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0001 # 0002 msgid "" 0003 msgstr "" 0004 "Project-Id-Version: Digikam Manual 8.0.0\n" 0005 "Report-Msgid-Bugs-To: \n" 0006 "POT-Creation-Date: 2023-12-02 00:35+0000\n" 0007 "PO-Revision-Date: 2023-01-14 18:31+0100\n" 0008 "Last-Translator: KDE Francophone <kde-francophone@kde.org>\n" 0009 "Language-Team: French <kde-francophone@kde.org>\n" 0010 "Language: fr\n" 0011 "MIME-Version: 1.0\n" 0012 "Content-Type: text/plain; charset=UTF-8\n" 0013 "Content-Transfer-Encoding: 8bit\n" 0014 "Plural-Forms: nplurals=2; plural=(n > 1);\n" 0015 0016 #: ../../color_management/monitor_profiles.rst:1 0017 msgid "Color Management and Monitor Profiles" 0018 msgstr "" 0019 0020 #: ../../color_management/monitor_profiles.rst:1 0021 msgid "" 0022 "digiKam, documentation, user manual, photo management, open source, free, " 0023 "learn, easy, image editor, color management, icc, profile, srgb, monitor" 0024 msgstr "" 0025 0026 #: ../../color_management/monitor_profiles.rst:14 0027 msgid "The Monitor Profiles" 0028 msgstr "" 0029 0030 #: ../../color_management/monitor_profiles.rst:17 0031 msgid "sRGB Color space" 0032 msgstr "" 0033 0034 #: ../../color_management/monitor_profiles.rst:19 0035 msgid "" 0036 "sRGB is widely accepted as a standard color profile by virtually everyone " 0037 "involved with consumer-oriented imaging. sRGB was proposed in 1996 by " 0038 "Hewlett Packard and Microsoft as a standardized color space for consumer-" 0039 "oriented applications. As stated in the initial proposal:" 0040 msgstr "" 0041 0042 #: ../../color_management/monitor_profiles.rst:21 0043 msgid "" 0044 "Hewlett-Packard and Microsoft propose the addition of support for a standard " 0045 "color space, sRGB, within the Microsoft operating systems, HP products, the " 0046 "Internet, and all other interested vendors. The aim of this color space is " 0047 "to complement the current color management strategies by enabling a third " 0048 "method of handling color in the operating systems, device drivers and the " 0049 "Internet that utilizes a simple and robust device independent color " 0050 "definition. This will provide good quality and backward compatibility with " 0051 "minimum transmission and system overhead. Based on a calibrated colorimetric " 0052 "RGB color space well suited to Cathode Ray Tube (CRT) monitors, television, " 0053 "scanners, digital cameras, and printing systems, such a space can be " 0054 "supported with minimum cost to software and hardware vendors." 0055 msgstr "" 0056 0057 #: ../../color_management/monitor_profiles.rst:23 0058 msgid "" 0059 "Currently, the ICC (International Color Consortium) tracks and ensures that " 0060 "a color is correctly mapped from the input to the output color space. By " 0061 "attaching a profile for the input color space to the image in question. This " 0062 "is appropriate for high end users. However, there are a broad range of users " 0063 "that do not require this level of flexibility and control. Additionally, " 0064 "most existing file formats do not, and may never support color profile " 0065 "embedding, and finally, there are a broad range of uses [that] actually " 0066 "discourage people from appending any extra data to their files. A common " 0067 "standard RGB color space addresses these issues by merging the many standard " 0068 "and non-standard RGB monitor spaces into a single standard RGB color space. " 0069 "Such a standard could dramatically improve the color fidelity in the desktop " 0070 "environment. For example, if operating system vendors provide support for a " 0071 "standard RGB color space, the input and output device vendors that support " 0072 "this standard color space could easily and confidently communicate color " 0073 "without further color management overhead in the most common situations." 