METHOD AND TERMINAL FOR MEASURING ANGLE

• US 20150338211A1
• Filed: 02/09/2015
• Published: 11/26/2015
• Est. Priority Date: 05/26/2014
• Status: Active Grant

• Current Assignee: Xiaomi Inc. (Xiaomi Corp.)
• Original Assignee: Xiaomi Inc. (Xiaomi Corp.)
• Inventors: Hu, Xiaowei, Han, Wei, Zhu, Yin
• Granted Patent: US 9,897,439 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01B 11/26 for measuring angles or tapers; for testing the alignment of axes
• CPC Class Codes: G06V 10/243 by compensating for image skew or non-uniform image deformations
• CPC Class Codes: G06V 20/20 in augmented reality scenes

Abstract

A method for a terminal to measure an angle, includes: displaying a horizontal reference line, a measurement line, and an object being imaged by a camera on a display interface of the terminal, a plane determined by the measurement line and the horizontal reference line being parallel with the display interface, and the measurement line being relatively static with respect to the display interface; during a process in which the terminal is turned to cause, on the display interface, an edge of the object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line; and determining an angle obtained when the edge of the object is parallel with the measurement line as an angle between the object and a horizontal plane.

Claims

1. A method for a terminal to measure an angle, comprising:

displaying a horizontal reference line, a measurement line, and an object being imaged by a camera on a display interface of the terminal, a plane determined by the measurement line and the horizontal reference line being parallel with the display interface, and the measurement line being relatively static with respect to the display interface;

during a process in which the terminal is turned to cause, on the display interface, an edge of the object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line; and

determining an angle obtained when the edge of the object is parallel with the measurement line as an angle between the object and a horizontal plane.

2. The method according to claim 1, wherein the displaying of the horizontal reference line, the measurement line, and the object comprises:

detecting whether the terminal is in an inclined state; and

if it is detected that the terminal is in the inclined state, starting the camera, and displaying the horizontal reference line, the measurement line, and the object being imaged by the camera on the display interface.

3. The method according to claim 2, wherein the detecting of whether the terminal is in an inclined state comprises:

measuring an inclined angle between the terminal and the horizontal plane;

detecting whether the inclined angle falls into a preset angle range; and

if it is detected that the inclined angle Falls into the preset angle range, determining that the terminal is in the inclined state.

4. The method according to claim 1, wherein the obtaining of a first angle of the one or more angles between the measurement line and the horizontal reference line comprises:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measuring a rotating angle of the measurement line with respect to the horizontal reference line, and determining the rotating angle as the first angle between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measuring the rotating angle of the measurement line with respect to the horizontal reference line, calculating an angle difference by subtracting the initial angle from the rotating angle, and determining the angle difference as the first angle between the measurement line and the horizontal reference line.

5. The method according to claim 2, wherein the obtaining of a first angle of the one or more angles between the measurement line and the horizontal reference line comprises:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measuring a rotating angle of the measurement line with respect to the horizontal reference line, and determining the rotating angle as the first angle between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measuring the rotating angle of the measurement line with respect to the horizontal reference line, calculating an angle difference by subtracting the initial angle from the rotating angle, and determining the angle difference as the first angle between the measurement line and the horizontal reference line.

6. The method according to claim 3, wherein the obtaining of a first angle of the one or more angles between the measurement line and the horizontal reference line comprises:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measuring a rotating angle of the measurement line with respect to the horizontal reference line, and determining the rotating angle as the first angle between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measuring the rotating angle of the measurement line with respect to the horizontal reference line, calculating an angle difference by subtracting the initial angle from the rotating angle, and determining the angle difference as the first angle between the measurement line and the horizontal reference line.

7. The method according to claim 1, wherein the object is a first object and, when the camera images a second object, the method further comprising:

during process in which the terminal is turned to cause, on the display interface, an edge of the second object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line;

determining an angle obtained when the edge of the second object is parallel with the measurement line as an angle between the second object and the horizontal plane;

calculating an angle difference by subtracting the angle between the second object and the horizontal plane from the angle between the first object and the horizontal plane; and

determining an absolute value of the angle difference as an angle between the first object and the second object.

8. A terminal, comprising:

a processor; and

a memory configured to store instructions executable by the processor;

wherein the processor is configured to;

display a horizontal reference line, a measurement line, and an object being imaged by a camera on a display interface of the terminal, a plane determined by the measurement line and the horizontal reference line being parallel with the display interface, and the measurement line being relatively static with respect to the display interface;

during a process in which the terminal is turned to cause, on the display interface, an edge of the object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line; and

determining an angle obtained when the edge of the object is parallel with the measurement line as an angle between the object and a horizontal plane.

9. The terminal according to claim 8, wherein the processor is further configured to:

detect whether the terminal is in an inclined state; and

if it is detected that the terminal is in the inclined state, start the camera, and display the horizontal reference line, the measurement line, and the object being imaged by the camera on the display interface.

