Monitoring system
By setting up multiple infrared camera module groups in the monitoring system and adjusting their control parameters, the problem of image quality degradation in overlapping monitoring areas was solved, achieving a high-quality all-around monitoring effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2026-01-14
- Publication Date
- 2026-07-31
AI Technical Summary
When using multiple infrared camera modules for large-scale surveillance, the infrared images in the overlapping areas of the surveillance range are easily interfered with, leading to image quality degradation.
By setting up multiple infrared camera module groups to monitor different ranges, and adjusting the control parameters of each module, such as wavelength, polarization direction and shooting timing, mutual interference can be reduced.
It effectively suppressed the degradation of infrared image quality in the overlapping areas of the monitoring range, and achieved high-quality all-round monitoring.
Smart Images
Figure CN122496724A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to surveillance systems. Background Technology
[0002] Japanese Patent No. 6743708 discloses a conventional imaging system that controls the infrared illumination timing of infrared camera modules in each vehicle. Specifically, by implementing inter-vehicle communication between the imaging control devices of each vehicle equipped with infrared camera modules that generate infrared images, interference caused by infrared light irradiated by the infrared camera module of one vehicle becoming an infrared image captured by the infrared camera module of another vehicle is avoided, thus preventing image quality degradation. Summary of the Invention
[0003] In cases of large-scale surveillance to prevent crime, multiple surveillance cameras are required. To prevent gaps in the surveillance coverage, the surveillance ranges of each camera need to partially overlap. When using infrared camera modules that emit infrared light for imaging, it is crucial to avoid image quality degradation in the overlapping areas caused by the infrared light emitted from one module affecting the infrared images captured by other modules.
[0004] This invention was made with the aim of addressing such a problem, and its purpose is to suppress the image quality degradation of infrared images in the overlapping parts of the monitoring range.
[0005] To address the aforementioned issues, a monitoring system based on one aspect of the present invention monitors a predetermined monitoring range using an infrared camera module group consisting of multiple infrared camera modules used for illuminating infrared light to capture infrared images.
[0006] The infrared camera module group includes:
[0007] The first infrared camera module monitors the first area within the monitoring range;
[0008] The second infrared camera module monitors a second range that overlaps with a portion of the right side of the first range when viewed from above.
[0009] The third infrared camera module monitors a third area that overlaps with a portion of the lower side of the first area when viewed from above; and
[0010] The fourth infrared camera module monitors the fourth range, which overlaps with the lower side of the second range and the right side of the third range when viewed from above.
[0011] In infrared imaging by one of the first, second, third, and fourth infrared camera modules, the control parameters of the first and fourth infrared camera modules during infrared imaging are set to be different from those of the second and third infrared camera modules in order to reduce the influence of infrared radiation from the other infrared camera modules.
[0012] According to this method of the present invention, it is possible to suppress the image quality degradation of infrared images in the overlapping areas of the monitoring range. Attached Figure Description
[0013] The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals denote the same elements, wherein:
[0014] Figure 1 This is a schematic diagram of a monitoring system based on one embodiment of the present invention. Detailed Implementation
[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the following description, the same reference numerals will be used to denote the same constituent elements.
[0016] Figure 1 This is a schematic diagram of a monitoring system based on one embodiment of the present invention.
[0017] The monitoring system of this embodiment is a system that monitors a specified monitoring range, such as within a smart city or inside a building, by means of an infrared camera module group 100 consisting of multiple infrared camera modules that are used to emit infrared light for infrared imaging.
[0018] like Figure 1 As shown, the infrared camera module group 100 includes: a first infrared camera module 10 for monitoring a first range within the monitoring range; a second infrared camera module 20 for monitoring a second range that overlaps with a portion to the right of the first range when viewed from above; a third infrared camera module 30 for monitoring a third range that overlaps with a portion to the lower side of the first range when viewed from above; a fourth infrared camera module 40 for monitoring a fourth range that overlaps with the lower side of the second range and the right side of the third range when viewed from above; and a control device 50 for controlling these infrared camera modules.
[0019] The first infrared camera module 10 to the fourth infrared camera module 40 each have an infrared light-emitting diode that emits infrared light. Responding to a shooting instruction signal from the control device 50, the first infrared camera module 10 to the fourth infrared camera module 40 illuminate infrared light of a predetermined wavelength towards their respective shooting ranges, and selectively receive infrared light of the predetermined wavelength reflected from the subject using optical filters or the like to perform infrared shooting. At this time, the first infrared camera module 10 to the fourth infrared camera module 40 can be configured to further restrict the polarization direction of the illuminated infrared light to a predetermined specific direction using polarization filters or the like, and selectively receive infrared light of that specific polarization direction reflected from the subject to perform infrared shooting. The first infrared camera module 10 to the fourth infrared camera module 40 transmit the infrared image generated by the infrared shooting to the control device 50.
