3D image processing method and apparatus for improving accuracy of depth measurement of an object in a region of interest
First Claim
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1. A three-dimensional (3D) image processing method, comprising:
- determining a Region Of Interest (ROI) in an entire sensing region of a 3D image processing apparatus;
modulating a pulse of an emitted light based on a depth from a reference point in relation to the 3D image processing apparatus to the ROI; and
obtaining a depth image of the ROI using the pulse-modulated emitted lightwherein the determining comprises;
obtaining a depth image in the entire sensing region using the emitted light where an on-time period of the emitted light is Tmax, Tmax being a value obtained by converting a maximum sensing distance of the 3D image processing apparatus into a Time Of Flight (TOF).
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Abstract
Example embodiments relate to a three-dimensional (3D) image processing apparatus and method that may determine a Region Of Interest (ROI) in an entire sensing region of the 3D image processing apparatus, and may obtain a depth image of the ROI. Also, example embodiments may be applied to a surveillance camera system, a motion detection system, a virtual reality simulation system, a distance recognition system for vehicles, a robotic system, a background separation system based on depth information, etc.
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Citations
15 Claims
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1. A three-dimensional (3D) image processing method, comprising:
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determining a Region Of Interest (ROI) in an entire sensing region of a 3D image processing apparatus; modulating a pulse of an emitted light based on a depth from a reference point in relation to the 3D image processing apparatus to the ROI; and obtaining a depth image of the ROI using the pulse-modulated emitted light wherein the determining comprises; obtaining a depth image in the entire sensing region using the emitted light where an on-time period of the emitted light is Tmax, Tmax being a value obtained by converting a maximum sensing distance of the 3D image processing apparatus into a Time Of Flight (TOF). - View Dependent Claims (2, 3, 6, 7)
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4. A three-dimensional (3D) image processing method, comprising:
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determining a Region Of Interest (ROI) in an entire sensing region of a 3D image processing apparatus; modulating a pulse of an emitted light based on a depth from a reference point in relation to the 3D image processing apparatus to the ROI; and obtaining a depth image of the ROI using the pulse-modulated emitted light, wherein the modulating comprises; converting a starting point Z1 and an end point Z2 of the ROI into a Time Of Flight (TOF) T1 and a TOF T2, respectively; and modulating an on-time period of the emitted light into a difference (T2−
T1) between the TOF T2 and the TOF T1.
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5. A three-dimensional (3D) image processing method, comprising:
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determining a Region Of Interest (ROI) in an entire sensing region of a 3D image processing apparatus; modulating a pulse of an emitted light based on a depth from a reference point in relation to the 3D image processing apparatus to the ROI; and obtaining a depth image of the ROI using the pulse-modulated emitted light, wherein the obtaining of the depth image comprises; modulating a duty cycle of a first transfer signal and a duty cycle of a second transfer signal to be identical to a duty cycle of the pulse-modulated emitted light; delaying the duty cycle-modulated first transfer signal by T1, and delaying the duty cycle-modulated second transfer signal by T2, T1 and T2 being obtained by converting a starting point Z1 and an end point Z2 of the ROI into a Time Of Flight (TOF), respectively; and obtaining the depth of the ROI using the duty cycle-modulated first transfer signal which is delayed by T1 and using the duty cycle-modulated second transfer signal which is delayed by T2.
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8. A three-dimensional (3D) image processing apparatus, comprising:
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an image signal processor to determine a Region Of Interest (ROI) in an entire sensing region of the 3D image processing apparatus and to control a pulse of an emitted light based on a depth from a reference point in relation to the image signal processor to the ROI; and a sensor unit to obtain a depth image under control of the image signal processor, wherein the image signal processor controls the sensor unit to obtain the depth image in the entire sensing region using the emitted light where an on-time period of the emitted light is Tmax, Tmax being a value obtained by converting a maximum sensing distance of the 3D image processing apparatus into a Time Of Flight (TOF). - View Dependent Claims (9, 10, 11, 13, 14)
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12. A three-dimensional (3D) image processing apparatus, comprising:
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an image signal processor to determine a Region Of Interest (ROI) in an entire sensing region of the 3D image processing apparatus and to control a pulse of an emitted light based on a depth from a reference point in relation to the image signal processor to the ROI; and a sensor unit to obtain a depth image under control of the image signal processor, wherein the image signal processor controls a light module to modulate the on-time period of the emitted light into a difference (T2−
T1) between T2 and T1 and T2 being obtained by converting a starting point Z1 and an end point Z2 of the ROI into a Time of Flight (TOF), respectively.
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15. A three-dimensional (3D) image processing apparatus, comprising:
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an image signal processor to determine a Region Of Interest (ROI) in an entire sensing region of the 3D image processing apparatus and to control a pulse of an emitted light based on a depth from a reference point in relation to the image signal processor to the ROI; and a sensor unit to obtain a depth image under control of the image signal processor, wherein the sensor unit modulates a duty cycle of a first transfer signal and a duty cycle of a second transfer signal to be identical to a duty cycle of the pulse-controlled emitted light.
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Specification