Method and apparatus for adsorbing straight line/line segment, method and apparatus for constructing polygon

• US 10,332,236 B2
• Filed: 08/07/2014
• Issued: 06/25/2019
• Est. Priority Date: 08/16/2013
• Status: Active Grant

• Current Assignee: Intsig Information Co., Ltd.
• Original Assignee: Intsig Information Co., Ltd.
• Inventors: Long, Teng, Wang, Yue, Zhen, Lixin
• Primary Examiner(s): Ahmed, Samir A
• Application Number:
  US14/912,369
• Publication Number:
  US 20160203381A1
• Time in Patent Office: 1,783 Days
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 3/00 Geometric image transformations in the plane of the image
• 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 7/60 Analysis of geometric attributes
• CPC Class Codes: G06V 10/243 by compensating for image skew or non-uniform image deformations

Abstract

The present invention discloses a method for adsorbing a straight line/line segment in an image, including: presetting a straight line/line segment, dragging the straight line/line segment by selecting a first part of the line segment, and when a second part of the straight line/line segment is dragged to the vicinity of a line segment in an image, setting the preset line segment to be superposed with the line segment, the vicinity referring to that a minimum distance between the second part of the straight line/line segment and the line segment meets a preset rule. In the present invention, by means of the foregoing technical solution, a user can be conveniently assisted, according to a line segment that exists in an image, to define a polygon frame, so that subsequent image processing can be conveniently performed.

Claims

1. A method for performing a frame detection operation in an image for image recognition, comprising:

providing, by a device comprising a processor and a screen, the image on which the frame detection operation is to be performed;

detecting, by the device, a line segment in the image;

displaying, by the device, a target frame enclosed by preset straight line/line segment of the image on the screen;

dragging, by the device, the straight line/line segment when detecting that a user performs a dragging operation on the screen to further define the target frame, the dragging operation indicating a first part of the straight line/line segment is selected and moved, and

when a second part of the straight line/line segment is within a preset distance from the detected line segment in the image, superposing the preset straight line/line segment with the detected line segment on the screen to finalize the target frame for image recognition on the target frame.

2. The method according to claim 1, wherein the first part selected in dragging the preset line segment is either on the preset straight line/line segment or in the vicinity of the preset straight line/line segment.

3. The method according to claim 1, wherein the first part selected in dragging the preset straight line/line segment and the second part on the straight line/line segment are a same part or different parts.

4. The method according to claim 1, wherein the second part comprises at least one of the following cases:

an endpoint of the preset line segment;

a midpoint of the preset line segment; and

a point, having a minimum distance from any position on the detected line segment in the image, on the preset straight line/line segment.

13. The method according to claim 1, further comprising:

obtaining a value by multiplying a length of the detected line segment in the image by a proportional factor, when the distance is less than the value, superposing the preset straight line/line segment with the detected line segment on the screen to construct a polygon so that a position of a quadrilateral frame in the target frame is conveniently recognized.

5. A method for performing a frame detection operation in an image, comprising:

providing, by a device comprising a processor and a screen, the image on which the frame detection operation is to be performed;

detecting, by the device, a line segment in the image;

displaying, by the device, a target frame enclosed by preset straight line/line segment of the image on the screen;

dragging, by the device, the straight line/line segment by selecting a first part of the straight line/line segment when detecting that a user performs a dragging operation on the screen to further define the target frame, the dragging operation indicating the first part of the straight line/line segment, and

when dragging ends, a second part of the straight line/line segment is within a preset distance from a corresponding second part of the detected line segment in the image, superposing the preset straight line/line segment with the detected line segment on the screen to finalize the target frame for image recognition on the target frame.

6. The method according to claim 5, wherein the first part selected in dragging the preset line segment is either on the preset straight line/line segment or in the vicinity of the preset straight line/line segment.

7. The method according to claim 5, wherein the first part selected in dragging the preset straight line/line segment and the second part on the straight line/line segment are a same part or different parts.

8. The method according to claim 5, wherein the second part is a point, having a minimum distance from any position on the detected line segment in the image, on the preset straight line/line segment.

9. An apparatus for performing a frame detection operation in an image, comprising:

a processor and a screen, wherein the processor is configured to

provide the image on which the frame detection operation is to be performed;

detect a line segment in the image;

instruct the screen to display a target frame enclosed by preset straight line/line segment of the image on the screen;

drag the straight line/line segment when detecting that a user performs a dragging operation on the screen to further define the target frame, the dragging operation indicating a first part of the straight line/line segment is selected and moved, and

when a second part of the straight line/line segment is within a preset distance from the detected line segment in the image, superpose the preset straight line/line segment with the detected line segment on the screen to finalize the target frame for image recognition on the target frame.

10. The apparatus according to claim 9, wherein the first part selected in dragging the preset line segment is either on the preset straight line/line segment or in the vicinity of the preset straight line/line segment.

11. The apparatus according to claim 9, wherein the first part selected in dragging the preset straight line/line segment and the second part on the straight line/line segment are a same part or different parts.

12. The apparatus according to claim 9, wherein the second part comprises at least one of the following cases:

an endpoint of the preset line segment;

a midpoint of the preset line segment; and

a point, having a minimum distance from any position on the detected line segment in the image, on the preset straight line/line segment.