CN102457674A - Method for simulating gravity sensor with camera - Google Patents

Method for simulating gravity sensor with camera Download PDF

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CN102457674A
CN102457674A CN201010526326XA CN201010526326A CN102457674A CN 102457674 A CN102457674 A CN 102457674A CN 201010526326X A CN201010526326X A CN 201010526326XA CN 201010526326 A CN201010526326 A CN 201010526326A CN 102457674 A CN102457674 A CN 102457674A
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data
frame
image
camera
displacement
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CN201010526326XA
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田欢
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赛龙通信技术(深圳)有限公司
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Publication of CN102457674A publication Critical patent/CN102457674A/en

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Abstract

The invention discloses a method for simulating a gravity sensor with a camera. The method comprises the following steps of: capturing an image by the camera; compressing the captured image to form a compressed sub-image, searching a matching block with minimum SAD of a component Y in YUV data from the compressed sub-image, and recording the coordinates of the matching block in the compressed sub-frame, determining a corresponding region in the captured image according to obtained coordinate position; searching a matching region with minimum SAD in the region, and recording displacement relative to a previous frame of the image matching region; repeating the steps to get displacement data of the previous n frames of the current frame; and judging corresponding movements according to the gotten displacement data. The method implements the function of the gravity sensor in products comprising the camera.

Description

一种摄像头模拟重力感应器的方法 An image pickup head approach the gravity sensor analog

技术领域 FIELD

[0001] 本发明涉及一种摄像头模拟重力感应器的方法。 [0001] The present invention relates to a gravity sensor camera analog method. 背景技术 Background technique

[0002] 重力感应器(G-sensor),又名加速度传感器,它能够感知到加速力的变化,加速力就是当物体在加速过程中作用在物体上的力,比如晃动、跌落、上升、下降等各种移动变化都能被重力感应器转化为电信号,然后通过微处理器的计算分析后,就能够完成程序设计好的功能。 [0002] The gravity sensor (G-sensor), also known as an acceleration sensor, it can sense the change of acceleration forces, acceleration forces acting when the object is in the process of acceleration forces on an object, such as shaking, falling, rising, falling other changes can move the gravity sensor is converted into an electric signal, and a microprocessor designed by calculating a function of the analysis, it is possible to complete the process. 比如手机能根据使用者的甩动方向,前后切换歌曲,放进衣袋的时候也能够计算出使用者的前进步伐。 Such as mobile phones can be based on swinging direction of the user, before and after the switch songs, in his pocket when it is possible to calculate the user's pace.

[0003] 重力感应器的应用越来越广泛,但是因其成本较高,限制了它在一些低端产品如手机、MP3中的推广使用;而且,摄像头模拟重力感应器,必须基于图像进行匹配,而目前多采用基于图像像素灰度值进行匹配,或者对图像先进行预处理,之后再提取图像特征值进行匹配,前者需要处理的信息量大,计算复杂,速度慢,后者无法适应场景不断变化的情况。 [0003] gravity sensor used more and more widely, but because of its high cost, limited its number of low-end products such as mobile phones, MP3 is to promote the use; moreover, analog cameras gravity sensor, must be based on image matching , matching the current use based on the image pixel gray value, or the image was pretreated, after re-extracted image feature value matching the former volume of information to be processed, are complex and slow, which can not match the scene changing circumstances.

发明内容 SUMMARY

[0004] 本发明要解决的技术问题在于克服上述现有技术存在的不足,提供一种摄像头模拟重力感应器的方法,使具备摄像头的产品同时也具备重力感应器的功能,丰富了产品应用;采用了基于图像压缩的快速匹配方法,提高了摄像头模拟重力感应器的精度和速度,降低了功耗。 [0004] The present invention is to solve the technical problem is to overcome the disadvantages of the aforementioned prior art, there is provided a method of first analog gravity sensor camera, so have the camera product also includes a gravity sensor function, rich product applications; using a fast matching method based image compression, improved analog camera gravity sensor accuracy and speed, reducing power consumption.

