Intersection type double-camera six-view-angle imaging system
Through the direct-view and reflective-view fusion imaging technology of the intersecting dual-camera six-view imaging system, the problem of detecting blind spots in stereo packaged food detection is solved, and efficient and low-cost complete image information acquisition is achieved.
Patent Information
- Application Number
- CN202510083024.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-05-13
AI Technical Summary
The existing visual camera detection technology has large detection blind spots when detecting three-dimensional packaged foods, and cannot obtain complete surface feature information. The system is complex and costly.
An intersecting dual-camera six-view imaging system, including lighting module, mirror module and vision camera module, is adopted. Through the fusion imaging technology of direct viewing angle and mirror-based reflective viewing angle, each group of vision cameras obtains images from three perspectives, and a total of six perspectives are obtained.
It realizes the relatively complete image information of three-dimensional packaged food using only two sets of visual cameras, reducing system complexity and cost, and achieving functions that require six sets of visual cameras in the prior art.
Smart Images
Figure CN119985322A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of packaged food detection, and in particular to an intersecting dual-camera six-viewing angle imaging system. Background Art
[0002] In the field of packaged food inspection, after the food is vacuum-sealed, it is usually necessary to inspect whether it contains foreign matter, and whether there is leakage, damage, discoloration or defects. Conventional inspection technologies include X-ray inspection technology and visual camera inspection technology. X-ray inspection technology can detect foreign matter with large density differences such as metal, glass, ceramics, stone, bone, plastic, etc. in food, but foreign matter with similar density to food cannot be detected. At this time, visual camera inspection technology can be used to identify these foreign matter. At the same time, visual camera inspection technology can also detect whether the packaged food has leakage, damage, discoloration or defects.
[0003] For flat materials, generally, a single visual camera can be used to collect and acquire their surface feature information. However, for most packaged foods, which are usually three-dimensional materials, using only one visual camera will have a large detection blind spot and will not be able to acquire their complete surface feature information. In order to solve the problem of detection blind spots, it is necessary to set up multiple visual cameras, capture image information of different positions of the material from multiple angles, and then transmit it to the data processing system for integration, identification, and analysis. The more visual cameras are set up, the more complex the system is, the higher the installation accuracy requirements are, the more difficult the image data processing is, and the higher the cost is.
[0004] The purpose of the present invention is to solve the above-mentioned shortcomings existing in the existing visual camera detection technology and to provide a six-view imaging system that can obtain relatively complete image information of three-dimensional packaged food by only setting up two visual cameras.
[0005] The intersecting dual-camera six-view imaging system of the present invention includes an illumination module, a reflector module, and a visual camera module. The illumination module includes four groups of light sources, which are evenly distributed on the spherical crown surface with the packaged food to be tested as the sphere center, so as to evenly illuminate the packaged food to be tested without dead angles. The reflector module includes four reflectors, two reflectors in a group, divided into two groups, which are distributed around the packaged food to be tested, and the reflectors can reflect the surface image of the packaged food to be tested that faces the reflector to the corresponding visual camera. The visual camera module includes two groups of visual cameras, which adopt an intersecting layout and are distributed in the front area of the packaged food to be tested, so as to image the packaged food to be tested and the image of the packaged food to be tested reflected by the reflector. Each group of visual cameras can obtain images of the packaged food to be tested from three perspectives: including a direct perspective image directly observed by the camera toward the camera, and two reflected perspective images toward the reflector observed through two reflectors respectively. By adopting this direct perspective and reflective perspective fusion imaging technology based on a reflector, the intersecting dual-camera imaging system can obtain surface feature information of the packaged food to be tested from six perspectives, basically covering the complete surface image information of the packaged food to be tested, and realizing the function that requires six groups of visual cameras in the existing visual camera technology solution, effectively reducing the cost of the imaging system. Summary of the invention
[0006] In order to solve the technical problems raised in the background technology, the present invention provides an intersecting dual-camera six-view imaging system.
[0007] The present invention is implemented by the following technical solution: an intersecting dual-camera six-view imaging system is proposed, which is arranged opposite to a slideway for conveying packaged food to be tested.
[0008] The intersecting dual-camera six-view imaging system includes a lighting module, a reflector module, and a visual camera module.
[0009] The lighting module is used to evenly illuminate the packaged food to be tested. The lighting module includes multiple groups of light sources and their drive control circuits. The light sources are distributed on the same spherical crown surface, and the center of the spherical crown surface is located on the slideway, and the packaged food to be tested can pass through the center of the spherical crown.
[0010] The reflector module is used to reflect the partial surface image of the packaged food to be tested facing the reflector to the visual camera module. The reflector module includes four reflectors, two of which form a group and the other two reflectors form another group.
[0011] The visual camera module includes two groups of visual cameras, which are arranged in an intersecting manner and are distributed in the front area of the packaged food to be tested. The two groups of visual cameras are used to image the packaged food to be tested and the images of the packaged food to be tested reflected by a group of reflectors respectively; the imaging fields of the two groups of visual cameras intersect with the running track of the packaged food to be tested from top to bottom. Specifically, the center line of the angle of the direct viewing angle of the visual camera is perpendicular to the sliding direction of the packaged food to be tested.
