CN102706331A - Correction method for aerial surveying and mapping images - Google Patents

Correction method for aerial surveying and mapping images Download PDF

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CN102706331A
CN102706331A CN2012102081856A CN201210208185A CN102706331A CN 102706331 A CN102706331 A CN 102706331A CN 2012102081856 A CN2012102081856 A CN 2012102081856A CN 201210208185 A CN201210208185 A CN 201210208185A CN 102706331 A CN102706331 A CN 102706331A
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image
distance
points
aerial
point
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CN2012102081856A
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CN102706331B (en
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林威
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神翼航空器科技(天津)有限公司
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Abstract

The invention discloses a correction method for aerial surveying and mapping images, which comprises the following steps: setting two reference points in a to-be-measured area, and measuring the horizontal distance between the two points; measuring idealistic distance between two final image points in a final image corresponding to a target scale according to the target scale and the obtained horizontal distance; carrying out aerial photography for to-be-measured area, butting the obtained images so as to obtain an integral original image of the to-be-measured area, and measuring the actual distance between two original image points; and calculating the ratio of the idealistic distance to the actual distance to scale the original image according to the ratio, so as to obtain the final image. Due to the adoption of the method provided by the invention, the image of the target scale can be obtained without conforming to the accurate aerial photography height, accordingly, the precision requirement for the aerial photography height is reduced, and the operation is simpler.

Description

航拍测绘图像校正方法 Aerial mapping an image correction method

技术领域 FIELD

[0001] 本发明涉及航拍测绘领域,尤其是一种适用于无人机以及载人机使用的航拍测绘图像比例校正方法。 [0001] The present invention relates to the field of aerial mapping, particularly suitable for unmanned aerial vehicles and manned aerial mapping machine image scale correction method.

背景技术 Background technique

[0002] 航拍又称空中摄影或航空摄影,是指从空中拍摄地球地貌,获得俯视图。 [0002] Also known as aerial aerial photography or aerial photography, topography means that the Earth taken from the air, to get a top view. 现阶段,航拍技术已经被普遍运用于各个领域,对于不同的领域,拍摄所要求的效果也不尽相同。 Stage, aerial technology has been widely used in various fields, for the different areas, shooting the desired effect are not the same. 如大型群体活动、电视、电影、城市安防巡视,通常要求清晰稳定的实时视频图像,而且拍摄时需要定点拍摄,因此使用直升机航拍较为适宜;对于土地监测、森林防火、电力巡线等,也是要求清晰稳定的实时视频图像,由于巡逻的范围比较大,因此,使用固定翼无人机效率会高一些,需定点监测时,一般使用盘巡实现监测。 Such as large group activities, television, film, urban security patrol, usually require clear and stable real-time video images, but also fixed-point shooting shooting, so using helicopter aerial photography is more appropriate; for land monitoring, forest fire prevention, power line patrol, etc., is required real-time video image clear and stable, due to the relatively large range of patrol, therefore, the use of fixed-wing UAV efficiency will be higher, take sentinel surveillance, the general use of the disc achieved patrol monitoring.

[0003] 对于测绘、交通勘测设计、水利勘测设计、小城镇规划设计等,需要得到可以用以制作地图的、有严格比例尺和精度要求的照片,目前还是以无人机为主,以载人机为辅,其中无人机包括固定翼无人机和无人直升机。 [0003] For the mapping, traffic survey and design, water conservancy survey and design, planning and design of small towns, may need to be used to produce maps, photos and strict accuracy requirements of the scale, it is still dominated by drone-based, manned supplemented machines, including fixed wing UAVs and wherein the UAV unmanned helicopter. 该领域采用的固定翼无人机具有平飞速度快、效率高的特点,并且机身小巧、结构简单,由人工遥控送飞,地面工作站操控自主飞行拍摄;直升机可以垂直起降,能够进行空中悬停、侧飞、后退飞等动作,很少受到场地起降的限制,在建筑物周围的也能安全飞行拍摄;另一方面,直升机飞行速度可以很慢,从而保证重叠率较高的航拍,并且其飞行高度低,适合拍摄高清晰度的航拍图片,进而更能保证测绘的精确性。 The use of fixed-wing UAV with fast field level speed, high efficiency characteristics, and the compact body, the structure is simple, remote manually feeding fly, ground stations autonomous flight control shooting; helicopter can take off and land vertically, air can be hover, side fly, fly back such action, rarely restricted landing site, the shooting can safely fly around the building; on the other hand, the helicopter flight speed can be very slow, so as to ensure a high rate of overlapping aerial and its low altitude, for shooting high-resolution aerial images, and thus better ensure the accuracy of mapping.

