CN102098442B - Method and system for calibrating non-overlap ratio of optical axis and visual axis of zoom camera - Google Patents

Method and system for calibrating non-overlap ratio of optical axis and visual axis of zoom camera Download PDF

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CN102098442B
CN102098442B CN201010603100A CN201010603100A CN102098442B CN 102098442 B CN102098442 B CN 102098442B CN 201010603100 A CN201010603100 A CN 201010603100A CN 201010603100 A CN201010603100 A CN 201010603100A CN 102098442 B CN102098442 B CN 102098442B
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image
camera
optical axis
visual axis
video
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CN102098442A (en
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熊文卓
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中国科学院长春光学精密机械与物理研究所
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Abstract

The invention discloses a method and system for calibrating the non-overlap ratio of an optical axis and a visual axis of a zoom camera, belonging to the technical field of television cameras, which solve the difficult problems that the non-overlap ratio of the optical axis and the visual axis of the zoom camera is not convenient to adjust manually by the existing mechanical method, and even can not be debugged on site. In the invention, the non-overlap ratio of the two axes is measured by a digital image processing method; and a start point of an image matrix is movably output at two directions of line and field in outputting to compensate the non-overlap ratio, so as to lead that the visual axis is overlapped with the optical axis. The method and system provided by the invention have the advantages of small volume, high reliability and the like, are simple and rapid in debugging, require no moving components, are especially suitable for the fields of aviation, spaceflight and military, have high requirements on the overlap ratio of the optical axis and the visual axis, have poor use environments, are not convenient or do not allow mechanical adjustment on site.

Description

变焦距摄像机光轴和视轴不重合度校准方法及其系统 Zoom camera optical axis and the visual axis misalignment calibration method and system

技术领域 FIELD

[0001] 本发明属于电视摄像机技术领域,具体涉及一种变焦距摄像机光轴和视轴不重合度校准方法及其系统。 [0001] The present invention belongs to the technical field of television cameras, particularly to a zoom camera optical axis and the visual axis misalignment calibration method and system.

背景技术 Background technique

[0002] 电视摄像机主要由光学镜头和面阵光电传感器组成,根据光学镜头焦距是否可变,分为定焦镜头和变焦距镜头。 [0002] Television camera by the optical lens and the main surface of a photosensor array consisting, according to whether the variable focal length optical lens, fixed focus lens and zoom lens divided. 变焦距镜头可改变视场角大小,在焦距短时,大视场,观察的范围也大,有利于发现和捕获目标;在焦距长时, 视场小,适合观察目标的细节或者远距离目标。 Zoom lens can change the size of the viewing angle, short focal length, wide field of view, the range of observation is large, to facilitate the detection and capture targets; at long focal length, a small field of view, the details of the observation target for a distant target or . 由于变焦距镜头具有以上优点,采用变焦距镜头的电视摄像机广泛地应用在航空、航天、兵器等领域,用于对远距离目标的测量、跟踪和定位等。 Since the zoom lens has the above advantages, the use of the zoom lens of a television camera widely used in aviation, aerospace, weapons and other fields, is used to measure distant targets, tracking and positioning.

[0003] 变焦距镜头的光轴是指从长焦到短焦之间镜头光学系统的中心线;与之对应,也把经过图像传感器输出图像中心且垂直于图像传感器靶面的直线定义为视轴。 [0003] The optical axis of the zoom lens from the center line refers to a telephoto lens optical system between the short focal; corresponding, also the output image after the image sensor and the center line defined perpendicular to the target surface of the image sensor visual axis. 正常情况下,电视摄像机在组装时,必须使光轴和视轴的不重合度小于规定的值,以保证变焦过程中图像中心的景物不发生较大偏离。 Normally, a television camera at the time of assembly, it is necessary that the optical axis and the visual axis do not coincide with less than the predetermined value, in order to ensure that the center of the scene during zooming is large deviation occurs.