[0005] 为解决上述技术问题,本发明提供一种摄像头模拟重力感应器的方法,其特征在于,包括以下步骤: [0005] To solve the above problems, the present invention provides a method for head imaging simulate gravity sensor, characterized by comprising the steps of:

[0006] 一摄像头捕获图像; [0006] a camera captures an image;

[0007] 压缩所捕获图像形成一压缩子图,在压缩子图中查找YUV数据中Y分量的SAD最小的匹配块,并记录在压缩子图中的坐标位置,依据获取的坐标位置,确定所捕获图像中对应的区域; [0007] compressing the captured image to form a compressed sub-picture, look for the YUV data in the Y component in the compressed subgraph SAD smallest matching block, and records the coordinate position compressed sub-figures, according to the coordinate position acquired, determining corresponding area in the image captured;

[0008] 在所述区域中查找SAD最小的匹配区域,并记录相对于前一帧图像匹配区域的相对位移; [0008] Find the smallest SAD matching area in the region, and to record the relative displacement of the previous frame image matching area;

[0009] 重复以上步骤获取当前帧前η帧图像的位移数据; [0009] Repeat the above steps η displacement data acquired before the current frame image frame;

[0010] 根据获取的位移数据进行相应动作的判断。 [0010] the determination of the displacement of the corresponding operation of the data acquisition.

[0011] 本发明的有益技术效果在于:由于采用了以上方案,可在具备摄像头的产品中实现重力感应器的功能;而且,在摄像头所捕获的每帧图像进行遍历匹配的过程中,采用了基于图像压缩的快速匹配方法,提高了摄像头模拟重力感应器的精度和速度,降低了功耗。 [0011] Advantageous effects of the present invention: With the above embodiment, may be implemented gravity sensor functionality includes camera products; moreover, the process traversed matching each frame image of the camera captured, using fast matching method based image compression, improved analog camera gravity sensor accuracy and speed, reducing power consumption.

附图说明 BRIEF DESCRIPTION

[0012] 图1为本发明摄像头模拟重力感应器方法的架构图。 [0012] FIG 1 FIG camera gravity sensor simulation framework method of the present invention.

[0013] 图2为本发明中重力感应器模拟模块的结构图。 [0013] FIG 2 is a configuration diagram of the invention the gravity sensor analog modules. [0014] 图3为本发明中数据采集模块的结构图。 [0014] FIG. 3 the data acquisition module configuration diagram of the present invention.

[0015] 图4为本发明中数据处理模块的结构图。 [0015] FIG 4 a configuration diagram of the data processing module of the present invention.

[0016] 图5为本发明中动作判断模块的结构图。 [0016] FIG. 5 is a configuration diagram of an operation determination module invention.

[0017] 图6为本发明摄像头模拟重力感应器方法的流程图。 [0017] The flowchart of FIG. 6 camera gravity sensor simulation methods of the present invention.

具体实施方式 Detailed ways

[0018] 下面通过具体的实施方式并结合附图对本发明作进一步详细地描述。 [0018] The following by specific embodiments in conjunction with the accompanying drawings of the present invention will be further described in detail.

[0019] 本实施例通过手机摄像头模拟重力感应器,经压缩摄像头所捕获的图像,计算压缩后每帧图像YUV数据中Y分量SAD值最小的匹配块起始坐标位置,在未压缩原图像中对应该坐标位置相应的区域再次查找SAD值最小的匹配区域,记录该匹配区域相对于前一帧图像匹配区域的相对位移,依此建立手机左右甩动的数学模型,做出相应的动作判断,触发手机MP3歌曲的前后切换。 [0019] In this embodiment, camera phone analog gravity sensor, the compressed camera captured image, after calculating the compressed every frame YUV data Y component SAD value the minimum matching block start coordinate position in the uncompressed original image a coordinate position corresponding to the region should find the minimum SAD value matching area again, the recording area of ​​the matching relative displacement of the previous frame image matching area, so the mathematical model of swinging around the phone, make the appropriate action is determined, before and after the trigger switch phone MP3 songs.

[0020] 请参阅图1,本发明使用摄像头模拟重力感应器的手机包括摄像头、微处理器以及多媒体播放模块。 [0020] Referring to FIG. 1, the present invention employs an analog camera, a gravity sensor includes a camera phone, multimedia playback module and a microprocessor. 一重力感应器模拟模块通过微处理器来执行。 A gravity sensor simulation module executed by a microprocessor.

[0021] 请同时参阅图2至图5,重力感应器模拟模块包括数据采集模块、数据处理模块以及动作判断模块。 [0021] Referring also to FIGS. 2 to 5, the analog module comprises a gravity sensor data acquisition module, a data processing module and a determining module operation. 数据采集模块用于在摄像头开启后捕获图像。 Data acquisition means for capturing an image after the camera is turned on. 数据处理模块压缩所捕获图像形成一压缩子图,在压缩子图中查找YUV数据中Y分量的SAD(Sum of Absolute Differences,绝对误差和)最小的匹配块,并记录在压缩子图中的坐标位置;所述数据处理模块依据获取的坐标位置,确定所捕获图像中对应的区域;所述数据处理模块在所述区域中查找SAD最小的匹配区域,并记录相对于前一帧图像匹配区域的相对位移。 Data processing module compressing the captured image to form a compressed sub-picture, look for the YUV data in the Y component in the compressed subgraph SAD (Sum of Absolute Differences, absolute error sum) minimum matching block, and recording the coordinates of the compression subgraph position; the data processing module based on the acquired coordinate position, determining a corresponding area of ​​the captured image; the data processing module to find a minimum SAD matching area in the region, and recorded relative to the previous frame image matching area Relative displacement.

[0022] 动作判断模块根据获取的位移数据进行相应动作的判断。 [0022] The operation determination module determines the corresponding operation according to the acquired displacement data. 所述动作判断模块根据获取的位移数据形成数组,建立左甩动作和右甩动作的判定标准。 The operation determining module array is formed according to the acquired displacement data, the establishment of left and right swing operation of the swing operation criteria. 所述动作判断模块判断为左甩动作,则触发切换至前一首歌曲;所述动作判断模块判断为右甩动作,则触发切换至后一首歌曲。 The operation determining module determines that the left swing operation, the trigger switch to the previous song; determining module determines that the operation of the right swing operation, is triggered after the switch to a song. 所述动作判断模块与一多媒体播放模块相连接,所述多媒体播放模块根据所述动作判断模块的触发来切换播放歌曲。 The action determination module and a multimedia play module is connected to the multimedia player module to play songs according to the switching operation to trigger the judging module.

[0023] 请参阅图6,根据上述构思,本实施例通过摄像头模拟重力感应器,实现左右甩动手机切换MP3歌曲的流程如图6所示,其步骤描述如下: [0023] Referring to FIG. 6, according to the above concept, the present embodiment by gravity sensor analog camera, a mobile phone switching processes achieve about swinging MP3 songs shown in Figure 6, the steps described as follows:

[0024] 1)步骤101,开启摄像头; [0024] 1) Step 101, the camera is turned on;

[0025] 2)步骤102,捕获图像,图像大小为QCIF(176*144),以下图像大小单位均为像素; [0025] 2) step 102, the captured image, the image size is QCIF (176 * 144), the image size are measured in pixels;

[0026] 3)步骤103,将步骤102中所捕获的图像压缩为原图像1/16大小04*36),步骤102中原图像16 0*4)个像素点的Y分量平均值,对应于压缩后图像1个像素点的Y分量值; [0026] 3) in step 103, in step 102 the captured image is compressed original image size of 04 * 36 1/16), step 102 Central image 160 * 4) pixels in the Y component of the average value, corresponding to the compressed after the image is a Y component value of pixels;

[0027] 4)步骤104,在步骤103中压缩后图像的子图像(44*36)中采用完全匹配方法,找到其YUV数据中Y分量的SAD最小的匹配块,并记录其在压缩后图像中的左上角起始坐标位置; [0027] 4) Step 104, the sub-image after compression in step 103 (44 * 36) using the exact match approach finds its YUV data Y component SAD minimum matching block, and to record its image after compression the upper-left corner coordinates in the starting position;

[0028] 5)步骤105,根据步骤104中已经找到的在压缩后图像中匹配块的左上角起始坐标位置,确定原图像(176*144)中所对应的(4*4)区域; [0028] 5) a step 105. The upper-left corner coordinates of the starting position in the compressed image matching block has been found in step 104, it is determined (4 * 4) area of ​​the original image (176 * 144), corresponding to a;

[0029] 6)步骤106,在原图像中对应的0*4)区域中,查找SAD最小的匹配区域,并保存该匹配区域相对于前一帧图像匹配区域的相对位移;[0030] 7)重复步骤102至步骤106,摄像头不断地捕获图像数据,得到当前帧图像相对于前一帧图像的连续位移数据,步骤107,每次取前10帧(含当前帧)图像的位移数据; [0029] 6) Step 106, 0 * 4) corresponding to a region in the original image, find SAD minimum matching area, and stores the matching area relative displacement of the previous frame image matching section relative; [0030] 7) Repeat step 102 to step 106, the camera continuously captures the image data, to obtain a current frame image with respect to the continuous displacement of the previous frame image data, step 107, each taking front 10 (including the current frame) of the image displacement data;

[0031] 8)左甩动作的定义:先向左移动或带一定角度逆时针旋转,然后基本上按照原有路径返回; [0031] 8) define left swing operation: first moved to the left or counter-clockwise rotation with a certain angle, and then returned in the original path substantially;

[0032] 随机取手机向左甩动并返回过程中的X轴位移数据所形成的数组: [0032] Mobile randomly swinging to the left and returns an array of X-axis displacement data during the formed:

[0033]数组 1 : {23,27,28,32, -4,21,27,15,3, -5,4, -7,-16,-16,8, -35,-30} [0033] 1 array: {23,27,28,32, -4,21,27,15,3, 5,4, -7, -16, -16,8, -35, -30}

[0034]数组 2 : {11,15,-14,17,20,22,10,-5,3, _6,-12, -11,6, -9,-11,4, -12} [0034] Array 2: {11, 15, -14,17,20,22,10, 5,3, _6, 12, -11,6, -9, -11,4, -12}

[0035] 通过分析以上2个数组,我们发现,在手机左甩的过程中,位移数据先是出现比较连续的正数,然后是一段比较连续的负数,其中会有少许数据干扰; [0035] Through the above analysis two arrays, we found that during the phone thrown left, the first displacement data comparing continuous positive number appears, and then was a relatively continuous negative, where there will be little interference data;

[0036] 分别对数组1和数组2每三个连续的位移数据取平均值,形成新的数组如下: [0036] are averaged for each of three successive displacement data array 1 and array 2, a new array is formed as follows:

[0037]数组 3 : {26,29,19,16,15,21,15,4,1,_3,-6,-13,-8,-14,-19} [0037] Array 3: {26,29,19,16,15,21,15,4,1, _3, -6, -13, -8, -14, -19}

[0038]数组 4 : {4,6,8,20,17,9,3,-3,-5,-10,-6,-5,-5,-5,-6} [0038] Array 4: {4,6,8,20,17,9,3, -3, -5, -10, -6, -5, -5, -5, -6}

[0039] 从数组3和数组4得出左甩规律:位移数据由连续的正数逐渐转变为连续的负数; [0039] array from the array 3 and 4 stars left rejection rule: displacement data gradually from successive positive number of consecutive negative;

[0040] 9)右甩动作的定义:先向右移动或带一定角度顺时针旋转,然后基本上按照原有路径返回; Definitions [0040] 9) the operation of the rejection of the right: first moved to the right or clockwise with a predetermined angle, and then returned in the original path substantially;

[0041] 随机取手机向右甩动并返回过程中的X轴位移数据所形成的数组: [0041] Mobile randomly swinging to the right and returns an array of X-axis displacement data during the formed:

[0042]数组 5 : {-22,-14,-10,4, -21, -14, -19, -10,6, _4,12,10,22,19,20,3,16} [0042] 5 array: {-22, -14, -10,4, -21, -14, -19, -10,6, _4,12,10,22,19,20,3,16}

[0043]数组 6 : {-10, -16,-10,7, -20, -15, -12, -22, —14,6,13,19,24,12,-6,8,12} [0043] Array 6: {-10, -16, -10,7, -20, -15, -12, -22, -14,6,13,19,24,12,} -6,8,12

