Hand-counted images of rallies yield significantly smaller numbers cbc.ca 10 points by geox 7 days ago
082349872349872 7 days ago Less accurate, but much less laborious: divide into blocks and estimate crowd density per block by comparison with a set of reference photos (as found in textbooks) of scaled, known densities.
Less accurate, but much less laborious: divide into blocks and estimate crowd density per block by comparison with a set of reference photos (as found in textbooks) of scaled, known densities.