Device for analyzing surface color and texture of object in imaging mode

Abstract

The utility model discloses a device for analyzing the surface color and texture of an object in an imaging mode. Comprising a box body, a multispectral light source arranged on the box body, a first rotating table arranged at the bottom of the box body, a box door arranged on one side of the box body, a multi-camera-position fixing base arranged on one side of the box body, a side shooting camera arranged on the multi-camera-position fixing base and a high-angle shooting camera arranged on the top of the inner side of the box body. The interior of the box body forms a light-free cavity after the box door is closed, the multispectral light source is used for providing a light environment with a controllable spectrum in the light-free cavity and simulating a CIE standard light source spectrum, and a measured object is placed on the first rotating table to automatically rotate so as to shoot images in all directions and angles. According to the method, the overall color distribution condition of the object can be reflected, the object with complex textures and patterns can be analyzed, and each small area on the surface of the object can be captured to help to identify and analyze local chromatic aberration.

Description

Technical Field

[0001] The utility model relates to the technical field of full-automatic camera image quality testing, in particular to a device for analyzing the color and texture of an object surface in an imaging manner. Background Art

[0002] When analyzing the color of an object's surface image, the most commonly used instrument for surface color analysis is a reflective spectrophotometer. This type of instrument can measure the average chromaticity data of a small area on an object. However, existing instruments have the following disadvantages:

[0003] 1. The measurement range of chromaticity data is small and cannot reflect the overall color distribution of the object. If the color of the object surface is uneven, this method may cause data distortion.

[0004] 2. When color may vary significantly across a surface, measuring only the average value of a small area may overlook these subtle color differences, leading to inaccurate assessments of color consistency and uniformity.

[0005] 3. Limited by the selection of measurement area: The measurement area needs to be selected manually, which may introduce human error, especially when measuring multiple times. If the area measured each time is slightly different, it may lead to inconsistent results.

[0006] 4. Insufficient analysis of complex textures and patterns: For objects with complex textures and patterns, measuring only the average colorimetric data of a small area is insufficient to describe its overall visual effect. Such measurements may not fully capture the visual differences brought about by the pattern or texture.

[0007] 5. Time and efficiency issues: If comprehensive color measurement of a large area is required, measuring a small area can be very time-consuming and inefficient. Multiple repeated measurements and data integration are required, increasing the complexity and time cost of the operation. Summary of the Invention

[0008] In order to solve certain technical problems existing in the prior art, the purpose of this application is to provide a device for analyzing the color and texture of the surface of an object in an imaging manner, which can not only reflect the overall color distribution of the object and analyze objects with complex textures and patterns, but also capture every small area on the surface of the object to help identify and analyze local color differences.

[0009] In order to solve the above existing technical problems, the purpose of this application is achieved by adopting the following technical solutions:

[0010] A device for analyzing the color and texture of an object's surface by imaging, characterized in that it includes a box, a multi-spectral light source provided on the box, a first rotating platform provided at the bottom of the box, a box door provided on one side of the box, a multi-camera fixing seat provided on the side of the box, a side-viewing camera provided on the multi-camera fixing seat, and an overhead camera provided at the top inner side of the box; a lightless cavity is formed inside the box when the box door is closed; the multi-spectral light source is used to provide a controllable spectrum lighting environment within the lightless cavity to simulate the CIE standard light source spectrum; the object to be measured is placed on the first rotating platform and automatically rotated to capture images in various directions and angles.

[0011] Preferably, a long lifting hole is provided on the side wall of the box, the multi-camera fixing seat is provided on the outside of the box, the lens of the side camera is located in the lifting hole, a protective cover is provided outside the multi-camera fixing seat, and the lifting hole is located in the protective cover.

[0012] Preferably, the multi-camera fixing seat includes a lifting seat arranged on the side wall of the box body, a second rotating platform arranged on the lifting seat, and a rack arranged on the second rotating platform, and the side-shooting camera is fixed on the rack.

[0013] Preferably, the lifting seat includes a slide rail and a screw rod provided on the side wall of the box body, a slider provided on the slide rail and the screw rod, and a control motor for controlling the rotation of the screw rod, and the second rotating platform is provided on the slider.

[0014] Preferably, the box door is a sliding door.

[0015] Preferably, a guide rail is provided on both the upper and lower sides of the box body, both sides of the sliding door are arranged in the guide rail, and the sliding door moves along the guide rail.

[0016] Preferably, the inner wall of the matte cavity is N7 neutral diffuse reflective gray.