[0004] 在无人机或者载人机上安装数码相机飞行,通过保证重叠率的航拍和简单的软件拼图,获得一个区域大致地貌的影像图,方便快捷。 [0004] installed on UAVs or manned aircraft flight digital cameras, by ensuring that the aerial and simple software puzzle overlap rate, obtained a video showing the schematic topography of the region, convenient and quick. 同时,还可以根据所要取得影像图的比例尺,预先设定飞机航拍高度,例如取得比例尺为1:200的影像图的航拍高度为188米,或者取得比例尺为1:500的影像图,航拍高度为2000米(上述比例尺与航拍高度的对应值仅为实例,不代表二者之间绝对对应的唯一值)。 At the same time, also according to the scale to be achieved by the image of FIG set in advance aircraft aerial height, for example, to obtain a scale of 1: aerial height of an image map 200 is 188 m, or to obtain a scale of 1: image map 500, the aerial height 2000 m (above the aerial height dimensions corresponding values ​​are merely examples and do not represent a unique value corresponding to the absolute therebetween).

[0005] 然而,在实际拍摄过程中,飞机航拍的高度在现有的技术中并不能准确地定位在预设的海拔高度上,航拍高度的误差导致最终获取的影像图的比例尺也存在着一定的误差;另一方面,在获取较小比例尺的情况下,飞机航拍的高度会较高,而较高的航拍高度则意味着所拍摄图像的精度会有所下降,使得最终取得的影像图中的具体区域(例如建筑物、道路、河流等)边缘处颗粒较大,导致界限模糊不清,如果为了得到清晰的图像而降低飞行高度,则无法得到最初比例尺的影像图。 [0005] However, in the actual shooting, the height of the aircraft aerial not accurately positioned in a predetermined elevation in the prior art, the height of the aerial leads an error image acquired FIG final dimensions there are certain the error; on the other hand, in the case of acquiring a smaller scale, highly aerial aircraft will be higher, and higher aerial height means that the captured image accuracy will decline, making the final image maps acquired the specific areas (such as buildings, roads, rivers, etc.) at the edge of larger particles, resulting in blurred boundaries, if in order to obtain a clear image and lower altitude, you can not get the original image map scale.

[0006] 同时,在无人机或者载人机上同时安装激光测距仪,在航拍的过程中同时测量无人机或者载人机距地面的距离,当航拍高度准确地定位在预设的基准海拔高度上时,则能够根据激光测距仪所测得的距离,计算得出地面的海拔高度。 [0006] Meanwhile, on the UAV or manned aircraft to install a laser rangefinder, a manned aircraft or unmanned aerial vehicle while measuring the distance from the ground during aerial, when aerial highly accurately positioned at a preset reference when the altitude, the laser range finder can be measured from the ground altitude is calculated. 例如,飞机航拍基准海拔高度为2000米,激光测距仪测得飞机距地面的距离为1150米,则能够得出地面上该点的海拔高度为850米,进而在测绘地图中能够将该点的海拔高度予以标示。 For example, aerial airplane altitude of 2000 m benchmark, laser rangefinder aircraft from the ground a distance of 1150 meters, it is possible to obtain the altitude of the point on the ground is 850 meters, and then be able to point in the mapping map altitude to be marked. 但由于飞机航拍的高度在现有的技术中并不能始终保持在预设的基准海拔高度上,有可能飞行中某段区域内高于或低于预设的基准海拔高度,因此所测得的地面海拔高度也存在着一定的误差,无法得到准确的地面海拔高度数据。 However, due to the height of the aircraft in aerial and existing technology can not remain on the preset reference altitude, there may be a certain period of flight above or below a preset reference area of ​​altitude, and therefore the measured ground altitude there are some errors, you can not get an accurate ground elevation data.

