Physical supporting platform for calibration of light field camera

Abstract

The utility model relates to a calibration device of a light field camera, a physical support platform for calibration of the light field camera, comprising a support for bearing the light field camera and a calibration assembly, the calibration assembly comprising a lifting device arranged right below the light field camera and a calibration piece arranged on the lifting device in an angle adjustable manner, therefore, the angle of the calibration piece and the distance between the light field camera and the calibration piece are adjusted. According to the invention, the light field camera can be installed on the support, and the calibration piece arranged right below the light field camera enables the definition of the calibration piece obtained by the light field camera to be consistent through angle adjustment. And the distance between the calibration piece and the light field camera is adjusted through the lifting device, so that the light field camera obtains external information in the shooting process to accurately calibrate the light field camera.

Description

Technical Field

[0001] This application relates to the field of light field imaging technology, and in particular to a physical support platform for light field camera calibration. Background Technology

[0002] With the tremendous development of computer science supported by cutting-edge technologies, light field imaging technology has found widespread application. Light field imaging systems can be implemented in various ways, including camera arrays, microlens arrays, masks, and objective lens arrays. Among these, microlens array light field cameras are the most cost-effective and are therefore widely used in academic research and commercial fields.

[0003] Light field cameras based on microlens arrays utilize the microlens array to defocus or re-image the image from the main lens, thereby encoding light angle information. Accurate calibration of the light field camera, enabling decoding, is fundamental to its many applications. The accuracy and stability of the calibration directly impact subsequent applications. Manufacturing and assembly errors, especially defects, in the microlens array production process can significantly deviate from the imaging results.

[0004] Therefore, how to realize a light field camera Acquire external information during the shooting process, thereby Accurate calibration of the light field camera is the technical problem that this application needs to solve. Utility Model Content

[0005] This application provides a physical support platform for calibrating a light field camera to solve the above-mentioned problems.

[0006] According to this application, a physical support platform for calibrating a light field camera is proposed, including a bracket for supporting the light field camera and a calibration component. The calibration component includes a lifting device disposed directly below the light field camera and a calibration element disposed on the lifting device at an adjustable angle to adjust the angle of the calibration element and the distance between the light field camera and the calibration element.

[0007] Preferably, the calibration component is mounted on the lifting device via an XY-axis pitch device.

[0008] Preferably, the light field camera is movably mounted on the bracket in the vertical direction.

[0009] Preferably, the bracket includes a base and a support portion, the support portion including a column mounted on the base and extending vertically upward, and a support platform located above the column and extending horizontally, the light field camera being mounted on the support platform.

[0010] Preferably, the light field camera is mounted on the support platform via a sliding mechanism.

[0011] Preferably, a light source is disposed below the calibration element and emits light toward the light field camera, wherein the light-emitting area of ​​the light source is larger than the calibration element.

[0012] Preferably, the surface of the calibration element has a checkerboard or circular grid structure.

[0013] Through this application, a light field camera can be mounted on a bracket, and a calibration component located directly below it can be adjusted at an angle to ensure that the light field camera obtains consistent clarity of the calibration component. Then, the distance between the calibration component and the light field camera can be adjusted by a lifting device, so that the light field camera can acquire external information during the shooting process to accurately calibrate the light field camera. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of a light field camera provided in an embodiment of this application. Detailed Implementation

[0018] To more clearly illustrate the specific implementation methods, technical solutions, and advantages of this application, this document will provide a detailed explanation of the technical solutions in conjunction with the relevant accompanying drawings. It should be noted that the implementation methods mentioned herein represent only some examples, not all. Based on these examples, any other implementation methods that can be deduced by those skilled in the art without innovative work should also be considered as the object of protection of this application.

[0019] This document discloses numerous different implementations or examples to demonstrate the diverse structures of this invention. In describing these specific examples, we have striven for simplicity, but these examples are not intended to limit the scope of this invention. Furthermore, for consistency and clarity of description, the same reference numerals and / or letters may be repeated in different examples; such repetition does not imply a direct connection between different examples or settings.

[0020] In the description, we may use terms describing spatial relative positions, such as "inside," "outside," "middle," "outer," "below," "below," "above," "front," and "back," to describe the relative position or motion state of one component or feature with another. These terms apply not only to the orientation shown in the illustration but also to different orientations that the device may take during use or operation. For example, if the device in the illustration flips, adjusts its posture, or changes its motion, the corresponding orientation indication will also change. For instance, a component originally described as "below other components or features" may become "above other components or features." Therefore, expressions like "below" can actually encompass both "above" and "below." The device can be oriented in different ways (e.g., rotated 90 degrees or other directions), and in such cases, the spatial relative relationship descriptions used in the text should be interpreted accordingly.

[0021] According to this application, a physical support platform for calibrating a light field camera is provided, such as... Figure 1 As shown, it includes a bracket for supporting a light field camera and a calibration component 3. The calibration component 3 includes a lifting device 3222 disposed directly below the light field camera and a calibration member 31 disposed on the lifting device 3222 at an adjustable angle to adjust the angle of the calibration member 31 and the distance between the light field camera and the calibration member 31.

[0022] In this application's technical solution, the light field camera 21 is mounted on a bracket and held directly above the lifting device 3222, enabling the light field camera 21 to capture a complete image of the calibration component 31. The lifting device 3222 can also be mounted on the bracket, or it can be mounted separately from the bracket, as long as the light field camera is positioned directly above the lifting device 3222. The calibration component 31 can be mounted on the lifting device 3222 in an adjustable manner, for example, through a universal joint structure, a multi-axis rotary platform structure, etc., without limitation. The lifting device 3222 can employ, for example, a vertically mounted slide table, a lead screw mechanism, etc., to precisely adjust the distance between the calibration component 31 and the light field camera 21.