0074 msgstr "" 0075 0076 #: ../../color_management/monitor_profiles.rst:25 0077 msgid "" 0078 "To summarize, the point of the by-now almost universally adopted sRGB color " 0079 "space was and is to make life easier for consumers (no need to worry about " 0080 "color management), less expensive for manufacturers (no need to worry about " 0081 "compatibility between consumer-level digital cameras or scanners, monitors, " 0082 "printers, and so forth), and more convenient for displaying images on the " 0083 "Internet (don't worry about embedding and reading ICC profiles - just assume " 0084 "sRGB)." 0085 msgstr "" 0086 0087 #: ../../color_management/monitor_profiles.rst:27 0088 msgid "" 0089 "So if sRGB works so well and makes life so easy for everyone, why use any " 0090 "other color space and thus be forced to worry about color management issues?" 0091 msgstr "" 0092 0093 #: ../../color_management/monitor_profiles.rst:29 0094 msgid "" 0095 "sRGB was designed to contain colors easily displayed on consumer-oriented " 0096 "monitors and printed by consumer-oriented printers manufactured since 1996. " 0097 "This least-common-denominator set of viewable and printable colors - the " 0098 "technical term is **color gamut** - is much smaller than the set of colors " 0099 "we can see in the real world, much smaller than the set of colors today's " 0100 "digital cameras can capture, much smaller than the set of colors today's " 0101 "printers can print, and much smaller than the color gamut of the new wide " 0102 "gamut monitors that are beginning to enter the consumer market. For anyone " 0103 "who wants to make use of the wider color gamuts available today even at the " 0104 "consumer level, the gamut of sRGB is too small. Conversely, if you don't " 0105 "intend to make use of an expanded gamut of colors at any point in your " 0106 "digital imaging workflow, then you don't need to worry about non-sRGB color " 0107 "spaces and all the attending intricacies of color management." 0108 msgstr "" 0109 0110 #: ../../color_management/monitor_profiles.rst:32 0111 msgid "sRGB Limitations" 0112 msgstr "" 0113 0114 #: ../../color_management/monitor_profiles.rst:34 0115 msgid "" 0116 "A visual representation of the limitations of sRGB compared to the colors we " 0117 "actually see in the real world is presented here after. It shows a two-" 0118 "dimensional representation of all the colors we can see (the horseshoe-" 0119 "shaped region) and the colors contained in the sRGB space (the smaller " 0120 "triangular region)." 0121 msgstr "" 0122 0123 #: ../../color_management/monitor_profiles.rst:40 0124 msgid "" 0125 "The Gamut of D65 sRGB Color Profile Used by Default with Standard LCD Monitor" 0126 msgstr "" 0127 0128 #: ../../color_management/monitor_profiles.rst:43 0129 msgid "Profiling Your Monitor" 0130 msgstr "" 0131 0132 #: ../../color_management/monitor_profiles.rst:45 0133 msgid "" 0134 "If you choose to work exclusively in the sRGB color space, do you need to " 0135 "calibrate your monitor? Whether you stay within the color gamut provided by " 0136 "sRGB or not, you need a properly calibrated monitor because sRGB assumes " 0137 "that your monitor is calibrated to sRGB. Your monitor calibration closes the " 0138 "loop. If you work within the color gamut provided by sRGB then you need to " 0139 "calibrate your monitor to the sRGB standard (or produce and use an accurate " 0140 "monitor profile, or both). What are the consequences of working with an " 0141 "uncalibrated monitor?" 0142 msgstr "" 0143 0144 #: ../../color_management/monitor_profiles.rst:47 0145 msgid "" 0146 "There are several possible consequences, none of them good. Every monitor, " 0147 "calibrated or otherwise, has a native (uncalibrated) white point, expressed " 0148 "as a temperature in degrees Kelvin. The white point of a monitor (calibrated " 0149 "or not) is the color you see when you are looking at a patch of pure white " 0150 "on your screen. Pure white is when the RGB values in your image all equal " 0151 "255 (as expressed in 8-bits), such as the plain white background of a web " 0152 "page or an office document. You are thinking, *white is white* but if you " 0153 "were able to line up several monitors calibrated to different white points, " 0154 "you would see that the higher the temperature of the monitor's white point, " 0155 "the bluer the screen looks in comparison with monitors with lower white " 0156 "points." 