发明内容 SUMMARY

[0007] 本发明要解决的技术问题是提供一种在不要求准确航拍高度的情况下,即可获得目标比例尺的影像图的航拍测绘图像校正方法 [0007] The present invention is to solve the technical problem of providing a precise aerial height without requiring the case, to obtain a target image of FIG scale aerial mapping an image correction method

[0008] 为解决上述问题,本发明的一种航拍测绘图像校正方法,包括以下步骤: [0008] To solve the above problem, one aerial mapping image correction method of the present invention, comprising the steps of:

[0009] I)在被测区域内设置至少两个参照点,所述参照点位于对被测区域进行航拍时起始端,并且所述参照点能够同时被摄入航拍的第一张图片内; [0009] I) is provided in the area to be measured at least two reference points, the reference point located at the top when the measured aerial region, and the reference point can be simultaneously taken up into a first aerial images;

[0010] 2)测量任意两个参照点之间的水平距离; [0010] 2) the horizontal distance measured between any two reference points;

[0011] 3)根据目标比例尺以及步骤2)中测得的两个参照点之间的水平距离,推算出在与该目标比例尺对应的最终影像图中两个最终影像点之间的应然距离,其中最终影像点为参照点在最终影像图中所对应的影像; [0011] 3) The horizontal distance between the two reference points and the target dimensions in step 2) is measured, and then calculate the distance between the final image to be the target of FIG scale image corresponding to the final two points wherein the final image point in the final image as a reference point in the image corresponding to FIG;

[0012] 4)对被测区域进行航拍; [0012] 4) the measured area aerial;

[0013] 5)测量步骤2)中的两个参照点在第一张图片内的两个原始影像点之间的实然距离; [0013] 5) the Real measurement step 2 the distance between two reference points in the images of the two original points in the first picture);

[0014] 6)计算步骤3)中获得的两个最终影像点之间的应然距离与步骤5)中获得的两个原始影像点之间的实然距离的比值,并根据该比值对第一张图片进行缩放,从而得到第一张图片所拍摄区域的目标比例影像图; [0014] 6) calculated in step 3) and step Ought distance between two points in the final image obtained in 5), then the ratio of the real distance between two points obtained in the original image, based on the ratio of the first and an image to zoom to give the first picture of the target area ratio of image maps taken;

[0015] 7)以步骤6)中得到的第一张图片所拍摄区域的目标比例影像图作为基准图,对航拍所获取的其他图片进行缩放拼接,从而得到最终影像图。 [0015] 7) the ratio of the target region in the image of FIG. Step 6) obtained in the first picture taken as a reference to FIG, other aerial images acquired zoom splicing, to yield the final image of FIG.

[0016] 一种航拍测绘图像校正方法,包括以下步骤: [0016] An aerial image mapping correction method, comprising the steps of:

[0017] I)在被测区域内设置至少两个参照点; [0017] I) at least two reference points within the area to be measured;

[0018] 2)测量任意两个参照点之间的水平距离; [0018] 2) the horizontal distance measured between any two reference points;

[0019] 3)根据目标比例尺以及步骤2)中测得的两个参照点之间的水平距离,推算出在与该目标比例尺对应的最终影像图中两个最终影像点之间的应然距离,其中最终影像点为参照点在最终影像图中所对应的影像; [0019] 3) The horizontal distance between the two reference points and the target dimensions in step 2) is measured, and then calculate the distance between the final image to be the target of FIG scale image corresponding to the final two points wherein the final image point in the final image as a reference point in the image corresponding to FIG;

[0020] 4)对被测区域进行航拍,并对航拍获取的图片进行拼接,从而取得整体的该被测区域的原始影像图,各参照点在该原始影像图中的影像为原始影像点; [0020] 4) the measured region aerial, and the aerial image obtained by stitching, to obtain the original image map of the entire measurement region, the reference image each point in the original image is an original image in FIG point;

[0021] 5)测量步骤2)中的两个参照点所对应的两个原始影像点之间的实然距离; [0021] 5) the Real measurement step 2 the distance between two reference points of the two original images corresponding points);

[0022] 6)计算步骤3)中获得的两个最终影像点之间的应然距离与步骤5)中获得的两个原始影像点之间的实然距离的比值,并根据该比值对原始影像图进行缩放,从而得到最终影像图。 [0022] 6) the ratio of the distance between the Real two points in the original image obtained in the calculating step 3) and step Ought distance between two points in the final image obtained in 5), and based on the ratio of the original FIG scaled image to produce the final image of FIG.

