{"id":1854,"date":"2011-07-27T11:40:40","date_gmt":"2011-07-27T16:40:40","guid":{"rendered":"http:\/\/techcitement.com\/?p=1854"},"modified":"2011-08-02T10:03:55","modified_gmt":"2011-08-02T15:03:55","slug":"tech-tricks-and-tweaks-fun-with-rolling-shutter","status":"publish","type":"post","link":"https:\/\/techcitement.com\/hardware\/tech-tricks-and-tweaks-fun-with-rolling-shutter\/","title":{"rendered":"Tech Tricks And Tweaks: Fun With Rolling Shutter"},"content":{"rendered":"
Mordy Gilden has engineering in his blood. Tech Tricks and Tweaks is a biweekly column in which Mordy seeks out ways to hack, tweak, and otherwise just find interesting new uses for tech, often in ways not originally intended. Oh yeah, and blog about it.<\/em><\/p>\n When it comes to digital video cameras, traditionally high-end models sport a technology called\u00a0CCD (Charge Coupled Device), whereas cell phones and other small consumer devices usually use a different tech, called\u00a0CMOS (Complimentary Metal-Oxide Semiconductor — trying saying that 10 times fast). While there are many limitations to CMOS, their lower cost to produce as well as significantly lower electricity consumption make them ideal for small portable consumer devices. CMOS sensors used to be considered inferior in image quality, but they really have gotten quite a bit better over the years and have even found themselves in some prosumer grade video equipment. However, CMOS sensors do suffer from some technical limitations, and one of the most well known is called rolling shutter.<\/p>\n Rolling shutter refers to the way the chip reads the image one line at a time. In other words, the top of the image is recorded before the bottom is, instead of taking the entire image at once like a CCD does.<\/p>\n What does this mean? Well, if there is very little movement in the video, not much. Record a video out the side of a moving car window though and you notice an obvious skew\/slant of the landscape.<\/p>\n