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Make ch3_panorama at least 8x as fast. #9

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Make ch3_panorama at least 8x as fast. #9

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Commits on Jul 13, 2013

  1. Make warp.panorama() much faster. 

    ch3_panorama now runs in less than 1 minute, instead of > 8min (after
which I killed it). The output should be the same as before. Do this by
doing the perspective image mapping using PIL instead of scipy.

Also fix a FIXME about x and y being swapped (since this wasn't
mentioned in the bug, this was pretty confusing to me), since that's no
longer necessary.
    @nico
    nico committed Jul 13, 2013
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  2. simplify; the PIL-based warp can handle color and grayscale images

    @nico
    nico committed Jul 13, 2013
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