilabel> 252 </para> 253 </listitem> 254 <listitem> 255 <para> 256 <guilabel>Relative Colorimetric</guilabel> 257 </para> 258 </listitem> 259 <listitem> 260 <para> 261 <guilabel>Saturation</guilabel> 262 </para> 263 </listitem> 264 <listitem> 265 <para> 266 <guilabel>Absolute</guilabel> 267 </para> 268 </listitem> 269 </itemizedlist> 270 </listitem> 271 272 <listitem> 273 <para> 274 Decide whether to use black point compensation: 275 </para> 276 <itemizedlist> 277 <listitem> 278 <para> 279 To use black point compensation, the 280 <guilabel>Black Point Compensation</guilabel> box should be 281 checked. 282 </para> 283 </listitem> 284 <listitem> 285 <para> 286 To not use black point compensation, the 287 <guilabel>Black Point Compensation</guilabel> box should be 288 unchecked. 289 </para> 290 </listitem> 291 </itemizedlist> 292 </listitem> 293 </orderedlist> 294 <!--<para> 295 For information about choosing a rendering intent and whether 296 to use black point compensation, see (page not yet written, should go 297 in the Color Management section of the documentation). 298 </para>--> 299 </listitem> 300 301 <listitem> 302 <para> 303 When you've picked the desired conversion options, click 304 on the <guilabel>Convert</guilabel> button in the lower right corner, and the image will be 305 converted to the selected destination profile, in the current example, 306 an RGB printer profile: 307 </para> 308 <mediaobject> 309 <imageobject> 310 <imagedata fileref="images/menus/image/color-management/convert-before-after.png" format="PNG"/> 311 </imageobject> 312 </mediaobject> 313 </listitem> 314 </orderedlist> 315 316 </sect3> 317 318</sect2> 319