Parallel double-camera six-view-angle imaging system
Through the parallel dual-camera six-view imaging system, the fusion imaging technology of direct viewing angle and reflective viewing angle is used to solve the problem of detection blind spots when detecting three-dimensional packaged foods in the prior art, and efficient and accurate image information acquisition is achieved, reducing system costs.
Patent Information
- Application Number
- CN202510082826.5
- 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 it is impossible to obtain its complete surface feature information. The establishment of multiple visual cameras increases the complexity and cost of the system.
The parallel dual camera six-view imaging system is adopted, including an lighting module, a mirror module and a vision camera module. Through the imaging technology of direct viewing angle and mirror-based reflection viewing angle fusion imaging technology, two groups of visual cameras can obtain six-view images of the packaged food to be tested.
It effectively reduces the cost of the imaging system, simplifies the system configuration, improves the clarity of image recognition and judgment accuracy, and achieves the goal of obtaining relatively complete image information of three-dimensional packaged foods.
Smart Images
Figure CN119985320A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of packaged food detection, and in particular to a parallel 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. Summary of the invention
[0005] In order to solve the technical problems raised in the background technology, the present invention provides a parallel dual-camera six-view imaging system.
[0006] The present invention is implemented by the following technical solution: a parallel dual-camera six-view imaging system is proposed, which is arranged opposite to a slideway for conveying packaged food to be tested; the system comprises a lighting module, a reflector module, and a visual camera module.
[0007] 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 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.
[0008] The visual camera module 3 is used to directly image the packaged food to be tested, and to indirectly image the image of the packaged food to be tested reflected by the reflector; the visual camera module 3 includes two groups of visual cameras, which are arranged quasi-parallel, and there is an angle between their imaging fields; the two groups of visual cameras are facing the packaged food 5 to be tested, and their imaging fields intersect with the running trajectory of the packaged food 5 to be tested from top to bottom.
[0009] Preferably, the light source may be a strip light source, which may be formed by closely-spaced multiple white light LEDs, and the number of the light sources may be 5 groups.
[0010] Preferably, the angle between the first and second light sources is 15°, the angle between the second and third light sources is 30°, the angle between the third and fourth light sources is 30°, and the angle between the fourth and fifth light sources is 15°.
[0011] Preferably, the size of the reflector can be determined according to the specific packaged food to be tested.
[0012] Preferably, the angle between two reflection viewing angles in the same group can be determined according to the specific packaged food to be tested.
[0013] Preferably, the type, response band, and imaging angle of the visual camera can be determined according to the specific packaged food to be tested.
[0014] The parallel dual-camera six-view imaging system proposed by the present invention includes an illumination module, a reflector module, and a visual camera module. The illumination module includes multiple groups of light sources, which are parallelly distributed on an arc surface with the packaged food to be tested as the center of the circle, 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 a quasi-parallel 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 parallel 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.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The present invention uses a fusion imaging technology of direct viewing angle and reflective viewing angle based on a reflector to achieve observation of three viewing angles by one camera, thereby reducing the number of camera devices and lowering equipment costs.
[0017] The present invention can obtain complete image information around three-dimensional packaged food by utilizing two groups of visual cameras and a reflector group. The system configuration is simple, the image recognition is clear, and the judgment is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the parallel dual-camera six-view imaging system proposed by the present invention;
[0019] Figure 2 A schematic side view of a lighting module provided by the present invention;
[0020] Figure 3 This is a schematic top view of the lighting module proposed by the present invention;
[0021] Figure 4 A schematic diagram of three-view imaging of one of the visual cameras proposed in the present invention;
[0022] Figure 5 A schematic diagram of three-view imaging of another visual camera proposed by the present invention;
[0023] Figure 6 Schematic diagram of six-view imaging of packaged food to be tested in the present invention.
[0024] Description of main symbols:
[0025] Lighting module 1, reflector module 2, visual camera module 3, light source (11, 12, 13, 14), reflector (21, 22, 23, 24), visual camera (31, 32), slide 4, packaged food to be tested 5, direct viewing angle (51, 54), reflection viewing angle (52, 53, 55, 56) DETAILED DESCRIPTION
[0026] 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.
[0027] Embodiment 1:
[0028] Reference Figure 1-Figure 6The parallel 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 packaged food to be tested is usually a packaged food that is vacuum-sealed and generally in granular form, such as vacuum-sealed quail eggs, vacuum-sealed fruit pieces, and vacuum-sealed vegetable cubes. The packaged food to be tested slides downward along the slide 4. When passing through the image acquisition area of the parallel dual-camera six-view imaging system, the packaged food 5 to be tested is illuminated by the illumination module 1 and imaged by the visual camera module 3.
