by tahart » Fri Apr 08, 2005 6:41 pm
The problem with most capture cards and software is that they're designed to grab frames at the system resolution or 72 dpi, making them useless for seeing any details, especially with low-quality surveillance camera VHS video. VideoFocus and some other apps and/or hardware can create 300 dpi digital images from the analog VHS frames as well as do demulitplexing... Then in Photoshop you can use Shadow/Highlight, Healing Brush, etc., to bring out the details and remove any remaining video artifacts. So if you capture at 72 dpi, no amount of manipulation will bring out the details, you have to capture more data for each frame, or combine them programmatically, then you will have something to work with.