[0004] 根据几何光学原理可知,如附图I所示,如果在短焦距时测得光轴与视轴在靶面上的偏差为A,则在放大倍率是短焦n倍的长焦位置时偏差为n A。 [0004] According to principles of geometric optics known as I shown in the accompanying drawings, if measured at the optical axis and the visual axis at the short focal length variation of the target surface is A, then the magnification is n times the short-focus position of the telephoto when the deviation is n A. 而如短焦距时A=O,则长焦位置的偏差nA = O。 While such a short focal distance A = O, the tele position deviation nA = O. 对于定位精度要求较高的光电测控仪器、火控系统以及宇宙飞船对接系统等,光轴与视轴的不重合度指标至关重要。 For high precision positioning optoelectronic monitoring and control equipment, fire control systems, and spacecraft docking systems, do not coincide with the optical axis of the index is crucial boresight.

[0005] 然而,由于时间、环境以及结构材料等因素的影响,在出厂时,精密校准的光轴和视轴一段时间后会产生或大或小的偏移,严重时,会影响设备的正常使用,必须进行重新校准。 [0005] However, due to the factors of time, environmental and structural material, at the factory, after the optical axis alignment and a precise period of time will produce the visual axis more or less offset severe, the device will affect the normal use must be recalibrated. 以往光轴与视轴的校准是采用机械的办法,需打开摄像机的外壳,通过人工反复凑试,直至将视轴与光轴调整到精度允许的范围内。 Conventional optical axis alignment with the visual axis is mechanical approach, need to open the casing of the camera, by repeated manual trial and error, until the visual axis and the optical axis is adjusted to the range of the allowable accuracy. 在设备现场,该调试方法比较麻烦,精度也很难保证,由于要进行机械拆卸调试和重新安装,对设备容易造成意外损坏,对设备外壳的防护性能如水密和气密影响很大,有些航天用光电设备甚至无法采用机械方法进行校准。 In the device site, the debugging method troublesome, it is difficult to ensure accuracy, due to the mechanical disassembly and re-commissioning installation, the equipment likely to cause accidental damage to the protective great performance of the device such as water and gas-tight housing impact, some aerospace optoelectronic devices can not even be calibrated mechanical means.

发明内容 SUMMARY

[0006] 为了解决现有技术采用常规机械方法,对光轴和视轴不重合度进行校准困难的问题,本发明提供一种变焦距摄像机光轴和视轴不重合度校准方法及其系统。 [0006] In order to solve the prior art method of using conventional mechanical, optical axis and the visual axis is difficult for misalignment calibration issues, the present invention provides a zoom camera optical axis and the visual axis misalignment calibration method and system.

[0007] 本发明解决技术问题所采用的技术方案如下: [0007] Solving the Problems The present invention adopts the following technical solution:

[0008] 变焦距摄像机光轴和视轴不重合度校准方法,包括如下步骤: [0008] and the optical axis of the zoom camera boresight misalignment calibration method, comprising the steps of:

[0009] 第一步、将需要校准的摄像机的输出端与调整电路连接,调整电路的输出与电视监视器连接,调整摄像机与远处目标的位置,使电视监视器能够看到摄像机所获取的目标图像; [0009] In a first step, the output terminal needs to be calibrated with the camera adjustment circuit, the adjustment circuit output connected to the television monitor, adjust the position of the camera with a distant target, so that the camera can see the television monitor acquired target image;

[0010] 第二步、在摄像机的变焦距镜头调节为长焦距时,将摄像机的视轴对准远处目标的形心,通过调整电路计算出目标形心与视轴的距离并叠加到图像上通过电视监视器显示出来,对准后,将目标与摄像机的相对位置固定;[0011] 第三步、将摄像机的变焦距镜头转到短焦距端,通过调整电路计算出目标形心与视轴的偏差△即为光轴与视轴的不重合度,并通过非易失型RAM存储该偏差A ; [0010] The second step, when the zoom focal length of the camera is adjusted, the visual axis of the camera is aligned with the centroid of the target distance, the target centroid is calculated by the visual axis from the adjustment circuit and superimposed to the image out on the display on the TV monitor, after the alignment, the relative position of the target and the camera is fixed; [0011] a third step, the zoom lens of the camera to short focal length end, and calculates the target centroid of view by adjusting the circuit △ is the axis deviation of the optical axis and the visual axis misalignment, and stores the deviation a non-volatile by the RAM;

