Object

toolkit.solvers

ScreenedPoissonSolver

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object ScreenedPoissonSolver extends libcog.Logarithm

Solves the screened Poisson equation in the Fourier domain. See the paper "Fourier analysis of the 2D screened Poisson equation for gradient domain problems," by Bhat, Curless, Cohen and Zitnick, 2008.

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Logarithm, AnyRef, Any
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  1. final def !=(arg0: Any): Boolean

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  2. final def ##(): Int

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  3. final def ==(arg0: Any): Boolean

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  4. def apply(imageFFT: libcog.ComplexField, gradient: libcog.VectorField, lambda: Float): libcog.ComplexField

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    Integrate a gradient field subject to the constraint of matching a reference image field as closely as possible.

    Integrate a gradient field subject to the constraint of matching a reference image field as closely as possible. Since this is impossible in general, there is a tradeoff term, lambda, which allows one to balance fidelity to the reference image (larger lambda) and the gradient (smaller lambda).

    imageFFT

    The "periodized" FFT of the reference image field which we want to match as best we can. See the paper "Periodic plus Smooth Image Decomposition," Journal of Mathematical Imaging and Vision, vol 39:2, pp. 161-179, 2011, for a description of the periodic FFT.

    gradient

    The desired gradient field to be integrated.

    lambda

    Tradeoff between fidelity to image (larger value) and integrated gradient (smaller value).

    returns

    Fourier transform of image which best satisfies the given constraints.

  5. final def asInstanceOf[T0]: T0

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  6. def clone(): AnyRef

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  9. def finalize(): Unit

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  10. final def getClass(): Class[_]

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  11. def hashCode(): Int

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  12. final def isInstanceOf[T0]: Boolean

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  13. def isPowerOf2(value: Float): Boolean

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  14. def log2(value: Float): Float

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  15. final def ne(arg0: AnyRef): Boolean

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  16. final def notify(): Unit

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  18. def roundDownPowerOf2(value: Float): Int

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  19. def roundUpPowerOf2(value: Float): Int

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  20. final def synchronized[T0](arg0: ⇒ T0): T0

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Inherited from Logarithm

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