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0001 # Lithuanian translations for Digikam Manual package.
0002 # Copyright (C) licensed under the  <a href="https://spdx.org/licenses/GFDL-1.2-or-later.html">licensed under the terms of the GNU Free Documentation License 1.2+</a> unless stated otherwise
0003 # This file is distributed under the same license as the Digikam Manual package.
0004 # Automatically generated, 2023.
0005 #
0006 msgid ""
0007 msgstr ""
0008 "Project-Id-Version: Digikam Manual 8.0.0\n"
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0011 "PO-Revision-Date: 2023-01-30 00:50+0000\n"
0012 "Last-Translator: Automatically generated\n"
0013 "Language-Team: none\n"
0014 "Language: lt\n"
0015 "MIME-Version: 1.0\n"
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0017 "Content-Transfer-Encoding: 8bit\n"
0018 "Plural-Forms: nplurals=4; plural=(n==1 ? 0 : n%10>=2 && (n%100<10 || n"
0019 "%100>=20) ? 1 : n%10==0 || (n%100>10 && n%100<20) ? 2 : 3);\n"
0020 
0021 #: ../../color_management/basis_knowledge.rst:1
0022 msgid "Basis Knowledge about Color Management"
0023 msgstr ""
0024 
0025 #: ../../color_management/basis_knowledge.rst:1
0026 msgid ""
0027 "digiKam, documentation, user manual, photo management, open source, free, "
0028 "learn, easy, image editor, color management, icc, profile, basis"
0029 msgstr ""
0030 
0031 #: ../../color_management/basis_knowledge.rst:14
0032 msgid "Basis Knowledge"
0033 msgstr ""
0034 
0035 #: ../../color_management/basis_knowledge.rst:16
0036 msgid "Contents"
0037 msgstr ""
0038 
0039 #: ../../color_management/basis_knowledge.rst:19
0040 msgid "Overview"
0041 msgstr ""
0042 
0043 #: ../../color_management/basis_knowledge.rst:21
0044 msgid ""
0045 "The point of a color-managed workflow is to ensure that the colors coming "
0046 "from your camera or scanner have a predictable relationship with the colors "
0047 "you actually photographed or scanned, that the colors displayed on your "
0048 "monitor match the colors coming from your camera or scanner, and that the "
0049 "colors you print or display on the web match the colors you produced in your "
0050 "digital darkroom."
0051 msgstr ""
0052 
0053 #: ../../color_management/basis_knowledge.rst:27
0054 msgid ""
0055 "The Overall Scheme of Color Spaces Used in a Color Managed Application as "
0056 "digiKam"
0057 msgstr ""
0058 
0059 #: ../../color_management/basis_knowledge.rst:29
0060 msgid ""
0061 "When it comes to color management, everyone wants to know, *which buttons to "
0062 "push to get the wanted results*. Unfortunately, color management of "
0063 "necessity involves making informed choices at every step along the image-"
0064 "processing workflow. The purpose of this section is to provide sufficient "
0065 "background information on color management, along with links to more in-"
0066 "depth information, to enable you to begin to make your own informed "
0067 "decisions, based on your own desired results."
0068 msgstr ""
0069 
0070 #: ../../color_management/basis_knowledge.rst:32
0071 msgid "Unrelevant Use-Cases"
0072 msgstr ""
0073 
0074 #: ../../color_management/basis_knowledge.rst:34
0075 msgid ""
0076 "If your imaging workflow meets all six criteria listed below, then you don't "
0077 "need to worry about color management:"
0078 msgstr ""
0079 
0080 #: ../../color_management/basis_knowledge.rst:36
0081 msgid ""
0082 "You are working at a monitor properly calibrated to the sRGB color space "
0083 "(more about int :ref:`this section <monitor_profiles>` of this manual)."
0084 msgstr ""
0085 
0086 #: ../../color_management/basis_knowledge.rst:38
0087 msgid ""
0088 "Your imaging workflow starts with an in-camera-produced JPEG already in the "
0089 "sRGB color space."