[0012] 第四步、调整电路通过视频解码器将摄像机的图像传感器传来的视频图像信号解码成固定帧格式的数字视频流; [0012] The fourth step, the adjustment circuit the decoded video signal coming from the image sensor of the camera into a digital video stream frame format is fixed by a video decoder;

[0013] 第五步、调整电路通过数字图像处理器将由视频解码器输入的数字图像信号读入并按从左到右、从上到下的循序以固定格式存入图像存储器; [0013] The fifth step, the digital image signal by a digital image processor adjusting circuit by the video decoder reads input press left to right, top to bottom of the image stored in the memory sequentially in a fixed format;

[0014] 第六步、调整电路通过数字图像处理器从非易失型RAM中读取第三步存入的偏差A,根据该偏差A修正图像输出的起始点,再从该起始点按顺序从图像存储器中读取图像数据向视频编码器发送,最后由视频编码器向外输出完成光轴与视轴校准的视频图像。 [0014] The sixth step, the third step adjustment circuit reads the stored deviation from the non-volatile RAM A by a digital image processor, according to the start point of the corrected image A output deviation, and then sequentially from the start point reading image data from the image memory is transmitted to the video encoder, the final output video to complete the optical axis alignment of the visual axis outwardly by the video encoder.

[0015] 变焦距摄像机光轴和视轴不重合度校准系统,包括调整电路和电视监视器,调整电路与需要校准的摄像机的图像传感器连接,调整电路对所述图像传感器输出的视频信号自动进行实时校准处理;电视监视器与调整电路连接,显示经过所述调整电路校准的摄像机所获取的目标图像。 [0015] and the optical axis of the zoom camera boresight misalignment calibration system, comprising adjusting circuit and a television monitor, the image sensor adjusting circuit connected to the camera needs to be calibrated, the output adjusting circuit of the image sensor video signal automatically real-time calibration process; adjustment circuit is connected to the television monitor, the display adjusting circuit of the destination image acquired by a camera calibration.

[0016] 上述调整电路包括视频解码器、数字图像处理器、图像存储器、非易失型RAM和视频编码器,所述数字图像处理器分别与视频解码器、图像存储器、非易失型RAM、视频编码器连接;所述视频解码器将摄像机的图像传感器传来的视频图像信号解码成固定帧格式的数字视频流,所述数字图像处理器将由视频解码器输入的数字图像信号读入并按从左到右、从上到下的循序以固定格式存入图像存储器;所述非易失型RAM存储光轴与视轴的不重合度;数字图像处理器根据光轴与视轴的不重合度修正图像输出的起始点,并从该起始点顺序从图像存储器中读取图像数据向视频编码器发送,最后由视频编码器向外输出完成光轴与视轴校准的视频图像。 [0016] The adjusting circuit includes a video decoder, a digital image processor, image memory, non-volatile RAM and a video encoder, the digital image processor and a video decoder, respectively, the image memory, non-volatile RAM, video encoder connected; decoded video signal of the image sensor an image of the video camera of the decoder into a digital video stream coming from the fixed frame format, the digital image signal processor, the digital image input by the video decoder reads the press left to right, top to bottom of the image stored in the memory sequentially in a fixed format; non-volatile RAM memory of the optical axis and the visual axis misalignment; digital image processor according to the optical axis does not coincide with the visual axis of the the starting point of the corrected image output from the video image and to complete the optical axis alignment of the visual axis of the start point of image data sequentially read from the image memory is transmitted to the video encoder, the final output from the outside by the video encoder.