0157 msgstr "" 0158 0159 #: ../../color_management/monitor_profiles.rst:49 0160 msgid "" 0161 "If you can find the controls of your own monitor, change the temperature up " 0162 "and down (remembering to put it back to its initial setting when you are " 0163 "done, unless you decide you want a different white point). Your eyes, which " 0164 "adapt quickly to a constant white point, will easily discern the screen " 0165 "getting bluer and yellower as you move the white point higher and lower. If " 0166 "your uncalibrated monitor is too blue (native CRT color temperature is " 0167 "typically 9300K and sRGB assumes 6500K), as you edit your image you will " 0168 "overcompensate and produce images that will look yellowish and too warm on a " 0169 "properly calibrated monitor. Conversely, if your monitor is too yellow " 0170 "because the color temperature is set too low (LCD native color temperature " 0171 "is around 5500K), your images will look blueish/too cool on a properly " 0172 "calibrated monitor." 0173 msgstr "" 0174 0175 #: ../../color_management/monitor_profiles.rst:51 0176 msgid "" 0177 "Setting a proper white point is only part of monitor calibration. You also " 0178 "need a proper black point, brightness (luminance), and gamma (transfer) " 0179 "function. If your monitor is too dark because the black point is set too " 0180 "low, you will overcompensate and produce images that look washed out on a " 0181 "properly calibrated monitor. Conversely, if your monitor black point is set " 0182 "too high, your images will look took dark and overly saturated on a properly " 0183 "calibrated monitor." 0184 msgstr "" 0185 0186 #: ../../color_management/monitor_profiles.rst:53 0187 msgid "" 0188 "If the brightness/contrast is set too high, you will assume your images have " 0189 "a lot more *pop* than they really have when viewed on a properly calibrated " 0190 "monitor, plus your eyes will hurt and your LCD screen will burn out faster." 0191 msgstr "" 0192 0193 #: ../../color_management/monitor_profiles.rst:59 0194 msgid "" 0195 ":kbd:`F12` Shortcut Allows to Turn On/Off the Color Management in Image " 0196 "Editor and all digiKam Thumbnail Views" 0197 msgstr "" 0198 0199 #: ../../color_management/monitor_profiles.rst:61 0200 msgid "" 0201 "If your monitor gamma is improperly set, your tonal variations from dark to " 0202 "light will be off. That is, the shadows or highlights might be overly " 0203 "compressed or expanded, leading you to compensate in the opposite direction. " 0204 "So when viewed on a properly calibrated monitor, the shadows might be too " 0205 "bright or dark (or the highlights too dark or bright), with the rest of the " 0206 "image suffering from tonal over-compression. And heaven help you if the " 0207 "internal R, G, and B guns (or LCD equivalent) of your monitor are improperly " 0208 "set (each gun has its own black point and gain), because the resulting color " 0209 "casts - too green, too magenta, too orange, etc. that you will inevitably " 0210 "create by *correcting* your image during editing - are very obvious when " 0211 "viewed on a properly calibrated monitor." 0212 msgstr "" 0213 0214 #: ../../color_management/monitor_profiles.rst:63 0215 msgid "" 0216 "Whether or not your monitor is properly calibrated, you might be surprised " 0217 "by the results of comparing an image you've edited on your home monitor to " 0218 "the same image as displayed by other monitors in your house or on your " 0219 "friend's and neighbor's monitors. Every image edited on either monitor " 0220 "looked very wrong on the other monitor, until we purchased a " 0221 "spectrophotometer to calibrate and profile both monitors. Unfortunately, at " 0222 "this point neither of these two monitors can be calibrated to display a " 0223 "proper black point, so they are no longer used for image editing - the point " 0224 "being that an additional benefit of using a spectrophotometer is you know " 0225 "when it's time replace your monitor." 