US 9,811,908 B2
Head-mountable apparatus and systems
Sharwin Winesh Raghoebardajal, London (GB); and Ian Henry Bickerstaff, London (GB)
Assigned to Sony Interactive Entertainment Europe Limited, (GB)
Appl. No. 14/896,859
Filed by Sony Interactive Entertainment Europe Limited, London (GB)
PCT Filed Jun. 11, 2014, PCT No. PCT/GB2014/051804
§ 371(c)(1), (2) Date Dec. 8, 2015,
PCT Pub. No. WO2014/199160, PCT Pub. Date Dec. 18, 2014.
Claims priority of application No. 1310359.3 (GB), filed on Jun. 11, 2013; application No. 1314968.7 (GB), filed on Aug. 21, 2013; and application No. 1410426.9 (GB), filed on Jun. 11, 2014.
Prior Publication US 2016/0155231 A1, Jun. 2, 2016
Int. Cl. G06K 9/46 (2006.01); G06T 7/00 (2017.01); G02B 27/01 (2006.01); A63F 13/428 (2014.01); A63F 13/211 (2014.01); A63F 13/213 (2014.01); A63F 13/5258 (2014.01); A63F 13/212 (2014.01); G06F 3/01 (2006.01); G06K 9/62 (2006.01); G06T 3/00 (2006.01); H04N 5/232 (2006.01); G06T 7/32 (2017.01); G06T 7/70 (2017.01); G06T 7/73 (2017.01); G06T 7/246 (2017.01)
CPC G06T 7/0026 (2013.01) [A63F 13/211 (2014.09); A63F 13/212 (2014.09); A63F 13/213 (2014.09); A63F 13/428 (2014.09); A63F 13/5258 (2014.09); G02B 27/017 (2013.01); G02B 27/0172 (2013.01); G06F 3/011 (2013.01); G06K 9/6202 (2013.01); G06T 3/0093 (2013.01); G06T 7/246 (2017.01); G06T 7/32 (2017.01); G06T 7/70 (2017.01); G06T 7/73 (2017.01); H04N 5/23238 (2013.01); G02B 2027/014 (2013.01); G02B 2027/0123 (2013.01); G02B 2027/0138 (2013.01); G02B 2027/0187 (2013.01); G06T 2207/10016 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A head mountable display (HMD) comprising:
an upward facing camera associated with a wide angle lens configured to capture images of an environment of the HMD;
an image comparator operatively coupled to the upward facing camera, the image comparator being arranged to derive an indication of yaw of the HMD from images captured by the upward facing camera at different points in time; and
a processor configured to identify feature points in the images captured at different points in time, and to detect positions in the images of the identified feature points so as to provide an indication of rotational movement of the HMD between two respective images, in which the processor is configured to detect indications of the rotational movement from a plurality of pairs of image positions, each pair representing opposite viewpoints of the camera, and in which the processor is further configured to derive the indication of rotational movement from one or more pairs exhibiting a lowest difference between the viewpoints of that pair.