Cannot use layers if file has been converted from raw to Tiff.

P
Posted By
Phosphor
Aug 20, 2003
Views
225
Replies
5
Status
Closed
Any help would be appreciated! I am using PS 7.1 with Windows XP. When I convert a raw image taken on a Fuji S2Pro and convert it to a Tiff with Fuji’s Raw file conversion software, I cannot use layer in Photoshop. If I try to add a adjustment layer in the layers pallet I get a circle with a line thru it. If I go to the layers in the tool bar it is gray and nothing works.
If I shoot a Tiff I have no problem only when I convert raw to tiff. I have talked with Fuji tech services and they think the problem is in Adobe. I suspect Adobe too because I had several other problems that arose after changing to Windows XP.
Anyone have an Idea what is going on?
Related Tags
conversion file layer tiff use

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P
Phosphor
Aug 20, 2003
I think the image is in 16-bit color, try changing the image mode to 8-bit.
BF
Brendon Fewel
Aug 26, 2003
Shades? Of how many colors? How many colors can an 8 bit Tiff have, and how many colors can a 16 bit tiff have? Total.
Y
YrbkMgr
Aug 26, 2003
In either case, more than you can see or print.
M
Madsen
Aug 26, 2003
Brendon Fewel wrote:

Shades?

Yes shades. 8 bit in Photoshop means 8 bit per channel. (8 bit means ²8 or 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 = 256).
In a RGB image you have 3 channels (red, green and blue) and each channel can hold up to 256 different shades of the channels color. It means that the red channel can hold up to 256 different shades of red, the blue can hold up to 256 different shades of blue and the green channel can hold up to 256 different shades of green.

How many colors can an 8 bit Tiff have,

A 24 bit RGB image (8 bit per channel image from Photoshop’s point of view) can have around 16.7 million colors (256 x 256 x 256). It’s also called true color.

and how many colors can a 16 bit tiff have? Total.

A 16 bit RGB image in Photoshop means 65536 (²16) different shades per channel. If it’s a RGB image, you can therefore have up to 65635 x 65635 x 65635 different colors. My calculator can’t give me that number but it’s a very high number.
Even if you can’t see that many colors, there can be an advantage of making adjustments in 16 bit mode, but it depends on the image and what corrections you need to make.

You can read more about it in this article:
<http://www.creativepro.com/story/feature/7627.html>

—
Regards
Madsen.
BF
Brendon Fewel
Aug 26, 2003
That’s exactly what I needed. Thank you, thank you, thank you!

I got the 256 color part, but I didn’t make the step to 256x256x256. I was thinking of 256 colors in red, another 256 in green and another in blue. I was mentally thinking of them as seperate individual colors, not able to be mixed together (256+256+256=768) The combinations between the colors was what I needed to get. Thank you for your patience!

Brendon

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