Human-machine interface guidance/indication device and method for iris recognition of mobile terminal

• US 10,133,925 B2
• Filed: 03/14/2017
• Issued: 11/20/2018
• Est. Priority Date: 09/15/2014
• Status: Active Grant

• Current Assignee: Suzhou Siyuan Kean Information Technology Co Ltd
• Original Assignee: Suzhou Siyuan Kean Information Technology Co Ltd
• Inventors: Ni, Weimin, Shen, Hongquan
• Primary Examiner(s): Nawaz, Talha M
• Application Number:
  US15/458,348
• Publication Number:
  US 20170185840A1
• Time in Patent Office: 616 Days
• Field of Search: None
• CPC Class Codes: G06V 10/242 by image rotation, e.g. by 90 degrees
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: G06V 40/67 by interactive indications to the user

Abstract

The present disclosure provides a human-machine interface guidance/indication device for iris recognition of a mobile terminal, comprising a mobile terminal and an iris recognition imaging module; the mobile terminal comprises a visible light LED (light emitting diode) and a display screen respectively in signal connection with a processor chip; the iris recognition imaging module comprises an imaging sensor and a near-infrared LED lighting source, and a near-infrared optical filter and an optical imaging lens are arranged on the imaging sensor; the processor chip is in signal connection with the imaging sensor and the near-infrared LED lighting source respectively.

Claims

1. A human-machine interface guidance/indication device for iris recognition of a mobile terminal, comprising a mobile terminal and an iris recognition imaging module, wherein the mobile terminal comprises a processor chip and an display screen mutually in signal connection with the processor chip;

the processor chip is configured to receive an iris image outputted by the iris recognition imaging module, and to provide a feedback control to the display screen for the human-machine interface guidance/indication according to the iris image outputted by the iris recognition imaging module;

the feedback control to the display screen for the human-machine interface guidance/indication comprises a guidance/indication generated by a feedback of an image displayed on the display screen;

the guidance/indication generated by a feedback of an image displayed on the display screen is processed by the processor chip through a center pixel offset or PAN/TILT angle rotation processed by the iris recognition imaging module, and then is displayed on the display screen.

2. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein the center pixel offset or PAN/TILT angle rotation a pixel offset is generated between a display imaging center of the display screen and an optical center of the iris recognition imaging module.

3. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein:

a pixel offset, X_PIXEL_OFFSET, is generated between a display imaging center of the display screen and an optical center of the iris recognition imaging module;

and the pixel offset is processed by the following steps of;

setting an imaging center pixel offset X_PIXEL_OFFSET displayed on the display screen;

the imaging center pixel offset X_PIXEL_OFFSET is satisfied;

X_PIXEL_OFFSET=X_OFFSET*PIXEL_RESOULATION

X_OFFSET=Xd−

Xm

PIXEL_RESOULATION=POI/SOI;

wherein

the X_OFFSET are X-axis coordinate offsets of a physical location between the display imaging center of the display screen and the optical center of the iris recognition imaging module;

Xd is an X-axis coordinate of a physical location of the display imaging center of the display screen;

Xm is an X-axis coordinate of a physical location of the optical center of the iris recognition imaging module;

the PIXEL_RESOULATION is an optical pixel resolution of the iris recognition imaging module;

the POI is a pixel dimension of a preset iris diameter; and

the SOI is a physical dimension of the preset iris diameter.

4. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 3, wherein:

the POI is satisfied;

150 pixel≤

POI≤

300 pixel;

the SOI is satisfied;

10 mm≤

SOI≤

12 mm;

the X_PIXEL_OFFSET is satisfied;

X_PIXEL_OFFSET≤

20%*X_ROI;

the X_ROI is an X-axis full resolution pixel number of the imaging sensor.

5. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein:

a pixel offset, Y_PIXEL_OFFSET, is generated between a display imaging center of the display screen and an optical center of the iris recognition imaging module;

and the pixel offset is processed by the following steps of;

setting an imaging center pixel offset Y_PIXEL_OFFSET displayed on the display screen;

the imaging center pixel offset Y_PIXEL_OFFSET is satisfied;

Y_PIXEL_OFFSET=Y_OFFSET*PIXEL_RESOULATION

Y_OFFSET=Yd−

Ym

PIXEL_RESOULATION=POI/SOI;

wherein

the Y_OFFSET are Y-axis coordinate offsets of a physical location between the display imaging center of the display screen and the optical center of the iris recognition imaging module;

Yd is an Y-axis coordinate of a physical location of the display imaging center of the display screen;

Ym is an Y-axis coordinate of a physical location of the optical center of the iris recognition imaging module;

the PIXEL_RESOULATION is an optical pixel resolution of the iris recognition imaging module;

the POI is a pixel dimension of a preset iris diameter; and

the SOI is a physical dimension of the preset iris diameter.

6. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 5, wherein:

the POI is satisfied;

150 pixel≤

POI≤

300 pixel;

the SOI is satisfied;

10 mm≤

SOI≤

12 mm;

the Y_PIXEL_OFFSET is satisfied;

Y_PIXEL_OFFSET≤

20%*Y_ROI;

the Y_ROI is an Y-axis full resolution pixel number of the imaging sensor.

7. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 3, wherein:

the pixel offset, X_PIXEL_OFFSET, between a display imaging center of the display screen and an optical center of the iris recognition imaging module is satisfied;

X_PIXEL_OFFSET 0.

8. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 5, wherein:

the pixel offset, Y_PIXEL_OFFSET, between a display imaging center of the display screen and an optical center of the iris recognition imaging module is satisfied;

Y_PIXEL_OFFSET 0.

9. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 2, wherein:

angle rotation θ

PAN/θ

TILT is generated between a display imaging center of the display screen and an optical center of the iris recognition imaging module;

the angle rotation θ

PAN/θ

TILT is satisfied;

θ

PAN=arctan((Xd−

Xm)/Ze)

θ

TILT=arctan((Yd−

Ym)/Ze)

wherein,

(Xd, Yd,

     0) is an XYZ-axis coordinate of a physical location of the display imaging center of the display screen;

(Xm, Ym,

     0) is an XYZ-axis coordinate of a physical location of the optical center of the iris recognition imaging module; and

(Xe, Ye, Ze) is an XYZ-axis coordinate of a physical location of a center of the user'"'"'s eyes.

10. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 9, wherein:

the angle rotation θ

PAN/θ

TILT is satisfied;

θ

PAN≤

15 degrees; and

θ

TILT≤

15 degrees.

11. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 9, wherein:

the angle rotation θ

PAN/θ

TILT between a display imaging center of the display screen and an optical center of the iris recognition imaging module is satisfied;

θ

PAN=θ

TILT=0.

12. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein the display screen is configured to display information indicating an appropriate user application scope, recognition failure and recognition success.

13. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein the display screen is an LCD or an OLED.

14. The human-machine interface guidance/indication device for iris recognition of a mobile terminal according to claim 1, wherein the iris recognition imaging module comprises an imaging sensor and a near-infrared LED lighting source, a near-infrared optical filter and an optical imaging lens.