<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>The conversion to an output color profile is always made in an calibrated workflow when you print : DK makes it itself, that's why you can specify an output color profile for your printer in DK's settings.</span></div><div><span>For printing labs, some (the more professionnals, perfect for unique jobs but not for mass ones) make properly the conversion from sRGB to the needed profile (in this case, I don't have any problem), some don't make anything if you refuse automatic corrections and ask you to convert your pictures in their ICC profiles. </span></div><div><span><br></span></div><div><span>And yes, sometimes (especially for prints on aluminium or PVC) I would need to separate pictures in CYMK, then in a corresponding profile. </span></div><div><br></div><div style="font-size: 12pt; font-family: 'times
new roman', 'new york', times, serif; "><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "><font size="2" face="Arial"><hr size="1"><b><span style="font-weight:bold;">De :</span></b> Martin (KDE) <kde@fahrendorf.de><br><b><span style="font-weight: bold;">À :</span></b> digikam-users@kde.org<br><b><span style="font-weight: bold;">Envoyé le :</span></b> Vendredi 7 Octobre 2011 16h59<br><b><span style="font-weight: bold;">Objet :</span></b> Re: [Digikam-users] Re : Re : Choose another ICC profile for converting pictures<br></font><br>Am Freitag, 7. Oktober 2011 schrieb Paulux:<br>> Thanks to all for answers.<br>> <br>> @Martin (KDE) : thanks, I know what is soft proofing and how to use<br>> it in DK ;) (even if the result is not satisfying, too red), and<br>> it's absolutely not what I want to do.<br>> <br>> @Remco (french ?) : English is not my native language, so
perhaps<br>> I've not clearly explained my thought : I know the differences<br>> between color spaces and ICC profiles, but the only tool to<br>> convert a picture in this domain is the color space conversion<br>> tool. And that's exactly what I whant to do (because I kown what<br>> I'm doing, thx). Commercial printing services often (always) make<br>> automatic corrections on the pictures you send them. Although,<br>> some of them offer the ability to refuse this way and purpose ICC<br>> profiles for each combination of printer, paper and ink they use.<br>> So if you want to use their services, you MUST convert you picture<br>> in the ICC profile corresponding to the product you want.<br><br>Huch, that is new to me. My printing lab provides profiles and does <br>not require me to convert the pictures to any specific colour space. <br>An labs using automatic corrections are not worth the try for serious
<br>photo printing. the results are unpredictable.<br><br>I still don't see the need for converting a photo to a output colour <br>profile (besides the lab requires it - but why?).<br><br>The only reason I can imagine of is if the printing colour space is <br>much smaller than the working colour space. Then you have the control <br>in how the colours should be corrected. But this can be done in the <br>working colour space (or a different working colour space) as well. <br>That's what the soft proofing for.<br><br>Do you have to separate the photo to CYMK as well?<br><br>Martin<br><br>> <br>> The quickly way to do it with DK should that color space conversion<br>> tool allows to choose some output ICC profiles. How to do it ? <br>> <br>> PLX<br>> <br>> <br>> ________________________________<br>> De : Remco Viëtor <<a ymailto="mailto:remco.vietor@wanadoo.fr"
href="mailto:remco.vietor@wanadoo.fr">remco.vietor@wanadoo.fr</a>><br>> À : digiKam - Home Manage your photographs as a professional with<br>> the power of open source <<a ymailto="mailto:digikam-users@kde.org" href="mailto:digikam-users@kde.org">digikam-users@kde.org</a>> Envoyé le :<br>> Vendredi 7 Octobre 2011 8h20<br>> Objet : Re: [Digikam-users] Re : Choose another ICC profile for<br>> converting pictures<br>> <br>> On Friday 07 October 2011 07:31:05 Martin wrote:<br>> > Am 06.10.2011 21:12, schrieb Paulux:<br>> > > I've a precision to make : as I understand the Digikam way to<br>> > > manage ICC profile, it now (I'm sure it wasn't the case in the<br>> > > past) sorts profiles by type (i.e. the output profiles menu<br>> > > only shows and manages output type profiles, and so on).<br>> > > That's roughly a good idea for the digikam control panel, BUT<br>> > >
not for the color space conversion tool in picture editor and<br>> > > batch tool. This one only shows display ICC profiles, but it<br>> > > should offer output ICC profiles in order to completely<br>> > > control the colors behavior before print works, especially<br>> > > with remote laboratories.<br>> > <br>> > I don't think it is a good idea to convert a photo to the colour<br>> > space of the printing machine. These profiles should be used for<br>> > soft proofing only and this has nothing to do with the workspace<br>> > colour profile (these must not and mostly do not match the<br>> > display profile).<br>> <br>> ..<br>> Even worse: screen and printer profiles are NOT colour spaces, but<br>> only output corrections from a (device-independent) colour space<br>> to an imperfect output device. They are specific for a combination<br>> of a colour space and a
device.<br>> <br>> A colour space describes how a colour we can see under standardised<br>> lighting conditions is encoded in an RGB triplet. This is<br>> absolutely device- independent.<br>> <br>> So a colour workspace cannot 'match' a display profile, they are<br>> completely different beasts and should be used together to get the<br>> best output possible.<br>> <br>> Yes, I know both colour spaces and device profiles have .icc or<br>> .icm extensions, but again, they are completely different<br>> concepts.<br>> <br>> So, please leave your images in the sRGB colour space, unless you<br>> REALLY know what you are doing:<br>> a lot of questions concerning dark, muddy, unsaturated colours in<br>> prints come from people using e.g. Adobe RGB as editing colour<br>> space, and then sending of those images to a commercial printer<br>> (99+ % of those expect sRGB and don't check...)<br>> <br>>
Remco<br>> _______________________________________________<br>> Digikam-users mailing list<br>> <a ymailto="mailto:Digikam-users@kde.org" href="mailto:Digikam-users@kde.org">Digikam-users@kde.org</a><br>> <a href="https://mail.kde.org/mailman/listinfo/digikam-users" target="_blank">https://mail.kde.org/mailman/listinfo/digikam-users</a><br><br>_______________________________________________<br>Digikam-users mailing list<br><a ymailto="mailto:Digikam-users@kde.org" href="mailto:Digikam-users@kde.org">Digikam-users@kde.org</a><br><a href="https://mail.kde.org/mailman/listinfo/digikam-users" target="_blank">https://mail.kde.org/mailman/listinfo/digikam-users</a><br><br><br></div></div></div></body></html>