Method and apparatus for displaying point of interest

• US 9,710,946 B2
• Filed: 12/31/2014
• Issued: 07/18/2017
• Est. Priority Date: 07/17/2014
• Status: Active Grant

• Current Assignee: Baidu Online Network Technology (Beijing) Co., Ltd (Baidu Incorporated)
• Original Assignee: Baidu Online Network Technology (Beijing) Co., Ltd (Baidu Incorporated)
• Inventors: Liu, Pu, Yan, Sunrong, Li, Yongqiang
• Primary Examiner(s): Ge, Jin
• Application Number:
  US14/587,660
• Publication Number:
  US 20160019704A1
• Time in Patent Office: 930 Days
• Field of Search: 345619
• CPC Class Codes: G01C 21/3602 Input other than that of destination using image analysis, e.g. detection of road signs, lanes, buildings, real preceding vehicles using a camera
• CPC Class Codes: G01C 21/3811 Point data, e.g. Point of Interest [POI]
• CPC Class Codes: G06F 16/29 Geographical information databases
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 2215/16 Using real world measurements to influence rendering
• CPC Class Codes: G06V 20/10 Terrestrial scenes scenes under surveillance with static cameras G06V20/52; scenes perceived from the exterior of a vehicle G06V20/56; scenes perceived from the interior of a vehicle G06V20/59
• CPC Class Codes: G06V 20/20 in augmented reality scenes
• CPC Class Codes: G06V 20/63 Scene text, e.g. street names
• CPC Class Codes: G06V 30/10 Character recognition
• CPC Class Codes: G06V 30/1444 Selective acquisition, locating or processing of specific regions, e.g. highlighted text, fiducial marks or predetermined fields
• CPC Class Codes: H04W 4/021 Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences

Abstract

A method and apparatus for displaying a point of interest. In the embodiments of the present invention, by means of acquiring a location of a target object and then determining a visible point of interest at the location as a target point of interest, the target point of interest can be displayed. Since an invisible point of interest which cannot be seen at the location of the target object is no longer displayed, but a visible point of interest which can be seen at the location of the target object is displayed, the displayed point of interest can essentially satisfy the true locating intention of a user. Therefore, the problem in the prior art of the increase in data interaction between an application and a query engine caused by the user repeatedly querying via the application can be avoided, thereby reducing the processing burden of the query engine.

Claims

1. A method for displaying a point of interest, comprising:

acquiring a location of a target object;

performing recognition processing on a street view image acquired at the location, to recognize text information arranged at a selected height from a road surface in the street view image;

selecting a candidate point of interest from a point-of-interest (POI) database upon determining that the candidate point of interest matches the text information;

marking the candidate point of interest in the POI database as a visible point of interest at the location;

acquiring calculated geographical location information about the visible point of interest according to geographical location information about a collection site of the street view image and an azimuth angle from the collection site to the visible point of interest;

verifying the visible point of interest according to the calculated geographical location information and standard geographical location information about the visible point of interest;

replacing the standard geographical location information about the visible point of interest by the calculated geographical location information about the visible point of interest upon failure of said verifying;

determining the visible point of interest at the location as a target point of interest; and

displaying the target point of interest on an electronic map.

2. The method of claim 1, wherein said performing the recognition processing and said selecting the candidate point of interest each occur prior to said determining the visible point of interest.

3. The method of claim 1, wherein said selecting the candidate point of interest includes:

acquiring a degree of similarity between the text information and candidate points of interest to be matched; and

selecting at least one of the candidate points of interest as visible points of interest according to the degree of similarity.

4. The method of claim 1, further comprising:

acquiring the geographical location information about the collection site of the street view image to which the text information matching the visible point of interest belongs; and

acquiring the azimuth angle from the collection site to the visible point of interest based on the street view image.

5. The method of claim 4, wherein said acquiring the geographical location information, said acquiring the azimuth angle, said acquiring the calculated geographical location information and said verifying the visible point of interest each occur after said selecting the candidate point of interest.

6. The method of claim 1, wherein said displaying the target point of interest comprises displaying the target point of interest via at least one of map labeling, an image and text.

