1. A method of operating a three-dimensional image sensor, the method comprising:
measuring a distance of an object from the three-dimensional image sensor using light emitted by a light source module, the three-dimensional image sensor including the light source module; and
adjusting an emission angle of the light emitted by the light source module based on the measured distance.
2. The method of claim 1, wherein the measuring comprises:
emitting the light with desired emission angle at the light source module; and
measuring the distance of the object from the three-dimensional image sensor by detecting a time-of-flight of the emitted light.
3. The method of claim 1, wherein the adjusting decreases the emission angle of the light as the distance of the object from the three-dimensional image sensor increases.
4. The method of claim 1, wherein the light source module includes a light source and a lens, and wherein the adjusting adjusts an interval between the light source and the lens based on the measured distance.
5. The method of claim 4, wherein the adjusting moves the light source or the lens such that a separation between the light source and the lens increases as the distance of the object from the three-dimensional image sensor increases.
6. The method of claim 1, wherein the light source module includes a light source and a lens, and wherein the adjusting
adjusts a refractive index of the lens based on the measured distance.
7. The method of claim 6, wherein the adjusting
increases the refractive index of the lens as the distance of the object from the three-dimensional image sensor increases.
8. The method of claim 1, wherein the light source module includes a light source and a lens, and wherein the adjusting
adjusts a curvature of the lens based on the measured distance.
9. The method of claim 8, wherein the adjusting
increases the curvature of the lens as the distance of the object from the three-dimensional image sensor increases.
10. The method of claim 1, further comprising:
adjusting an amplitude of the light emitted by the light source module according to an increment or a decrement of the emission angle of the light.
11. The method of claim 10, wherein the adjusting
decreases the amplitude of the light as the emission angle of the light decreases.
12. A method of operating a three-dimensional image sensor, the method comprising:
obtaining position information of an object using light emitted by a light source module, the three-dimensional image sensor including the light source module having a light source and a lens; and
adjusting a relative position of the light source to the lens based on the obtained position information of the object.
13. The method of claim 12, wherein the position information of the object includes at least one of a distance of the object from the three-dimensional image sensor, a horizontal position of the object, a vertical position of the object and a size of the object.
14. The method of claim 12, wherein the relative position of the light source to the lens includes at least one of an interval between the light source and the lens, a horizontal position of the light source and a vertical position of the light source.
15. The method of claim 12, wherein the position information of the object includes a horizontal position and a vertical position of the object, and wherein the adjusting
moves the light source or the lens such that the object, the lens and the light source are positioned in a straight line.
16. A method of operating an image sensor, the method comprising:
obtaining position information of an object using light emitted by a light source module, the image sensor including the light source module; and
adjusting an emission angle of the light emitted by the light source module based on the obtained position information.
17. The method of claim 16, wherein the obtaining the position information of the object comprises:
emitting the light with a desired emission angle from the light source module; and
measuring a distance of the object from the image sensor by detecting a time-of-flight of the emitted light.
18. The method of claim 17, wherein the adjusting adjusts the emission angle of the light based on the distance of the object from the image sensor.
19. The method of claim 17, wherein the adjusting adjusts the emission angle of the light by adjusting a separation between a light source and a lens based on the measured distance, the light source module including the light source and the lens.
20. The method of claim 17, wherein the adjusting adjusts the emission angle of the light by adjusting a refractive index of a lens included in the light source module based on the measured distance.
21. The method of claim 17, wherein the adjusting adjusts the emission angle of the light by adjusting a curvature of the lens based on the measured distance.
22. The method of claim 17, further comprising:
adjusting an amplitude of the light emitted by the light source module according to an increase or a decrease in the emission angle of the light.
23. The method of claim 17, wherein the measuring at least twice samples light reflected from the object, calculates a phase difference between the emitted and reflected light based on the at least two samples and detects the time-of-flight of the emitted light.
24.-30. (canceled)
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A color correction circuit having at least three color input channel processing circuits, each of said color input channel processing circuits comprising:
an adder with a corrected color channel output, a first multiplied input, a second multiplied input, a third multiplied input and an uncorrected color channel input directly coupling the adder to an output of a color image sensor;
a noise reduction filter having a filter input coupled to said uncorrected color channel input;
an input channel multiplier having an input coupled to an output of said noise reduction filter, an output of said input channel multiplier being coupled to the first multiplied input of said adder; and
at least two further multipliers having inputs respectively coupled to outputs of other noise reduction filters forming part of other color input channel processing circuits, one of said two further multipliers having an output coupled to the second multiplied input and other one of said two further multipliers having an output coupled to the third multiplied input.
2. A color correction circuit as claimed in claim 1, wherein said input channel and two further multipliers have coefficients that when summed together are less than 0.2.
3. A color correction circuit as claimed in claim 1 wherein said input channel and two further multipliers have coefficients that when summed together are substantially zero.
4. A color correction circuit as claimed in claim 1, wherein said input channel and two further multipliers have coefficients that when summed together are less than 1.
5. A color correction circuit as claimed in claim 1 wherein said noise reduction filter is a Low Pass Filter.
6. A color correction circuit having a color image sensor having at least three uncorrected color channel outputs and at least three color input channel processing circuits, each of said color input channel processing circuits comprising:
an adder with a corrected color channel output, a first multiplied input, a second multiplied input, a third multiplied input and an uncorrected color channel input directly coupling the adder to one of the uncorrected color channel outputs;
a noise reduction filter having a filter input coupled to said uncorrected color channel input;
an input channel multiplier having an input coupled to an output of said noise reduction filter, an output of said input channel multiplier being coupled to the first multiplied input of said adder; and
at least two further multipliers having inputs respectively coupled to outputs of other noise reduction filters forming part of other color input channel processing circuits, one of said two further multipliers having an output coupled to the second multiplied input and other one of said two further multipliers having an output coupled to the third multiplied input.
7. A color correction circuit as claimed in claim 6, wherein there is a color interpolation module coupled to said color input channel processing circuits.
8. A color correction circuit as claimed in claim 7, wherein there is a gamma correction module coupled to said color interpolation module.
9. A method of correcting a digital color sampled signal comprising at least three color channels, the channels being a Red Channel, Green Channel and Blue channel, the method comprising the steps of:
filtering uncorrected color sampled signals on each of said color channels to provide filtered channel sampled signals;
multiplying said filtered channel sampled signals with selected coefficients to provide noise reduced signal samples of said uncorrected color sampled signals; and
adding each of said uncorrected color sampled signals to selected said noise reduced signal samples to provide a corrected color sampled signal, wherein the coefficients when summed together are less than 0.2.
10. A method of correcting a digital color sampled signal as claimed in claim 9, wherein said coefficients used for said multiplying when summed together are substantially zero.
11. A method of correcting a digital color sampled signal as claimed in claim 9, said method being further characterised by performing the following expression:
R
c
G
c
B
c
=
1
0
0
0
1
0
0
0
1
\u2061
R
G
B
+
c
11
c
12
c
13
c
21
c
22
c
23
c
31
c
32
c
33
\u2061
R
_
G
_
B
_
Wherein, Rc, Gc and Bc are respective color corrected samples of the uncorrected color sampled signals R,G,B; {overscore (R)},{overscore (G)},{overscore (B)} are respective filtered channel sampled signals of the uncorrected color sampled signals R,G,B; and C11 to C33 are the coefficients with values less then 1.
12. A method of correcting a digital color sampled signal as claimed in claim 11, wherein the coefficients C11, C22 and C33 are positive.