[0012] Preferably, the shape, color and lighting angle of the light source can be determined according to the specific packaged food to be tested.
[0013] Preferably, the number of light sources may be four, and the four light sources are distributed on a spherical crown surface with an angle of 40° with the normal line of the center of the sphere, and the four groups of light sources are equidistantly distributed along the circumference of the spherical crown surface.
[0014] Preferably, the size of the reflector can be determined according to the specific packaged food to be tested.
[0015] Preferably, each visual camera can obtain images of the packaged food to be tested from three viewing angles, specifically including an image of a direct viewing angle directly observed by the visual camera and an image of a reflected viewing angle of two reflectors in the same group indirectly obtained by the visual camera.
[0016] Preferably, in the same group of reflectors, the included angle between the reflection viewing angles of two reflectors and the direct viewing angle of the corresponding viewing angle camera can be 60°.
[0017] Preferably, the imaging angle between the two sets of visual cameras is 90°.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] The visual camera module proposed in the present invention can realize observation of three viewing angles by one camera through the fusion imaging technology of direct viewing angle and reflective viewing angle based on a reflector.
[0020] The present invention can obtain complete image information around three-dimensional packaged food by using only two groups of visual cameras and a reflector group, and the system configuration is simple.
[0021] The present invention realizes the functions that can only be realized by six groups of visual cameras in the existing visual camera technical solution, and effectively reduces the cost of the imaging system. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the intersecting dual-camera six-view imaging system proposed by the present invention;
[0023] Figure 2 A schematic side view of a lighting module provided by the present invention;
[0024] Figure 3 This is a schematic top view of the lighting module proposed by the present invention;
[0025] Figure 4 It is a schematic diagram of three-view imaging of the visual camera 31 proposed in the present invention;
[0026] Figure 5 It is a schematic diagram of three-view imaging of the visual camera 32 proposed in the present invention;
[0027] Figure 6 This is a schematic diagram of six-view imaging of packaged food to be tested in the intersecting dual-camera six-view imaging system proposed by the present invention.
[0028] Description of main symbols:
[0029] Lighting module 1, reflector module 2, visual camera module 3, light sources (11, 12, 13, 14), reflectors (21, 22, 23, 24), visual cameras (31, 32), slide 4, packaged food to be tested 5, direct viewing angles (51, 54), and reflected viewing angles (52, 53, 55, 56). DETAILED DESCRIPTION
[0030] The present invention is further described below 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 a new embodiment.
[0031] Embodiment 1:
[0032] Reference Figure 1-Figure 6 The intersecting dual-camera six-view imaging system proposed in this scheme includes an illumination module 1, a reflector module 2, and a visual camera module 3. The imaging system proposed in this scheme is aimed at packaged foods to be tested, which are usually packaged foods after vacuum plastic packaging, generally in granular form, such as vacuum-sealed quail eggs, vacuum-sealed fruit pieces, vacuum-sealed vegetable cubes, etc.
[0033] Reference Figure 1 During specific operation, the packaged food to be tested slides downward along the slide 4, and when passing through the image acquisition area of the intersecting dual-camera six-view imaging system, the packaged food 5 to be tested is illuminated by the lighting module 1 and imaged by the visual camera module 3.
[0034] The lighting module 1 comprises four groups of light sources (11, 12, 13, 14), which are distributed on a spherical crown surface with the position of the packaged food 5 to be tested as the sphere center, and can evenly illuminate the packaged food to be tested without blind spots.
[0035] During specific operation, the shape, color and lighting angle of the light sources (11, 12, 13, 14) can be determined according to the specific packaged food to be tested. For example, for vacuum-sealed quail eggs, the light source can be a strip light source, which can be composed of a plurality of closely arranged white light LEDs. The light sources are distributed on a spherical crown surface with the packaged food 5 to be tested as the sphere center and an angle of 40° with the normal line of the food. The four groups of light sources 11, 12, 13, 14 are evenly distributed on the spherical crown surface at intervals of 90°.
[0036] In this embodiment, the reflector module 2 includes four reflectors (21, 22, 23, 24). Figure 1 , wherein 21 and 22 form a group, 23 and 24 form a group, and the four reflectors are distributed around the packaged food to be tested. The reflectors (21, 22) can reflect the surface image of the packaged food 5 to be tested that faces the reflectors to the visual camera 31, and the reflectors (23, 24) can reflect the surface image of the packaged food 5 to be tested that faces the reflectors to the visual camera 32. The size of the reflector can be determined according to the specific packaged food to be tested, such as for vacuum-sealed quail eggs, preferably, the size of the reflector can be 55mm*80mm.