0090 msgstr ""
0091 
0092 #: ../../color_management/basis_knowledge.rst:40
0093 msgid "You work exclusively in the sRGB color space for editing."
0094 msgstr ""
0095 
0096 #: ../../color_management/basis_knowledge.rst:42
0097 msgid "Your printer wants images in the sRGB color space."
0098 msgstr ""
0099 
0100 #: ../../color_management/basis_knowledge.rst:44
0101 msgid "Your scanner produces images in the sRGB color space."
0102 msgstr ""
0103 
0104 #: ../../color_management/basis_knowledge.rst:46
0105 msgid ""
0106 "Your only other image output is via email or the web, where sRGB is the de "
0107 "facto standard."
0108 msgstr ""
0109 
0110 #: ../../color_management/basis_knowledge.rst:49
0111 msgid "Usual Definitions"
0112 msgstr ""
0113 
0114 #: ../../color_management/basis_knowledge.rst:51
0115 msgid ""
0116 "What follow is some additional comments and definitions to understand the "
0117 "Color Management:"
0118 msgstr ""
0119 
0120 #: ../../color_management/basis_knowledge.rst:53
0121 msgid ""
0122 "**Assign** a profile means change the meaning of the RGB numbers in an image "
0123 "by embedding a new profile without changing the actual RGB numbers "
0124 "associated with each pixel in the image. **Convert** to a profile means "
0125 "embed a new profile, but also change the RGB numbers at the same time so "
0126 "that the meaning of the RGB values - that is, the real-world visible color "
0127 "represented by the trio of RGB numbers associated with each pixel in an "
0128 "image - remains the same before and after the conversion from one space to "
0129 "another."
0130 msgstr ""
0131 
0132 #: ../../color_management/basis_knowledge.rst:55
0133 msgid ""
0134 "On the other hand, every time you assign a new working space profile rather "
0135 "than convert to a new working space (except when initially assigning a "
0136 "camera profile to the image file you get from your RAW processing software), "
0137 "the appearance of the image should more or less drastically change (usually "
0138 "for the worse, unless the wrong profile had previously been inadvertently "
0139 "embedded in the image)."
0140 msgstr ""
0141 
0142 #: ../../color_management/basis_knowledge.rst:57
0143 msgid ""
0144 "In theory, you should be able to do multiple conversions of an image from "
0145 "one working space to another, and if you are using a color-managed image "
0146 "editor, even though all the RGB numbers in the image will change with each "
0147 "conversion, the image displayed on your screen should look the same. In "
0148 "actual fact, because of rounding errors upon each conversion, not to mention "
0149 "gamut-clipping when going from a larger to a smaller working space, every "
0150 "time you convert from one space to another the image degrades a bit."
0151 msgstr ""
0152 
0153 #: ../../color_management/basis_knowledge.rst:59
0154 msgid ""
0155 "**Device-dependent** and **device-independent** profiles: The camera "
0156 "profile, a scanner profile, your monitor's profile, and your printer's color "
0157 "profile are all device-dependent profiles - these profiles only work with "
0158 "the specific device for which they were produced by means of profiling. "
0159 "Working space profiles and the Profile Connection Space are *device-"
0160 "independent*. Once an image file has been translated by Lcms to a device-"
0161 "independent working space, in a sense it no longer matters what device "
0162 "originally produced the image. But as soon as you want to display or print "
0163 "the image, then the device (monitor, printer) used matters a great deal and "
0164 "requires a device-dependent profile."
0165 msgstr ""
0166 
0167 #: ../../color_management/basis_knowledge.rst:61
0168 msgid ""
0169 "An **interpolated RAW file** isn't a RAW file. For some reason this simple "
0170 "point causes a lot of confusion. But after a RAW file has been interpolated "
0171 "by RAW processing software and then output as a TIFF or JPEG, the original "
0172 "RAW file is still a RAW file, of course, but the interpolated file is just "
0173 "an image file. It isn't a RAW file."
