Abstract: Step detection methods and apparatus are described. According to one aspect, a footstep detection method includes obtaining accelerometer data regarding movements of a user device, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user, after the filtering, analyzing individual ones of a plurality of cycles of the accelerometer data to determine whether any of the individual cycles corresponds to a user taking a footstep with the user device, and as a result of the analyzing, indicating at least one of the individual cycles as corresponding to the user taking a footstep.

Abstract: Step detection methods and apparatus are described. According to one aspect, a footstep detection method includes obtaining accelerometer data regarding movements of a user device, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user, after the filtering, analyzing individual ones of a plurality of cycles of the accelerometer data to determine whether any of the individual cycles corresponds to a user taking a footstep with the user device, and as a result of the analyzing, indicating at least one of the individual cycles as corresponding to the user taking a footstep.

Abstract: Virtual model navigation methods and apparatus are described.

Abstract: Virtual model viewing methods and apparatus are described. According to one aspect, a virtual model viewing method includes using a user device, accessing model data which may be used to generate a plurality of views of a virtual model, using a camera of the user device, generating image data of content of the physical world, and using the model data and the image data, creating one of the views of the virtual model which comprises at least some of the content of the physical world, and displaying the one view of the virtual model using a display screen of the user device.

Abstract: Virtual model navigation methods and apparatus are described. According to one aspect, a virtual model navigation method includes using a display screen of a user device, displaying a plurality of views of a virtual model in a plurality of frames, wherein the displaying comprises displaying one of the views in one of the frames with the virtual camera positioned at a first view point within a virtual scene of the virtual model, after the displaying the one of the views, detecting movement of the user device from a first location in the physical world at the first moment in time to a second location in the physical world at a second moment in time, and wherein the displaying comprises displaying another of the views in another of the frames with the virtual camera positioned at a second view point within the virtual scene as a result of the detection of the movement of the user device.

Abstract: Step detection methods and apparatus are described. According to one aspect, a footstep detection method includes obtaining accelerometer data regarding movements of a user device, filtering the accelerometer data to remove frequencies above a typical stepping frequency range of a user, after the filtering, analyzing individual ones of a plurality of cycles of the accelerometer data to determine whether any of the individual cycles corresponds to a user taking a footstep with the user device, and as a result of the analyzing, indicating at least one of the individual cycles as corresponding to the user taking a footstep.

Abstract: Virtual model navigation methods and apparatus are described.

Abstract: Virtual model navigation methods and apparatus are described. According to one aspect, a virtual model navigation method includes using a display screen of a user device, displaying a plurality of views of a virtual model in a plurality of frames, wherein the displaying comprises displaying one of the views in one of the frames with the virtual camera positioned at a first view point within a virtual scene of the virtual model, after the displaying the one of the views, detecting movement of the user device from a first location in the physical world at the first moment in time to a second location in the physical world at a second moment in time, and wherein the displaying comprises displaying another of the views in another of the frames with the virtual camera positioned at a second view point within the virtual scene as a result of the detection of the movement of the user device.

Abstract: Virtual model viewing methods and apparatus are described. According to one aspect, a virtual model viewing method includes using a user device, accessing model data which may be used to generate a plurality of views of a virtual model, using a camera of the user device, generating image data of content of the physical world, and using the model data and the image data, creating one of the views of the virtual model which comprises at least some of the content of the physical world, and displaying the one view of the virtual model using a display screen of the user device.