View Source Evision.SparseOpticalFlow (Evision v0.1.9)

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cv

Calculates a sparse optical flow.

Calculates a sparse optical flow.

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calc(self, prevImg, nextImg, prevPts, nextPts)

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Calculates a sparse optical flow.

Positional Arguments
  • prevImg: Evision.Mat.

    First input image.

  • nextImg: Evision.Mat.

    Second input image of the same size and the same type as prevImg.

  • prevPts: Evision.Mat.

    Vector of 2D points for which the flow needs to be found.

Return
  • nextPts: Evision.Mat.

    Output vector of 2D points containing the calculated new positions of input features in the second image.

  • status: Evision.Mat.

    Output status vector. Each element of the vector is set to 1 if the flow for the corresponding features has been found. Otherwise, it is set to 0.

  • err: Evision.Mat.

    Optional output vector that contains error response for each point (inverse confidence).

Python prototype (for reference):

calc(prevImg, nextImg, prevPts, nextPts[, status[, err]]) -> nextPts, status, err
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calc(self, prevImg, nextImg, prevPts, nextPts, opts)

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Calculates a sparse optical flow.

Positional Arguments
  • prevImg: Evision.Mat.

    First input image.

  • nextImg: Evision.Mat.

    Second input image of the same size and the same type as prevImg.

  • prevPts: Evision.Mat.

    Vector of 2D points for which the flow needs to be found.

Return
  • nextPts: Evision.Mat.

    Output vector of 2D points containing the calculated new positions of input features in the second image.

  • status: Evision.Mat.

    Output status vector. Each element of the vector is set to 1 if the flow for the corresponding features has been found. Otherwise, it is set to 0.

  • err: Evision.Mat.

    Optional output vector that contains error response for each point (inverse confidence).

Python prototype (for reference):

calc(prevImg, nextImg, prevPts, nextPts[, status[, err]]) -> nextPts, status, err

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calc!(self, prevImg, nextImg, prevPts, nextPts)

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Raising version of calc/5.

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calc!(self, prevImg, nextImg, prevPts, nextPts, opts)

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Raising version of calc/6.