[0023] In practical use, the light field camera 21 can be mounted on a bracket, so that the light field camera 21 faces the calibration member 31. By adjusting the angle of the calibration member 31, the image clarity of each position of the calibration member 31 in the light field camera 21 is consistent. The light field camera 21 takes a picture of the calibration member 31 at that position as the initial image. The calibration member 31 is moved up and down by the lifting device 3222. By comparing the pixel position of the calibration member 31 in each picture taken by the light field camera 21 with the pixel position of the calibration member 31 in the initial image, the light field camera is calibrated.

[0024] To stably and accurately adjust the pitch angle of the calibration component 31, according to a preferred embodiment, the calibration component 31 is mounted on the lifting device 3222 via an XY-axis pitch device 3221. In the technical solution of this application, the XY-axis pitch device 3221 can adopt a dual-axis platform structure.

[0025] In order to facilitate adjusting the distance between the light field camera and the calibration member 31 and thus adjust the focal length of the light field camera, according to a preferred embodiment, the light field camera is movably mounted on the bracket in the vertical direction.

[0026] In the technical solution of this application, the light field camera can be mounted on the bracket in an appropriate form such as a vertical slide or a lead screw mechanism, thereby adjusting the distance between the light field camera and the calibration component 31.

[0027] In order to keep the calibration component and the light field camera stable, according to a preferred embodiment, the bracket includes a base 11 and a support portion, the support portion including a column 121 mounted on the base 11 and extending vertically upward, and a support platform 122 located above the column and extending horizontally, the light field camera being mounted on the support platform 122.

[0028] Preferably, the light field camera can be mounted on the support platform 122 via a sliding mechanism 22.

[0029] In the technical solution of this application, the support platform 122 may have a through hole, through which the light field camera 21 can capture images of the complete calibration component 31. Multiple sliding mechanisms 22 may be arranged around the through hole, and the other end of the sliding mechanism 22 is connected to the light field camera 21, so that the light field camera 21 can adjust its height through the sliding mechanism 22.

[0030] To improve the shooting effect of the calibration component 31, in a preferred embodiment, a light source 321 is provided below the calibration component 31 to emit light toward the light field camera, wherein the emitting area of ​​the light source 321 is larger than the calibration component 31.

[0031] To more clearly identify the distortion of the calibration element 31, the calibration element 31 can take an appropriate form. According to a preferred embodiment of this application, the surface of the calibration element 31 can have a checkerboard or circular grid structure.

[0032] It should be clarified that the terminology used herein is for describing specific embodiments and is not intended to limit the scope of the invention. Unless otherwise specified in the context, the singular forms used herein, such as “a,” “an,” and “the,” may also have plural meanings. Furthermore, terms such as “comprising,” “including,” “containing,” and “having” are inclusive, meaning that the presence of the features, steps, operations, components, and / or parts they refer to does not exclude the possibility of other features, steps, operations, components, parts, and combinations thereof. The methods, processes, and operations described herein do not imply that they must be performed in a specific order unless there is an explicit order requirement. It should also be understood that other or alternative steps may exist.

[0033] Although terms such as “first,” “second,” and “third” may be used herein to distinguish different elements, components, regions, layers, and / or parts, these terms do not limit their meaning. These terms are used only to distinguish different elements, components, regions, layers, or parts. Unless explicitly indicated by the context, numerical terms such as “first,” “second,” etc., do not imply a particular order or hierarchy. Therefore, a “first” element, component, region, layer, or part mentioned herein may be referred to as a “second” element, component, region, layer, or part without departing from the teachings of the embodiments.

[0034] The foregoing description merely illustrates specific embodiments of the present invention, intended to enable those skilled in the art to understand and implement it. Various variations of these embodiments will be apparent to those skilled in the art, and the basic principles defined herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited to the embodiments shown herein, but should be extended to the broadest scope consistent with the principles and innovative features of this application.

Claims

1. A physical support platform for calibrating a light field camera, characterized in that, It includes a bracket for supporting the light field camera and a calibration assembly (3). The calibration assembly (3) includes a lifting device (3222) disposed directly below the light field camera and a calibration member (31) disposed on the lifting device (3222) with an adjustable angle to adjust the angle of the calibration member (31) and the distance between the light field camera and the calibration member (31). The calibration component (31) is mounted on the lifting device (3222) via the XY axis pitch device (3221).

2. The physical support platform according to claim 1, characterized in that, The light field camera is movably mounted on the bracket in the vertical direction.

3. The physical support platform according to claim 2, characterized in that, The bracket includes a base (11) and a support portion. The support portion includes a column (121) mounted on the base (11) and extending vertically upward, and a support platform (122) located above the column and extending horizontally. The light field camera is mounted on the support platform (122).

4. The physical support platform according to claim 3, characterized in that, The light field camera is mounted on the support platform (122) via a sliding mechanism (22).

5. The physical support platform according to claim 1, characterized in that, Below the calibration element (31) is a light source (321) that emits light toward the light field camera, wherein the light-emitting area of ​​the light source (321) is larger than that of the calibration element (31).

6. The physical support platform according to claim 1, characterized in that, The surface of the calibration element (31) has a checkerboard or circular grid structure.

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