HAND-RAISING DETECTION DEVICE, NON-TRANSITORY COMPUTER READABLE MEDIUM, AND HAND-RAISING DETECTION METHOD

• US 20170277943A1
• Filed: 07/29/2016
• Published: 09/28/2017
• Est. Priority Date: 03/25/2016
• Status: Active Grant

• Current Assignee: Fujifilm Business Innovation Corp. (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: SHINGU, Jun, TONOIKE, Masatsugu, IKEDA, Daisuke, UNO, Yusuke, YAMAURA, Yusuke, USUBA, Ryoko, ONISHI, Takeshi
• Granted Patent: US 10,503,969 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06T 2207/30196 Human being; Person
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G06V 10/76 based on eigen-space representations, e.g. from pose or different illumination conditions; Shape manifolds
• CPC Class Codes: G06V 40/28 Recognition of hand or arm movements, e.g. recognition of deaf sign language static hand signs G06V40/113
• CPC Class Codes: H04N 2013/0085 Motion estimation from stereoscopic image signals

Abstract

A hand-raising detection device includes a converter and a detection unit. The converter performs conversion of a predetermined space including a person into an overhead view image by using a result of three dimensional measurement performed on the predetermined space. The detection unit performs detection of a hand-raising action by using a silhouette image of the person in the overhead view image resulting from the conversion performed by the converter.

Claims

1. A hand-raising detection device comprising:

a converter that performs conversion of a predetermined space including a person into an overhead view image by using a result of three dimensional measurement performed on the predetermined space; and

a detection unit that performs detection of a hand-raising action by using a silhouette image of the person in the overhead view image resulting from the conversion performed by the converter.

2. The hand-raising detection device according to claim 1,

wherein the detection unit detects the hand-raising action by using an area ratio between an area of the silhouette image and an area of an ellipse that is fitted to the silhouette image.

3. The hand-raising detection device according to claim 1, further comprising:

a fingertip detection unit that detects a location of a fingertip of the person if the detection unit detects the hand-raising action.

4. The hand-raising detection device according to claim 3,

wherein the fingertip detection unit regards, as a location of a head of the person, a location that is highest in the silhouette image when the person does not perform the hand-raising action, and the fingertip detection unit detects, as the location of the fingertip, a location that is farthest from the location of the head in an ellipse that is fitted to the silhouette image.

5. The hand-raising detection device according to claim 3,

wherein the fingertip detection unit further detects an orientation of a face of the person and judges whether the detected location of the fingertip is appropriate.

6. The hand-raising detection device according to claim 1, further comprising:

a display that displays, as an image, a result of the detection performed by the detection unit.

7. The hand-raising detection device according to claim 1,

wherein the detection unit performs the detection of the hand-raising action by using a silhouette image having a height equal to or shorter than a predetermined distance from a location of a head of the person.

8. A non-transitory computer readable medium storing a program causing a computer to function as the hand-raising detection device according to claim 1.

9. A hand-raising detection method comprising:

performing conversion of a predetermined space including a person into an overhead view image by using a result of three dimensional measurement performed on the predetermined space; and

detecting a hand-raising action by using a silhouette image of the person in the overhead view image resulting from the conversion.