CN102880361A - Positioning calibration method for electronic whiteboard equipment - Google Patents

Positioning calibration method for electronic whiteboard equipment Download PDF

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Publication number
CN102880361A
CN102880361A CN 201210385430 CN201210385430A CN102880361A CN 102880361 A CN102880361 A CN 102880361A CN 201210385430 CN201210385430 CN 201210385430 CN 201210385430 A CN201210385430 A CN 201210385430A CN 102880361 A CN102880361 A CN 102880361A
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positioning
frame
calibration
signal
image
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CN 201210385430
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Chinese (zh)
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CN102880361B (en )
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王秋平
张文奇
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南京芒冠光电科技股份有限公司
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Abstract

The invention discloses a positioning calibration method for electronic whiteboard equipment. The method comprises the following steps of: (1) acquiring a continuous frame image from a screen; (2) judging whether the continuous frame image comprises a light signal or not; (3) if a judgment result obtained by the step (2) indicates that the continuous frame image comprises the light signal, selecting two frame images at a time interval t from the continuous frame image, recording the coordinates of the light signal on the frame images respectively, and calculating an offset value of the coordinates; and (4) comparing the offset value of the coordinates to judge whether the positioning acquisition succeeds or not. According to the method, positioning point information can be accurately acquired, and positioning offset caused by the instability of the light signal can be prevented; and in addition, a handheld signal transmission device back slips to return to the previous positioning point for reacquisition, so that the trouble that the positioning calibration is required to be started over again after an ineffective click is avoided, positioning calibration time is shortened, and positioning calibration difficulty is lowered.

Description

电子白板设备的定位校准方法 A method of positioning and aligning device whiteboard

技术领域 FIELD

[0001] 本发明涉及电子白板设备的定位校准技术,尤其涉及一种能够对错误定位操作退回的定位校准方法。 [0001] The present invention relates to a positioning device whiteboard calibration technique, in particular, relates to a method of positioning and aligning the positioning operation of the error returned.

背景技术 Background technique

[0002] 电子白板设备在使用初始时需要进行定位校准,定位校准时,上位机软件首先在屏幕上生成定位校准画面,在定位校准画面上的几个特定位置上各设置有一个定位点,手持信号发射装置点击当前定位点中心,下位机采集该次点击的坐标并移动到下一定位点为一次有效点击。 [0002] When using the apparatus copyboard initial calibration needs to be positioned, the positioning calibration PC software first generates a calibration screen positioned on the screen, are each provided with a locating point positioned several specific positions on the calibration screen, hand-held Tap the current signal transmitting means positioned spot center, inferior machine that click and move to the next coordinate point positioned one valid clicks.

[0003] 举例来说,上位机软件首先在屏幕上生产定位校准画面,在定位校准画面上分布有若干彼此独立的定位点;下位机首先按顺选中第一个定位点作为当前定位点,然后使用手持信号发射装置点击当前定位点中心位置产生校准光斑,下位机采集到该校准光斑的位置信息后并选取下一个定位点做为当前定位点;当所有定位点都被点击到后,系统根据所有校准光斑的位置信息获得定位校准结果。 [0003] For example, the PC software is first produced on the screen of the screen positioning and aligning, positioning and aligning the screen on the distribution of a number of anchor points independently of each other; lower machine first press along a first anchor point selected as the current anchor point, and then after the hand-held transmission device click on the current location center position to generate the calibration spots, inferior machine to position information of the calibration spot and select the next anchor point as a current anchor point; when all positioning points is clicked, the system according to All calibration spot position information obtained by positioning the calibration results. 上述过程中,记下位机采集到校准光斑的位置信息后并选取下一个定位点做为当前定位点为一次有效点击;为了便于操作者识别当前定位点,一般的设计方式为,在定位校准画面上仅显示出当前定位点,因此每次有效点击完成后,定位校准画面都不同。 The above-described process, the crew collected to the calibration position of the spot information of a note and select the next anchor point as a current anchor point is a valid click; for convenience of the operator to recognize the current setpoint, the general design approach, for positioning the calibration screen display only the current anchor point, so after each complete valid clicks, positioning and aligning the picture is different.

