Color problem w/ LR export

[Richard_B]

I have a commercial scan of a landscape image which was saved as a JPEG. I converted it to a TIFF and opened it in Lightroom 2.7 making adjustments, including color. I went to export it for some additional work in PhotoShop CS4 (11.0.2).

When I opened the image file in PS all the colors were wildly incorrect. Needless to say, I am puzzled and would very much appreciate any suggestions about how I can remedy the situation.

TIA

[Rson]

Check your color profiles in lr and ps. Why the convert to tif from jpg?

[Rson]

My thoghts on JPG to Tif. If I have a cup of water and I pour the water in a cookie sheet to make it bigger...I still only have a cup of water it only looks bigger. If you have a JPG, the compression has already happened. Try editing it.

[Richard_B]

I will have to look into the color profiles. I am not sure how whatever they might be would cause this image to be processed differently than DNG or TIFF files processed from a Nikon D7k NEF file.

My thinking about converting the JPEG to a TIFF was to limit the compression artifacts to those already present and because the TIFF file should permit a greater range of color adjustment even though the file was once a JPEG. Is this incorrect?

I will try to look at the color profiles and report back.

Thanks

[venchka]

Just a theory. No facts at my disposal.
RAW/TIFF/ETC. to JPEG is a one way street. Once you have an 8-bit JPEG file, there is no going back. Or at least not totally back.
Color Space Gremlins: A JPEG is sRGB. Lightroom's color space is ProPhoto. Photoshop may default to AdobeRGB, not real sure. So, you have a possibilty for 3 competing color spaces conspiring against you.
Try Rich's idea: Edit the JPEG. You still won't have the same control as working with an original. It should at least be consistent from editor to editor.
What do you need to do in Photoshop that you can't do in Lightroom? Just curious. I'm keeping a scorecard to help me decide if I should buy Photoshop or not.

[Rson]

From what I understand, the JPG is the origional, thus the cup of water analogy.

[venchka]

I think we're both talking about the same thing. Once the zeros & ones are dumbed down to an 8-bit JPEG file there is no benefit from changing the file format.

I have, on occasion, gotten TIFF files from labs. They are few and far between. That's why I do all of my own scanning. 16-bit all the way. JPEG at the end for web display.