Imaging device, imaging method, and image processing device generating a complex sensor image
An imaging device includes: a modulator configured to modulate the intensity of light, based on a grating pattern; an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image; a complex sensor image processing unit configured to generate, from the sensor image, a complex sensor image comprising a complex number; and a data transmission unit configured to transmit the complex sensor image.
1. An imaging device comprising;
a modulator configured to modulate an intensity of light, based on a grating pattern;
an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image;
a complex sensor image processing unit configured to generate, from the sensor image, a complex sensor image comprising a complex number; and
a data transmission unit configured to transmit the complex sensor image,
wherein the complex sensor image processing unit generates the complex sensor image, based on the following formula:
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x
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1
2
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I
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x
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exp
(
i
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.
2. The imaging device according to claim 1 , comprising:
a data amount reducing unit configured to reduce a data amount of the complex sensor image.
3. The imaging device according to claim 2 ,
wherein the data amount reducing unit separates the complex sensor image into a real part and an imaginary part to reduce the data amount.
4. The imaging device according to claim 2 ,
wherein the data amount reducing unit separates the complex sensor image into an amplification and a phase to reduce the data amount.
5. The imaging device according to claim 2 ,
wherein the data amount reducing unit determines, based on a maximum value and a minimum value for the complex sensor image, a data range and precision to reduce an output bit rate.
6. The imaging device according to claim 2 ,
wherein the data amount reducing unit determines, based on a distribution standard deviation for the complex sensor image, a data range and precision to reduce an output bit rate.
7. An image processing device configured to communicate with an imaging device,
wherein the imaging device comprises a modulator configured to modulate an intensity of light, based on a first grating pattern, an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image, a complex sensor image processing unit configured to generate, from the sensor image, a complex sensor image comprising a complex number, and a data transmission unit configured to transmit the complex sensor image, and
the image processing device comprises:
a data reception unit configured to receive the complex sensor image; and
an image processing unit configured to restore an image, based on an operation with the complex sensor image and data of a second grating pattern,
wherein the complex sensor image processing unit generates the complex sensor image, based on the following formula
I
CF
(
x
)
=
1
2
∑
Φ
I
F
(
x
)
·
exp
(
i
Φ
)
.
8. The image processing device according to claim 7 ,
wherein the imaging device comprises a data amount reducing unit configured to reduce a data amount of the complex sensor image.
9. The image processing device according to claim 8 ,
wherein the data amount reducing unit separates the complex sensor image into a real part and an imaginary part to reduce the data amount.
10. The image processing device according to claim 8 ,
wherein the data amount reducing unit separates the complex sensor image into an amplification and a phase to reduce the data amount.
11. The image processing device according to claim 8 ,
wherein the data amount reducing unit determines, based on a maximum value and a minimum value for the complex sensor image, a data range and precision to reduce an output bit rate.
12. The image processing device according to claim 8 ,
wherein the data amount reducing unit determines, based on a distribution standard deviation for the complex sensor image, a data range and precision to reduce an output bit rate.
13. An imaging device comprising:
a modulator configured to modulate an intensity of light, based on a first grating pattern;
an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image;
a complex sensor image processing unit configured to generate, from the sensor image, a complex sensor image comprising a complex number; and
an image processing unit configured to restore an image, based on an operation with the complex sensor image and data of a second grating pattern,
wherein the complex sensor image processing unit generates the complex sensor image, based on the following formula
I
CF
(
x
)
=
1
2
∑
Φ
I
F
(
x
)
·
exp
(
i
Φ
)
.
14. An imaging method comprising:
a modulating step of modulating an intensity of light, based on a first grating pattern;
an image generating step of converting the modulated light to electrical signals to generate a sensor image;
a complex sensor image processing step of generating, from the sensor image, a complex sensor image comprising a complex number; and
a data transmitting step of transmitting the complex sensor image,
wherein based on the following formula, the complex sensor image is generated in the complex sensor image processing step
I
CF
(
x
)
=
1
2
∑
Φ
I
F
(
x
)
·
exp
(
i
Φ
)
.
15. The imaging method according to claim 14 , comprising:
an image processing step of restore an image, based on an operation with the complex sensor image and data of a second grating pattern.