[0004] 在定位校准时,有可能会在屏幕上出现非手持信号发射装置产生的光斑、或者手持信号装置因误操作产生的光斑,我们称这类光斑为干扰光斑,由于下位机无法区分出干扰光斑,会误将干扰光斑当做校准光斑进行采集并移动到下一个定位点;由于干扰光斑和校准光斑的位置偏差比较大,会对最后的定位校准结果精度产生影响,而现有技术也不存在退后重新点击的选择,因此只能人为放弃本次的定位校准,再次回到初始状态重新进行定位校准,增加定位校准的时间和难度。 [0004] When positioning the calibration, there may be a hands-signal transmitting apparatus spots generated on the screen, or a handheld device due to erroneous signal to spots, we call such an interference speckle spot, since the machine can not distinguish the lower interference light spot, the spot as the calibration interference mistakenly spot collected and moved to the next anchor point; spots and the calibration spots due to interference of the positional deviation is relatively large, the final location would affect the results of calibration accuracy, the prior art does not exist back choose to re-click, it can only give up this man-positioning calibration, return to the initial state again re-positioning calibration, calibration time and increase positioning difficulty.

发明内容 SUMMARY

[0005] 发明目的:为了克服现有技术中存在的不足,本发明提供一种可以退后重新点击的电子白板设备的定位校准方法,避免因干扰光斑而导致的重新定位校准。 [0005] Object of the invention: In order to overcome the disadvantages present in the prior art, the present invention provides a method of re-calibration may be positioned back clicks whiteboard device, to avoid interference due to reposition the calibration spots caused.

[0006] 技术方案:为实现上述目的,本发明采用的技术方案为: [0006] Technical Solution: To attain the above object, the technical solution adopted by the invention is:

[0007] 电子白板设备的定位校准方法,该方法包括如下步骤: [0007] positioned whiteboard apparatus calibration method, the method comprising the steps of:

[0008] (I)以一定频率对屏幕进行连续帧图像采集; [0008] (I) at a frequency of screen image capture of consecutive frames;

[0009] (2)判断连续帧图像上是否都存在光信号; [0009] (2) determines whether there is an optical signal on the continuous frame images;

[0010] (3)若步骤(2)的判断结果为是,则在该所有连续帧图像中选取时间间隔为t的两帧图像,记录光信号分别在这两帧图像上的坐标,并计算两个坐标的偏差值; [0010] (3) of the step (2) the determination result is YES, to select all the frame images successive time interval t of the two images, the optical signal coordinates in the two frames of the image recording, calculating and two deviation coordinates;

[0011] (4)判断两个坐标的偏差值是否大于规定距离L,若判断结果为是,则本次定位点采集失败,回到上一次定位点位置,重新采集定位点数据; [0011] (4) determines whether the deviation value is greater than a predetermined two-coordinate distance L, if the judgment result is YES, this anchor point acquisition fails, back to the last stored position, re-positioning point data collection;

[0012] (5)若步骤(4)的判断结果为否,则本次定位点采集成功,继续采集下一定位点。 [0012] (5) If step (4) the determination result is NO, the successful acquisition of this anchor point, continues to acquire the next anchor point. [0013] 由于现有的定位校准过程中,操作人员根据定位校准画面就能够知道点击是否为干扰光斑引起,因此利用上述方法,在得知点击为干扰光斑引起时,通过手持信号发射装置在屏幕进行连续的划动,就能够让系统知道本次定位点采集失败,系统就可以做出相关处理。 [0013] Since the conventional process of positioning and aligning, positioning and aligning the screen according to the operator can know whether or clicks caused by the interference light spot, and therefore the above method, when the spot that clicks interference caused by the signal transmitting means in the handheld screen continuous paddling, we can let the system know this anchor point acquisition fails, the system can make a correlation process.

