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Guan Chun - One of the best experts on this subject based on the ideXlab platform.

  • System and technique for retrieving depth information about a surface by projecting a composite Image of modulated light patterns
    2010
    Co-Authors: Guan Chun, Hassebrook, Laurence G., Lau, Daniel L.
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object, such as an anatomical feature. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the anatomical feature; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face--or other animal feature or inanimate object--recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

  • System and Technique for Retrieving Depth Information About a Surface by Projecting a Composite Image of Modulated Light Patterns
    UKnowledge, 2008
    Co-Authors: Hassebrook, Laurence G., Lau, Daniel L., Guan Chun
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the object; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face—or other animal feature or inanimate object—recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

Lau, Daniel L. - One of the best experts on this subject based on the ideXlab platform.

  • System and technique for retrieving depth information about a surface by projecting a composite Image of modulated light patterns
    2010
    Co-Authors: Guan Chun, Hassebrook, Laurence G., Lau, Daniel L.
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object, such as an anatomical feature. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the anatomical feature; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face--or other animal feature or inanimate object--recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

  • System and Technique for Retrieving Depth Information About a Surface by Projecting a Composite Image of Modulated Light Patterns
    UKnowledge, 2008
    Co-Authors: Hassebrook, Laurence G., Lau, Daniel L., Guan Chun
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the object; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face—or other animal feature or inanimate object—recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

Katja Wiech - One of the best experts on this subject based on the ideXlab platform.

  • the effect of tactile discrimination training is enhanced when patients watch the Reflected Image of their unaffected limb during training
    Pain, 2009
    Co-Authors: Lorimer G Moseley, Katja Wiech
    Abstract:

    In patients with phantom limb pain or complex regional pain syndrome (CRPS), sensory discrimination training increases tactile acuity, normalises cortical reorganisation and decreases pain. In healthy people, sensory cortical response, and tactile acuity, are greater if the participant looks towards the body part being stimulated. Does this effect enhance tactile training in CRPS patients? Ten patients underwent a 30-min tactile discrimination training session under four conditions (order randomised) in a 2 2 design: looking towards or away from the stimulated limb and seeing or not seeing skin. Tactile training imparted long-term improvement in tactile acuity when patients watched the Reflected Image of their unaffected limb in a mirror during training (that is, they looked towards the stimulated body part and could see the skin of the opposite body part in the mirror): two-point discrimination threshold (TPD) was 8 mm less 2 days after training than it was before training ([95% CI = 1.5–14.3 mm], p < 0.001). Although this condition also imparted a greater reduction in resting pain at post-treatment than the other conditions, and change in pain and change in TPD over the session were strongly related (r = 0.83, p < 0.001), there was no residual effect on pain at 2-day follow-up. In the other conditions, tactile acuity had returned to pre-training levels at 2-day follow-up. The results should directly improve management of CRPS, and have implications for rehabilitation of other conditions associated with nervous system injury or disease, for example stroke, in which tactile recovery is a major objective of rehabilitation.

Hassebrook, Laurence G. - One of the best experts on this subject based on the ideXlab platform.

  • System and technique for retrieving depth information about a surface by projecting a composite Image of modulated light patterns
    2010
    Co-Authors: Guan Chun, Hassebrook, Laurence G., Lau, Daniel L.
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object, such as an anatomical feature. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the anatomical feature; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face--or other animal feature or inanimate object--recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

  • System and Technique for Retrieving Depth Information About a Surface by Projecting a Composite Image of Modulated Light Patterns
    UKnowledge, 2008
    Co-Authors: Hassebrook, Laurence G., Lau, Daniel L., Guan Chun
    Abstract:

    A technique, associated system and program code, for retrieving depth information about at least one surface of an object. Core features include: projecting a composite Image comprising a plurality of modulated structured light patterns, at the object; capturing an Image Reflected from the surface; and recovering pattern information from the Reflected Image, for each of the modulated structured light patterns. Pattern information is preferably recovered for each modulated structured light pattern used to create the composite, by performing a demodulation of the Reflected Image. Reconstruction of the surface can be accomplished by using depth information from the recovered patterns to produce a depth map/mapping thereof. Each signal waveform used for the modulation of a respective structured light pattern, is distinct from each of the other signal waveforms used for the modulation of other structured light patterns of a composite Image; these signal waveforms may be selected from suitable types in any combination of distinct signal waveforms, provided the waveforms used are uncorrelated with respect to each other. The depth map/mapping to be utilized in a host of applications, for example: displaying a 3-D view of the object; virtual reality user-interaction interface with a computerized device; face—or other animal feature or inanimate object—recognition and comparison techniques for security or identification purposes; and 3-D video teleconferencing/telecollaboration

N Morio - One of the best experts on this subject based on the ideXlab platform.

  • evidence of relativistic laser beam filamentation in back Reflected Images
    Physical Review E, 2000
    Co-Authors: K Tanaka, M M Allen, A Pukhov, R Kodama, H Fujita, Y Kato, T Kawasaki, Yoneyoshi Kitagawa, Kunioki Mima, N Morio
    Abstract:

    The back-Reflected Image of a 100 TW laser incident on a long scale length plasma is measured. The plasma is deliberately preformed on a solid planar target in a controlled way. Multiple highly intense spots are observed inside the original focal spot. These spots could be the experimental evidence for the laser beam relativistic filamentation in the plasma. Three-dimensional particle-in-cell (PIC) simulations for parameters close to the experimental values are performed. The experimental observations and the filamentation dynamics obtained in the PIC simulations are in a good agreement.