0226 msgstr "" 0227 0228 #: ../../color_management/monitor_profiles.rst:65 0229 msgid "" 0230 "The meaning of **black point** and **brightness** seems pretty clear, but " 0231 "what does **gamma** mean? **Gamma compression**, also known as gamma " 0232 "encoding, is used to encode **linear luminance** or RGB values into video " 0233 "signals or digital video file values; **gamma expansion** is the inverse, or " 0234 "decoding, process." 0235 msgstr "" 0236 0237 #: ../../color_management/monitor_profiles.rst:67 0238 msgid "" 0239 "Gamma encoding helps to map data (both analog and digital) into a more " 0240 "perceptually uniform domain. If you wade very deeply into image editing and " 0241 "color management, eventually you will need to make decisions about what " 0242 "gamma (or other encoding/decoding function) you want to use when you " 0243 "calibrate your monitor, profile your digital camera, and choose a working " 0244 "color space. When in doubt (for those of you who just want to know which " 0245 "button to push), gamma=2.2 is a widely-used value, both for monitor " 0246 "calibration and working color spaces." 0247 msgstr "" 0248 0249 #: ../../color_management/monitor_profiles.rst:69 0250 msgid "" 0251 "What's the difference between calibrating a monitor and profiling a monitor? " 0252 "When first learning about color management, many people are confused about " 0253 "the difference between calibrating and profiling a monitor. Calibration is a " 0254 "process where a device is brought into some defined state by making " 0255 "adjustments to its controls or some other physical means. For example, the " 0256 "act of calibrating a monitor involves adjusting its **white point**, **black " 0257 "level**, **luminosity** and **gamma** to predetermined or standard values " 0258 "using the monitor's controls and by altering the video card gamma ramp." 0259 msgstr "" 0260 0261 #: ../../color_management/monitor_profiles.rst:71 0262 msgid "" 0263 "In contrast to calibration, the process of creating a profile is a " 0264 "characterization of the device that does not involve making any changes or " 0265 "adjustments to the device. Rather it is a measurement process that results " 0266 "in a file that contains a precise mathematical description of the device's " 0267 "color and tonality characteristics. This file is an **ICC profile**. These " 0268 "characteristics include the transfer function from the device's color space " 0269 "to a standardized absolute color space (this is called a Profile Color Space " 0270 "in an ICC profile), the device's **white point**, **black point**, " 0271 "**primaries** and other information. Displays are normally characterized " 0272 "(profiled) in their calibrated state." 0273 msgstr "" 0274 0275 #: ../../color_management/monitor_profiles.rst:73 0276 msgid "" 0277 "To summarize, calibration makes changes to the device to alter it's color " 0278 "reproduction characteristics to conform to some predetermined state. " 0279 "Profiling or characterization is a measurement process that results in a " 0280 "detailed description of the device's (normally calibrated) color " 0281 "reproduction characteristics." 