[0014] 该方法还可以用于检测手持信号发射装置及其他相关设备是否存在故障。 [0014] The method may also be used to detect a handheld transmission device and other related equipment is faulty.

[0015] 优选的,若本次定位点采集失败,则系统放弃上次点击的数据采集结果,并回到上一定位点位置;若本次定位点采集成功,则存储本次点击的数据采集结果,并移到下一定位点。 [0015] Preferably, if the current setpoint acquisition fails, the system discards the results of the previous click data acquisition, and return to a stored position; if this setpoint successfully acquired, this data collection is stored clicks As a result, locate and move to the next point. 通过这种设计,能够避免在得知点击是由干扰光斑引起的后,需要重头开始定位校准的麻烦,降低定位校准的时长和难度。 By this design, it is possible to avoid interference by the click that the light spot caused by the need to start over the trouble of positioning and aligning, positioning and aligning the reduced duration and degree of difficulty.

[0016] 优选的,所述步骤(3)中,选取时间间隔为t的两帧图像图像为中间间隔两帧的两帧图像。 [0016] Preferably, the step (3), select the time interval t of the two images is an interval of two frames two frames.

[0017] 有益效果:本发明提供的电子白板设备的定位校准方法,能够准确获取定位点信息,防止因光信号不稳定,造成的定位偏差;同时,采用手持信号发射装置做回滑动作,就可以控制回到上一定位点位置,进行重新采集,避免产生无效点击后需要重头开始定位校准的麻烦,降低定位校准的时长和难度。 [0017] Advantageous Effects of: positioning a calibration method of the present invention to provide electronic whiteboard apparatus, it is possible to accurately obtain the anchor point information, to prevent positional deviation due to the optical signal is unstable, resulting in the; same time, using a handheld transmission device do slip back operation, it a positioning control can return to the center position, re-collect, to avoid the need to re-start invalid clicks the trouble of positioning and aligning, positioning and aligning the reduced duration and degree of difficulty.

附图说明 BRIEF DESCRIPTION

[0018] 图I为本发明方法的应用实例流程图。 [0018] FIG I application example of a flowchart of the present method.

具体实施方式 detailed description

[0019] 下面结合附图对本发明作更进一步的说明。 [0019] DESCRIPTION OF DRAWINGS The invention further.

[0020] 如图I所示为一种电子白板设备的定位校准方法,在定位校准画面上存在N个定位点,本案中对每次手持信号发射装置产生的光信号都进行了一次判断,具体过程如下: [0020] FIG I shows a method of positioning and aligning whiteboard apparatus, there are N points positioned on the positioning calibration screen, in this case an optical signal transmitting means generates a signal every time a hand-held judgment are carried out, particularly process is as follows:

[0021] (I)显示定位画面,设定循环数n=0 ; [0021] (I) a display screen is positioned, set the number of cycles n = 0;

[0022] (2)使用投影精灵对其取景范围(屏幕)进行连续帧图像采集,一般数据采集频率为60/80帧; [0022] (2) using continuous projection sprite image acquisition range of its view (screen), the general data acquisition frequency is 60/80 frames;

[0023] (3)采用手持信号发射装置点击屏幕内定位点图标中心,一次点击能够采集到多帧数据; [0023] (3) using the hand-held transmission device click on the screen icon positioning center point, a click can be acquired data of multiple frames;

[0024] (4)投影精灵将采集到的COMS坐标信息上传至上位机,上位机每隔两帧记录一次坐标信息,连续两次记录的坐标分别记为(Xl,yi)和(X2,y2); [0024] (4) a projection sprite coordinate the collected information is uploaded to the upper COMS machine, PC once every two coordinate information recording, two consecutive records are denoted by coordinates (Xl, yi) and (X2, y2 );