[0017] 本发明的有益效果是:在电视摄像机使用现场不对设备进行任何拆卸,完全利用电路完成高精度的光轴视轴自动校准;具有体积小、调试简单快速、无任何运动部件、可靠性高、对设备外壳无破坏等突出优点;特别适合航空、航天以及军事领域对光轴与视轴重合度要求高,且环境恶劣却不便于或不允许现场进行机械调整的场合如气密和外层空间等。 [0017] Advantageous effects of the present invention are: the use of television cameras in the field device does not make any disassembly circuit performs full advantage of the optical axis with high accuracy automatic calibration visual axis; with small, quick easy adjustment, without any moving parts, reliability high, highlight the advantages of the apparatus housing without damage and the like; particularly suitable for high aviation, aerospace, and military fields of view of the optical axis of the axle degree requirement, and is not easy to harsh environments or mechanical adjustments allowed site as the occasion and an outer gastight floor space.

附图说明 BRIEF DESCRIPTION

[0018] 图I是现有技术的光轴与视轴不重合度示意图。 [0018] FIG. I is a schematic diagram of the prior art optical axis and the visual axis do not coincide.

[0019] 图2是本发明变焦距摄像机光轴和视轴不重合度校准系统的结构框图。 [0019] FIG. 2 of the present invention is a zoom camera optical axis and the visual axis structure diagram of the calibration system do not coincide.

[0020] 图3是本发明中的调整电路的结构框图。 [0020] FIG. 3 is a block diagram of the adjustment circuit of the present invention.

[0021] 图4是本发明中的mXn像元矩阵示意图。 [0021] FIG. 4 is an mXn pixel matrix of the present invention. FIG.

[0022] 图5是将图4中的图像中心移到E点的像元矩阵示意图。 [0022] FIG. 5 in FIG. 4 is a shift in the center point E of the image pixel matrix is ​​a schematic diagram.

具体实施方式 detailed description

[0023] 下面结合附图和具体实施例对本发明做进一步详细说明。 [0023] conjunction with the accompanying drawings and the following specific examples further illustrate the present invention in detail.

[0024] 本发明变焦距摄像机光轴和视轴不重合度校准系统的调整过程按先后分为:不重合度的检测和不重合度校准两个步骤: [0024] The present invention is a zoom camera visual axis and the optical axis misalignment adjustment process according to a calibration system successively into: misalignment detection and calibration misalignment two steps:

[0025] 进行不重合度的检测:将摄像机的变焦距镜头处于最长焦位置,将图象中心对准无穷远处的一圆形或十字形靶标的形心,图像信号由图像传感器传到调整电路;然后,保持摄像机现有的位置不变,将变焦距镜头调至最短焦位置,此时计算出的坐标差即为光轴和视轴的不重合度偏差A。 [0025] The detecting misalignment: the zoom lens of the camera in the telephoto position, aligned with the center of the image at infinity or a circular cross-shaped target centroid, the image signal transmitted by the image sensor adjusting circuit; then held constant current position of the camera, the zoom lens is adjusted to the shortest focal position coordinate difference calculated at this time is the optical axis and the visual axis do not coincide with the deviation A.

[0026] 进行不重合度的校准:此步骤主要由调整电路完成,调整电路的组成结构如图3所示。 [0026] The misalignment calibration: This step is mainly done by the adjustment circuit, the adjustment circuit composition structure shown in Figure 3. 其工作原理是:由图像传感器传到调整电路的视频图像信号,首先经调整电路中的视频解码器解码成固定帧格式的数字视频流,数字图像处理器将由视频解码器输入的数字图像信号读入并按从左到右、从上到下的循序以固定格式存入图像存储器中,这样每帧图像在图像存储器中形成一个mXn的像元矩阵如图4所示。 Its working principle is: by the image sensor is transmitted to a video image signal adjusting circuit is first decoded into a digital video stream frame format is fixed in the adjusted video decoder circuit, a digital image processor the digital image signal by the video decoder reads input press the left to right, top to bottom in a fixed format sequentially stored in the image memory, so that each image forming in the image memory shown a mXn matrix of picture elements shown in Figure 4. 它的每个像元在图像中都有一个一一对应的位置。 Which each cell has a correspondence in the image position. 这里m为矩阵的列数,n为行数。 Where m number of columns in a matrix, n is the number of rows. 图像的第一行像素为:(0,0)(0,1)(0, The first row of pixels of the image: (0,0) (0,1) (0,

2)......(0,m)。 2) ...... (0, m). 第一列像素为:(1,0) (1,0) (2,0)......(n,0)。 The first column of pixels: (1,0) (1,0) (2,0) ...... (n, 0). 如果要将整帧图像输出, 贝_数字图像处理器按输入时的顺序:(0,0)-(0,1)......(0,m)-(l,0)......(n,m)从图 If you want to output the entire frame image, the digital image processor _ shell when the input sequence: (0,0) - (0,1) ...... (0, m) - (l, 0) .. .... (n, m) from FIG.

