CS5.5 or CC – I have experienced several times that flat grayscale imaged - corrected and nice in PhotoShop turns up much too dark when placed in InDesign.
I make sure no effect or colors are applied to the frame or picture, but still no effect.
If I force transparency on the actual spread (by placing two white items on top of each other, the topmost multiplied on the master page) then it looks correct at once.
It makes no difference if it is a flat grayscale jpg or a psd, even a psd with a white background turns out this way.
Why is that? - Do you know?
BR Nina Storm
ID previews grayscales two different ways, when there's transparency on the page or Overprint Sep Preview is turned on, grayscales preview via the CMYK profile. With no transparency (or an RGB Transparency Blend space) they preview as sGray (2.2 Gamma), which is useful for screen design.
You can use your InDesign document's CMYK profile as the grayscale profile in Photoshop to get more consistent previews between ID and PS. Check this thread: