You need to overlap the images you take by about a quarter to a third of the frame so the program is able to align the photos. This is the actual airplane I flew in coming back to California. I took seven hand-held photographs Honolulu International Airport. This photo is an uncropped 6 megapixel photo taken with a Nikon D100. Since the panamoric image of the Hawaiian Airlines 767 above looks so small, I included an image of the nose section of the plane below to give a sense of scale. Although you can manually adjust misaligned overlaps within DoubleTake, it was not necessary for this image. DoubleTake was able to automatically align all the photos very precisely. The following image was produced by taking seven D100 photos and combining them, resulting in a 17 megapixel image. It doesn’t have all the features and output options of some stitching programs, but what it lacks in complexity, it more than makes up for in ease of use and accurate stitching.ĭoubleTake can take a series of photos that match up horizontally, vertically or even in a matrix grid, match them up and output a single image that for all intents and purposes was taken with a camera with a much higher resolution. I have used numerous photo stitching programs in the past even ones that cost multiple hundreds of dollars, but I’m still impressed with DoubleTake. It’s a handy little shareware gem that does a stellar job of stitching images together to form a huge photograph that’s ideal for printing at up to poster sizes with incredible detail. Well, maybe it really won’t actually turn a D100 into a 17 megapixel camera, but you’ll be able to create images of 17 megapixels or even larger relatively painlessly.Įnter a progrom called DoubleTake for Mac OS X. This environmental factor is a likely contributor to the diminutive material making up Serpent drift.How would you like to turn your 6 megapixel D100 into a 17 megapixel super D100 for less than $20? You can if you use a Macintosh running OS X. However, Earth-based tests cannot duplicate the gravity of Mars, which is one-third that of the gravity on Earth. How did this very fine material manage to accumulate into a drift? Earth-based tests that simulate the wind speed and atmospheric density of Mars have found it difficult to reproduce dunes with grain particles as small as those found in the Serpent drift. The fine grains making up the interior of Serpent drift are no larger than 50 or 60 micrometers (.002 inches) and can be compared to silt on Earth. Smaller particles, like the ones making up Serpent drift, would not necessarily collect into a dune on Earth, but would more likely be distributed across the surface like dust. On Earth, dunes are formed when sand particles of this size are bounced across a surface by wind and collect together as drifts. The grains of sand found within drifts or dunes on Earth are usually about 200 micrometers (.008 inches) in diameter - much like sand on a beach. Most interesting to scientists are the fine grains making up the interior of Serpent drift. These grains lost their dust cover in the process of falling into the scuff, giving scientists clues about the strength - or lack of strength - of the bond between the dust and sand particles. These grains are not natural to the inside of the drift, but are crust particles that have tumbled into the scuffed area as a result of the digging. It captures only the scuffed interior of the Serpent drift and is dominated by larger pea-shaped particles. The image is the first-ever microscopic look inside a drift. NASA's Mars Exploration Rover Spirit took this microscopic imager picture of the drift dubbed 'Serpent' on Spirit's 73rd martian day on Mars after successfully digging into the side of the drift.
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