像存储器中读取图像数据,然后输出到视频编码器,由视频编码器按着原视频信号的制式解码输出。 Image memory read image data, and then output to the video encoder, the decoded output format of the original video signal by the video encoder pressing. 这时,在电视监视器中就可以看到与图像传感器输出相同的图像。 In this case, the television monitor can see the image sensor to output the same image. 而图4里女 The woman in Figure 4

所在的坐标为是图像的中心位置。 Where are the coordinates for the center of the image. 正常情况下,该点为视轴与图像传感器靶面的 Normally, the point of the image sensor boresight target surface

交点。 Intersection. 而图4中E为光轴与图像传感器祀面的交点坐标为(Y +_ 1 ^° FIG 4 E and the intersection coordinate in the optical axis of the image sensor surface is Si (Y + _ 1 ^ °

[0027] 如果调整电路输出图像时的起始点不从(0,0)开始而从(1,0)开始,由调整电路输出的图像与由图像传感器直接输出的图像相比,在电视监视器的屏幕上表现为向左移了 [0027] If the starting time of the adjustment circuit does not output image from the (0,0) starts from the beginning (1,0), compared to the image adjusting circuit outputs the image output by the image sensor directly in the television monitor performance on the screen to the left

I的画面。 I picture. 依此,我们可以如图5所示通过改变输出图像的起始点的方法将图4中的图像m So, we can change the method of starting the output image of the image shown in FIG. 4 m in FIG. 5

中心由★移到E点。 ★ moved to the center by the E point. 图5中读取图像的起始点为(1,_1),则由粗框包围的区域为光轴与视轴不重合度校正后的图像输出区域。 Starting reading the image in FIG. 5 as (1, _1), surrounded by a thick frame region of the optical axis does not coincide with the visual axis of the image output area after correction. 这样,由调整电路输出的视频图像就是光轴与视轴重合的了,实现了对光轴和视轴不重合度的校准。 Thus, by the adjusting circuit is output from the video image of the optical axis coincides with the visual axis, and to achieve the visual axis and optical axis misalignment calibration. 图5中的“ + ”是为了使输出满足图像帧格式要求而在图像矩阵中添加的像元,它们的值没有特殊要求,但为使图像边缘无明显突变,一般取其相邻实际所采集像素的值。 FIG. 5 "+" to the output format required to meet the added image frame in the image pixel matrix, their values ​​are no special requirements, but for the mutation had no image edge, whichever is generally adjacent the actually collected value of the pixel.

[0028] 在实际工作中,调整电路中的数字图像处理器每次输出图像时,都从非易失型RAM中读取先前存入的偏差△,修正图像输出的起始点;再从该起始点顺序读取图像数据向视频编码器发送,最后由视频编码器向外输出完成光轴与视轴校准的视频图像。 [0028] In practice, the adjustment circuit outputs a digital image processor each image are read into the offset △ previously, starting from the corrected image output from the non-volatile RAM; and then starting from the starting point sequentially read image data is transmitted to video encoder, the final output video to complete the optical axis alignment of the visual axis outwardly by the video encoder. 如图I所示,这时由于光轴与视轴的偏差A =0,光学镜头在长焦和短焦间变化时,位于图像中心的靶标形心在长焦和短焦位置都处在图像中心。 As shown in FIG I, this time due to the deviation of the visual axis and the optical axis A = 0, when the optical lens and a short focal variation between the telephoto, the center of the image centroid of the target and the telephoto position are at the short focal image center.