[0017] Preferably, a spectral illumination sensor is provided in the box.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] By automatically controlling the lighting environment, the side camera's position, and the angle of illumination of the object being measured, the calibrated imaging device can capture and analyze the color distribution of the entire object surface, enabling better color consistency and uniformity of the object's surface color and texture during acquisition, thereby more accurately evaluating color consistency and uniformity. At the same time, it can capture every tiny area on the object's surface, helping to identify and analyze local color differences and achieve local color difference detection. By rotating the object through the first rotating stage, the color information of the entire surface can be obtained at one time, without the need for multiple measurements and data integration, effectively improving measurement efficiency and data reliability. The calibrated imaging system has high repeatability, reducing errors caused by different measurement area selection and operation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a side view of the box body with the protective cover opened in the present invention, showing the structure of the multi-camera fixing base;

[0022] Figure 3 This is a schematic diagram showing the overall structure of the spectral illumination sensor in the present invention;

[0023] In the figure: 1. Guide rail; 2. First rotating table; 3. Box body; 4. Box door; 5. Multi-spectral light source; 6. Side-view camera; 7. Multi-camera fixing base; 8. Lifting hole; 9. Lightless cavity; 10. Spectral illumination sensor; 11. Rack; 12. Second rotating table; 13. Control motor; 14. Slider; 15. Lifting base; 16. Screw; 17. Slide rail; 18 Protective cover. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be understood that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0026] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0027] like Figure 1 As shown, a device for analyzing the color and texture of an object surface by imaging includes a box 3, a multi-spectral light source 5 provided on the box 3, a first rotating table 2 provided at the bottom of the box 3, a box door 4 provided on one side of the box 3, a multi-camera fixing seat 7 provided on one side of the box 3, a side-viewing camera 6 provided on the multi-camera fixing seat 7, and an overhead camera 10 provided on the top inner side of the box 3. When the box door 4 is closed, a lightless cavity 9 is formed inside the box 3. The multi-spectral light source 5 is used to provide a controllable spectrum of illumination environment in the lightless cavity 9 to simulate the CIE standard light source spectrum. The object to be measured is placed on the first rotating table 2 and automatically rotated to capture images in various directions and angles.

[0028] When it is necessary to perform imaging analysis and acquisition of the surface color and texture of an object, the box 3 is connected to a control terminal such as a computer, and image acquisition of the top and side of the object is achieved through the side camera 6 and the overhead camera 10. Among them, the first rotating table 2 adopts a high-precision electric rotation to rotate the object to be measured to capture images in various directions and angles, while the side camera 6 adopts a high-resolution camera and a hyperspectral camera. The side camera 6 can be used to capture images at different positions through the multi-camera fixing seat 7, and the multi-spectral light source 5 is used to provide a controllable spectrum lighting environment in the lightless cavity 9 to simulate the CIE standard light source spectrum. In the process of collecting the surface color and texture of the object, the object to be measured is placed on the first rotating table 2, and the box door 4 is closed to form a lightless environment inside the box 3. The multi-spectral light source 5 is controlled by the system. The desired lighting environment is created within the lightless cavity 9, and the object under test is then rotated 360° using the first rotating stage 2. Simultaneously, the system controls the side-mounted camera 6 to different camera positions, enabling comprehensive acquisition of the object's side surface color and texture. By automatically controlling the lighting environment, camera position, and adjustment of the illumination angle of the object under test, the calibrated imaging device can capture and analyze the color distribution across the entire surface of the object, ensuring greater color consistency and uniformity of the object's surface color and texture during acquisition, thereby more accurately assessing color consistency and uniformity. Compared to single-point measurement, this method can more comprehensively reflect surface color variations. Furthermore, it can capture every tiny area of the object's surface, helping to identify and analyze local color differences. This is particularly important for quality control and defect detection, especially in applications requiring high-precision color consistency, enabling local color difference detection. Furthermore, high-resolution cameras can also provide detailed spatial resolution, enabling the analysis of complex textures and patterns and the analysis of color differences between different areas. This allows for a more accurate description of the visual characteristics of the object's surface. By rotating the object using the first rotating stage 2, color information for the entire surface can be acquired simultaneously, eliminating the need for multiple measurements and data integration. This effectively improves measurement efficiency and data reliability. The calibrated imaging system offers high repeatability, reducing errors caused by varying measurement area selection and operating methods. This is crucial for applications requiring multiple measurements and long-term monitoring.

[0029] A further improvement is that a long lifting hole 8 is provided on the side wall of the box body 3, the multi-camera fixing seat 7 is provided on the outside of the box body 3, the lens of the side camera 6 is located in the lifting hole 8, a protective cover 18 is provided outside the multi-camera fixing seat 7, and the lifting hole 8 is located in the protective cover 18.

[0030] The volume of the box body 3 can be made smaller, and at the same time, the side camera 6 installed on the outside of the box body 3 can be extended into the inside of the box body 3 for image acquisition. The protective cover 18 protects the lifting hole 8 and the multi-camera fixing seat 7, which not only protects the multi-camera fixing seat 7 and the side camera 6, but also blocks the lifting hole 8 to prevent external light from entering the box body 3.

[0031] Further improvement is as follows: Figure 2 As shown, the multi-camera fixing seat 7 includes a lifting seat 15 arranged on the side wall of the box body 3, a second rotating platform 12 arranged on the lifting seat 15, and a frame 11 arranged on the second rotating platform 12, and the side camera 6 is fixed on the frame 11.

