Plenoptic foveated camera
View Patent ↗A sensor 4 targeted to be mounted on a plenoptic camera comprises at least one microimage area targeted to sense a microimage refracted by a microlens array, the microimage area being at least partially covered by a color filter array, wherein the color saturation of the color filter array decreases when getting away from a centroid (x i,j , y i,j ) of the microimage area.
1. A sensor targeted to be mounted on a plenoptic camera, the sensor comprising:
at least one microimage area targeted to sense a microimage refracted by a microlens array, wherein the microimage area is only partially covered by a color filter array, wherein the color saturation of the color filter array decreases when getting away from a centroid (x i,j , y i,j ) of the microimage area, and wherein the color filter array only covers a 4*4 pixels area at the centroid (x i,j , y i,j ) of the microimage area.
2. The sensor according to claim 1 , wherein the centroid of the color filter array corresponds to the centroid (x i,j , y i,j ) of the microimage area.
3. The sensor according to claim 1 , wherein the color saturation of the color filter array decreases from the centroid (x i,j , y i,j ) of the microimage area to the border of the microimage area.
4. The sensor according to claim 1 , wherein the color saturation of the color filter array varies from 1 at the centroid (x i,j , y i,j ) of the microimage area to 0 nearby the border of the microimage area.
5. The sensor according to claim 4 , wherein the color filter array is a Bayer filter and the color components are given in HSV color space:
{
R
(
0
°
,
max
(
1
-
2
(
x
-
x
i
,
j
)
p
,
1
-
2
(
y
-
y
i
,
j
)
p
)
,
1.0
)
HSV
G
(
120
°
,
max
(
1
-
2
(
x
-
x
i
,
j
)
p
,
1
-
2
(
y
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y
i
,
j
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p
)
,
1.0
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HSV
B
(
240
°
,
max
(
1
-
2
(
x
-
x
i
,
j
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p
,
1
-
2
(
y
-
y
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j
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HSV
where (x, y) are the coordinates of a pixel below the microlens (i,j), (x i,j , y i,j ) are the coordinates of the centroid of the microlens image area and p is the distance between the respective centers (x i,j , y i,j ) of two adjacent microimage areas.
6. A method for determining at least one refocused image color component R x of a microimage area partially covered by a color filter array, comprising:
determining a refocused image R a,b of microimage area pixels (i,j) covered by the color filter array, wherein the color saturation of the color filter array decreases when getting away from a centroid (x i,j , y i,j ) of the microimage area;
determining a refocused image R T of the microimage area pixels (i,j) not covered by the color filter array;
determining the color component R x by combining the refocused image R a,b and the refocused image R T ;
wherein determining implements a weight (W) on the refocused image R T .
7. A light-field data acquisition device comprising a sensor, the sensor comprising:
at least one microimage area targeted to sense a microimage refracted by a microlens array, wherein the microimage area is only partially covered by a color filter array,
wherein the color saturation of the color filter array decreases when getting away from a centroid (x i,j , y i,j ) of the microimage area, and
wherein the color filter array only covers a 4*4 pixels area at the centroid (x i,j , y i,j ) of the microimage area.
8. A non-transitory computer-readable medium comprising a computer program product recorded thereon and capable of being run by a processor, including program code instructions for implementing a method according to claim 6 .