ho_co Posted September 19, 2006 Share #1 Posted September 19, 2006 Advertisement (gone after registration) If shooting with a camera offering the choice, which profile do you use, sRGB or Adobe RGB (1998)? What will be the usefulness of the M8's CIE RGB mode? Thanks. --HC Link to post Share on other sites More sharing options...
Advertisement Posted September 19, 2006 Posted September 19, 2006 Hi ho_co, Take a look here Preference question: sRGB or Adobe RGB (1998)?. I'm sure you'll find what you were looking for!
albertwang Posted September 19, 2006 Share #2 Posted September 19, 2006 I use abode RGB (wider color gamut than the S version). Link to post Share on other sites More sharing options...
cbretteville Posted September 19, 2006 Share #3 Posted September 19, 2006 Adobe RGB is a bigger colour space than is sRGB, i.e., more tones in the pallette. Capture using the largest colour space the camera offers, you can allways downsample it later in post processing. Cie Rgb is also larger than sRGB, Google it and you'll get lots of results. Hers is on article: CIE 1931 color space - Wikipedia, the free encyclopedia - Carl Link to post Share on other sites More sharing options...
albertwang Posted September 19, 2006 Share #4 Posted September 19, 2006 The question now is how to go from CIE RBG to Abode RBG? I use this profiling to match for printing out on an Epson. Link to post Share on other sites More sharing options...
cbretteville Posted September 19, 2006 Share #5 Posted September 19, 2006 PSCS2, at least (probably older versions as well) knows of CIE Rgb, it wil do the conversion for you. - C Link to post Share on other sites More sharing options...
skunkworks Posted September 19, 2006 Share #6 Posted September 19, 2006 um, that's "ECI RGB", it has the largest gamut of the 3, and it's what i always use for my RGB settings in my workflow. needless to say, i was very happy to see it's implementation in the M8. Link to post Share on other sites More sharing options...
ho_co Posted September 19, 2006 Author Share #7 Posted September 19, 2006 Advertisement (gone after registration) um, that's "ECI RGB", it has the largest gamut of the 3, and it's what i always use for my RGB settings in my workflow. Jonathan--Thanks for the correction! But I'm still left with the same question: What is the usefulness of the color space? I understand the idea of keeping files at 16 bits as long as possible, and of keeping as large a color space as possible. Albert above says he outputs to his printer with the Adobe (1998) RGB profile, but not all printers can do that. Carl (as I understand) says he stays with the largest workspace as long as possible and converts when necessary. That of course gives him a fuller file for future use than when converted to sRGB for the web today. Is that the only usefulness of the ECI RGB color space, i.e. 'none today, but wait for later developments'? Thanks! Link to post Share on other sites More sharing options...
robsteve Posted September 19, 2006 Share #8 Posted September 19, 2006 Jonathan--Thanks for the correction! I understand the idea of keeping files at 16 bits as long as possible, and of keeping as large a color space as possible. Is that the only usefulness of the ECI RGB color space, i.e. 'none today, but wait for later developments'? Thanks! I don't think jpegs support 16 bit color, so if you shoot jpegs it may not be as important. When you shoot RAW, you can select the color space at time of conversion. In the converters I have used for the DMR, you can select any color space that is supported by your RAW converter and the file will be developed from RAW into that color space. The color space selected on the camera has no influence in RAW and as I mentioned above, jpegs are 8bit. Link to post Share on other sites More sharing options...
like_no_other Posted September 19, 2006 Share #9 Posted September 19, 2006 I have a question to those of you who use one of these large colour spaces. What monitor do you use? Isn't wysiwyg important when changing colours in photoshop. Wouldn't it be the best idea to use exactly the same colour space the monitor is capable to display? Link to post Share on other sites More sharing options...
jrgeoffrion Posted September 19, 2006 Share #10 Posted September 19, 2006 If shooting with a camera offering the choice, which profile do you use, sRGB or Adobe RGB (1998)? Thanks. --HC When shooting RAW, the color space does not affect the file converted image as it can be changed at the moment of conversion. HOWEVER, the embedded JPG and, consequently, the image displayed on the LCD and the associated histogram should reflect the choice of color space. As such, I always recommend selecting the smallest color space so that the histogram provides more valuable information as it will be more 'sensitive' since the space is smaller. Link to post Share on other sites More sharing options...
jrgeoffrion Posted September 19, 2006 Share #11 Posted September 19, 2006 I have a question to those of you who use one of these large colour spaces. What monitor do you use? Isn't wysiwyg important when changing colours in photoshop. Wouldn't it be the best idea to use exactly the same colour space the monitor is capable to display? When converting from one profile to another, you shouldn't really see a difference on your monitor since most colors converted will likely be outside the gamut of your screen so only the out-of-gamut color would be remapped. In other words, if you open a Adobe 98 file and convert it to sRGB (not assign), you shouldn't see any difference on your monitor. I use a calibrated DELL 3007. Link to post Share on other sites More sharing options...
