Calibrating object sensor devices in a gaming system

Abstract

Various embodiments are provided for calibration of motion player tracking devices in electronic gaming machines (EGMs). A plurality of object sensors positioned adjacently to a display device of the EGM each record a plurality of data frames inclusive of a position of a plurality of fiducial markers relative to the plurality of object sensors. At predetermined intervals, the plurality of object sensors are calibrated in three-dimensional space using the position of the plurality of fiducial markers relative to the plurality of object sensors within the recorded plurality of data frames.

What is claimed is: 
     
         1 . An electronic gaming machine (EGM), comprising:
 a display device;   a plurality of object sensors;   a plurality of fiducial markers;   at least one processor; and   at least one memory device storing a plurality of computer instructions that, when executed by the at least one processor, cause the at least one processor to operate with the display device and the plurality of object sensors to:
 record, by the plurality of object sensors, a plurality of data frames inclusive of a relative position of the plurality of fiducial markers adjacently located to the display device; and 
 calibrate the plurality of object sensors in three-dimensional space using the relative position of the plurality of fiducial markers within the recorded plurality of data frames. 
   
     
     
         2 . The EGM of  claim 1 , wherein the plurality of fiducial markers are positioned adjacent to both a right side and a left side of the display device. 
     
     
         3 . The EGM of  claim 2 , wherein a first one of the plurality of object sensors is positioned adjacent to the right side and a second one of the plurality of object sensors is positioned adjacent to the left side of the display device. 
     
     
         4 . The EGM of  claim 1 , wherein one viewable side of a frustum of each of the plurality of object sensors is substantially parallel to a face of the display device. 
     
     
         5 . The EGM of  claim 3 , wherein a field of view of the first one of the plurality of object sensors overlaps the field of view of the second one of the plurality of object sensors. 
     
     
         6 . The EGM of  claim 3 , wherein the plurality of fiducial markers are positioned such that the first one of the plurality of object sensors observes the plurality of fiducial markers positioned adjacent to the left side exclusive to the second one the plurality of object sensors observing the plurality of fiducial markers positioned adjacent to the right side. 
     
     
         7 . The EGM of  claim 1 , wherein the plurality of object sensors each comprise three-dimensional cameras. 
     
     
         8 . The EGM of  claim 7 , wherein the plurality of fiducial markers are composed of an Infrared (IR) reflective material detectable by the three-dimensional cameras. 
     
     
         9 . The EGM of  claim 8 , wherein recording the plurality of data frames further comprises recording, by the three-dimensional cameras, a predetermined number of video frames at a predetermined frame rate. 
     
     
         10 . The EGM of  claim 1 , wherein calibrating the plurality of object sensors in three-dimensional space further comprises comparing, by the processor, observed positions of each of the plurality of fiducial markers within three coordinate axes to expected positions of each of the plurality of fiducial markers within the three coordinate axes. 
     
     
         11 . The EGM of  claim 10 , wherein difference values between the observed positions and the expected positions are expressed as a rotation matrix, the rotation matrix used by the processor to convert the difference values between the observed positions and the expected positions to a common coordinate system of the display device. 
     
     
         12 . The EGM of  claim 1 , wherein the calibrating is performed at predetermined intervals. 
     
     
         13 . An electronic gaming machine (EGM), comprising:
 a display device configured to display three-dimensional images;   a plurality of object sensors including at least two cameras positioned adjacent to the display device;   a plurality of fiducial markers positioned adjacent to the display device;   at least one processor; and   at least one memory device storing a plurality of computer instructions that, when executed by the at least one processor, cause the at least one processor to operate with the display device and the plurality of object sensors to:
 record, by the plurality of object sensors, a plurality of data frames inclusive of a position of the plurality of fiducial markers relative to the plurality of object sensors; wherein a field of view of a first one of the plurality of object sensors and a second one of the plurality of object sensors overlaps; and 
 calibrate, at predetermined intervals, the plurality of object sensors in three-dimensional space using the position of the plurality of fiducial markers relative to the plurality of object sensors within the recorded plurality of data frames. 
   
     
     
         14 . The EGM of  claim 13 , wherein the plurality of fiducial markers are composed of an Infrared (IR) reflective material and integrated into both a right side and a left side of a bezel mask surrounding the display device. 
     
     
         15 . The EGM of  claim 14 , wherein the first one of the plurality of object sensors is integrated into the bezel mask at a top right side of the display device, and the second one of the plurality of object sensors is integrated into a bezel mask at a top left side of the display device. 
     
     
         16 . The EGM of  claim 13 , wherein the first and the second ones of the plurality of object sensors are each pointed at opposite, bottom corners of the display device and positioned to view the plurality of fiducial markers and at least a portion of a player's body. 
     
     
         17 . The EGM of  claim 13 , wherein the plurality of object sensors each comprise three-dimensional cameras. 
     
     
         18 . The EGM of  claim 13 , wherein calibrating the plurality of object sensors in three-dimensional space further comprises comparing, by the processor, observed positions of each of the plurality of fiducial markers within three coordinate axes to expected positions of each of the plurality of fiducial markers within the three coordinate axes. 
     
     
         19 . The EGM of  claim 18 , wherein difference values between the observed positions and the expected positions are expressed as a rotation matrix, the rotation matrix used by the processor to convert the difference values between the observed positions and the expected positions to a common coordinate system of the display device. 
     
     
         20 . A method for calibrating object sensors in an electronic gaming machine (EGM), by a processor, comprising:
 recording, by a plurality of object sensors positioned adjacently to a display device of the EGM, a plurality of data frames inclusive of a position of a plurality of fiducial markers relative to the plurality of object sensors; wherein a field of view of a first one of the plurality of object sensors and a second one of the plurality of object sensors overlaps; and   calibrating, at predetermined intervals, the plurality of object sensors in three-dimensional space using the position of the plurality of fiducial markers relative to the plurality of object sensors within the recorded plurality of data frames.   
     
     
         21 . The method of  claim 20 , further comprising comparing, by the processor, observed positions of each of the plurality of fiducial markers within three coordinate axes to expected positions of each of the plurality of fiducial markers within the three coordinate axes. 
     
     
         22 . The method of  claim 21 , wherein difference values between the observed positions and the expected positions are expressed as a rotation matrix, the rotation matrix used by the processor to convert the difference values between the observed positions and the expected positions to a common coordinate system of the display device.