Method for adjusting detection result of image quadrilateral frame

A detection result, quadrilateral technology, applied in the field of image processing, can solve problems such as irregular quadrilaterals, missing corners, etc., to achieve the effect of simplifying operations

Active Publication Date: 2010-08-18
SHANGHAI HEHE INFORMATION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Text image Text content is generally displayed in a rectangular area, and the captured picture will have unwanted edge areas outside the target rectangular area. Secondly, due to the shooting angle, the target rectangular area may appear irregular quadrilateral (as shown in 1(a)), or missing corners (as shown in Figure 1(b))

Method used

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  • Method for adjusting detection result of image quadrilateral frame
  • Method for adjusting detection result of image quadrilateral frame
  • Method for adjusting detection result of image quadrilateral frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The present invention aims at the needs of the user to adjust the detected frame after the quadrilateral frame detection process on the image, and provides a visual interface to draw the detected four frames, and allow the user to move through the entire screen range through the mouse , touch the touch point of the pen or finger, automatically calculate and select the adjustment vertex, and perform zoom-in and sliding display operations on the displayed image, so that the vertex area selected by the user for adjustment is clearly displayed in the center of the screen, allowing the user to easily perform sliding adjustments. The present invention provides a frame vertex self-adsorption setting option, so that the user can choose to adjust the vertex to the range near the target frame area, lift the mouse, touch the pen or finger, and the vertex will be automatically selected and adjusted to the nearest candidate frame vertex nearby Location.

[0063] Frame vertex self-ad...

Embodiment 2

[0116] The difference between this embodiment and Embodiment 1 is that in this embodiment, the step 130 includes the following steps:

[0117] Step 310', obtain the position of the click point on the screen, calculate the distances from the point to the four vertices of the screen, and take the maximum value as the maximum radius parameter r max , and initialize the radius r as r max / n, n is a set parameter;

[0118] Step 320', taking the landing point as the center and drawing a circle with r as the radius;

[0119] Step 330', judge the four vertices respectively, and judge whether each vertex is included in the circle;

[0120] Step 340', judging: whether no vertex is included, if the answer is yes, increase the value of r according to the set rule (such as the rule mentioned in Embodiment 1, of course, those skilled in the art can easily think of other similar rule), and go to step 320, if the answer is no, go to step 350;

[0121] Step 350', judging: whether only one ...

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Abstract

The invention discloses a method for adjusting a detection result of an image quadrilateral frame, comprising the following steps of: touching within the whole screen range through a mouse, a touch pen or a finger by using human-computer interface interactive technology after a target frame is acquired by an image engine, automatically and rapidly selecting an adjusting top point in an optimal manner, calculating the adjusting range according to the adjusting top point, and amplifying and displaying within the visible range of the screen. Therefore, a user can monitor the result of adjusting the target frame while dragging the top point to adjust the target frame. The method not only enables the adjusting area to be clearer and increases the adjusting precision, but also avoids the condition that the adjusting point area exceeds the display range of the screen because of amplification. Because the introduction of adjusting point automatic adsorption technology, the user operation is simplified, and the user can obtain the desired adjusting result quickly through fewest operations.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to an image adjustment method, in particular to a method for adjusting the detected quadrilateral frame range after the quadrilateral frame detection is performed on the image. Background technique [0002] At present, more and more functions for processing and extracting information from photographed pictures appear on commercial devices such as scanners and commercial mobile phones. These functions generally fall into two categories: [0003] 1) Correction and enhancement of whiteboard image [0004] Whiteboard images are images taken of conference whiteboards, bulletin boards, and other text-like rectangular objects. The information that the user is interested in in the whiteboard image is generally within the rectangular area, and the captured image will firstly have unwanted edge areas outside the target rectangular area, and secondly, due to the problem of the shootin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/00
Inventor 丁霄鹏王巍李平新
Owner SHANGHAI HEHE INFORMATION TECH DEV
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