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12
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edited Sep 21 2011 at 22:35
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Decomposing max-convolution of sum of functions ?
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11
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edited Sep 21 2011 at 3:21
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $ (edit: if it makes analysis any easier, we can assume $0\leq w_i \leq 1$)
Now, max-convolution (also called morphological dilation) in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :y$):
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
For example, $D_R(x,y) = \tilde{w_1} D_{F_1}(x,y) + \tilde{w_2} D_{F_2}(x,y) + \tilde{w_3} D_{F_3}(x,y)$ for all $x$ and for all $y$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
I think the ingredients should be $D_{F_1}, D_{F_2}, D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3 $. Please note that the discount terms $d_1, d_2, d_3$ are included.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this decomposition problem? If there isn't any closed form decomposition, what would be a tight approximation?
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10
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edited Sep 20 2011 at 8:42
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution (also called morphological dilation) in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
For example, $D_R(x,y) = \tilde{w_1} D_{F_1}(x,y) + \tilde{w_2} D_{F_2}(x,y) + \tilde{w_3} D_{F_3}(x,y)$ for all $x$ and for all $y$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, D_{F_1}, D_{F_2}, D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$d_3 $. Please note that the discount terms $d_1, d_2, d_3$ are included.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this decomposition problem? If there isn't any closed form decomposition, what would be a tight approximation?
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9
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edited Sep 20 2011 at 2:12
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution (also called morphological dilation) in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
For example, $D_R(x,y) = \tilde{w_1} D_{F_1}(x,y) + \tilde{w_2} D_{F_2}(x,y) + \tilde{w_3} D_{F_3}(x,y)$ for all $x$ and for all $y$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that the discount terms $d_1, d_2, d_3$ are included.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this decomposition problem? If there isn't any closed form decomposition, what would be a good tight approximation?
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8
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edited Sep 19 2011 at 7:00
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution (also called morphological dilation) in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
Upon numerical simulations with random matrices,
I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that I've included the discount terms $d_1, d_2, d_3$ are included.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem? If there isn't any closed form decomposition, what would be a good approximation?
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7
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edited Sep 19 2011 at 6:49
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution (also called morphological dilation) in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
Upon numerical simulations with random matrices, I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that I've included the discount terms $d_1, d_2, d_3$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem? If there isn't any closed form decomposition, what would be a good approximation?
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6
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edited Sep 19 2011 at 6:41
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution in our problem is defined as follows using $L_1$ and $L_2$ norms where $x$ and $y$ are indices for rows and columns of $R$, and ($dx$, $dy$) are deviations from specific ($x$, $y$) :
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |dx| - d_2 |dy| - d_3(dx)^2 - d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
Upon numerical simulations with random matrices, I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that I've included the discount terms $d_1, d_2, d_3$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem? If there isn't any closed form decomposition, what would be a good approximation?
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5
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edited Sep 19 2011 at 6:19
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution in our problem is defined as follows using $L_1$ and $L_2$ norms:
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |x-dx| dx| - d_2 |y-dy| dy| - d_3(x-dx)^2 d_3(dx)^2 - d_4(y-dy)^2 d_4(dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
Upon numerical simulations with random matrices, I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that I've included the discount terms $d_1, d_2, d_3$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem? If there isn't any closed form decomposition, what would be a good approximation?
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4
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edited Sep 19 2011 at 6:06
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max-convolution of sum of functions ?
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3
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edited Sep 19 2011 at 5:57
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 \leq w_i \leq 1 $
Now, max-convolution in our problem is defined as follows using $L_1$ and $L_2$ norms:
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d_1 |x-dx| - d_2 |y-dy| - d_3(x-dx)^2 - d_4(y-dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation here for coming up with this problem is that we have a lot of $R$ matrices which can be written as linear combinations of $F_1, F_2, F_3$. Then my the intuition is that we can save a lot of computations by running the expensive max-convolutions only three times (rather than thousand times) and then reconstruct $D_R$ from some weighted combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
Upon numerical simulations with random matrices, I think the ingredients should be $D_{F_1}$, $D_{F_2}$, $D_{F_3}, F_1, F_2, F_3, w_1, w_2, w_3, d_1, d_2, d_3$. Please note that I've included the discount terms $d_1, d_2, d_3$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem? If there isn't any closed form decomposition, what would be a good approximation?
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2
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edited Sep 19 2011 at 5:52
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Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100.
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 <= \leq w_i <= \leq 1 $
Now, max-convolution in our problem is defined as follows using $L_1$ and $L_2$ norms:
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d1 d_1 |x-dx| - d2 d_2 |y-dy| - d3(x-dx)^2 d_3(x-dx)^2 - d4(y-dy)^2 d_4(y-dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation here is that we have a lot of $R$ matrices which can be written as linear combinations of $F1, F2F_1, F_2, F3$F_3$. Then my intuition is that we can save a lot of computations by running expensive max-convolutions only three times and then reconstruct $D_R$ from some combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem?
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1
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asked Sep 19 2011 at 5:45
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max-convolution of sum of functions
Hello.
$R, F_1, F_2, F_3$ are random (not-convex, not-concave) 2D matrices of size 100x100
$R$ is a linear combination of $F_1, F_2, F_3$.
Explicitly, $R = w_1 F_1 + w_2 F_2 + w_3 F_3$
where $w_1, w_2, w_3$ are real numbers $ -1 <= w_i <= 1 $
Now, max-convolution is defined as follows
$D_R(x,y) = \max_{dx,dy} \left( R(x+dx, y+dy) - d1 |x-dx| - d2 |y-dy| - d3(x-dx)^2 - d4(y-dy)^2 \right)$
The question here is if we can express the above max-convolution $D_R$ as weighted sum of max-convolutions of $F$ 's, namely, $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
The motivation here is that we have a lot of $R$ matrices which can be written as linear combinations of $F1, F2, F3$. Then my intuition is that we can save a lot of computations by running expensive max-convolutions only three times and then reconstruct $D_R$ from some combinations of $D_{F_1}$, $D_{F_2}$, $D_{F_3}$.
I'm not sure if this is a known problem because I couldn't find a similar result from google search. Does anyone have an idea on how to approach this problem?
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