{"id":361,"date":"2011-01-18T11:04:20","date_gmt":"2011-01-18T19:04:20","guid":{"rendered":"http:\/\/coldstreams.com\/video\/?p=361"},"modified":"2011-01-18T11:04:20","modified_gmt":"2011-01-18T19:04:20","slug":"aliasing-and-moire","status":"publish","type":"post","link":"https:\/\/coldstreams.com\/3d\/2011\/01\/18\/aliasing-and-moire\/","title":{"rendered":"“Aliasing” and “Moire”"},"content":{"rendered":"

The new “HDSLRs” do a fine job of shooting very nice HD video. But almost all are plagued by several problems that can ruin a good shot.<\/p>\n

These problems are “rolling shutter” (previously written about on this blog), and “aliasing” and “moire”. Aliasing tends to introduce fake detail into an image, fooling people in to thinking its a sharper image than it really is – because its fake. Moire produces bizarre color patterns wherever there are narrowly spaced, using horizontal lines in the image.<\/p>\n

This Barry Green article is the best explanation I’ve seen for explaining and illustrating the aliasing and moire problems with DSLRs shooting video:\u00a0 DVXuser.com – Articles<\/a>.<\/p>\n

A great visual example of a moire pattern showing up in a real life situation is this video clip – about 30 seconds long. Just look at the roof of the hotel and watch all the false color shimmering going on. This example was shot on a Canon DSLR.<\/p>\n

<\/param><\/param><\/param><\/embed><\/object><\/p>\n

Here’s another example – look at the sofa cushions:<\/p>\n