I always set the colour space in my camera to adobe RGB and shoot in RAW. Then, when I develop images with NX2, at the last stage when I save the image into a jpeg file I switch the colour space to sRGB. This works fine and I have encountered no problem.
But recently when I try to do the same thing with Photoshop CS5, I encounter a problem. I develope the RAW image with 16 bits/chanel and proPhoto RGB colour. Then, after I finish it and prepare to save the image into a jpeg file, I first switch the 16 bits/channel to 8 bits/chanel and in the menu View->Proof Setup->choose the "Internet Standard RGB (sRGB)". Then I "Save As" and choose the format "jpeg", then a dialogue pops up with an option for "color", which contains two oprions: (1) Use proof setup (which is in grey so cannot be checked); (2) ICC profile adobe RGB (1998) (which is checked by defaut). Then I "de-check" the adobe RGB option (2), but (1) is still grey. If I save the file then I guess the file is saved in "proPhoto RGB" since the saved image is displayed with wrong colour in some image viewers.
Can sombody tell me what is the correct way to save the image in jpeg with sRGB colour?
Many thanks,
Frank
well i think that if you want the output to be in srgb it might be best to process the picture in srgb so that any colours outside the profile limits are not clipped at the conversion…..but if you want multiple choice outputs then for srgb jpegs there are two ways to go(that i know of) -
(1) before saving go to : edit / convert to profile / convert to srgb
- or -
(2) go to : file / save for web and devices / tick the convert to srgb tab - this method prefers the pictures to be not too large and will compress the file size as best as it can
[quote name='soLong' timestamp='1339877168' post='18931']
(1) before saving go to : edit / convert to profile / convert to srgb
[/quote]
Thank you, soLong. This is exactly the function that I was looking for.
Regards,
Frank
Do you have the color profile in Adobe set to sRGB in the first place? Else you are editing and judging the image in a different color space. If it is in sRGB in the first place no converting needs to take place.
Set color workspace via:
Edit / Color Settings / Working spaces / RGB.
I set the color space to ProPhoto RGB via Edit / Color Settings / Working spaces / RGB and set the bits to 16 first, then start processing. After the work I convert color to sRGB and bits to 8 and then save the image to a jpeg file.
[quote name='Frank' timestamp='1339925488' post='18941']
I set the color space to ProPhoto RGB via Edit / Color Settings / Working spaces / RGB and set the bits to 16 first, then start processing. After the work I convert color to sRGB and bits to 8 and then save the image to a jpeg file.
[/quote]
What reason do you have to work in such a huge color space judge the results on screen in that, and then convert back to sRGB? What is the reason for you to use ProPhoto RGB?
[quote name='Brightcolours' timestamp='1339930777' post='18942']
What reason do you have to work in such a huge color space judge the results on screen in that, and then convert back to sRGB? What is the reason for you to use ProPhoto RGB?
[/quote]
Because the color space in your camera is much larger than the Adobe RGB color space <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='  ' /> Please read http://www.luminous-landscape.com/tutorials/prophoto-rgb.shtml
[quote name='Frank' timestamp='1339934062' post='18944']
Because the color space in your camera is much larger than the Adobe RGB color space <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt=' ' /> Please read http://www.luminous-landscape.com/tutorials/prophoto-rgb.shtml
[/quote]
I know it is, but converting from one colour space to another is/can be problematic. It makes little sense to work with a big or huge color space if the intended output does not support that. Also, using a big color space that your screen can not even handle makes little sense too.
One of the problems of ProPhoto RGB is that it exceeds the visible spectrum in some areas of deep blues and deep greens. When editing an image it can happen that you shift colours into these fictional ranges, which can not be seen or reproduced, which can cause problems in the colours we see.
Also, since the gamut spaces are so wide, and does not have such wide gamut, the screen is not always capable of showing the effects of changes you make, especially with hue or saturation shifts.
ProPhoto RGB only really makes sense theoretically. Especially for people who have not too much understanding of what it means to work in 16bit colour spaces, color management fundamentals, soft proofing. Adobe-RGB is a safer option, if you feel sRGB is not wide enough.
bryan conner
Unregistered
[quote name='Brightcolours' timestamp='1339946286' post='18945']
I know it is, but converting from one colour space to another is/can be problematic. It makes little sense to work with a big or huge color space if the intended output does not support that. Also, using a big color space that your screen can not even handle makes little sense too.
One of the problems of ProPhoto RGB is that it exceeds the visible spectrum in some areas of deep blues and deep greens. When editing an image it can happen that you shift colours into these fictional ranges, which can not be seen or reproduced, which can cause problems in the colours we see.
Also, since the gamut spaces are so wide, and does not have such wide gamut, the screen is not always capable of showing the effects of changes you make, especially with hue or saturation shifts.
ProPhoto RGB only really makes sense theoretically. Especially for people who have not too much understanding of what it means to work in 16bit colour spaces, color management fundamentals, soft proofing. Adobe-RGB is a safer option, if you feel sRGB is not wide enough.
[/quote]
A problem of Adobe RGB is that it is smaller than the color space of most images captured by digital camera sensors. ProPhoto RGB is large enough to contain these colors, a lot of which are deep saturated colors. Why throw away information? I understand that ProPhoto is larger than what we can see. I also understand that ProPhoto is larger than any output device that we have today (print as well as monitor), but who knows what the future holds. Some of the colors that fall outside of aRGB fall within the colors of modern inkjet printers.
I agree, problems can occur when adjusting the color in ProPhoto. But, if a person understands color management, soft proofing and how to turn on the "out of gamut" warning, then ProPhoto will pose no problems. A person has to understand. That is all. If a person does not understand all of this, then aRGB is a safer space to work in. But, if a person wishes to maybe one day take advantage of all of the colors that their digital camera sensor can capture, then ProPhoto is the answer.
[quote name='Bryan Conner' timestamp='1339949355' post='18946']
A problem of Adobe RGB is that it is smaller than the color space of most images captured by digital camera sensors. ProPhoto RGB is large enough to contain these colors, a lot of which are deep saturated colors. Why throw away information? I understand that ProPhoto is larger than what we can see. I also understand that ProPhoto is larger than any output device that we have today (print as well as monitor), but who knows what the future holds. Some of the colors that fall outside of aRGB fall within the colors of modern inkjet printers.
I agree, problems can occur when adjusting the color in ProPhoto. But, if a person understands color management, soft proofing and how to turn on the "out of gamut" warning, then ProPhoto will pose no problems. A person has to understand. That is all. If a person does not understand all of this, then aRGB is a safer space to work in. But, if a person wishes to maybe one day take advantage of all of the colors that their digital camera sensor can capture, then ProPhoto is the answer.
[/quote]
Thank you, Bryan. The "out of gamut" warning is only used when converting RGB to CMYK (read it from Photoshop manual), isn't it? Just check with you for sure.
Regards,
Frank
|