0174 msgstr ""
0175 
0176 #: ../../color_management/basis_knowledge.rst:63
0177 msgid ""
0178 "**Linear** has two related and easily confused definitions. *Linear* can "
0179 "mean that the image tonality reflects the tonality in the original scene as "
0180 "photographed instead of being altered by the application of an S-curve or "
0181 "other means of changing local and global tonality. It can also mean that the "
0182 "gamma transfer curve of the color space is linear. An image can be *linear* "
0183 "in either, both, or neither of these two senses. A RAW image as developed by "
0184 "Libraw is linear in both senses. The same image as developed by Canon's RAW "
0185 "processing software won't be linear in either sense."
0186 msgstr ""
0187 
0188 #: ../../color_management/basis_knowledge.rst:65
0189 msgid ""
0190 "**HDR** and **LDR** do not refer to the bit-depth of the image. **High "
0191 "dynamic range** and **Low dynamic range** refer to the total dynamic range "
0192 "encompassed by an image. A regular low dynamic range image, say encompassing "
0193 "a mere 5 *stops* (the average digital camera these days can easily "
0194 "accommodate 8 or 9 stops), can be saved as an 8-, 16-, 32-, or even 64-bit "
0195 "image, depending on your software, but the dynamic range of the image isn't "
0196 "thereby increased. Only the number of discrete steps from the brightest to "
0197 "the darkest tone in the image has changed. Conversely, a 22-stop scene (way "
0198 "beyond the capacity of a consumer-oriented digital camera without using "
0199 "multiple exposures) can be saved as an 8- or 16-bit image, but the resulting "
0200 "image will exhibit extreme banding (that is, it will display extreme banding "
0201 "in any given tonal range that can actually be displayed on a typical monitor "
0202 "at one time) because of the relatively few available discrete tonal steps "
0203 "from the lightest to the darkest tone in the image."
0204 msgstr ""
0205 
0206 #: ../../color_management/basis_knowledge.rst:67
0207 msgid ""
0208 "**In-camera produced JPEGs don't need a camera profile**: All JPEGs (or "
0209 "TIFFs) coming straight out of a camera (even if produced by point-and-shoots "
0210 "cameras that don't allow you to save a RAW file) start life inside the "
0211 "camera as a RAW file produced by the camera's Analog to Digital converter. "
0212 "If you save your images as JPEGs, then the processor inside the camera "
0213 "interpolates the RAW file, assigns a camera profile, translates the "
0214 "resulting RGB numbers to a working space (usually **sRGB** but sometimes you "
0215 "can choose **AdobeRGB**, depending on the camera), does the JPEG "
0216 "compression, and stores the JPEG file on your camera card. So JPEGs (or "
0217 "TIFFs) from your camera don't need to be assigned a camera profile which is "
0218 "then translated to a working space. JPEGs from a camera are already in a "
0219 "working space."
0220 msgstr ""
0221 
0222 #: ../../color_management/basis_knowledge.rst:69
0223 msgid ""
0224 "**Useful mathematical information**: If you are dealing with Libraw's linear "
0225 "gamma output: Mathematically speaking, when doing a gamma transform you "
0226 "normalize (that is, divide by 256 if you are working with 8-bit values) the "
0227 "RGB numbers and raise the resulting numbers to an appropriate power "
0228 "depending on the respective gammas of the starting and ending color space, "
0229 "then re-normalize the results to a new set of RGB numbers. It's not hard, "
0230 "and very instructive, to do this with a calculator for a few sets of RGB "
0231 "numbers spaced from (0,0,0) to (255,255,255) to see how RGB numbers change "
0232 "from one gamma encoding to another. Lcms does this for you when you ask Lcms "
0233 "to convert from one color space to another."
0234 msgstr ""
0235 
0236 #: ../../color_management/basis_knowledge.rst:71
0237 msgid "**Copyrighted and copyleft working spaces**:"
0238 msgstr ""
0239 
0240 #: ../../color_management/basis_knowledge.rst:73
0241 msgid ""
0242 "The several variants of **sRGB**. See :ref:`the chapter <monitor_profiles>` "
0243 "dedicated to this color space."
