Back in December `05, I wrote this… (I was told to save it)
Name: Scottgfx
Date: Dec 19, 2005 at 2:38:09 am
Subject: Re: Exporting stills at print resolution
There are a few things to keep in mind. SD video has a different pixel aspect than what a printer is going to need. When I have to take video captures and print them, I have a fairly long process that has to be done in a set order.
1. Take your video capture into Photoshop.
2. Determine if the image NEEDS to be de interlaced, (i.e. Is there motion in the frame?)
If the image has no interlace fringing from motion, there is no need to deinterlace
3. If deinterlacing must be done, it must be done before anything else is done.
Make a copy of the image layer so that you have two identical layers. On the top layer, choose Filter-Deinterlace-Upper Field. On the bottom layer, use the same filter but choose Lower Field. Take the top layers opacity to 50%. As long as there wasn’t too much motion you should have a much cleaner looking frame.
4. If random noise from the camera must be overcome, and there wasn’t too much motion. You can pick extra frame captures adjacent to the first, run the same deinterlace process as above and mix them into the original document. (I’ve done five or six frames together to reduce microwave feed noise with reasonable results.)
5. Now we need to correct pixel aspect. A 720×486 frame is simply scaled to 720×540. With DV footage, I add 6 pixels to the hight of the image with the canvas tool and then do the scale to 540.
6. I usually scale up the image to it’s final print size x 300 or 400 dpi and attempt some more processing.
7. The Median filter is helpful for reducing noise sometimes. Not too much.
8. Unshape Mask can sometimes get back some lost detail.
9. Working in LAB color space sometimes is useful for softening the chroma without affecting the detail.
The main thing is, don’t do it unless you have to. If it’s a video shoot that is staged, you should consider having a still camera on hand for such future needs. If you must use a video capture, scale up the image as little as you have to.
I had to get a ton of video captures preped for our annual Hurricane Guide. I had somewhere over 50 video captures that went into the magazine. I built a Photoshop action that did most of the steps above and also cropped enough of the image to get rid of the blanking. Thankfully, none of the images were printed too large. Some looked pretty good, some looked like video.
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Also, in the same thread, someone else mentioned Genuine Fractals PrintPro…
A really neat plug-in that should be in your toolkit. It could be used in the above workflow.