[0032] When the side camera 6 is installed on the multi-camera fixing seat 7, the height position of the side camera 6 can be adjusted along the lifting hole 8 through the lifting seat 15, and the angle of the side camera 6 can also be appropriately adjusted through the second rotating platform 12, so that the surface color and texture of the object can be collected more accurately, avoiding the situation where the side camera 6 cannot focus on the object.

[0033] A further improvement is that the lifting seat 15 includes a slide rail 17 and a screw rod 16 arranged on the side wall of the box body 3, a slider 14 arranged on the slide rail 17 and the screw rod 16, and a control motor 13 for controlling the rotation of the screw rod 16, and the second rotating platform 12 is arranged on the slider 14.

[0034] The control motor 13 and the second rotating platform 12 both adopt an electric high-precision structure. When the side camera 6 is raised and lowered by the lifting seat 15, the slider 14 can be moved up and down along the slide rail 17 by simply controlling the screw rod 16 through the control motor 13, thereby realizing the up and down control of the second rotating platform 12. The structure is simpler and more convenient, and the control accuracy is higher.

[0035] Further improvement is that described door 4 is sliding door. When box body 3 is opened, Cai Yonghong sliding door structure can make space requirement smaller.

[0036] A further improvement is that a guide rail 1 is provided on both the upper and lower sides of the box body 3 , both sides of the sliding door are provided in the guide rail 1 , and the sliding door moves along the guide rail 1 .

[0037] The sliding door is composed of several sheet-like plates stacked and connected at one time, and the guide rail 1 is distributed along the internal corner of the box 3. When the sliding door is pushed and pulled, the upper and lower ends move along the guide rail 1, so that the opening width of the box 3 can be arbitrarily controlled.

[0038] As a further improvement, the inner wall of the matte cavity 9 is in N7 neutral diffuse reflective gray, which can make the illumination of the test environment meet different test requirements.

[0039] Further improvement is as follows: Figure 3 As shown, a spectral illumination sensor 10 is provided in the box 3, which can better perform closed-loop correction on the light source.

[0040] The above-mentioned embodiments are only preferred embodiments of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and replacements made by technicians in this field based on the present application shall fall within the scope of protection required by the present application.

Claims

1. A device for analyzing the color and texture of an object surface by imaging, characterized by: The invention comprises a box (3), a multi-spectral light source (5) arranged on the box (3), a first rotating platform (2) arranged at the bottom of the box (3), a box door (4) arranged on one side of the box (3), a multi-camera fixing seat (7) arranged on one side of the box (3), a side-shooting camera (6) arranged on the multi-camera fixing seat (7), and a top-down camera (10) arranged on the top of the inner side of the box (3); a lightless cavity (9) is formed inside the box (3) after the box door (4) is closed; the multi-spectral light source (5) is used to provide a controllable spectrum lighting environment in the lightless cavity (9) to simulate the CIE standard light source spectrum; the object to be measured is placed on the first rotating platform (2) and automatically rotated to capture images in various directions and angles.

2. The device for analyzing the color and texture of an object surface by imaging according to claim 1, characterized in that: A long strip-shaped lifting hole (8) is provided on the side wall of the box body (3), the multi-camera fixing seat (7) is arranged outside the box body (3), the lens of the side-shooting camera (6) is located in the lifting hole (8), a protective cover (18) is provided outside the multi-camera fixing seat (7), and the lifting hole (8) is located in the protective cover (18).

3. The device for analyzing the color and texture of an object surface by imaging according to claim 2, characterized in that: The multi-camera fixing seat (7) comprises a lifting seat (15) arranged on the side wall of the box body (3), a second rotating platform (12) arranged on the lifting seat (15), and a frame (11) arranged on the second rotating platform (12), and the side-shooting camera (6) is fixed on the frame (11).

4. The device for analyzing the color and texture of an object surface by imaging according to claim 3, characterized in that: The lifting seat (15) includes a slide rail (17) and a screw rod (16) arranged on the side wall of the box body (3), a slider (14) arranged on the slide rail (17) and the screw rod (16), and a control motor (13) for controlling the rotation of the screw rod (16); the second rotating platform (12) is arranged on the slider (14).

5. The device for analyzing the color and texture of an object surface by imaging according to any one of claims 1 to 4, characterized in that: The box door (4) is a sliding door.

6. The device for analyzing the color and texture of an object surface by imaging according to claim 5, characterized in that: A guide rail (1) is provided on both the upper and lower sides of the box body (3), both sides of the sliding door are arranged in the guide rail (1), and the sliding door moves along the guide rail (1).

7. The device for analyzing the color and texture of an object surface by imaging according to claim 1, characterized in that: The inner wall of the matte cavity (9) is N7 neutral diffuse reflective gray.

8. The device for analyzing the color and texture of an object surface by imaging according to claim 1, characterized in that: A spectral illumination sensor is provided in the box (3).

Images