...That is because to ensure an accurate count, some computerized systems require multiple cameras, to get high-resolution images of many parts of the crowd, in case density varies. "I don't know of real technological solutions for this problem," said Nuno Vasconcelos, associate professor of electrical and computer engineering at the University of California, San Diego. "You will have to go with the 'photograph and ruler' gurus right now. Interestingly, this stuff seems to be mostly of interest to journalists. The funding agencies for example, don't seem to think that this problem is very important. For example, our project is more or less on stand-by right now, for lack of funding."
Without any such camera setup, many have turned to some of the companies that collect terrestrial images using satellites, but these companies have collected images mostly before and after the peak of protests this week. "GeoEye and its regional affiliate e-GEOS tasked its GeoEye-1 satellite on Jan. 29, 2011 to collect half-meter resolution imagery showing central Cairo, Egypt," GeoEye's senior vice president of marketing, Tony Frazier, said in a written statement. "We provided the imagery to several customers, including Google Earth. GeoEye normally relies on our partners to provide their expert analysis of our imagery, such as counting the number of people in these protests." This image was taken before the big midweek protests...
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