[0029] 具体实施例: [0029] Specific Example:

[0030] 图2中的目标是在无穷远处的目标,在室内可以采用平行光管来实现,在外场由于条件限制,可以是远距离的点状目标如天体、地面靶标等。 In [0030] FIG. 2 is a target in a target infinity, the indoor collimator can be employed to achieve, since the external field conditions, may be a point-like object such as a distant celestial body, the target surface and the like.

[0031] 具体实施步骤如下: [0031] In particular embodiments the steps of:

[0032] I)先将需要校准的电视摄像机,按图2连接好,保证可以通过电视监视器看到图像; [0032] I) the first television camera to be calibrated, connected according to Figure 2, to ensure that the image can be seen by a television monitor;

[0033] 2)使摄像机在变焦距镜头的长焦距时,视轴对准远处的目标的形心,这时调整电路计算出目标形心与视轴的距离并叠加到图像上通过电视监视器显示出来,供调试者参考,一般显示的数字单位为像素;对准后,将目标与电视摄像机的相对位置固定; [0033] 2) When the camera focal length of the zoom lens, the visual axis aligned centroid distant target, then the target adjusting circuit centroid distance is calculated with the visual axis of the image and superimposed on the television monitor It is displayed for reference debuggers, generally shown as the number of units of pixels; after the alignment, the relative position of the fixed target and a television camera;

[0034] 3)将变焦距镜头转到短焦距端,这时调整电路计算出的目标形心与视轴的差即为光轴与视轴的不重合度;由调整电路中的数字图像处理器存入非易失型RAM中,以备使用时调用,这样就完成了不重合度的测试; [0034] 3) a short focal length end to a zoom lens, then the calculated difference adjustment circuit is the misalignment of the optical axis and the visual axis of the target with the visual axis of the centroid; manufactured by adjusting the digital image processing circuit it is stored in non-volatile RAM in order to prepare for use calls, thus completing the test misalignment;

[0035] 4)在校准后,变焦距电视摄像机正常工作时,由图像传感器输出的视频信号进入调整电路;调整电路自动进行实时校准处理,然后再用与图像传感器相同的制式输出,完成光轴与视轴的实时校准。 When [0035] 4) After calibration, work television camera zoom, a video signal output from the image sensor into the adjustment circuit; automatic adjusting circuit for real-time calibration process, and then use the same standard output of the image sensor, the optical axis is completed calibration and real-time visual axis.

[0036] 图3中的视频解码器的型号可以是TVP5150PBS,数字图像处理器的型号可以是TMS320DM642,图像存储器的型号可以是HY57V283220T,非易失型RAM的型号可以是AM29LV033C,第二视频编码器的型号可以是SAA7121H。 In [0036] FIG 3 the video decoder model may be TVP5150PBS, a digital image processor models can be TMS320DM642, the image memory may be a model HY57V283220T, non-volatile RAM may be a model AM29LV033C, the second video encoder the model can be SAA7121H.

Claims (2)

