An auxiliary positioning device and positioning method for a multi-camera acquisition system

Abstract

The present invention belongs to the technical field of three-dimensional imaging, and particularly relates to an auxiliary positioning device for a multi-camera acquisition system, comprising: a base, a dial fixedly disposed at the center of the base, a plurality of identical columns uniformly distributed around the dial on the base in a curved shape, height scales being configured on the columns, a height gauge further being provided on the columns, the height gauge being slidably connected to the columns, the height gauge including a chute slidably connected to the column, a direction finder rotatably connected to the chute, and a positioning device fixedly disposed on the direction finder; by providing a dial on the base, height scales on the columns, and a protractor on the height gauge, and by means of the position and direction of the laser line emitted by the laser pointer, the above-mentioned position, distance, and angle are ingeniously associated, enabling the columns and the cameras to be positioned efficiently and quickly without the need for staff guidance, greatly improving the flexibility of the camera array and having very high practicality.

Description

Technical Field

[0001] The present invention belongs to the technical field of three-dimensional imaging, and particularly relates to an auxiliary positioning device and a positioning method for a multi-camera acquisition system. Background Art

[0002] With the development of machine vision and three-dimensional imaging technologies, 3D image modeling is applied in more and more scenarios, such as movie special effects, cultural relic protection, film and television production, animation games, motion capture and other fields. 3D image modeling mainly collects images of a sample object from multiple angles and in all directions. Often, hundreds or thousands of images need to be collected for one object. Image acquisition is the premise of machine vision and three-dimensional imaging systems, and the quality and method of image acquisition affect the imaging effect. In order to obtain a better imaging effect, multiple cameras need to work simultaneously for acquisition. Therefore, a camera array is an important part of the acquisition system, and the demand for constructing a multi-camera array acquisition device is increasing.

[0003] Existing multi-camera array acquisition devices generally adopt a columnar structure or a dome structure, and the multi-cameras are installed on a bracket, and the optical axis of the cameras is aligned with the center of the sample object. The working distance and field of view of the camera system are related to the structure and position of the bracket. If you want to change the working distance of the camera system, you need to adjust parameters such as the structure and position of the bracket.

[0004] When installing and deploying the bracket and corresponding accessories, it is usually directly measured with a ruler. The installation structure on the bracket, the spacing and orientation between adjacent components will change according to the requirements of the acquisition system. The structure is slightly complex and there are many components. If directly measured with a ruler, the fixing accuracy of the bracket is limited and the installation and adjustment efficiency is low. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides an auxiliary positioning device and a positioning method for a multi-camera acquisition system, which can adjust the positions, working distances and optical axes of each camera according to actual needs.

[0006] One technical solution adopted by the present invention is: an auxiliary positioning device for a multi-camera acquisition system, including: a base, a protractor fixedly disposed at the center of the base, a plurality of identical columns uniformly distributed around the protractor on the base in a circular arc, height scales are configured on the columns, a height gauge is further provided on the columns, the height gauge is slidably connected to the columns, the height gauge includes a chute slidably connected to the columns, a direction finder rotatably connected to the chute, and a orientation device fixedly disposed on the direction finder.

[0007] Further, the orientation device is a laser, and the laser points to the center of the protractor.

[0008] Furthermore, the laser is specifically a detachable laser pen.

[0009] As an improvement, a protractor is further provided on the direction finder for measuring the included angle between the laser extension line and the column.

[0010] As a further improvement, the altimeter further includes a connecting portion, one side of the connecting portion is fixedly connected to the sliding groove, and the other side is rotatably connected to the direction finder.

[0011] Preferably, the connecting portion further includes a storage groove for storing the laser pen.

[0012] Preferably, the light of the laser pen is a cross-line laser.