0244 msgstr ""
0245 
0246 #: ../../color_management/basis_knowledge.rst:75
0247 msgid "BruceRGB or BestRGB."
0248 msgstr ""
0249 
0250 #: ../../color_management/basis_knowledge.rst:77
0251 msgid ""
0252 "The various ECI (`European color initiative <https://en.wikipedia.org/wiki/"
0253 "European_Color_Initiative>`_) working space profiles."
0254 msgstr ""
0255 
0256 #: ../../color_management/basis_knowledge.rst:79
0257 msgid ""
0258 "**AdobeRGB**, Adobe **WideGamutRGB**, and Kodak/Adobe **ProPhotoRGB** (Kodak "
0259 "and Adobe ProPhoto are the same, just branded differently) and their non-"
0260 "branded, non-copyrighted counterparts."
0261 msgstr ""
0262 
0263 #: ../../color_management/basis_knowledge.rst:85
0264 msgid ""
0265 "digiKam Image Editor Color Space Converter Allows to Switch to Another Color "
0266 "Profile"
0267 msgstr ""
0268 
0269 #: ../../color_management/basis_knowledge.rst:87
0270 msgid ""
0271 "And quite a few other working spaces that could be added to this list, are "
0272 "all more or less suitable as working spaces. Which working space you should "
0273 "use depends only and solely on you, on your requirements on the Image Editor "
0274 "with your eventual output intentions (web, fine art print, etc.). However, "
0275 "as a critical aside, if you are using Adobe or other copyrighted working "
0276 "space profiles, these profiles contain copyright information that shows up "
0277 "in your image Exif information."
0278 msgstr ""
0279 
0280 #: ../../color_management/basis_knowledge.rst:89
0281 msgid ""
0282 "**Soft Proofing** is a way of previewing on the screen the result to be "
0283 "expected from an output on another device, typically a printer. Soft "
0284 "proofing will show you the difference to be expected before you actually do "
0285 "it (and waste your costly ink). So you can improve your settings without "
0286 "wasting time and money. For more information take a look to the dedicated :"
0287 "ref:`section from this manual <soft_proof>`."
0288 msgstr ""
0289 
0290 #: ../../color_management/basis_knowledge.rst:91
0291 msgid ""
0292 "**Rendering intent** refers to the way gamuts are handled when the intended "
0293 "target color space cannot handle the full gamut. For more information take a "
0294 "look to the dedicated :ref:`section from this manual <working_space>`."
0295 msgstr ""
0296 
0297 #: ../../color_management/basis_knowledge.rst:94
0298 msgid "Color Space Connections"
0299 msgstr ""
0300 
0301 #: ../../color_management/basis_knowledge.rst:96
0302 msgid ""
0303 "The question for each RGB trio of values in the (let us assume) 16-bit TIFF "
0304 "produced by Libraw becomes, what does a particular trio of RGB values for "
0305 "the pixels making up images produced by this particular (make and model) "
0306 "camera really mean in terms of some absolute standard referencing some ideal "
0307 "observer."
0308 msgstr ""
0309 
0310 #: ../../color_management/basis_knowledge.rst:98
0311 msgid ""
0312 "This absolute standard referencing an ideal observer is more commonly called "
0313 "a **Profile Connection Space** (PCS). A camera profile is needed to "
0314 "accurately characterize or describe the response of a given camera's pixels "
0315 "to light entering that camera, so that the RGB values in the output file "
0316 "produced by the RAW converter can be translated first into an absolute "
0317 "Profile Connection Space and then from the Profile Connection Space to your "
0318 "chosen working space."