1.变焦距摄像机光轴和视轴不重合度校准方法,其特征在于,该方法包括如下步骤: 第一歩、将需要校准的摄像机的输出端与调整电路连接,调整电路的输出与电视监视器连接,调整摄像机与远处目标的位置,使电视监视器能够看到摄像机所获取的目标图像; 第二步、在摄像机的变焦距镜头调节为长焦距时,将摄像机的视轴对准远处目标的形心,通过调整电路计算出目标形心与视轴的距离并叠加到图像上通过电视监视器显示出来,对准后,将目标与摄像机的相对位置固定; 第三步、将摄像机的变焦距镜头转到短焦距端,通过调整电路计算出目标形心与视轴的偏差△即为光轴与视轴的不重合度,并通过非易失型RAM存储该偏差Λ ; 第四步、调整电路通过视频解码器将摄像机的图像传感器传来的视频图像信号解码成固定帧格式的数字视频流; 第五歩、 1. Zoom camera optical axis and the visual axis misalignment calibration method, wherein the method comprises the steps of: a first ho, the camera needs to be calibrated adjustment circuit connected to the output terminal, an output adjusting circuit television surveillance connection, adjusts the position of the camera with a distant target, the television monitor to see that the object image acquired by a camera; the second step, when the zoom focal length of the camera is adjusted, the visual axis of the camera is aligned away at the centroid of the target, by adjusting the circuit calculates a target with the visual axis of the centroid distance and superimposed onto the image displayed on the TV monitor, after the alignment, the relative position of the target and the camera is fixed; the third step, the camera short focal length end of the zoom lens to calculate the deviation between the target with the visual axis of the centroid △ is the misalignment of the optical axis and the visual axis by the adjustment circuit, and by storing the non-volatile RAM Lambda deviation; fourth step, the image sensor video signal by the video decoder adjusting circuit of the camera coming into a digital video stream decoding a fixed frame format; ho fifth, 调整电路通过数字图像处理器将由视频解码器输入的数字图像信号读入并按从左到右、从上到下的循序以固定格式存入图像存储器; 第六歩、调整电路通过数字图像处理器从非易失型RAM中读取第三步存入的偏差Δ,根据该偏差Λ修正图像输出的起始点,再从该起始点顺序从图像存储器中读取图像数据向视频编码器发送,最后由视频编码器向外输出完成光轴与视轴校准的视频图像。 Adjusting the digital image signal input through the circuit by the digital image processor reads the video decoder press left to right, top to bottom of the image stored in the memory sequentially in a fixed format; ho sixth adjustment circuit by a digital image processor the third step is read from the non-volatile RAM stores a deviation [Delta],, then read from the image memory according to the order starting from the start point of the deviation Λ corrected image data output from the image transmitted to the video encoder, and finally outputted from the optical axis of the video encoder and the video image is completed outwardly boresight calibration.
2.实现权利要求I所述变焦距摄像机光轴和视轴不重合度校准方法的系统,包括调整电路和电视监视器,调整电路与需要校准的摄像机的图像传感器连接,调整电路对所述图像传感器输出的视频信号自动进行实时校准处理;电视监视器与调整电路连接,显示经过所述调整电路校准的摄像机所获取的目标图像;其特征在于,所述调整电路包括视频解码器、数字图像处理器、图像存储器、非易失型RAM和视频编码器,所述数字图像处理器分别与视频解码器、图像存储器、非易失型RAM、视频编码器连接;所述视频解码器将摄像机的图像传感器传来的视频图像信号解码成固定帧格式的数字视频流,所述数字图像处理器将由视频解码器输入的数字图像信号读入并按从左到右、从上到下的循序以固定格式存入图像存储器;所述非易失型RAM存储光轴与视轴的不重合度 I 2. The implement as claimed in claim zoom camera optical axis and the visual axis do not coincide with the system of the calibration method, comprising adjusting circuit television monitors, adjusting the image sensor needs to be calibrated with the circuit connected to the camera, the image adjusting circuit video signal output from the sensor calibration process automatically in real-time; and the adjustment circuit connected to the television monitor, the display adjusting circuit of the destination image acquired by a camera calibration; wherein said adjusting circuit comprises a video decoder, a digital image processing , image memory, non-volatile RAM and a video encoder, respectively the digital image processor, image memory, non-volatile RAM, the video encoder connected to the video decoder; decoder the video images from the camera sensor decoded video signal into a digital video stream transmitted from a fixed frame format, the digital image signal processor, the digital image input by the video decoder reads the press from left to right, top to bottom in a fixed format sequentially stored in image memory; non-volatile RAM memory of the optical axis and the visual axis of misalignment 数字图像处理器根据光轴与视轴的不重合度修正图像输出的起始点,并从该起始点顺序从图像存储器中读取图像数据向视频编码器发送,最后由视频编码器向外输出完成光轴与视轴校准的视频图像。 The digital image processor the optical axis and the visual axis do not coincide with the start point of the corrected image output, and image data is read from the image memory in order from the start point to the video encoder transmits, to complete the final output by the video encoder outwardly visual axis alignment optical axis and the video image.
CN201010603100A 2010-12-24 2010-12-24 Method and system for calibrating non-overlap ratio of optical axis and visual axis of zoom camera CN102098442B (en)

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