[0013] A method for assisting positioning of a multi-camera acquisition system is applied to the above-mentioned assisting positioning device, and includes the following steps:

[0014] S1. Obtain the working distance WD of the camera and the included angle α of the direction finder;

[0015] S2. Calculate the height H on the column where the altimeter is located according to the formula: WD = H tanα;

[0016] S3. Place the altimeter on the corresponding scale on the column, turn on the laser pen to emit laser light, so that the center of the cross-line laser is aligned with the center of the angle scale, and complete the positioning of the reference column;

[0017] S4. Determine the number of cameras required according to the shooting requirements and the same overlap rate of the cameras in the horizontal direction;

[0018] S5. According to the shooting angle range θ, use the formula: Determine the direction included angle δ between adjacent cameras;

[0019] S6. According to the direction included angle δ, repeat step S3 to complete the positioning of the remaining columns.

[0020] An assisting positioning device and method for a multi-camera acquisition system according to the present invention, by providing an angle scale on the base, a height scale on the column, and a protractor on the altimeter, and by means of the position and direction of the laser line emitted by the laser pen, the above positions, distances, and angles are skillfully associated, enabling the column and the camera to be positioned efficiently and quickly without the need for staff guidance, greatly improving the flexibility of the camera array, and having very high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an assisting positioning device for a multi-camera acquisition system according to the present invention;

[0022] Figure 2 is a schematic diagram of the structure of the altimeter of an assisting positioning device for a multi-camera acquisition system according to the present invention;

[0023] Figure 3 Another perspective structural diagram of the altimeter of an auxiliary positioning device for a multi-camera acquisition system according to the present invention;

[0024] Figure 4 Another perspective structural diagram of the altimeter of an auxiliary positioning device for a multi-camera acquisition system according to the present invention;

[0025] Figure 5 Flow step block diagram of an auxiliary positioning method for a multi-camera acquisition system according to the present invention. Detailed implementation mode

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0027] Example 1:

[0028] As Figures 1-4 shown, an auxiliary positioning device for a multi-camera acquisition system includes: a base 1, a dial 11 fixedly arranged at the center of the base 1, and a plurality of identical columns 2 evenly distributed around the dial 11 in an arc on the base 1. The columns 2 are vertically fixed to the base 1 in a rod shape. Digital identification height scales 21 are provided on the rods of the columns 2 to identify the precise height of each point on the rods of the columns 2. The height scales 21 can adopt engraved scales or pasted scale rulers. Through digital identification, each camera can be quickly positioned on the rods of the columns 2.

[0029] An altimeter 3 is further provided on the column 2. The altimeter 3 is generally a fixture or a sleeve, and the altimeter 3 is slidably connected to the column 2. The altimeter 3 further includes a connecting portion 34. One side of the connecting portion 34 is fixedly connected to the sliding groove, and the other side is rotatably connected to the direction finder 31. The altimeter 3 includes a sliding groove slidably connected to the column 2, a direction finder 31 rotatably connected to the sliding groove, and an orientation device fixedly arranged on the direction finder 31. As a preferred embodiment, a protractor 33 is further provided on the direction finder 31 for measuring the angle between the laser extension line and the column 2.

[0030] Specifically, the orientation device is a laser, and the laser points to the center of the angle scale 11. As a preferred embodiment, the laser is specifically a laser pointer 32, and the laser pointer 32 is detachably mounted on the direction finder 31 through a mounting beam 36. Further, the light of the laser pointer 32 is a cross-line laser. By using the cross-line laser pointer 32 to emit a laser line with a cross division, align the center of the cross with the center of the circular target pattern, check the angle scale between the laser line in the radial direction and the pattern of the angle scale 11, and the direction angle of the current column 2 can be obtained. Move the height gauge 3 to the same height position of the other columns 2, and the directions of each column 2 can be specified with high precision, conveniently and efficiently. As a preferred embodiment, the connecting portion 34 further includes a storage groove 35 for storing the laser pointer 32.

[0031] When adjusting the position and direction of the column 2, turn on the laser pointer 32 to emit a laser spot. By using trigonometric functions and the scale corresponding to the position of the height gauge 3, the horizontal distance between the center of the laser spot and the current column 2 can be known, which is the working distance WD when the camera is installed at this position.

