"Print-Worthy" Frame Grabs

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I One of the most common requests I hear is the desire to take frame grabs from video and format them for use in print, j Unfortunately, the mediums just don't mix very well. Remember, in order to capture between 24 to 30 frames per second, a small \ image is grabbed. Depending on your format, you end up with around 640x480 square pixels of information. If you condense these ^ pixels to a print resolution of say 300 ppi, you get a print size of about 2x1.5 inches—slightly larger than a postage stamp, but not ^ very useful for most printing jobs.

In Photoshop, we can "up-rez" an image through the Image Size command (lmage>lmage Size). Since this information does not f currently exist, the computer will attempt to interpolate the information. I recommend that you switch pixel dimensions to percent, I and then up-rez exactly 200% using the nearest neighbor interpolation method. Are the results great? No. But they are acceptable for some uses. You should consider taking the image to a service bureau and getting it outputted on a dye-sublimation printer, which produces photolike output from smaller resolution files.

An excellent Photoshop plug-in called Genuine Fractals uses advanced processing to generate high-quality files from low-quality sources. You can find out more information at http://www.ononesoftware.com.

Superblack (aka, Zero Black)

ifi A pure luma value of 0 fQi IRE, which falls below the legal limit of 7.5 IRE for NTSC broadcasting. It is often used for luma-keying, a process of transparency generation that would not tie up a second channel of a switcher (for the matte) in order to perform a key.

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