[0044] 通过分析以上2个数组,我们发现,在手机右甩的过程中,位移数据先是出现比较连续的负数,然后是一段比较连续的正数,其中会有少许数据干扰; [0044] Through the above analysis two arrays, we found that in the process of rejection of the right of the phone, the first displacement data appear more consecutive negative, then was a relatively continuous positive where there is little data interference;

[0045] 分别对数组5和数组6每三个连续的位移数据取平均值,形成新的数组如下: [0045] are averaged for each of three successive displacement data array 5 and 6 array, a new array is formed as follows:

[0046]数组 7 :{-15,-7,-9,-10, -18, -14, _8,_3,5,6,15,17,20,14,13} [0046] Array 7: {--15, -7, -9, -10, -18, -14, _8, _3,5,6,15,17,20,14,13}

[0047]数组 8 : {-12,-6,-8,-9,-16, -16, —16,—10,2,13,19,18,10,5,5} [0047] Array 8: {-12, -6, -8, -9, -16, -16, -16, -10,2,13,19,18,10,5,5}

[0048] 从数组7和数组8得出右甩规律:位移数据由连续的负数逐渐转变为连续的正数; [0048] derived from the array 7 and 8 Right array rejection rule: displacement data from a continuous negative gradually transformed into a continuous positive number;

[0049] 10)步骤108,确定手机左甩动作和右甩动作的判断标准; [0049] 10) in step 108, the rejection criteria determine the phone left and right swing operation of operation;

[0050] 每次取当前帧前10帧(含当前帧)图像的位移数据,其中: [0050] Each time taken before the current frame 10 (including the current frame) of the image displacement data, wherein:

[0051] 前5帧数据中有4帧以上(含4帧)数据为正数且均值大于某个正的经验值(例如,正的经验值为1),与此同时后5帧数据中有4帧以上(含4帧)数据为负数且均值小于某个负的经验值(例如,负的经验值为-1),若同时满足以上2个条件,则可判定手机在做左甩动作; [0051] 5 data before more than four (including 4) is a positive number and the data mean is greater than a positive experience (e.g., an empirical value of n), while the five data available 4 above (including 4) is negative and the data is less than the mean value of a negative experience (e.g., a negative experience -1), if two or more conditions are satisfied, the mobile phone can be determined to make the left dumped in operation;

[0052] 前5帧数据中有4帧以上(含4帧)数据为负数且均值小于某个负的经验值(例如,负的经验值为-1),与此同时后5帧数据中有4帧以上(含4帧)数据为正数且均值大于某个正的经验值(例如,正的经验值为1),若同时满足以上2个条件,则可判定手机在做右甩动作; [0052] 5 data before more than four (including 4) is negative and the data is less than the mean value of a negative experience (e.g., a negative experience -1), while the five data available 4 above (including 4) is a positive number and the data mean is greater than a positive experience (e.g., an empirical value of n), if the above two conditions satisfied, it is judged that the right phone doing rejection operation;

[0053] 11)步骤109,根据所判定的手机左甩或右甩动作,触发MP3歌曲向前或向后切换播放; [0053] 11) in step 109, the mobile phone according to the determined left and right rejection or rejection operation, trigger switch MP3 music play forward or backward;

[0054] 其中,上述步骤中,采集多组位移数据,建立数学模型如下:[0055] a.每次取当前帧前η帧(含当前帧)图像的位移数据,其中η为大于或等于10的正偶数; [0054] wherein the above steps, the displacement acquired plurality of sets of data, a mathematical model as follows: [0055] a time to take η frames (including the current frame) of the image displacement data before the current frame, wherein η is greater than or equal to 10. the positive even number;

[0056] b.前η/2帧数据中有80%帧以上(含80%帧)数据为正数且均值大于某个正的经验值,与此同时,后η/2帧数据中有80%帧以上(含80%帧)数据为负数且均值小于某个负的经验值,则可以判断物体在做向左的相对运动或者类似的一种稳定运动趋势; [0056] b. Before η / 2 frame data frame over 80% (including 80% of the frame) data is positive and the mean is greater than a positive experience, at the same time, the η / 2 data frame 80 % or more frames (frames containing 80%) less than the average data is negative and a negative experience, the object can be determined relative movement in the left or like a stable movement trend;

