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View Full Version : Need good software to capture images from DV


andy2004
5th November 2004, 00:28
Hi,
I have used DVgate to capture images from DV camera. It works fine but the resolution is too small 640x480. I need another software to capture crisp and clean pictures with better resolution. Any recommendations?
Thanks

jggimi
5th November 2004, 14:03
Based on the resulting size of your captured images (648x480), I assume your DV images are NTSC. The resolution of NTSC DV video is 720x480, but the pixels are not square, as required on a PC monitor. DV has a Display Aspect Ratio (DAR) of 4:3, or in some cases, 16:9.

To correct the shape to match a standard TV (or PC monitor), the images must be resized to 4:3 -- in square pixels, that usually means 640x480, which keeps the vertical resolution unchanged.

But DV video is interlaced -- which may be why the image doesn't look "crisp" to you. Deinterlacing blends or interpolates to produce a progressive image without artifacts. Do you think this might be your problem? To see examples of interlaced frames, and the results of some deinterlacing methods, check out the images on the main web page at www.100fps.com

I suppose you could take the 720x480 resolution and resize to 720x540, which would keep the horizontal resolution unchanged, and resize the vertical to get 4:3. But since resizing above 100% it doesn't add additional image information, it's certainly not a common methodology.