[0023] 所述参照点为发光源。 [0023] The reference point light source.

[0024] 所述参照点设置有GPS定位装置,从而能够通过GPS定位装置获得的各参照点经纬度信息,计算各参照点之间的水平距离。 [0024] The reference point is provided with a GPS positioning means, it is possible through the reference point GPS latitude and longitude information obtained by the positioning means, calculating the horizontal distance between the reference points.

[0025] 还包括对被测区域航拍测绘图像海拔高度进行校正的步骤,包括: [0025] further comprising the step of mapping aerial image of the measured altitude correction region, comprising:

[0026] I)通过各个参照点设置的GPS定位装置获取相邻的两个参照点C、D以及C、D之间位于地面上的任一点E的海拔高度Xp x2、X3 ;[0027] 2)采集飞机飞行至步骤I)中所述两个参照点C、D、E上空时所测得的飞机距地面的距离I^hyh3 ; [0026] I) GPS positioning means provided by the respective reference point acquired altitude Xp x2 positioned on the ground any point E between the two adjacent reference points C, D, and C, D, X3; [0027] 2 ) aircraft to collect in step I) the two reference points C, D, measured from the ground when the aircraft E over a distance I ^ hyh3;

[0028] 3)根据步骤I)中获得的两个参照点C、D的海拔高度Xl、X2以及步骤2)中所测得的飞机距地面的距离4、h2,计算得出飞机飞至所述两个参照点上空时的海拔高度yi、y2 ; [0028] 3) The distance from the ground 2) two reference points in step I) obtained in C, the altitude Xl D, X2 and a step measured aircraft 4, h2, calculated to fly the aircraft said two elevations above a reference point when yi, y2;

[0029] 4)测量两个参照点C、D之间的距离S1以及参照点C至点E之间的距离S2 ; [0029] 4) two measuring reference points C, D between the distance S1 and the distance between the reference point C to point E S2;

[0030] 5)以yi为飞机航拍的基准海拔高度,通过公式计算点飞机飞至点E上空时距地面的修正距离h3',所述公式为: [0030] 5) In the reference aerial yi aircraft altitude, a corrected distance h3 from the ground while flying over the point E to point the aircraft is calculated by the formula ', the formula is:

[0031] [0031]

Figure CN102706331AD00061

[0032] 并通过该修正距离h3'计算得出点E的正确海拔高度。 [0032] and by the correction distance h3 'correct altitude calculated point E.

[0033] 采用本发明的航拍测绘图像校正方法,与现有技术相比具有以下有益效果:(I)在无需按照准确航拍高度的情况下,即可获得目标比例尺的影像图,降低了对飞机航拍高度的精度要求,使操作更加简易;(2)根据两个最终影像点之间的应然距离与两个原始影像点之间的实然距离的比值,对原始影像图进行缩放,从而得到最终影像图,有效提高了航拍测绘的比例精度,减小误差;(3)由于飞机的航拍高度不受目标比例尺的限制,因此能够在较低的低空对被测区域进行拍摄,取得较为清晰的航拍图像,从而提高最终影像图的图像精度;(4)本发明的航拍测绘图像比例校正方法,步骤简单,便于实施,可操作性较强。 [0033] The present invention aerial image correction mapping method, compared with the prior art has the following advantageous effects: (I) without the need for accuracy in accordance with the height of the aerial, to obtain the target image of FIG scale, reduces the aircraft aerial height accuracy, make the operation more simple; (2) according to the ratio between the real distance then the distance should be between two and then the final image points and two points of the original image, the original image of FIG scaled to obtain FIG final image, improve the accuracy of scale aerial mapping, to reduce the error; (3) As the aircraft aerial target height scale is not limited, it is possible to shoot the measured region at a lower altitude, to obtain a clearer aerial images, thereby improving the accuracy of the final image of the image map; aerial mapping image scale correction process (4) of the present invention, the step is simple, easy to implement, strong operability.

附图说明 BRIEF DESCRIPTION

[0034] 图I为本发明实施例一中的被测区域示意图。 [0034] FIG I present in the measurement region of the diagram of a embodiment of the invention.

[0035] 图2为本发明实施例一中的原始影像图。 [0035] FIG. 2 a view of the original image in the embodiment of the present invention.

[0036] 图3为本发明实施例一中的最终影像图。 [0036] Fig 3 a view of the final image in the embodiment of the present invention.