[0037] As the best embodiment of the present invention, the visual camera module 3 includes two groups of visual cameras (31, 32), the two groups of visual cameras adopt an intersecting layout, and the two groups of visual cameras are distributed in the front area of the packaged food to be tested 5, so as to image the packaged food to be tested, and to image the packaged food image to be tested reflected by the reflector. The visual camera 31 can obtain images of the packaged food to be tested 5 from three perspectives: including an image of a direct perspective 51 directly observed by the camera toward the camera, an image of a reflected perspective 52 toward the reflector 21 observed through the reflector 21, and an image of a reflected perspective 53 toward the reflector 22 observed through the reflector 22. And the angle between the three perspectives can be determined according to the specific packaged food to be tested, such as for vacuum-sealed quail eggs, preferably, the angle between the reflected perspective 52 and the direct perspective 51 can be taken as 60°, and the angle between the reflected perspective 53 and the direct perspective 51 can be taken as 60°.
[0038] Similarly, the visual camera 32 can obtain images of the packaged food 5 to be tested at three viewing angles: including an image of a direct viewing angle 54 toward the camera directly observed by the camera, an image of a reflected viewing angle 55 toward the reflector 23 observed through the reflector 23, and an image of a reflected viewing angle 56 toward the reflector 24 observed through the reflector 24. The angles between the three viewing angles can be determined according to the specific packaged food to be tested. For example, for vacuum-sealed quail eggs, preferably, the angle between the reflected viewing angle 55 and the direct viewing angle 54 can be 60°, and the angle between the reflected viewing angle 56 and the direct viewing angle 54 can be 60°.
[0039] In this solution, two groups of visual cameras 31 and 32 are arranged to intersect, and the imaging fields of the two groups of visual cameras intersect with the running track of the packaged food to be tested from top to bottom. Specifically, the center line of the angle of the visual camera's direct viewing angle is perpendicular to the sliding direction of the packaged food to be tested. The visual camera 31 is facing the packaged food 5 to be tested, and forms a counterclockwise angle with the running track of the packaged food 5 to be tested. The visual camera 32 is facing the packaged food 5 to be tested, and forms a clockwise angle with the running track of the packaged food 5 to be tested. The type, response band, and imaging angle of the visual camera can be determined according to the specific packaged food to be tested. For example, for vacuum-sealed quail eggs, preferably, the visual camera can be a color linear array camera that can respond to the visible light band. The visual camera 31 forms a counterclockwise angle of 45° with the running track of the packaged food 5 to be tested, and the visual camera 32 forms a clockwise angle of 45° with the running track of the packaged food 5 to be tested. The imaging angle of the two groups of visual cameras is 90°.
[0040] By adopting this direct perspective and reflective perspective fusion imaging technology based on a reflector, the intersecting dual-camera imaging system can obtain surface feature information of six perspectives 51, 52, 53, 54, 55, and 56 of the packaged food 5 to be tested, basically covering the complete surface image information of the packaged food 5 to be tested, and realizing the function that requires six groups of visual cameras to achieve in the existing visual camera technical solution, effectively reducing the cost of the imaging system.
[0041] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. Intersecting dual-camera six-view imaging system, characterized in that: It is arranged opposite to the slideway for conveying the packaged food to be tested; It includes a lighting module, a reflector module, and a visual camera module; The lighting module is used to evenly illuminate the packaged food to be tested, and the lighting module includes multiple groups of light sources and their driving control circuits. The light sources are distributed on the same spherical crown surface, and the center of the spherical crown surface is located on the slideway, and the packaged food to be tested can pass through the center of the spherical crown surface; The reflector module is used to reflect the partial surface image of the packaged food to be tested facing the reflector to the visual camera module, and the reflector module includes four reflectors, two of which form a group, and the other two reflectors form another group; The visual camera module includes two groups of visual cameras, which are arranged in an intersecting manner and are distributed in the front area of the packaged food to be tested. The two groups of visual cameras are respectively used to image the packaged food to be tested and to image the image of the packaged food to be tested reflected by a group of reflectors; the imaging fields of the two groups of visual cameras intersect with the running trajectory of the packaged food to be tested from top to bottom.
2. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: The shape, color and lighting angle of the light source can be determined according to the specific packaged food to be tested.
3. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: The number of the light sources may be four, and the four light sources are distributed on a spherical crown surface with an angle of 40° with the normal line of the sphere center, and the four groups of light sources are equidistantly distributed along the circumference of the spherical crown surface.
4. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: The size of the reflector can be determined according to the specific packaged food to be tested.
5. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: Each visual camera can obtain images of the packaged food to be tested from three perspectives, including an image of a direct perspective directly observed by the visual camera and an image of a reflected perspective of two reflectors in the same group indirectly obtained by the visual camera.
6. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: In the same group of reflectors, the included angle between the reflection viewing angles of the two reflectors and the direct viewing angle of the corresponding viewing angle camera can be 60°.
7. The intersecting dual-camera six-view imaging system according to claim 1, characterized in that: The imaging angles of the two groups of visual cameras are 90°.