Method and apparatus for touchless calibration
First Claim
Patent Images
1. A method for calibrating touchless sensory controls of a mobile device, comprising:
- detecting a first button press;
determining if the first button press is held down within a time duration; and
if so, granting touchless control of the mobile device if the button press is held down within the time duration,else, starting a range calibration of the mobile device for touchless control if the button press is held down longer than the time duration,wherein the range calibration comprises;
tracking a first full radial range of touchless finger tip movement corresponding to a left-right radial finger tip track within a virtual coordinate system of a touchless sensory field with respect to a stationary origin of the finger tip movement during the first full radial range;
aligning the first full radial range corresponding to a left-right radial finger tip track with a X principal axis of the virtual coordinate system;
tracking a second full radial range of touchless finger tip movement corresponding to an up-down radial finger tip track within the virtual coordinate system of the touchless sensory field with respect to the stationary origin of the finger tip movement during the second full radial range;
aligning the second full radial range of the up-down radial finger tip track with a Y principal axis of the virtual coordinate system;
mapping both the X principal and Y principal axes of the virtual coordinate system to principal axes of a device coordinate system of a display of the mobile device,wherein the range calibration establishes how a user'"'"'s hand or finger is oriented with respect to its stationary origin relative to a touchless sensing unit producing the touchless sensing field and maps the principal axes to the display according to the orientated hand or finger,wherein one or more range calibrations of differing hand orientations at differing origin locations permit respective alignment of the same X and Y principal axes with the device coordinate system to support different touchless user interface control mappings.
1 Assignment
0 Petitions
Accused Products
Abstract
A touchless sensing unit (110) and method (210) for calibrating a mobile device for touchless sensing is provided. The method can include evaluating (214) a finger movement within a touchless sensory space (101), estimating (216) a virtual coordinate system (320) from a range of finger movement, and mapping (218) the virtual coordinate system to a device coordinate system (330).
-
Citations
18 Claims
-
1. A method for calibrating touchless sensory controls of a mobile device, comprising:
-
detecting a first button press; determining if the first button press is held down within a time duration; and if so, granting touchless control of the mobile device if the button press is held down within the time duration, else, starting a range calibration of the mobile device for touchless control if the button press is held down longer than the time duration, wherein the range calibration comprises; tracking a first full radial range of touchless finger tip movement corresponding to a left-right radial finger tip track within a virtual coordinate system of a touchless sensory field with respect to a stationary origin of the finger tip movement during the first full radial range; aligning the first full radial range corresponding to a left-right radial finger tip track with a X principal axis of the virtual coordinate system; tracking a second full radial range of touchless finger tip movement corresponding to an up-down radial finger tip track within the virtual coordinate system of the touchless sensory field with respect to the stationary origin of the finger tip movement during the second full radial range; aligning the second full radial range of the up-down radial finger tip track with a Y principal axis of the virtual coordinate system; mapping both the X principal and Y principal axes of the virtual coordinate system to principal axes of a device coordinate system of a display of the mobile device, wherein the range calibration establishes how a user'"'"'s hand or finger is oriented with respect to its stationary origin relative to a touchless sensing unit producing the touchless sensing field and maps the principal axes to the display according to the orientated hand or finger, wherein one or more range calibrations of differing hand orientations at differing origin locations permit respective alignment of the same X and Y principal axes with the device coordinate system to support different touchless user interface control mappings. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for calibrating a mobile device for touchless control, comprising:
-
evaluating two full range finger movements within a touchless sensory space each maximally wide across a full radial range of finger motion; and associating first and second finger movements with at least one calibration range of touchless control for the mobile device, wherein the associating calibrates the touchless control with the at least one finger movement, where the calibrating includes tracking a first full radial range of touchless finger tip movement corresponding to a left-right radial finger tip track within a virtual coordinate system of the touchless sensory field with respect to a stationary origin of the finger tip movement during the first full radial range; aligning the first full radial range corresponding to a left-right radial finger tip track with a X principal axis of the virtual coordinate system; tracking a second full radial range of touchless finger tip movement corresponding to an up-down radial finger tip track within the virtual coordinate system of the touchless sensory field with respect to the stationary origin of the finger tip movement during the second full radial range; aligning the second full radial range of the up-down radial finger tip track with a Y principal axis of the virtual coordinate system; mapping both the X principal and Y principal axes of the virtual coordinate system to a device coordinate system of a display of the mobile device, wherein the range calibration establishes how a user'"'"'s hand or finger movement is oriented with respect to its origin location relative to a touchless sensing unit producing the touchless sensing field and the mapping of the principal axes to the display, wherein one or more range calibrations of differing hand orientations at differing origin locations permit respective alignment of the same X and Y principal axes to support different touchless user interface control mappings. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A touchless unit communicatively coupled to a mobile device, comprising:
a plurality of sensors for; evaluating two full range finger movements within a touchless sensory field each maximally across a full radial range of finger motion; and associating the two full range finger movements with at least one control of the mobile device for calibrating a touchless control of the mobile device, by ultrasonic tracking a first and second full radial range of touchless finger tip movement within a virtual coordinate system of the touchless sensory field with respect to a stationary origin of the finger tip movement during the first and second full radial range; respectively aligning the first full radial range and second full radial range with a X and Y principal axis of the virtual coordinate system; estimating an elliptical trajectory of the virtual coordinate system from a full rotational range of finger movement with respect to the stationary origin; translating a circumferential boundary of the elliptical trajectory through an affine transformation to determine the stationary origin; mapping the X principal and Y principal axes of the virtual coordinate system to a device coordinate system of a display of the mobile device according to the stationary origin and respective first and second full radial range of finger movement along the X and Y principal axes, wherein the calibrating establishes how a user'"'"'s hand or finger movement is oriented with respect to its stationary origin relative to a touchless sensing unit producing the touchless sensory field and the mapping of the virtual coordinate system to the device coordinate system. - View Dependent Claims (18)
Specification