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 | 1 | initial version |
It is not a bug. GPU SURF doesn't support small image size. This assert checks that input image has proper size.
| | 2 | No.2 Revision |
It is not a bug. GPU SURF doesn't support small image size. This assert checks that input image has proper size.
UPDATE
Why min_margin is always 11?
sizeo(oct, layer) = (9 + 6*layer) << oct = (9 + 6*layer)*(2^oct)
sizeo(oct - 1, 2) = (9 + 6*2)*(2^(oct - 1)) = 21 * (2^(oct - 1))
sizeo(oct - 1, 2) >> 1 = sizeo(oct - 1, 2) / 2 = 21 * (2^(oct - 2))
(sizeo(oct - 1, 2) >> 1) >> (oct - 1) = (sizeo(oct - 1, 2) >> 1) * (2^(1 - oct)) = 21 * (2^(oct - 2)) * (2^(1 - oct)) = 21/2=10
getsd(oct) = ((sizeo(oct - 1, 2) >> 1) >> (oct - 1)) + 1 === 11
| | 3 | No.3 Revision |
It is not a bug. GPU SURF doesn't support small image size. This assert checks that input image has proper size.
UPDATE
Why min_margin is always 11?
sizeo(oct, layer) = (9 + 6*layer) << oct = (9 + 6*layer)*(2^oct)
sizeo(oct - 1, 2) = (9 + 6*2)*(2^(oct - 1)) = 21 * (2^(oct - 1))
sizeo(oct - 1, 2) >> 1 = sizeo(oct - 1, 2) / 2 = 21 * (2^(oct - 2))
(sizeo(oct - 1, 2) >> 1) >> (oct - 1) = (sizeo(oct - 1, 2) >> 1) * (2^(1 - oct)) = 21 * (2^(oct - 2)) * (2^(1 - oct)) = 21/2=10
21/2 === 10
getsd(oct) = ((sizeo(oct - 1, 2) >> 1) >> (oct - 1)) + 1 === 11