[0037] 图4为本发明实施例三中飞机对地面进行测距时的示意图。 [0037] FIG. 4 is a schematic of the aircraft when on the ground according to a third embodiment of the present invention for ranging.

具体实施方式 Detailed ways

[0038] 为了使本技术领域的人员更好地理解本发明技术方案,下面结合附图和实施方式对本发明作进一步的详细说明。 [0038] In order to make those skilled in the art better understand the technical solution of the present invention, in conjunction with the accompanying drawings and the following embodiments described in detail further embodiment of the present invention.

[0039] 实施例一: [0039] Example a:

[0040] 本发明的一种航拍测绘图像比例校正方法,包括以下步骤: [0040] An aerial image mapping proportional correction method of the present invention, comprising the steps of:

[0041] I)在被测区域内设置两个参照点,该参照点能够在航拍得到的影像图中被清楚地识别;图I为本实施例中的被测区域示意图,如图I所示,在被测区域内,分别设置有两个识别点A和B,所述识别点为发光源,从而使其能够在航拍影像图中清楚地被识别; [0041] I) is provided in the area to be measured two reference points, the reference point can be clearly identified in FIG aerial image obtained; Figure I embodiment in a schematic view of the test area, the present embodiment shown in FIG. I , in the area to be measured, there are provided two identification points A and B, the identification point light source, so that it can be clearly identified in the aerial image in FIG;

[0042] 2)测量所述两个参照点A、B之间的水平距离L ;所述参照点分别设置有GPS定位装置,从而能够通过GPS定位装置获得的各参照点经纬度信息,并根据各参照点经纬度信息计算参照点A、B之间的水平距离L ; [0042] 2) Measurement of the two reference points A, B between the horizontal distance L; the reference points are provided with a GPS positioning device, the reference points can be latitude and longitude information obtained by the GPS positioning means, and in accordance with various latitude and longitude information calculating reference points reference points a, B the distance between the level L;

[0043] 3)根据目标比例尺以及步骤2)中测得的两个参照点A、B之间的水平距离L,推算出在与该目标比例尺对应的最终影像图中两个最终影像点A2、B2之间的应然距离L2,其中最终影像点A2、B2为参照点A、B在最终影像图中所对应的影像,参见图3 ; [0043] 3) The horizontal distance L between the target scale and step 2) measured in two reference points A, B, calculate two final image point A2 in the final image corresponding to the scale of FIG target, However, the distance should be between B2 L2, wherein the final image points A2, B2 as the reference points a, B in the final image in the image corresponding to FIG., see figure 3;

[0044] 4)对被测区域进行航拍,并对航拍获取的图片进行拼接,从而取得整体的该被测区域的原始影像图,参见图2 ;其中,参照点A、B在该原始影像图中的影像为原始影像点A:、B1; [0044] 4) the measured area aerial, and the aerial image obtained by stitching, to obtain the original image of FIG entire measurement region, see FIG. 2; wherein the reference points A, B in the original image of FIG. the image is an original image point a:, B1;

[0045] 5)测量所述两个参照点A、B在原始影像图中所对应的两个原始影像点A1A1之间的实然距离L1 ; [0045] 5) Measurement of the two reference points A, then the real distance between the two original images L1 A1A1 B points in the original image corresponding figures;

[0046] 6)计算步骤3)中推算出的两个最终影像点A2、B2之间的应然距离L2与步骤5)中获得的两个原始影像点A:、B1之间的实然距离L1的比值,并根据该比值对原始影像图进行缩放,从而得到最终影像图。 [0046] 6) deduced calculation step 3) in two points the final image A2, ought to be two points of the original image A and the distance L2 in step 5) is obtained between the B2:, the distance between the Real B1 L1 ratio, and scaling the original image in accordance with the ratio in FIG, to obtain the final image of FIG.