0319 msgstr ""
0320 
0321 #: ../../color_management/basis_knowledge.rst:100
0322 msgid ""
0323 "As a very important aside, in digiKam the software used to translate from "
0324 "the camera profile to the Profile Connection Space and from the Profile "
0325 "Connection Space to your chosen working space and eventually to your chosen "
0326 "output space (for printing or perhaps monitor display) is based on `Lcms "
0327 "<https://www.littlecms.com/>`_ (the **Little Color Management** engine). For "
0328 "what it's worth, Lcms does more accurate conversions than Adobe's "
0329 "proprietary color conversion engine. Further, the RAW conversion in digiKam "
0330 "is based on decoding of the proprietary RAW file done by **Libraw**. `This "
0331 "library <https://www.libraw.org/>`_, is a great open-source component as "
0332 "without it we'd all be stuck using the usually Windows or Mac only "
0333 "proprietary software that comes with our digital cameras. The Libraw's "
0334 "interpolation algorithms (not to be confused with the aforementioned "
0335 "decoding of the proprietary RAW file), which are part of digiKam if properly "
0336 "used, produce results equal or superior to commercial, closed source "
0337 "software."
0338 msgstr ""
0339 
0340 #: ../../color_management/basis_knowledge.rst:102
0341 msgid ""
0342 "There are two commonly used Profile Connection Spaces - **CIELAB** and "
0343 "**CIEXYZ** (see this `wikipedia Color management section <https://en."
0344 "wikipedia.org/wiki/Color_management#Color_transformation>`_ for details). "
0345 "Lcms uses the camera profile to translate the RGB values from the "
0346 "interpolated RAW file, into the appropriate Profile Connection Space "
0347 "(usually CIEXYZ). A profile connection space is not itself a working space. "
0348 "Rather a **Profile Connection Space** is an absolute reference space used "
0349 "only for translating from one color space to another - think of a **Profile "
0350 "Connection Space** as a **Universal Translator** for all the color profiles "
0351 "that an image might encounter in the course of its journey from camera RAW "
0352 "file to final output:"
0353 msgstr ""
0354 
0355 #: ../../color_management/basis_knowledge.rst:104
0356 msgid ""
0357 "Lcms uses the camera profile, also called an **Input profile**, to translate "
0358 "the interpolated Libraw-produced RGB numbers, which only have meaning "
0359 "relative to your (make and model of) camera, to a second set of RGB numbers "
0360 "that only have meaning in the **Profile Connection Space**."
0361 msgstr ""
0362 
0363 #: ../../color_management/basis_knowledge.rst:106
0364 msgid ""
0365 "Lcms translates the **Profile Connection Space** RGB numbers to the "
0366 "corresponding numbers in your chosen **Working space** so you can edit your "
0367 "image. And again, these working space numbers only have meaning relative to "
0368 "a given working space. The same red, visually speaking, is represented by "
0369 "different trios of RGB numbers in different working spaces; and if you "
0370 "assign the wrong profile the image will look wrong, slightly wrong or very "
0371 "wrong depending on the differences between the two profiles."
0372 msgstr ""
0373 
0374 #: ../../color_management/basis_knowledge.rst:108
0375 msgid ""
0376 "While you are editing your image in your chosen **Working space**, then Lcms "
0377 "should translate all the working space RGB numbers back to the **Profile "
0378 "Connection Space**, and then over to the correct RGB numbers that enable "
0379 "your monitor (your display device) to give you the most accurate possible "
0380 "display representation of your image as it is being edited. This translation "
0381 "for display is done on the fly and you should never even notice it "
0382 "happening, unless it doesn't happen correctly - then the displayed image "
0383 "will look wrong."
0384 msgstr ""
0385 
0386 #: ../../color_management/basis_knowledge.rst:110
0387 msgid ""
0388 "When you are satisfied that your edited image is ready to share with the "
0389 "world, Lcms translates the **Working space** RGB numbers back into the "
0390 "**Profile Connection Space** space and out again to a **Printer color "
0391 "space** using a **Printer profile** characterizing your printer/paper "
0392 "combination (if you plan on printing the image) or to sRGB (if you plan on "
0393 "displaying the image on the web or emailing it to friends or perhaps "
0394 "creating a slide-show to play on monitors other than your own)."
