Systems and methods for measuring delay in representing head motion in a virtual environment

An apparatus comprising:

• one or more processors;
• and
• at least one non-transitory computer readable memory connected to the one or more processors and including computer program code, wherein the at least one non-transitory computer readable memory and the computer program code are configured, with the one or more processors, to cause the apparatus to at least:
• generate a virtual environment for a head mounted display (HMD) mounted to a model head on a test stand, wherein the virtual environment comprises at least a first shape and a second shape, wherein the first shape is a sphere surrounding a first virtual viewpoint and the second shape is a shape that precisely fills a virtual field of view from the first virtual viewpoint, and the first virtual viewpoint of the virtual environment is configured to shift in response to movement of the HMD secured to the model head;
• sample, by a data acquisition system (DAQ), signaling from a light sensor mounted on the model head based on a first luminance of the HMD related to the second shape;
• receive, by the DAQ, after sampling the signaling, from an accelerometer mounted on the model head, based on movement of the model head on the test stand along a first degree of freedom from a starting position to a final position, changed signaling indicating the movement of the model head;
• update the virtual viewpoint of the HMD based on the movement of the model head;
• display the updated virtual viewpoint in the HMD;
• receive, by the DAQ, from the light sensor, changed signaling based on displaying the updated virtual viewpoint in the HMD;
• and
• generate, by the DAQ, a data file encoding the signaling from the accelerometer and the light sensor.

A non-transitory computer-readable storage medium having computer program instructions stored thereon that, when executed by at least one processor, causes a device to perform:

• generating a virtual environment for a head mounted display (HMD) mounted to a model head on a test stand, wherein the virtual environment comprises at least a first shape and a second shape, wherein the first shape is a sphere surrounding a first virtual viewpoint and the second shape is a shape that precisely fills a virtual field of view from the first virtual viewpoint, and the first virtual viewpoint of the virtual environment is configured to shift in response to movement of the HMD secured to the model head;
• sample, by a data acquisition system (DAQ), signaling from a light sensor mounted on the model head, based on a first luminance of the HMD related to the second shape;
• receiving, by the DAQ, after sampling the signaling, from an accelerometer mounted on the model head, based on movement of the model head on the test stand along a first degree of freedom from a starting position to a final position, changed signaling indicating the movement of the model head;
• updating the virtual viewpoint of the HMD based on the movement of the model head;
• displaying the updated virtual viewpoint in the HMD;
• receiving, by the DAQ, from the light sensor, changed signaling based on displaying the updated virtual viewpoint in the HMD;
• and
• generating, by the DAQ, a data file encoding the signaling from the accelerometer and the light sensor.