[0020] The control device 50, for example, is a general-purpose computer, which sends shooting instruction signals to the first infrared camera module 10 to the fourth infrared camera module 40, and sets the control parameters of the first infrared camera module 10 to the fourth infrared camera module 40 as described later.
[0021] In cases of large-scale surveillance to prevent crime, multiple surveillance cameras are required, and to prevent gaps in the surveillance area, the surveillance ranges of each camera need to partially overlap. Furthermore, as in this embodiment, when using infrared camera modules as surveillance cameras, it is necessary to avoid image quality degradation of infrared images captured by other infrared camera modules due to the influence of infrared light emitted from one infrared camera module during the overlapping areas of the surveillance range.
[0022] Therefore, in this embodiment, during infrared imaging by one of the infrared camera modules 10 to 40, the control parameters of the first infrared camera module 10 to the fourth infrared camera module 40 are set in a way that reduces the influence of infrared light irradiated by the other infrared camera modules among these infrared camera modules. Examples of control parameters for the first infrared camera module 10 to the fourth infrared camera module 40 include, for example, the wavelength WL of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40, the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40, and the imaging timing ST of the first infrared camera module 10 to the fourth infrared camera module 40.
[0023] The following explains how the wavelength WL of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 is set as a control parameter of the first infrared camera module 10 to the fourth infrared camera module 40.
[0024] In this case, for example, the wavelength WL of the infrared light irradiated from the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first wavelength WL1 (e.g., 850 [nm]), and the wavelength WL of the infrared light irradiated from the second infrared camera module 20 and the third infrared camera module 30 is set as the second wavelength WL2 (e.g., 940 [nm]), which is different from the first wavelength WL1.
[0025] Therefore, the wavelength WL (second wavelength WL2) of the infrared light emitted from the second infrared camera module 20 and the third infrared camera module 30, which monitor a portion of the second and third ranges overlapping with the first range, can be made different from the wavelength WL (first wavelength WL1) of the infrared light emitted from the first infrared camera module 10. Furthermore, the wavelength WL (second wavelength WL2) of the infrared light emitted from the second infrared camera module 20 and the third infrared camera module 30, which monitor a portion of the second and third ranges overlapping with the fourth range, can be made different from the wavelength WL (first wavelength WL1) of the infrared light emitted from the fourth infrared camera module 40.
[0026] Therefore, it is possible to suppress the degradation of infrared images generated in the overlapping portions of the first and second ranges, and the overlapping portions of the first and third ranges. Furthermore, it is possible to suppress the degradation of infrared images generated in the overlapping portions of the fourth and second ranges, and the overlapping portions of the fourth and third ranges.
[0027] Furthermore, since two wavelengths (the first wavelength WL1 and the second wavelength WL2) can be used to monitor the four ranges from the first range to the fourth range, even when there are few options for the infrared wavelength WL, such as when there are only two options for the infrared light emitted from the infrared camera module, the degradation of the infrared image in the overlapping part of the first range to the fourth range can be suppressed.
[0028] Furthermore, if there are three options for the wavelength WL of the infrared light emitted from the infrared camera module, by setting the wavelength WL of the infrared light emitted from the first infrared camera module 10 to the first wavelength WL1, setting the wavelength WL of the infrared light emitted from the second infrared camera module 20 and the third infrared camera module 30 to the second wavelength WL2, and setting the wavelength WL of the infrared light emitted from the fourth infrared camera module 40 to the third wavelength WL3, which is different from the first wavelength WL1 and the second wavelength WL2, even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed.
[0029] Furthermore, if there are four options for the wavelength WL of the infrared light emitted from the infrared camera module, by making the wavelengths of the first infrared camera module 10 to the fourth infrared camera module 40 different, it is possible to suppress the degradation of the infrared image in all overlapping parts of the shooting ranges in the first to fourth ranges.
[0030] Next, the polarization direction PD of the infrared rays irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 will be set as control parameters of the first infrared camera module 10 to the fourth infrared camera module 40.
[0031] In this case, for example, the polarization direction PD of the infrared rays irradiated from the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first polarization direction PD1, and the polarization direction PD of the infrared rays irradiated from the second infrared camera module 20 and the third infrared camera module 30 is set as the second polarization direction PD2, which is different from the first polarization direction PD1.
