I have had it where a Photoshop video preview did not look as good as a Vegas preview.
Put the image on the Vegas timeline. Switch preview quality to Best/Full. View on external monitor. Try a pan/crop zoom in. *That* is how the image will really look.
Photoshop video preview is very helpful, but the quality does not always look that great.
You also might try changing the background color in Photoshop before the video preview. Have a layer or white, another layer of black. Preview with the different background colors. This can also affect how the video preview in Photoshop looks.
IF anyone has more information, please take Vegas out of the equation.......THis might be a funny place to ask, but the above question is pertaining strictly and exclusively to Photoshop...
thanks again..
"in CS3: My images and text look like the edges are a bit rough."
Agreed. Download and try the trial version of CS4. There is a marked improvement in the quality of the images, although there is a requirement that your video card must (check system requirements). I have an Nvidia 8600GT that apparently meets those specs. For me, this was one of the most apparent improvements within CS4.