0282 msgstr "" 0283 0284 #: ../../color_management/monitor_profiles.rst:75 0285 msgid "" 0286 "Calibrating your monitor technically is not really part of color management. " 0287 "But obviously a properly calibrated and/or profiled monitor is a " 0288 "prerequisite for a color-managed workflow. This manual does not cover the " 0289 "important topics of how to calibrate and profile a monitor. The `Argyll " 0290 "<http://www.argyllcms.com/>`_ documentations are very good and highly " 0291 "recommended reading. To use either of this software to calibrate and/or " 0292 "profile your monitor, you will need a spectrophotometer. A spectrophotometer " 0293 "(sometimes called a *spider*) is a device for measuring the RGB values of " 0294 "color patches projected onto the monitor screen by calibration/profiling " 0295 "software such as Argyll. The Argyll website maintains an up-to-date list of " 0296 "supported spectrophotometers." 0297 msgstr "" 0298 0299 #: ../../color_management/monitor_profiles.rst:78 0300 msgid "Calibrating your Monitor" 0301 msgstr "" 0302 0303 #: ../../color_management/monitor_profiles.rst:80 0304 msgid "" 0305 "There are various methods given on the Internet for calibrating a monitor " 0306 "without using a spectrophotometer. These *eye-ball* methods are better than " 0307 "not calibrating your monitor at all, and depending your eyeball and your " 0308 "monitor, can produce quite usable results. But the eye-ball methods are not " 0309 "a substitute for a properly calibrated and profiled monitor. For the record, " 0310 "calibrating and profiling a monitor with a spectrophotometer, though " 0311 "intimidating at first, is not difficult. Spectrophotometers can be obtained " 0312 "for well under 100€ (if you opt for a more expensive model, make sure you " 0313 "are paying for a better piece of hardware, rather than just a more fully-" 0314 "featured accompanying bit of manufacturer's software that won't run under " 0315 "Linux)." 0316 msgstr "" 0317 0318 #: ../../color_management/monitor_profiles.rst:82 0319 msgid "" 0320 "`Argyll <http://www.argyllcms.com/>`_ documentation will guide you through " 0321 "the process of calibrating and profiling your monitor, without your having " 0322 "to learn very much color management theory. And if/when you learn enough " 0323 "about color management to realize that you want or need a more detailed " 0324 "monitor profile of a particular type, for a particular purpose, these two " 0325 "software have all the advanced capabilities you could possibly hope for." 0326 msgstr "" 0327 0328 #: ../../color_management/monitor_profiles.rst:84 0329 msgid "" 0330 "Assuming you've decided to work exclusively in the sRGB color space, what " 0331 "*digiKam buttons* must be used after a monitor calibration? If your monitor " 0332 "has been calibrated to the sRGB standard and you work exclusively in the " 0333 "sRGB color space, then you can disable color management in digiKam. You " 0334 "don't need to tell digiKam what monitor profile to use because digiKam " 0335 "defaults to using the sRGB color space as the monitor color space profile. " 0336 "And you don't need to tell digiKam to use a color-managed workflow because " 0337 "digiKam defaults to using sRGB for your camera, printer, and working space." 0338 msgstr "" 0339 0340 #: ../../color_management/monitor_profiles.rst:90 0341 msgid "The digiKam Monitor Profile Settings from Color Management Setup Page" 0342 msgstr "" 0343 0344 #: ../../color_management/monitor_profiles.rst:92 0345 msgid "" 0346 "But if you want to take the first steps toward a color-managed workflow, " 0347 "then refer to corresponding page of Settings, enable color management, and " 0348 "select sRGB as your **monitor profile**, your **camera profile**, your " 0349 "**working space** profile, and your **printer profile**. If you've also used " 0350 "`Argyll <http://www.argyllcms.com/>`_ to produce a monitor profile after you " 0351 "calibrated your monitor named :file:`mymonitorprofile.icc`, then tell " 0352 "digiKam to use it instead of sRGB as your monitor profile." 