[0047] 例如,目标比例尺为1:2000,即对被测区域进行测绘并最终得到比例尺为1:2000的最终影像图。 [0047] For example, the target scale of 1: 2000, i.e. mapping the measured area and eventually the scale of 1: 2000 of the final image of FIG. 首先在被测区域内设置两个参照点A、B,测得A、B之间的水平距离L为500米;根据目标比例尺1:2000以及测得的两个参照点A、B之间的水平距离L,推算出在与该目标比例尺对应的最终影像图中两个最终影像点A2、B2之间的应然距离L2为25cm ;对被测区域进行航拍,并对航拍获取的图片进行拼接,从而取得整体的该被测区域的原始影像图,其中,参照点A、B在该原始影像图中的影像为原始影像点ApB1,并且测得原始影像点ApB1之间的实然距离L1为50cm ;计算应然距离L2与实然距离L1的比值,即L2Zl1=I/^并根据该比值对原始影像图进行缩放,即将原始影像图缩小至原来的1/2倍,从而得到最终影像图。 A first set two reference points in the area to be measured, between the level B, measured at A, B the distance L is 500 m; the target scale 1: 2000 and measured between two reference points A, B of the horizontal distance L, in the final image of FIG calculate the scale corresponding to the target ought final image between two points A2, B2 is a distance L2 25cm; splicing region of the aerial measured, and the acquired aerial image , to obtain the overall view of the original image area to be measured, wherein the reference points a, B of the original image in the image is the original image in FIG point aPb1, and the measured distance L1 between the solid and then the original image is a point aPb1 50cm; calculating a distance L2 and the distance L1 of the real ought ratio, i.e. L2Zl1 = I / ^, and scaling the original image in accordance with the ratio in FIG, i.e. the original image of FIG reduced to 1/2 of the original, to thereby obtain final image of FIG. .

[0048] 实施例二: [0048] Example II:

[0049] 一种航拍测绘图像校正方法,包括以下步骤: [0049] An aerial image mapping correction method, comprising the steps of:

[0050] I)在被测区域内设置至少两个参照点,所述参照点位于对被测区域进行航拍时起始端,并且所述参照点能够同时被摄入航拍的第一张图片内; [0050] I) is provided in the area to be measured at least two reference points, the reference point located at the top when the measured aerial region, and the reference point can be simultaneously taken up into a first aerial images;

[0051] 2)测量任意两个参照点之间的水平距离; [0051] 2) the horizontal distance measured between any two reference points;

[0052] 3)根据目标比例尺以及步骤2)中测得的两个参照点之间的水平距离,推算出在与该目标比例尺对应的最终影像图中两个最终影像点之间的应然距离,其中最终影像点为参照点在最终影像图中所对应的影像; [0052] 3) The horizontal distance between the two reference points and the target dimensions in step 2) is measured, and then calculate the distance between the final image to be the target of FIG scale image corresponding to the final two points wherein the final image point in the final image as a reference point in the image corresponding to FIG;

[0053] 4)对被测区域进行航拍; [0053] 4) the measured area aerial;

[0054] 5)测量步骤2)中的两个参照点在第一张图片内的两个原始影像点之间的实然距离; [0054] 5) the Real measurement step 2 the distance between two reference points in the images of the two original points in the first picture);

[0055] 6)计算步骤3)中获得的两个最终影像点之间的应然距离与步骤5)中获得的两个原始影像点之间的实然距离的比值,并根据该比值对第一张图片进行缩放,从而得到第一张图片所拍摄区域的目标比例影像图; [0055] 6) calculated in step 3) and step Ought distance between two points in the final image obtained in 5), then the ratio of the real distance between two points obtained in the original image, based on the ratio of the first and an image to zoom to give the first picture of the target area ratio of image maps taken;

[0056] 7)以步骤6)中得到的第一张图片所拍摄区域的目标比例影像图作为基准图,对航拍所获取的其他图片进行缩放拼接,从而得到最终影像图。 [0056] 7) the ratio of the target region in the image of FIG. Step 6) obtained in the first picture taken as a reference to FIG, other aerial images acquired zoom splicing, to yield the final image of FIG.

[0057] 所述参照点为发光源。 [0057] The reference point light source.

[0058] 所述参照点设置有GPS定位装置,从而能够通过GPS定位装置获得的各参照点经纬度信息,计算各参照点之间的水平距离。 [0058] The reference point is provided with a GPS positioning means, it is possible through the reference point GPS latitude and longitude information obtained by the positioning means, calculating the horizontal distance between the reference points.

