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Adaptive 3D measuring device and information acquiring device

A technology of acquisition device and measurement device, which is applied in the direction of measurement device, optical device, image communication, etc., can solve the problems that 3D images cannot be synthesized, the accuracy is difficult to use for measurement, and it is difficult to focus accurately, so as to improve the effect and stabilize the composite image performance, prevent collection speed from slowing down, and guarantee effects and stability

Active Publication Date: 2019-01-04
天目爱视(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the outline of the object is not circular, or because the center of rotation of the camera is difficult to completely coincide with the center of the object, it is difficult for h(x) to be completely equal to H, which will make it difficult to focus accurately during the rotation process, resulting in 3D images that cannot be synthesized, or There is a large error in the synthesis, resulting in inaccurate 3D measurement
This technical problem has not been mentioned by the prior art. The main reason is that the usual way can synthesize 3D models for display, but its accuracy is difficult to use for measurement
In other words, the above-mentioned limitations in use hinder the discovery of this technical problem, and no one has mentioned the 3D composite effect and measurement accuracy problems that may be caused by the irregular contour of the object.
no attempt to solve the technical problem

Method used

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  • Adaptive 3D measuring device and information acquiring device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In order to solve the above technical problems, an embodiment of the present invention provides an adaptive 3D information acquisition / measurement device. Such as figure 1 As shown, it specifically includes: a rail 101 , an image acquisition device 201 , a processing unit 100 , a rotation device 102 , and a displacement device 202 .

[0042] The image acquisition device 201 is installed on the displacement device 202, and the displacement device 202 is installed on the rotation device 102. The rotation device 102 can move along the track 101, thereby driving the image acquisition device 201 to rotate around the target object.

[0043] The image acquisition device 201 can be a camera, a video camera, a CCD, or a CMOS, and it can be equipped with various lenses as required, such as an infrared lens, a visible light lens, a telephoto lens, a wide-angle lens, a macro lens, and the like.

[0044] Taking the image acquisition device as a camera as an example:

[0045] Sinc...

Embodiment 2

[0053] In order to solve the above technical problem, an embodiment of the present invention provides an adaptive 3D information acquisition device. It specifically includes: a track 101 , an image acquisition device 201 , a processing unit 100 , and a rotating device 102 . Since the object distance between the image acquisition device 201 and the target object varies in different regions during the rotation process, it may be difficult to focus accurately during the rotation process. In addition to using the method of adaptively changing the object distance in Embodiment 1, the focal length of the image acquisition device 201 can also be adjusted so that accurate focusing can be achieved under the new object distance.

[0054] When at a certain position A1, the distance measuring device 203 measures the distance between the image acquisition device 201 and a target area to be H1, and the focal length of the lens is F1 at this time; when the image acquisition device 201 is loc...

Embodiment 3

[0060] Although there are unevenness in different areas of the target, the degree of unevenness is low. If the method of Embodiment 1 or 2 is adopted at this time, the time for adaptive adjustment will be longer, which is not conducive to rapid acquisition and measurement. During the rotation process, the distance measuring device 203 measures the distance (object distance) h(x) from the camera 201 to the object in real time, and sends the measurement result to the processing unit 100, and the processing unit 100 searches the object distance-focal distance table to find the corresponding focal length value, send a focusing signal to the camera 201, and control the ultrasonic motor of the camera to drive the lens to move for fast focusing. In this way, fast focusing can be achieved without adjusting the position of the image acquisition device 201 or adjusting the focal length of its lens to ensure that the pictures taken by the image acquisition device 201 are clear. This is a...

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Abstract

The present invention provides an adaptive 3D measuring device and related devices. The measuring device comprises an image acquisition device, an adaptive unit, a processing unit, and a measuring unit. The image acquisition device is used for collecting one group of images of a target object by relative movement between the image acquisition device and the target object. The adaptive unit is usedfor adjusting the image acquisition device during the relative movement process according to the distance between the image acquisition device and the target object, thereby obtaining a clear image of the target object. The processing unit is used for acquiring 3D information of the target object according to multiple images in the one group of images. The measuring unit is used for measuring thegeometric size of the target object according to a calibrated dimension and the 3D information of the target object. According to the invention, solutions with a mobile camera, re-focusing, and automatic focusing are put forward for the first time in the 3D measurement field, so that a problem of poor 3D synthesis effect caused by one-time focusing in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of 3D measurement of objects, in particular to the technical field of 3D acquisition of objects by using images and measurement of geometric dimensions such as length. Background technique [0002] At present, 3D acquisition / measurement equipment is mainly aimed at a specific object. After the object is determined, the camera rotates around the object to collect multiple photos of the object, thereby synthesizing the 3D image of the object, and using the 3D point cloud data to measure the length and contour of the object. [0003] However, in this device, the camera focus misalignment that may be caused by the unevenness of the object contour is not considered, which leads to the problems that the 3D image cannot be synthesized and the 3D measurement is inaccurate. Since the existing equipment needs to use the camera to focus on the object before measurement / acquisition, and shoot with this focal length duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00H04N13/218H04N13/296
CPCG01B11/00G01B11/02G01B11/24H04N13/218H04N13/296
Inventor 左忠斌左达宇
Owner 天目爱视(北京)科技有限公司
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