[0025] (5)计算(X1J1)和(x2, y2)的偏差值(dx, dy),判断dx和dy是否同时小于等于L,若判断为是,则成功获得本次定位点坐标(X2,y2),并进行步骤(6),否则进行步骤(7),可以设计L 为2CM0S pixel ; [0025] (5) calculated (X1J1) and (x2, y2) of the deviation (dx, dy), determining dx and dy whether simultaneously or less L, if it is determined that the successful this anchor point coordinates (X2 , Y2), and the step (6), otherwise proceeds to step (7), L may be designed to 2CM0S pixel;

[0026] (6)存储本次点击的数据采集结果,n=n+l ; [0026] (6) stores this data acquisition views result, n = n + l;

[0027] (7)回到上一定位点,进入步骤(3); [0027] (7) back to a positioning point, proceeds to step (3);

[0028] (8)判断n=N是否成立,若判断为否,则移到下一定位点并进入步骤(3),否则结束,N为定位点总数。 [0028] (8) determines n = N is satisfied, if the determination is NO, then move to the next anchor point and proceeds to step (3), or end, N is the total number of the positioning point.

[0029] 以上所述仅是本发明的优选实施方式,应当指出:对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 [0029] The above are only preferred embodiments of the present invention, it should be noted: to those of ordinary skill in the art, in the present invention without departing from the principles of the premise, can make various improvements and modifications, such modifications and modifications should also be regarded as the protection scope of the present invention.

Claims (3)

  1. 1.电子白板设备的定位校准方法,其特征在于:该方法包括如下步骤: (1)以一定频率对屏幕进行连续帧图像采集; (2)判断连续帧图像上是否都存在光信号; (3)若步骤(2)的判断结果为是,则在该所有连续帧图像中选取时间间隔为t的两帧图像,记录光信号分别在这两帧图像上的坐标,并计算两个坐标的偏差值; (4)判断两个坐标的偏差值是否大于规定距离L,若判断结果为是,则本次定位点采集失败,回到上一次定位点位置,重新采集定位点数据; (5)若步骤(4)的判断结果为否,则本次定位点采集成功,继续采集下一定位点。 1. A method of positioning and aligning apparatus of the copyboard, characterized in that: the method comprising the steps of: (1) at constant frequency continuous frame image capture screen; (2) consecutive frames determines whether there is an optical image signal; (3 ) of the step (2) the determination result is YES, to select all the frame images successive time interval t of the two images, the optical signal coordinates in the two frames of the image recording, and calculates the coordinates of two deviation value; deviation (4) determining two coordinates is larger than a predetermined distance L, if the judgment result is YES, this anchor point acquisition fails, back to the last stored position, re-positioning point data collection; (5) if step (4) the determination result is NO, the successful acquisition of this anchor point, continues to acquire the next anchor point.
  2. 2.根据权利要求I所述的电子白板设备的定位校准方法,其特征在于:若本次定位点采集失败,则系统放弃上次点击的数据采集结果,并回到上一定位点位置;若本次定位点采集成功,则存储本次点击的数据采集结果,并移到下一定位点。 The method of positioning and aligning the whiteboard apparatus I as claimed in claim, wherein: if the current setpoint acquisition fails, the system discards the results of the previous click data acquisition, and return to a stored position; if the anchor point acquisition is successful, then store the results of this data collection clicks, and move to the next anchor point.
  3. 3.根据权利要求I所述的电子白板设备的定位校准方法,其特征在于:所述步骤(3)中,选取时间间隔为t的两帧图像图像为中间间隔两帧的两帧图像。 3. The method of positioning and aligning the whiteboard apparatus I according to claim, wherein: said step (3), select the time interval t is two images of two frames for two intermediate spaces.
CN 201210385430 2012-10-12 2012-10-12 A method of positioning and aligning device whiteboard CN102880361B (en)

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