[0059] 实施例三: [0059] Example III:

[0060] 一种航拍测绘图像校正方法,包括实施例一或实施例二中所述的步骤,还包括对被测区域航拍测绘图像海拔高度进行校正的步骤,包括: [0060] A mapping image correction method, comprising the step of Example a or the Example II embodiment, further comprising the step of correcting the image of the measured field altitude aerial mapping, aerial comprising:

[0061] I)通过各个参照点设置的GPS定位装置获取相邻的两个参照点C、D的海拔高度 [0061] I) GPS positioning means provided by the respective reference point acquired two adjacent reference points C, D, altitude

X1' X2 ;[0062] 2)在C、D之间位于地面上的设定任一需要校正海拔高度的点E,当飞机飞至两个参照点C、D以及点E上空时的位置为c、d、e,采集飞机飞行至C、d、e所测得的飞机距地面的距离H h3,即图3中的点c到点C、点d到点D、点e到点E的距离分别为Hh3; X1 'X2; [0062] 2) located on the ground according to any setting between C, D a need to correct the altitude of point E, when the position of the aircraft to fly to the above two reference points C, D and Point E is c, d, e, collecting aircraft to aircraft C, d, e the measured distance from the ground H h3, 3 point c to point C in FIG i.e., point d to point d, point E, point e distances of HH3;

[0063] 3)根据步骤I)中获得的两个参照点C、D的海拔高度Xl、X2以及步骤2)中所测得的飞机距地面的距离4、h2,计算得出C、d两点的海拔高度yi、y2 ; [0063] 3) the distance from the ground 4, h2, calculated C, d 2 according to two) in step I) obtained in the two reference points C, the altitude Xl D, X2 and aircraft measured in step height above sea point yi, y2;

[0064] 4)测量两个参照点C、D之间的距离S1以及参照点C至点E之间的距离S2 ; [0064] 4) two measuring reference points C, D between the distance S1 and the distance between the reference point C to point E S2;

[0065] 5)以yi为飞机航拍的基准海拔高度,通过公式计算点飞机飞至点E上空时距地面的修正距离h3',所述公式为: [0065] 5) In the reference aerial yi aircraft altitude, a corrected distance h3 from the ground while flying over the point E to point the aircraft is calculated by the formula ', the formula is:

[0066] [0066]

Figure CN102706331AD00081

[0067] 并通过该修正距离h3'计算得出点E的正确海拔高度。 [0067] and by the correction distance h3 'correct altitude calculated point E.

Claims (5)