[0029] Reference Figure 1-Figure 3 The lighting module 1 proposed in the present invention includes a plurality of groups of light sources 11, which are parallelly distributed on an arc surface with the packaged food 5 to be tested as the center, so as to evenly illuminate the packaged food 5 to be tested without dead angles. The shape, color, quantity and lighting angle of the light source 11 can be determined according to the specific packaged food to be tested. For example, for vacuum-sealed quail eggs, preferably, the light source 11 can be a strip light source, which can be composed of a plurality of closely arranged white light LEDs. The number of light sources 11 can be 5 groups, the angle between the first group of light sources and the second group of light sources can be 15°, the angle between the second group of light sources and the third group of light sources can be 30°, the angle between the third group of light sources and the fourth group of light sources can be 30°, and the angle between the fourth group of light sources and the fifth group of light sources can be 15°.
[0030] Reference Figure 1 , Figure 4 as well as Figure 5 The reflector module 2 proposed in this solution includes four reflectors 21, 22, 23 and 24, wherein 21 and 22 form a group, and 23 and 24 form a group. The four reflectors are distributed around the packaged food to be tested. The reflectors 21 and 22 can reflect the surface image of the packaged food 5 to be tested that faces the reflector to the visual camera 31, and the reflectors 23 and 24 can reflect the surface image of the packaged food 5 to be tested that faces the reflector to the visual camera 32. The size of the reflector can be determined according to the specific packaged food to be tested. For example, for vacuum-sealed quail eggs, preferably, the size of the reflector can be 65mm*100mm.
[0031] The visual camera module 3 includes two groups of visual cameras 31 and 32, which are arranged in a quasi-parallel layout and are distributed in the front area of the packaged food 5 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. The visual camera 31 can obtain images of the packaged food 5 to be tested 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. The angles between the three perspectives 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 perspective 52 and the direct perspective 51 can be 60°, and the angle between the reflected perspective 53 and the direct perspective 51 can be 60°. 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°. The two groups of visual cameras 31 and 32 are arranged quasi-parallel, both facing the packaged food 5 to be tested, and intersecting 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 use a color linear array camera that can respond to the visible light band, and the imaging angle of the two groups of visual cameras can be 30°.
[0032] By adopting this direct perspective and reflective perspective fusion imaging technology based on a reflector, the parallel 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.
[0033] 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. Parallel dual-camera six-view imaging system, characterized in that: It is arranged opposite to a slideway (4) for conveying packaged food (5) to be tested; It comprises a lighting module (1), a reflector module (2), and a visual camera module (3); The lighting module (1) is used to evenly illuminate the packaged food (5) to be tested, and the lighting module (1) comprises a plurality of light sources (11) and a drive control circuit (12) thereof; The reflector module (2) is used to reflect the partial surface image of the packaged food (5) to be tested that faces the reflector to the visual camera module (3), and the reflector module (2) comprises four reflectors, two of which form a group, and the other two reflectors form another group; The visual camera module (3) is used to directly image the packaged food to be tested, and to indirectly image the image of the packaged food to be tested reflected by the reflector; the visual camera module (3) comprises two groups of visual cameras, the two groups of visual cameras are arranged quasi-parallel, and there is an angle between their imaging fields; the two groups of visual cameras are facing the packaged food to be tested (5), and their imaging fields intersect with the running trajectory of the packaged food to be tested (5) from top to bottom.
2. The parallel dual-camera six-view imaging system according to claim 1, characterized in that: The light source (11) can be a strip light source, which can be formed by a plurality of closely arranged white light LEDs, and the number of the light sources (11) can be 5 groups.
3. The parallel dual-camera six-view imaging system according to claim 1, characterized in that: The angle between the first and second light sources can be 15°, the angle between the second and third light sources can be 30°, the angle between the third and fourth light sources can be 30°, and the angle between the fourth and fifth light sources can be 15°.
4. The parallel 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 parallel dual-camera six-view imaging system according to claim 1, characterized in that: The angle between two reflection viewing angles in the same group can be determined according to the specific packaged food to be tested.
6. The parallel dual-camera six-view imaging system according to claim 1, characterized in that: The type, response band, and imaging angle of the visual camera can be determined according to the specific packaged food to be tested.