0353 msgstr "" 0354 0355 #: ../../color_management/monitor_profiles.rst:95 0356 msgid "Monitor Profiles Storage" 0357 msgstr "" 0358 0359 #: ../../color_management/monitor_profiles.rst:97 0360 msgid "On **Windows**, the default search paths include:" 0361 msgstr "" 0362 0363 #: ../../color_management/monitor_profiles.rst:99 0364 msgid ":file:`C:\\\\Windows\\\\System32\\\\spool\\\\drivers\\\\color\\\\`" 0365 msgstr "" 0366 0367 #: ../../color_management/monitor_profiles.rst:100 0368 msgid ":file:`C:\\\\Windows\\\\Spool\\\\Drivers\\\\Color\\\\`" 0369 msgstr "" 0370 0371 #: ../../color_management/monitor_profiles.rst:101 0372 msgid ":file:`C:\\\\Windows\\\\Color\\\\`" 0373 msgstr "" 0374 0375 #: ../../color_management/monitor_profiles.rst:103 0376 msgid "On **macOS**, the default search paths include:" 0377 msgstr "" 0378 0379 #: ../../color_management/monitor_profiles.rst:105 0380 msgid ":file:`/System/Library/ColorSync/Profiles/`" 0381 msgstr "" 0382 0383 #: ../../color_management/monitor_profiles.rst:106 0384 msgid ":file:`/Library/ColorSync/Profiles/`" 0385 msgstr "" 0386 0387 #: ../../color_management/monitor_profiles.rst:107 0388 msgid ":file:`~/Library/ColorSync/Profiles/`" 0389 msgstr "" 0390 0391 #: ../../color_management/monitor_profiles.rst:108 0392 msgid ":file:`/opt/local/share/color/icc/`" 0393 msgstr "" 0394 0395 #: ../../color_management/monitor_profiles.rst:109 0396 msgid "" 0397 ":file:`/Applications/digiKam.org/digikam.app/Contents/Resources/digikam/" 0398 "profiles/`" 0399 msgstr "" 0400 0401 #: ../../color_management/monitor_profiles.rst:110 0402 #: ../../color_management/monitor_profiles.rst:118 0403 msgid ":file:`~/.local/share/color/icc/`" 0404 msgstr "" 0405 0406 #: ../../color_management/monitor_profiles.rst:111 0407 #: ../../color_management/monitor_profiles.rst:119 0408 msgid ":file:`~/.local/share/icc/`" 0409 msgstr "" 0410 0411 #: ../../color_management/monitor_profiles.rst:112 0412 #: ../../color_management/monitor_profiles.rst:120 0413 msgid ":file:`~/.color/icc/`" 0414 msgstr "" 0415 0416 #: ../../color_management/monitor_profiles.rst:114 0417 msgid "On **Linux**, the default search paths include:" 0418 msgstr "" 0419 0420 #: ../../color_management/monitor_profiles.rst:116 0421 msgid ":file:`/usr/share/color/icc/`" 0422 msgstr "" 0423 0424 #: ../../color_management/monitor_profiles.rst:117 0425 msgid ":file:`/usr/local/share/color/icc/`" 0426 msgstr "" 0427 0428 #: ../../color_management/monitor_profiles.rst:122 0429 msgid "" 0430 "Under Linux and macOS, your personal ICC profiles are generally located in " 0431 "the :file:`~/local/share/color/icc` folder from your home directory." 0432 msgstr "" 0433 0434 #: ../../color_management/monitor_profiles.rst:128 0435 msgid "" 0436 "digiKam Allows to Setup Customized Places Where you can Store your Personal " 0437 "Color Profile" 0438 msgstr "" 0439 0440 #: ../../color_management/monitor_profiles.rst:131 0441 msgid "Ambient Light and Monitor" 0442 msgstr "" 0443 0444 #: ../../color_management/monitor_profiles.rst:133 0445 msgid "" 0446 "Does the lighting and wall/ceiling/drape/furniture colors near my monitor " 0447 "matter? Good lighting is a prerequisite for proper image editing and for " 0448 "comparing prints to the image on your screen. If the lighting near your " 0449 "workstation is too bright, colors on your monitor look too dark, and " 0450 "conversely. If the light from the fixtures in your workroom have a low CRI " 0451 "(**color rendering index**, meaning you don't have full spectrum bulbs), or " 0452 "if the light in your workroom comes from a window and so varies as the " 0453 "weather and time of day varies (or worse, is filtered through colored " 0454 "drapery), or if the walls and ceiling are creating color casts on your " 0455 "monitor, then your editing process will *correct* color casts that don't " 0456 "really exist." 0457 msgstr "" 0458 0459 #: ../../color_management/monitor_profiles.rst:135 0460 msgid "" 0461 "Best advice, as far as is consistent with maintaining harmony in the family: " 0462 "neutral grey walls and ceiling, cover the windows, wear neutral clothing, " 0463 "set appropriate light levels using appropriate bulbs and fixtures." 0464 msgstr ""