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07/20/2004 01:27:48 PM · #1 |
I was working on a friend's computer and tried to access duotone, only to find it is greyed out! They have Photoshop 6.0, does this version not support duotone? And if so, why have it show up on the menu at all? Can they turn it on somewhere?
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07/20/2004 01:29:47 PM · #2 |
You can only apply a duotone to a greyscale image so if the option is greyed out then chances are you are working on a RGB or other image.
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07/20/2004 01:32:45 PM · #3 |
Another question along this line:
Once I do a duotone and go to save it, Photoshop saves it as a Photoshop file instead of a jpg. I can't seem to find a way to convert it back to a jpg. What am I missing? |
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07/20/2004 01:32:56 PM · #4 |
It was a greyscale image, that's why I was wondering if there was something in PS that wasn't set up right or upgraded.
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07/20/2004 01:40:06 PM · #5 |
AFter u convert it to a duotone, u have to convert it back to rgb color to save it as a jpg.
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07/20/2004 01:43:41 PM · #6 |
Originally posted by airatic:
It was a greyscale image, that's why I was wondering if there was something in PS that wasn't set up right or upgraded. |
When you went into Mode was the arrow on Greyscale? Or was the image just black and white?
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07/20/2004 01:46:14 PM · #7 |
Well, I had converted it to greyscale on my home computer, then opened it on their computer, so maybe PS 6 reads later version greyscales as B&W? I didn't think to check that at the time.
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07/20/2004 01:51:33 PM · #8 |
Originally posted by airatic:
Well, I had converted it to greyscale on my home computer, then opened it on their computer, so maybe PS 6 reads later version greyscales as B&W? I didn't think to check that at the time. |
I've not had experience with transferring grayscale files between computers or different versions of PS but it could be that it was opened up as a RGB file even though it is greyscaled. One way to check for sure is the tick next to Grayscale under Mode. If the tick isnt there then just Greyscale it again and try Duotone then.
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07/20/2004 02:25:36 PM · #9 |
It matters if it is 8 bit and 16 bit also. Has to be 8 bit to be able to Duotone, after it is Greyscale.
I usually do RGB to Greyscale, 16 bit to 8 bit, Greyscale to Duotone, Set my colors, Duotone to RGB, 8 bit to 16 bit, Save as PSD or TIFF. Leave at 8 bit if saving as JPG.
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07/20/2004 02:31:23 PM · #10 |
Originally posted by dacrazyrn:
It matters if it is 8 bit and 16 bit also. Has to be 8 bit to be able to Duotone, after it is Greyscale.
I usually do RGB to Greyscale, 16 bit to 8 bit, Greyscale to Duotone, Set my colors, Duotone to RGB, 8 bit to 16 bit, Save as PSD or TIFF. Leave at 8 bit if saving as JPG. |
I would agree with this flow, but I don't think you gain any further advantage converting back to 16-bit once it's been down to 8-bit.
Photoshop Duotones can also be saved in Encapsulated PostScript (EPS) format, which gives you options for importing into various other programs, and an easy path to Acrobat PDF format. Photoshop can also save directly to PDF, but I'm not sure if it has to be converted to RGB first. |
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07/20/2004 02:53:20 PM · #11 |
Originally posted by GeneralE:
I would agree with this flow, but I don't think you gain any further advantage converting back to 16-bit once it's been down to 8-bit. |
Maybe, maybe not, but that is where it started (from my RAW files anyway), so I go back to it. (C:
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07/20/2004 03:00:00 PM · #12 |
Originally posted by dacrazyrn:
Originally posted by GeneralE:
I would agree with this flow, but I don't think you gain any further advantage converting back to 16-bit once it's been down to 8-bit. |
Maybe, maybe not, but that is where it started (from my RAW files anyway), so I go back to it. (C: |
There is no advantage going back to 16 bit mode.
All you do is waste disk space. Once you've gone to 8 bit mode, you've thrown away the extra precision data in the file anyway. Going back to 16 bit mode just pads this with zeros and increases the file size.
Even if you do fairly major additional post processing, the difference, assuming the most extreme edits, falls into the noise. There is no advanatage, in much the same way there is no advantage to converting JPEGs to 16 bit mode prior to doing any changes - the information is already gone, you can't recreate it, and the extra precision in adjustments is negligible - you increase the processing overhead and the storage overhead but it doesn't change the end results.
Message edited by author 2004-07-20 15:02:22.
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