0395 msgstr ""
0396 
0397 #: ../../color_management/basis_knowledge.rst:112
0398 msgid ""
0399 "To back up a little bit and look at the first color profile an image "
0400 "encounters, that is, the camera profile (see point 1. immediately above) - "
0401 "Libraw can in fact apply your camera profile for you (Libraw uses Lcms "
0402 "internally). But the generating data composed of the interpolated RGB values "
0403 "derived from the camera RAW file, and the application of the camera profile "
0404 "to the interpolated file, are two very distinct and totally separable "
0405 "(separable in theory and practice for Libraw; in theory only for most RAW "
0406 "converters) steps."
0407 msgstr ""
0408 
0409 #: ../../color_management/basis_knowledge.rst:115
0410 msgid "Camera Profiles"
0411 msgstr ""
0412 
0413 #: ../../color_management/basis_knowledge.rst:117
0414 msgid ""
0415 "This manual section has a bit of information on where to find ready-made "
0416 "camera profiles. It's an unfortunate fact of digital imaging that the camera "
0417 "profiles supplied by Canon, Nikon, and the like don't work as well with RAW "
0418 "converters other than each camera manufacturer's own proprietary RAW "
0419 "converter. They have to make their own profiles for all the cameras that "
0420 "they support - keep this proprietary propensity of your camera manufacturer "
0421 "in mind next time you buy a digital camera."
0422 msgstr ""
0423 
0424 #: ../../color_management/basis_knowledge.rst:119
0425 msgid ""
0426 "To finding a camera profile for your camera is to make your own camera "
0427 "profile or have one made for you. There are quite a few commercial services "
0428 "who provide profiling services (for a fee, of course). Or you can use "
0429 "`Argyll <http://www.argyllcms.com/>`_ to profile your camera yourself. We "
0430 "cannot speak about how easy or difficult the process of profiling a camera "
0431 "might be. But we would imagine, knowing how very meticulous the people "
0432 "behind Argyll, and Lcms are about color management, that making your own "
0433 "camera profile is very do-able and very likely the results will be better "
0434 "than any proprietary profile. After all, Canon didn't profile your camera, "
0435 "they just profiled a camera like your."
0436 msgstr ""
0437 
0438 #: ../../color_management/basis_knowledge.rst:121
0439 msgid ""
0440 "For more information take a look to the dedicated :ref:`section from this "
0441 "manual <camera_profiles>`."
0442 msgstr ""
0443 
0444 #: ../../color_management/basis_knowledge.rst:127
0445 msgid ""
0446 "If your Photograph Include a Color Profile from your Camera digiKam Can show "
0447 "this in Colors Sidebar Tab"
0448 msgstr ""
0449 
0450 #: ../../color_management/basis_knowledge.rst:130
0451 msgid "Working Spaces"
0452 msgstr ""
0453 
0454 #: ../../color_management/basis_knowledge.rst:132
0455 msgid ""
0456 "So now your RAW file has been interpolated by Libraw and you've obtained a "
0457 "camera profile and used Lcms to apply your camera profile. What does all "
0458 "this mean? The real answer involves a lot of math and color science that "
0459 "goes way over my head and likely yours. The short, practical answer is that "
0460 "neither the camera profile space nor the Profile Connection Space is an "
0461 "appropriate space for image editing."
0462 msgstr ""
0463 
0464 #: ../../color_management/basis_knowledge.rst:134
0465 msgid ""
0466 "Your next step is to choose a working space for image editing. Lcms, the "
0467 "color management engine that digiKam uses, perform a double translation. "
0468 "First Lcms uses the camera profile to translate the RGB values of each pixel "
0469 "in the Libraw output image without camera-profile applied into the "
0470 "aforementioned Profile Connection Space. Then it translates the RGB values "
0471 "of each pixel from the Profile Connection Space to your chosen working space."
0472 msgstr ""
0473 
0474 #: ../../color_management/basis_knowledge.rst:140
0475 msgid ""
0476 "digiKam Knows Where to Find the Color Profiles Installed on Your System and "
0477 "list Files in Setup Dialog For Selection"
0478 msgstr ""
0479 
0480 #: ../../color_management/basis_knowledge.rst:142
0481 msgid ""
0482 "For more information take a look to the dedicated :ref:`section from this "
0483 "manual <working_space>`."
0484 msgstr ""