skunkworks Posted September 20, 2006 Share #12 Posted September 20, 2006 As for why I use a larger-gamut color space, my work involves a lot of scanned film that will be viewed from many monitors and media. I have to expect final gamut to be much smaller and of consideable variance. The larger the gamut of the initial file the more accurate will be the conversion to whatever reduction I need to expect for the final output, whether to a specific device or for general distribution. Link to post Share on other sites More sharing options...
albertknappmd Posted September 20, 2006 Share #13 Posted September 20, 2006 Adobe RGB is felt to be the standard today. Large color gamut and sRGB is the Microsoft product. The latter is fine if all you do is show your photos on the WEB. Link to post Share on other sites More sharing options...
like_no_other Posted September 20, 2006 Share #14 Posted September 20, 2006 When converting from one profile to another, you shouldn't really see a difference on your monitor since most colors converted will likely be outside the gamut of your screen so only the out-of-gamut color would be remapped. In other words, if you open a Adobe 98 file and convert it to sRGB (not assign), you shouldn't see any difference on your monitor. I use a calibrated DELL 3007. Thanks for your qualified information. One more question. What is the difference between converting to and assigning a different colour space? My experiences are not very consistent. With some photos I don't see strong differences between different colour spaces. Some days ago I shot a photo of a red ferrari in adobe rgb. When I selected pro photo working space I saw a significant change from red in the direction to brown. Link to post Share on other sites More sharing options...
jrgeoffrion Posted September 20, 2006 Share #15 Posted September 20, 2006 Thanks for your qualified information. One more question. What is the difference between converting to and assigning a different colour space? My experiences are not very consistent. With some photos I don't see strong differences between different colour spaces. Some days ago I shot a photo of a red ferrari in adobe rgb. When I selected pro photo working space I saw a significant change from red in the direction to brown. In short, you should never 'assign' a profile. Assigning a profile is only in the case of a missing profile to re-establish the correct color scale. Link to post Share on other sites More sharing options...
skunkworks Posted September 20, 2006 Share #16 Posted September 20, 2006 Adobe RGB is felt to be the standard today. Large color gamut and sRGB is the Microsoft product. The latter is fine if all you do is show your photos on the WEB. ECI-RGB is from the European Color Initiative, and it's members are listed here: ECI - ECI |::| Members Link to post Share on other sites More sharing options...
john_f Posted September 21, 2006 Share #17 Posted September 21, 2006 FYI, This is an excellent and very comprehensive web page on color space: Color space - Wikipedia, the free encyclopedia JR, I had a good look at your web site and was quite impressed with your work - and your web site. Very well done! I have two questions: - How do you calibrate your monitor (ColorVision Spyder, etc..) and printer ? - About your (flash/studio) lighting equipment, do you use ever use this equipment inside the church? I have found that the use of artificial lighting (flash) in church weddings is often a source of problems either with the bride and groom and family members or with the priests/pastors. Not everyone likes flash being used at their wedding. What is your opinion on this issue? Thank you, John F. Link to post Share on other sites More sharing options...
jrgeoffrion Posted September 21, 2006 Share #18 Posted September 21, 2006 FYI,JR, I had a good look at your web site and was quite impressed with your work - and your web site. Very well done! I have two questions: - How do you calibrate your monitor (ColorVision Spyder, etc..) and printer ? - About your (flash/studio) lighting equipment, do you use ever use this equipment inside the church? I have found that the use of artificial lighting (flash) in church weddings is often a source of problems either with the bride and groom and family members or with the priests/pastors. Not everyone likes flash being used at their wedding. What is your opinion on this issue? Thanks for the kind words about my work and site. I calibrate my monitor with a Spyder. There are several devices available and they all do a pretty good job (much better than using Adobe Gamma manually anyway). For the printer, I use the supplied "stock" profile or my lab color space. With regards to lighting, I don't use flash inside the church (including the processional or recessional). I prefer to use a wider aperture. In addition, using ambient light only gives a constant look and feel to all the images. Link to post Share on other sites More sharing options...
wda Posted September 21, 2006 Share #19 Posted September 21, 2006 Surely choice of colour space is only valid if you have set your imaging programme for 'colour management'. I guess may users never do that. Choice also depends on your ultimate output. Most people supplying the media advocate Adobe RGB 1998 I believe. David Link to post Share on other sites More sharing options...
albertwang Posted September 21, 2006 Share #20 Posted September 21, 2006 Also reassigning profiles for a picture can mess up the final output of printing the picture. Always make sure that you keep the same profile from start to finish so that you can know that you're getting the right colors that you want. Even black and white needs this too. One does want the correct tonalities as well. Link to post Share on other sites More sharing options...
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