1. 一种航拍测绘图像校正方法,包括以下步骤: 1)在被测区域内设置至少两个参照点,所述参照点位于对被测区域进行航拍时起始端,并且所述参照点能够同时被摄入航拍的第一张图片内; 2)测量任意两个参照点之间的水平距离; 3)根据目标比例尺以及步骤2)中测得的两个参照点之间的水平距离,推算出在与该目标比例尺对应的最终影像图中两个最终影像点之间的应然距离,其中最终影像点为参照点在最终影像图中所对应的影像; 4)对被测区域进行航拍; 5)测量步骤2)中的两个参照点在第一张图片内的两个原始影像点之间的实然距离; 6)计算步骤3)中获得的两个最终影像点之间的应然距离与步骤5)中获得的两个原始影像点之间的实然距离的比值,并根据该比值对第一张图片进行缩放,从而得到第一张图片所拍摄区域的目标比例影像图; 7)以步骤6)中得 An aerial mapping image correction method, comprising the steps of: a) providing at least two reference points within the test area, the test area of ​​the starting end of the aerial when the reference point is located, and simultaneously the reference point He was ingested within a first aerial images; level between 2) any two reference points measured distance; 3) based on the horizontal distance between two reference points and the target dimensions in step 2) is measured, calculate in FIG final image to the target scale corresponding to the distance between the two ought final image points wherein a final image point in the final image as a reference point in the image corresponding to FIG.; 4) the measured area aerial; 5 ) However, the real distance between two reference points measured in step 2) in two points in the original image of the first image; ought between two points in the final image 6) obtained in the calculating step 3) from step 5 ratio) real natural distance between two points in the original image is obtained, and based on the zoom ratio of the first picture, the first picture to obtain the target scale view of the area photographed image; 7) in step 6) to give 到的第一张图片所拍摄区域的目标比例影像图作为基准图,对航拍所获取的其他图片进行缩放拼接,从而得到最终影像图。 The first picture to the target scale image map areas taken as a reference map, aerial images of other acquired zoom spliced ​​to produce the final image maps.
2. 一种航拍测绘图像校正方法,包括以下步骤: 1)在被测区域内设置至少两个参照点; 2)测量任意两个参照点之间的水平距离; 3)根据目标比例尺以及步骤2)中测得的两个参照点之间的水平距离,推算出在与该目标比例尺对应的最终影像图中两个最终影像点之间的应然距离,其中最终影像点为参照点在最终影像图中所对应的影像; 4)对被测区域进行航拍,并对航拍获取的图片进行拼接,从而取得整体的该被测区域的原始影像图,各参照点在该原始影像图中的影像为原始影像点; 5)测量步骤2)中的两个参照点所对应的两个原始影像点之间的实然距离; 6)计算步骤3)中获得的两个最终影像点之间的应然距离与步骤5)中获得的两个原始影像点之间的实然距离的比值,并根据该比值对原始影像图进行缩放,从而得到最终影像图。 An aerial mapping image correction method, comprising the steps of: a) providing at least two reference points within the area to be measured; level between 2) any two reference points measured distance; 3) based on the target dimensions and Step 2 ) the horizontal distance between the two reference points is measured, and then calculate the distance should be between two points in the final image to the final image of FIG scale corresponding to the target, wherein the final image point in the final image as a reference point FIG image corresponding; 4) the measured area aerial, and the aerial image obtained by stitching, to obtain the original image of FIG entire measurement region, the reference points in the image in the original image is a figure original image points; real natural distance between two points of the original image 5) the step of measuring two reference points 2) corresponding; ought final image between two points 6) obtained in the calculating step 3) 5) and the step ratio of the distance between the real distance then the two points obtained in the original image, and scaling the original image in accordance with the ratio in FIG, to obtain the final image of FIG.
3.如权利要求I或2所述的航拍测绘图像校正方法,其特征在于:所述参照点为发光源。 I aerial mapping image correction method according to claim 2, wherein: the reference point light source.
4.如权利要求I或2所述的航拍测绘图像校正方法,其特征在于:所述参照点设置有GPS定位装置,从而能够通过GPS定位装置获得的各参照点经纬度信息,计算各参照点之间的水平距离。 4. I or aerial mapping an image correction method according to claim 2, wherein: the reference point is provided with a GPS positioning means, it is possible through the reference point obtained by the GPS positioning apparatus latitude and longitude information calculated for each of the reference points horizontal distance between.
5.如权利要求4所述的航拍测绘图像校正方法,其特征在于:还包括对被测区域航拍测绘图像海拔高度进行校正的步骤,包括: 1)通过各个参照点设置的GPS定位装置获取相邻的两个参照点C、D以及C、D之间位于地面上的任一点E的海拔高度Xp x2、X3 ; 2)采集飞机飞行至步骤I)中所述两个参照点C、D、E上空时所测得的飞机距地面的距离Vhyh3 ; 3)根据步骤I)中获得的两个参照点C、D的海拔高度xi、x2以及步骤2)中所测得的飞机距地面的距离4、h2,计算得出飞机飞至所述两个参照点上空时的海拔高度yi、y2 ;4)测量两个参照点C、D之间的距离S1以及参照点C至点E之间的距离s 2 ; 5)以yl为飞机航拍的基准海拔高度,通过公式计算点飞机飞至点E上空时距地面的修正距离h3',所述公式为: 5. The aerial mapping an image correction method according to claim 4, characterized in that: further comprising the step of correcting the measured field altitude aerial mapping image, comprising: 1) GPS positioning means provided by the respective reference point acquisition phase any point E located on the ground between two adjacent reference points C, D, and C, D altitude Xp x2, X3; 2) collecting aircraft flight to step I), the two reference points C, D, when measured over a distance from the ground plane E Vhyh3; 3) according to two reference points in step I) obtained in C, the altitude xi D, x2 and in step 2) in the measured distance from the ground plane 4, h2, calculated to the two aircraft to fly at altitudes yi over the reference point, y2; 4) two measuring reference points C, D S1, and the distance between the reference point C to point E between the distance s 2; 5) to the reference aerial yl aircraft altitude, by the equation corrected distance h3 from the ground when the flight calculation point to point E over the plane ', the formula is:
Figure CN102706331AC00031
并通过该修正距离h3'计算得出点E的正确海拔高度。 And by the correction distance h3 'correct altitude calculated point E.
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