Image rendering and event pan/crop

MooseTrax wrote on 2/25/2006, 9:48 AM

i have been trying to use Photoshop files for titles. In the 100% mode they look fine, but when i try to enlarge them for zoom effects, i'm getting jaggies on the edges. is there any way to negate these jaggies, other then creating a single file for each frame?

Comments

David Jimerson wrote on 2/25/2006, 10:01 AM

At what resolution are are you exporting the Photoshop files? The DV timelines (assuming NTSC) are 720x480. If you want to zoom in, I'd suggest at LEAST twice that.

johnmeyer wrote on 2/25/2006, 10:22 AM

For images, DO NOT use the Track controls to zoom; ALWAYS use the event pan/crop. Otherwise, you will get terrible jaggies. The reason? Track controls work on the still image AFTER it has been resampled down to project resolution (720x480 for NTSC DV). By contrast, pan/crop first samples the still image at the zoom ratio you request and THEN downsamples to project resolution. Thus, if you have a high resolution still, if you use the EVENT pan/crop, you can zoom way in and not see any jaggies at all.

MooseTrax wrote on 2/25/2006, 3:06 PM

i've been saving at 720 x 480 but at 300dpi. i'll try to save larger and see if that helps.

johnmeyer wrote on 2/25/2006, 7:40 PM

The dpi (300 dpi) won't guarantee any specific number of pixels. If you scan a 4x6 print at 300 dpi, you'll get (300x4) x (300x6) = 1200x1800 pixels. Thus, the smaller the original (like a 35mm negative), the higher the dpi needed to achieve the pixels needed to make it look good.

In general, scan at a resolution that will result in about 20% more pixels than 720x480, and then multiply this by the maximum zoom you expect to create in Vegas for this picture. Thus, if you want to zoom in by a factor of 2, you'll want a scan of something around 1800x1200 pixels.