@@ -23,7 +23,7 @@ For clear, deep, and mathematically correct explanations, please refer to
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incomplete description of the considered Energy and minimization problem, but
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it is enough to intuitively describe it.
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- We look for solutions in the space of dynamic Radon measures, these are
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+ We look for ** solutions** in the space of ** dynamic Radon measures** , these are
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[ Radon measure] ( https://en.wikipedia.org/wiki/Radon_measure ) defined on
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time and space ` [0,1] x Ω ` .
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@@ -52,45 +52,45 @@ Since measure spaces are in particular vector spaces, given a family of weights
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ω<sub >i</sub > >0, and a family of curves γ<sub >i</sub >, we can now consider μ,
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a weighted sum of these transported Dirac deltas
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<p align =" center " >
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- <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_5.gif " width =" 800 " >
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+ <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_5.gif " width =" 700 " >
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</p >
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which is also a dynamic Radon measure.
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The measures are "moving time continuously", but the measurements are gathered
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by sampling discretely in time. Fix those time samples as 0 = t<sub >0</sub > <
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t<sub >1</sub > < ... < t<sub >T</sub > = 1, then, at each time sample, the
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considered dynamic Radon measures are simply Radon measures. We therefore
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- consider at each of these time samples t<sub >i</sub >, a forward operator
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- mapping from the space of Radon measures, into some data space H<sub >i</sub >
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+ consider at each of these time samples t<sub >i</sub >, a ** forward operator**
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+ mapping from the space of Radon measures, into some ** data space** H<sub >i</sub >
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<p align =" center " >
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- <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_6.gif " width =" 300 " >
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+ <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_6.gif " width =" 250 " >
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</p >
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Where at each time sample t<sub >i</sub >, the respective data spaces
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H<sub >i</sub > are allowed to be different. Theoretically, these data spaces
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are real [ Hilbert spaces] ( https://en.wikipedia.org/wiki/Hilbert_space ) , numerically,
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these need to be finite dimensional.
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- Given data gathered at each time sample f<sub >0</sub > ∈ H<sub >0</sub >,
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+ Given ** data** gathered at each time sample f<sub >0</sub > ∈ H<sub >0</sub >,
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f<sub >1</sub > ∈ H<sub >1</sub >, ... f<sub >T</sub > ∈ H<sub >T</sub >, and given
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any dynamical Radon measure ν, the data discrepancy term of our minimization
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problem is
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<p align =" center " >
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- <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_7.gif " width =" 400 " >
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+ <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_7.gif " width =" 350 " >
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</p >
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And putting together the data discrepancy term with the proposed
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energy J<sub >α, β</sub > to minimize, we build up the target
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functional that is minimized by our algorithm.
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<p align =" center " >
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- <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_1.gif " width =" 500 " >
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+ <img src =" https://github.com/panchoop/DGCG_algorithm/blob/assets/tex/eq_1.gif " width =" 600 " >
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</p >
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- The energy J<sub >α, β</sub > will promote sparse solutions μ, and the proposed
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- algorithm will return one such measure.
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+ The energy J<sub >α, β</sub > will promote sparse dynamic measures μ, and the
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+ proposed algorithm will return one such measure.
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To see an animated example of Dynamic sources, measured data, and obtained reconstructions,
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please see [ this video] ( https://www.youtube.com/watch?v=daKkJZH3WD4 ) .
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