10. The terminal according to claim 9, wherein the processor is further configured to:

measure an inclined angle between the terminal and the horizontal plane;

detect whether the inclined angle thus into a preset angle range; and

if it is detected that the inclined angle falls into the preset angle range, determine that the terminal is in the inclined state.

11. The terminal according to claim 8, wherein the processor is further configured to:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measure a rotating angle of the measurement line with respect to the horizontal reference line, and determine the rotating angle as a first one of the one or more angles between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measure the rotating angle of the measurement line with respect to the horizontal reference line, calculate an angle difference by subtracting the initial angle from the rotating angle, and determine the angle difference as the first one of the one or more angles between the measurement line and the horizontal reference line.

12. The terminal according to claim 9, wherein the processor is further configured to:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measure a rotating angle of the measurement line with respect to the horizontal reference line, and determine the rotating angle as a first one of the one or more angles between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measure the rotating angle of the measurement line with respect to the horizontal reference line, calculate an angle difference by subtracting the initial angle from the rotating angle, and determine the angle difference as the first one of the one or more angles between the measurement line and the horizontal reference line.

13. The terminal according to claim 10, wherein the processor is further configured to:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measure a rotating angle of the measurement line with respect to the horizontal reference line, and determine the rotating angle as a first one of the one or more angles between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measure the rotating angle of the measurement line with respect to the horizontal reference line, calculate an angle difference by subtracting the initial angle from the rotating angle, and determine the angle difference as the first one of the one or more angles between the measurement line and the horizontal reference line.

14. The terminal according to claim 8, wherein the object is a first object and, when the camera images a second object, the processor is further configured to:

during a process in which the terminal is turned to cause, on the display interface, an edge of the second object to be parallel with the measurement line, obtain one or more angles between the measurement line and the horizontal reference line;

determine an angle obtained when the edge of the second object is parallel with the measurement line as an angle between the second object and the horizontal plane;

calculate an angle difference by subtracting the angle between the second object and the horizontal plane from the angle between the first object and the horizontal plane; and

determine an absolute value of the angle difference as an angle between the first object and the second object.

15. A non-transitory computer-readable storage medium having stored therein instructions that, when executed by a processor of a terminal, cause the terminal to perform a method for measuring an angle, the method comprising:

displaying a horizontal reference line, a measurement line, and an object being imaged by a camera on a display interface of the terminal, a plane determined by the measurement line and the horizontal reference line being parallel with the display interface, and the measurement line being relatively static in respect to the display interface;

during a process in which the terminal is turned to cause, on the display interface, an edge of the object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line; and

determining an angle obtained when the edge of the object is parallel with the measurement line as an angle between the object and a horizontal plane.

16. The non-transitory computer-readable storage medium according to claim 15, wherein the displaying of the horizontal reference line, the measurement line, and the object comprises:

detecting whether the terminal is in an inclined state; and

if it is detected that the terminal is in the inclined state, starting the camera, and displaying the horizontal reference line, the measurement line, and the object being imaged by the camera on the display interface.

17. The non-transitory computer-readable storage medium according to claim 16, wherein the detecting of whether the terminal is in an inclined state comprises:

measuring an inclined angle between the terminal and the horizontal plane;

detecting whether the inclined angle falls into a preset angle range; and

if it is detected that the inclined angle falls into the preset angle range, determining that the terminal is in the inclined state.

18. The non-transitory computer-readable storage medium according to claim 15, wherein the obtaining of a first angle of the one or more angles between the measurement line and the horizontal reference line comprises:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measuring a rotating angle of the measurement line with respect to the horizontal reference line, and determining the rotating angle as the first angle between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measuring the rotating angle of the measurement line with respect to the horizontal reference line, calculating an angle difference by subtracting the initial angle from the rotating angle, and determining the angle difference as the first angle between the measurement line and the horizontal reference line.

19. The non-transitory computer-readable storage medium according to claim 16, wherein the obtaining of a first angle of the one or more angles between the measurement line and the horizontal reference line comprises:

if the measurement line is parallel with or coincident with the horizontal reference line at an initial moment, measuring a rotating angle of the measurement line with respect to the horizontal reference line, and determining the rotating angle as the first angle between the measurement line and the horizontal reference line; and

if there is an initial angle between the measurement line and the horizontal reference line at the initial moment, measuring the rotating angle of the measurement line with respect to the horizontal reference line, calculating an angle difference by subtracting the initial angle from the rotating angle, and determining the angle difference as the first angle between the measurement line and the horizontal reference line.

20. The non-transitory computer-readable storage medium according to claim 15, wherein the object is a first object and, when the camera images a second object, the method further comprises:

during a process in which the terminal is turned to cause an edge of the second object to be parallel with the measurement line, obtaining one or more angles between the measurement line and the horizontal reference line;

determining an angle obtained when the edge of the second object is parallel with the measurement line as an angle between the second object and the horizontal plane;

calculating an angle difference by subtracting the angle between the second object and the horizontal plane from the angle between the first object and the horizontal plane; and

determining an absolute value of the angle difference as an angle between the first object and the second object.