7. The method of claim 4, wherein:

said verifying is successful when a location difference value between the calculated geographical location information about the visible point of interest and the standard geographical location information about the visible point of interest is less than or equal to a preset threshold value; and

said verifying fails when the location difference value is greater than the preset threshold value.

8. An apparatus for displaying a point of interest, comprising:

a processor;

a display unit coupled to said processor; and

a memory having one or more programs stored thereon, the programs, when executed by said processor, instruct said processor to;

acquire a location of a target object;

perform recognition processing on a street view image acquired at the location, to recognize text information arranged at a selected height from a road surface in the street view image;

select a candidate point of interest from a point-of-interest (POI) database upon determining that the candidate point of interest matches the text information;

mark the candidate point of interest in the POI database as a visible point of interest at the location;

acquire calculated geographical location information about the visible point of interest according to geographical location information about a collection site of the street view image and an azimuth angle from the collection site to the visible point of interest;

verify the visible point of interest according to the calculated geographical location information and standard geographical location information about the visible point of interest;

replace the standard geographical location information about the visible point of interest by the calculated geographical location information about the visible point of interest upon failure of verifying the visible point of interest;

determine the visible point of interest at the location as a target point of interest; and

display the target point of interest on an electronic map via said display unit.

9. The apparatus of claim 8, wherein the programs instruct said processor to perform the recognition processing and select the candidate point of interest before determining the visible point of interest.

10. The apparatus of claim 8, wherein the programs instruct said processor acquire a degree of similarity between the text information and candidate points of interest to be matched and select at least one of the candidate points of interest as visible points of interest according to the degree of similarity.

11. The apparatus of claim 8, wherein the programs instruct said processor to acquire the geographical location information about the collection site of the street view image to which the text information matching the visible point of interest belongs, and to acquire the azimuth angle from the collection site to the visible point of interest based on the street view image.

12. The apparatus of claim 11, wherein the programs instruct said processor to acquire the geographical location information, acquire the azimuth angle, acquire the calculated geographical location information and verify the visible point of interest after selecting the candidate point of interest.

13. The apparatus of claim 8, wherein the programs instruct said processor to display the target point of interest via at least one of map labeling, an image and text.

14. A non-transitory computer storage medium including at

least one program for displaying a point of interest when implemented by a processor, comprising:

instruction for acquiring a location of a target object;

instruction for performing recognition processing on a street view image acquired at the location, to recognize text information arranged at a selected height from a road surface in the street view image;

instruction for selecting a candidate point of interest from a point-of-interest (POI) database upon determining that the candidate point of interest matches the text information;

instruction for marking the candidate point of interest in the POI database as a visible point of interest at the location;

instruction for acquiring calculated geographical location information about the visible point of interest according to geographical location information about a collection site of the street view image and an azimuth angle from the collection site to the visible point of interest;

instruction for verifying the visible point of interest according to the calculated geographical location information and standard geographical location information about the visible point of interest;

instruction for replacing the standard geographical location information about the visible point of interest by the calculated geographical location information about the visible point of interest upon failure of said verifying;

instruction for determining the visible point of interest at the location as a target point of interest; and

instruction for displaying the target point of interest on an electronic map.

15. The computer storage medium of claim 14, wherein said instruction for performing the recognition processing and said instruction for selecting the candidate point of interest each are executed prior to execution of said instruction for determining the visible point of interest.

16. The computer storage medium of claim 14, wherein said instruction for selecting the candidate point of interest includes:

instruction for acquiring a degree of similarity between the text information and candidate points of interest to be matched; and

instruction for selecting at least one of the candidate points of interest as visible points of interest according to the degree of similarity.

17. The computer storage medium of claim 14, further comprising:

instruction for acquiring the geographical location information about the collection site of the street view image to which the text information matching the visible point of interest belongs; and

instruction for acquiring the azimuth angle from the collection site to the visible point of interest based on the street view image.

18. The computer storage medium of claim 14, wherein said instruction for displaying the target point of interest comprises instruction for displaying the target point of interest via at least one of map labeling, an image and text.