[0057] c.前η/2帧数据中有80%帧以上(含80%帧)数据为负数且均值小于某个负的经验值,与此同时,后η/2帧数据中有80%帧以上(含80%帧)数据为正数且均值大于某个正的经验值,则可以判断物体在做向右的相对运动或者类似的与上述b中相反的另一种稳定运动趋势; [0057] c. Before η / 2 frame data frame over 80% (contained 80% of the frame) data is negative and less than the mean value of a negative experience, at the same time, the η / 2 data frame 80% frame above (containing 80% frame) data is positive and the mean is greater than a positive experience, it can be determined in the object or to the right relative movement similar to the above b opposite of one another stable movement trend;

[0058] d.根据建立的数学模型,做出相应的动作判断,触发相应的应用。 [0058] d. According to the mathematical model, make the appropriate action determination, it triggers the corresponding application.

[0059] 以上所述仅为本发明的较佳可行实施例,并非限制本发明的保护范围,凡运用本发明说明书及附图内容所做出的等效结构变化,均包含在本发明的保护范围内。 [0059] The foregoing is only preferred embodiments of the present invention are possible, not limit the scope of the present invention, where the use of the present specification and drawings made equivalent structural changes are included in the protection of the present invention range.

Claims (6)

1. 一种摄像头模拟重力感应器的方法,其特征在于,包括以下步骤: 一摄像头捕获图像;压缩所捕获图像形成一压缩子图,在压缩子图中查找YUV数据中Y分量的SAD最小的匹配块,并记录在压缩子图中的坐标位置,依据获取的坐标位置,确定所捕获图像中对应的区域;在所述区域中查找SAD最小的匹配区域,并记录相对于前一帧图像匹配区域的相对位移;重复以上步骤获取当前帧前η帧图像的位移数据; 根据获取的位移数据进行相应动作的判断。 A camera analog gravity sensor method, comprising the steps of: a camera capturing an image; compressing the captured image to form a compressed sub-picture, look for the YUV data in the Y component in the compressed subgraph SAD smallest matching block, and records the compressed sub-coordinate position of the figure, based on the acquired coordinate position determining region corresponding to the captured image; find the smallest SAD matching area in the region, and before recording an image matching with respect to relative displacement of the region; repeating the above steps η frame image displacement data acquired before the current frame; the determination of the displacement of the corresponding operation of the data acquisition.
2.如权利要求1所述的方法,其特征在于,η为大于或等于10的正偶数。 2. The method according to claim 1, characterized in that, [eta] is a positive even number greater than or equal to 10.
3.如权利要求1所述的方法,其特征在于,根据获取的位移数据形成数组,建立动作的判定标准。 The method according to claim 1, wherein the array is formed according to the acquired displacement data, the operation of establishing criteria.
4.如权利要求3所述的方法,其特征在于,数组前η/2帧数据中有多数帧数据为正数且均值大于某个正的经验值,与此同时,后η/2帧数据中有多数帧数据为负数且均值小于某个负的经验值,则判断在做第一种运动。 4. The method according to claim 3, characterized in that the front array η / 2 data frame a majority of the frame data is positive and the mean is greater than a positive experience, at the same time, the η / 2 frame data in a majority of the frame data is less than the mean negative and a negative experience, it is first determined in doing exercise.
5.如权利要求3所述的方法,其特征在于,数组前η/2帧数据中有多数帧数据为负数且均值小于某个负的经验值,与此同时,后η/2帧数据中有多数帧数据为正数且均值大于某个正的经验值,则判断在做与上述第一种运动相对的第二种运动。 5. The method according to claim 3, characterized in that the front array η / 2 data frame a majority of the frame data is less than the mean negative and a negative experience, at the same time, the η / 2 data frame a majority of the frame data is positive and the mean is greater than a positive experience, it is determined to make the above-described first and second motion opposite to the motion.
6.如权利要求1所述的方法,其特征在于,所述摄像头设置在电子装置上,所述电子装置包括一用以处理位移数据的微处理器。 6. The method according to claim 1, wherein said camera is disposed on an electronic device, said electronic device comprises a microprocessor for processing the displacement data.
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