[0032] Keep the included angle between the direction finder 31 and the column 2 unchanged, that is, the included angle α of the direction finder 31 remains unchanged. Fix the height gauges 3 of different columns 2 at the same height position. If the centers of the spots are all located at the center of the angle scale 11, then all the columns 2 of the multi-camera acquisition system are located on an arc with the center of the circular target pattern as the center and the working distance as the radius at this time.

[0033] Embodiment 2

[0034] As Figure 5 shown, a method for assisting in positioning a multi-camera acquisition system is applied to the above-mentioned assisting positioning device, and includes the following steps:

[0035] S1. Obtain the working distance WD of the camera and the included angle α of the direction finder;

[0036] S2. Calculate the height H on the column where the height gauge is located according to the formula: WD = Htanα;

[0037] S3. Place the height gauge on the corresponding scale on the column, turn on the laser pointer to emit laser light, and make the center of the cross-line laser align with the center of the angle scale to complete the positioning of the reference column;

[0038] S4. Determine the number of cameras required according to the required shooting requirements and the same overlap rate of the cameras in the horizontal direction;

[0039] S5. According to the shooting angle range θ, use the formula: to determine the direction angle δ between adjacent cameras;

[0040] S6. Repeat step S3 according to the direction angle δ to complete the positioning of the remaining columns.

[0041] The present invention discloses an auxiliary positioning device and method for a multi-camera acquisition system. By arranging an angle disk on a base, a height scale on a column, and a protractor on a height meter, the above positions, distances, and angles are cleverly associated with each other by means of the position and direction of a laser line emitted by a laser pen, so that the column and the camera can be positioned efficiently and quickly without the need for guidance from a staff member, thereby greatly improving the flexibility of the camera array and having very high practicality.

[0042] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A method for assisting positioning of a multi-camera acquisition system, characterized in that: The auxiliary positioning method is completed by using an auxiliary positioning device, and the auxiliary positioning device includes: a base, a protractor fixedly disposed at the center of the base, a plurality of identical columns uniformly distributed around the protractor on the base in a circular arc, height scales configured on the columns, height gauges further provided on the columns, the height gauges being slidably connected to the columns, the height gauges including a chute slidably connected to the columns, a direction finder rotatably connected to the chute, and a laser fixedly disposed on the direction finder; The auxiliary positioning method includes the following steps: S1. Obtain the working distance WD of the camera and the angle α of the direction finder; S2. Calculate the height H on the column where the height gauge is located according to the formula: WD = Htanα; S3. Place the height gauge on the corresponding scale on the column, turn on the laser to emit laser light, and make the center of the laser light align with the center of the protractor to complete the positioning of the reference column; S4. Determine the number of cameras required according to the shooting requirements and the same overlap rate of the cameras in the horizontal direction; S5. According to the shooting angle range θ, use the formula: to determine the direction included angle δ between adjacent cameras; S6. According to the direction angle δ ， Repeat step S3 to complete the positioning of the remaining columns.

2. The auxiliary positioning method of the multi-view camera acquisition system according to claim 1, characterized in that The laser is specifically a detachable laser pen.

3. The multi-camera acquisition system-assisted positioning method according to claim 1, characterized in that A protractor is further provided on the direction finder for measuring the angle between the extension line of the laser and the column.

4. The auxiliary positioning method of the multi-camera acquisition system according to claim 2, wherein The height gauge further includes a connecting portion, one side of the connecting portion is fixedly connected to the chute, and the other side is rotatably connected to the direction finder.

5. The method for assisting positioning of the multi-camera acquisition system according to claim 4, wherein The connecting portion further includes a storage groove for storing the laser pen.

6. The auxiliary positioning method for a multi-camera acquisition system according to claim 2, characterized in that, The light of the laser pen is cross-line laser light.

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