Slashdot Mirror
Chinese Moon Photo Doctored, Crater Moved
mytrip writes "A controversy over last week's photo of the lunar surface, allegedly from China's lunar spacecraft Chang'e, appears to be resolved. It's real but it isn't. An expert says the photo's resolution shows that it is of recent origin. However, for some inexplicable reason, someone on Earth edited the photo and moved a crater to a different location. 'In the week since the picture was released amid much fanfare in Beijing, there have been widespread rumors that the photo was a fake, copied from an old picture collected by a U.S. space probe. The photo from China's Chang'e 1 orbiter is clearly a higher-resolution view, with sunlight streaming from the northwest rather than the north. The mission's chief scientist, Ouyang Ziyuan, told the Beijing News that a new crater had been spotted on the Chang'e imagery — a crater that didn't appear on the US imagery. Lakdawalla determined that the crater in question wasn't exactly new — instead, it appeared to be a crater that had been moved from one spot on the picture to another spot slightly south.'"
SPOILER: It was a poor stitch/blend job.
This guy's the limit!
Bad Astonomy readers are already up to date. It's an error in composition of the picture. Nothing less, nothing more.
Ahhh...the great dumpster continuum. Many a free computer will be found there. -- sowth (748135)
As per the TFA, a mistake was made stitching together 19 separate photographs to produce image of a large area of the moon that the probe could not have captured in one shot. Since each picture is taken at slightly different angle and distance from the surface, some retouching is unavoidable. Otherwise some craters will look like a weird set of arcs with different radius rather than circles. Such stretching got to slightly move some depicted object from their exact position. In fact, it is not possible to produce a flat picture of a 3D object without distortions. Just compare the size and shape of Alaska on your globe as compared to your map.
I would assume that you can request the original mission data for serious research use instead of having to rely on newspaper clippings for science. If those images are also doctored, then we have a genuine controversy.
The original article says and suggests nothing about the photo being "doctored", it's simply a mistake that scientists make all the time. When can we expect a better moderated Slashdot or people who can read?
I realize that it goes against the general Slashdot commenting procedure, but read just a little before commenting on this one, please.
1. Two photos were poorly stitched together, repeating an image of a crater on the combined photo (the crater was photographed twice).
2. Chinese scientists miss the poor stitch job and proclaim they found a new crater.
3. Someone else takes a close look at this "discovery" and points out the error in the stitch job.
The crater wasn't intentionally added, it's a result of trying to align two photos, each taken from a different perspective in which the edges won't completely line up exactly.
Seppuku a.k.a. "Hari Kari" is a japanese tradition.