Camera device and identity recognition method utilizing the same

• US 8,374,405 B2
• Filed: 10/26/2009
• Issued: 02/12/2013
• Est. Priority Date: 08/28/2009
• Status: Active Grant

• Current Assignee: Cloud Network Technology Singapore Pte. Ltd. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Lee, Hou-Hsien, Lee, Chang-Jung, Lo, Chih-Ping
• Primary Examiner(s): MARIAM, DANIEL G
• Application Number:
  US12/606,125
• Publication Number:
  US 20110052004A1
• Time in Patent Office: 1,205 Days
• Field of Search: 382/118, 382/209, 382/218, 382/154
• US Class Current: 382/118
• CPC Class Codes: G06V 40/16 Human faces, e.g. facial parts, sketches or expressions
• CPC Class Codes: G06V 40/40 Spoof detection, e.g. liveness detection

Abstract

A camera device includes an image capturing module, a face detection module, a light detection and ranging (LIDAR) system, a storage module, and a microprocessor. The image capturing module continuously captures images of a determined filed. The face detection module detects the images to obtain a face to be tested, and records coordinates of the face in the image. The LIDAR system scans the face to be tested in the determined field according to the coordinates thereby to obtain three-dimensional information of the face to be tested. The storage module stores three-dimensional information of a determined face. The microprocessor compares the three-dimensional information of the face to be tested with the three-dimensional information of the determined face, and then outputs a recognition signal.

Claims

1. A camera device, comprising:

an image capture module to capture images of a determined field;

a face detection module to detect the images captured by the image capture module, to obtain a face to be tested in one of the images, and record coordinates of the face to be tested in the image containing the face;

a light detection and ranging (LIDAR) to transmit laser light according the coordinates of the face to be tested in the image, to scan the face to be tested in the determined field, thereby to obtain three-dimensional information of the face to be tested;

a storage module for storing three-dimensional information of a determined face of a person; and

a microprocessor to compare the three-dimensional information of the face to be tested with the three-dimensional information of the determined face, thereby to output a recognition signal according to a result of the comparison;

wherein the three-dimensional information of the face to be tested and the determined face is obtained according to a speed of the laser light multiplied by half a time delay between a transmission pulse and a reflected pulse of the laser light.

2. The camera device of claim 1, wherein the three-dimensional information of the face comprises three-dimensional coordinates of all points of the face in the determined field.

3. The camera device of claim 1, wherein the microprocessor outputs the recognition signal for indicating that the face to be tested is not the determined face upon the condition that the three-dimensional of the face to be tested and the three-dimensional information of the determined face is not equal to each other or a difference between the three-dimensional of the face to be tested and the three-dimensional information of the determined face exceeds a pre-determined value.

4. The camera device of claim 1, wherein the microprocessor outputs the recognition signal for indicating that the face to be tested is the determined face upon the condition that the three-dimensional of the face to be tested and the three-dimensional information of the determined is equal to each other or a difference between the three-dimensional of the face to be tested and the three-dimensional information of the determined face does not exceed a pre-determined value.

5. An identity recognition method for a camera device comprising an image capture module, the method comprising:

capturing images of a determined field via the image capture module;

detecting the images via a face detection module to obtain a face to be tested in one of the images;

recording coordinates of the face to be tested in the image via the face detection module, and transmitting the coordinates of the face to be tested to a light detection and ranging (LIDAR) system;

scanning the face to be tested in the determined field by the LIDAR system according to the coordinates of the face to be tested in the image, to obtain three-dimensional information of the face to be tested, and to transmit the three-dimensional information of the face to be tested to a microprocessor; and

comparing the three-dimensional information of the face to be tested by the microprocessor with three-dimensional information of a determined face stored in a storage module, to output a recognition signal according to a result of the comparison, wherein the three-dimensional information of the face to be tested and the determined face is obtained according to a speed of the laser light multiplied by half a time delay between a transmission pulse and a reflected pulse of the laser light.

6. The method of claim 5, wherein the recognition signal is output by the microprocessor upon the condition that the microprocessor determines that the three-dimensional information of the face to be tested and the three-dimensional information of the determined face is not equal to each other or a difference between the three-dimensional of the face to be tested and the three-dimensional information of the determined face exceeds a pre-determined value.

7. The method of claim 5, wherein the recognition signal is output by the microprocessor upon the condition that the microprocessor determines that the three-dimensional information of the face to be tested and the three-dimensional information of the determined face is equal to each other or a difference between the three-dimensional of the face to be tested and the three-dimensional information of the determined face does not exceed the pre-determined value.

8. The method of claim 5, wherein the three-dimensional information of the face comprises three-dimensional coordinates of all points of the face in the determined field.

9. The method of claim 5, wherein obtaining the three-dimensional information of the determined face comprising:

capturing an image of a person in the determined field via the image capture module;

detecting the image by the face detection module to obtain the determined face of the person, to record coordinates of the determined face in the image; and

scanning the determined face in the determined field by the LIDAR system according to the coordinates of the determined face in the image, to obtain three-dimensional information of the determined face, and to transmit the three-dimensional information of the determined face to the microprocessor.