Marti wrote: > Keep in mind color transforms are a loosy process--you may loss information > each time you apply a color transform. In this way, it is generally > better to > do the color management at the last stage. I.e., load the image using > its native > representation and do the conversion to monitor space at display time.
That's what I had tried. But I am doing some editing on the image, and the profile conversion was really slowing down the display. Even though it's a bit lossy, I decided to do the conversion on LOAD, then embed the eventual profile in the saved image. Thanks for the advice! > > That is, unless you plan to edit the image. In this case, you probably > want to > do the image processing in some well-known space. This is the whole point > of workspaces. My recomendation would be to avoid workspaces unless you > really needs that. > > For untagged images, you have several options. One would be to let end > user to > select the default colorspace. Many devices (printers, etc) operates in > such way. > Otherwise, you could assume untagged data is in some default colorspace. > Reasonable defaults would be sRGB (cmsCreate_sRGBProfile) for RGB and > SWOP or ISO coated for CMYK. > > Regards > Marti Maria > The littleCMS project > http://www.littlecms.com > > > > ----- Original Message ----- From: "Paul Miller" <[EMAIL PROTECTED]> > To: <lcms-user@lists.sourceforge.net> > Sent: Sunday, July 30, 2006 7:38 PM > Subject: [Lcms-user] need advice on adding cms to an image viewer > > >> I am working on an image manipulator/viewer and I want to support ICC >> color profiles so the image will look "right" on the monitor and >> printers. >> >> I don't have any experience with ICC profiles but I shouldn't have any >> problem integrating the lcms library into my application. But I'm not >> sure where in the process I need to do the color conversion, and what I >> should use as a source profile when loading an image that doesn't have >> one. >> >> Do I need to do a transform on LOAD to get the image into some common >> working space (like sRGB), then another transform at display time to >> integrate the desired output profile? If the image contains an ICC >> profile, should I transform from that profile to the "working" profile? >> What happens if there is no embedded profile? >> >> I appreciate any and all pointers on this matter! >> >> >> -- >> Paul Miller | [EMAIL PROTECTED] | www.fxtech.com | Got Tivo? >> >> >> ------------------------------------------------------------------------- >> Take Surveys. Earn Cash. Influence the Future of IT >> Join SourceForge.net's Techsay panel and you'll get the chance to >> share your >> opinions on IT & business topics through brief surveys -- and earn cash >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV >> _______________________________________________ >> Lcms-user mailing list >> Lcms-user@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/lcms-user >> >> > > -- Paul Miller | [EMAIL PROTECTED] | www.fxtech.com | Got Tivo? ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