[0032] Therefore, the polarization direction PD (second polarization direction PD2) of infrared rays emitted from the second infrared camera module 20 and the third infrared camera module 30, which monitor a portion of the second and third ranges overlapping with the first range, can be made different from the polarization direction PD (first polarization direction PD1) of infrared rays emitted from the first infrared camera module 10. Furthermore, the polarization direction PD (second polarization direction PD2) of infrared rays emitted from the second infrared camera module 20 and the third infrared camera module 30, which monitor a portion of the second and third ranges overlapping with the fourth range, can be made different from the polarization direction PD (first polarization direction PD1) of infrared rays emitted from the fourth infrared camera module 40.
[0033] Therefore, two polarization directions (first polarization direction PD1 and second polarization direction PD2) can be used to monitor the four ranges from the first range to the fourth range. Thus, even when there is only one option for the wavelength WL of the infrared light irradiated from the first infrared camera module 10 to the fourth infrared camera module 40, it is possible to suppress the degradation of infrared images generated in the overlapping portions of the first and second ranges, and the overlapping portions of the first and third ranges. Furthermore, it is possible to suppress the degradation of infrared images generated in the overlapping portions of the fourth and second ranges, and the overlapping portions of the fourth and third ranges.
[0034] Furthermore, if there are three options for the polarization direction PD of the infrared light irradiated from the infrared camera module, by setting the polarization direction PD of the infrared light irradiated from the first infrared camera module 10 to the first polarization direction PD1, setting the polarization direction PD of the infrared light irradiated from the second infrared camera module 20 and the third infrared camera module 30 to the second polarization direction PD2, and setting the polarization direction PD of the infrared light irradiated from the fourth infrared camera module 40 to the third polarization direction PD3, which is different from the first polarization direction PD1 and the second polarization direction PD2, even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed.
[0035] Furthermore, if there are four options for the polarization direction PD of the infrared light emitted from the infrared camera module, then by making the polarization directions of the first infrared camera module 10 to the fourth infrared camera module 40 different, it is possible to suppress the degradation of the infrared image in all overlapping parts of each shooting range from the first range to the fourth range.
[0036] Next, the shooting timing ST of the first infrared camera module 10 to the fourth infrared camera module 40 will be set as control parameters of the first infrared camera module 10 to the fourth infrared camera module 40.
[0037] In this case, if the time for infrared light irradiation and exposure by the infrared camera module is referred to as the "shooting time" for infrared imaging by the infrared camera module, then after the first infrared camera module 10 and the fourth infrared camera module 40 simultaneously send shooting instruction signals to begin their infrared imaging and the shooting time has elapsed, the second infrared camera module 20 and the third infrared camera module 30 simultaneously send shooting instruction signals to begin their infrared imaging. That is, the timing of the first shooting timing ST1, which is at least offset by the shooting time amount from the first shooting timing ST1 for sending shooting instruction signals to the first infrared camera module 10 and the fourth infrared camera module 40, is set as the second shooting timing ST2 for sending shooting instruction signals to the second infrared camera module 20 and the third infrared camera module 30.
[0038] Then, after the infrared shooting of the second infrared camera module 20 and the third infrared camera module 30 has started and the shooting time has elapsed, a shooting instruction signal is sent again to the first infrared camera module 10 and the fourth infrared camera module 40 to start their infrared shooting. That is, the timing that is at least offset from the second shooting timing ST2 by the shooting time is set as the next first shooting timing ST1.
[0039] This operation is repeated to stagger the shooting timing ST so that the shooting times of the first infrared camera module 10 and the fourth infrared camera module 40 do not overlap with the shooting times of the second infrared camera module 20 and the third infrared camera module 30. Therefore, the exposure of infrared images captured by the first infrared camera module 10 and the fourth infrared camera module 40 will no longer be affected by the infrared radiation emitted by the second infrared camera module 20 and the third infrared camera module 30.
[0040] Therefore, even when there is only one option for the wavelength WL and polarization direction PD of the infrared light irradiated from the first infrared camera module 10 to the fourth infrared camera module 40, it is possible to suppress the degradation of infrared images generated in the overlapping portions of the first and second ranges and the overlapping portions of the first and third ranges, and it is also possible to suppress the degradation of infrared images generated in the overlapping portions of the fourth and second ranges and the overlapping portions of the fourth and third ranges.
[0041] Furthermore, if the shooting times of the first infrared camera module 10, the second infrared camera module 20, the third infrared camera module 30, and the fourth infrared camera module 40 are not overlapping, for example, in the order of first infrared camera module 10 → second infrared camera module 20 and third infrared camera module 30 → fourth infrared camera module 40, then even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed.
[0042] Furthermore, by performing infrared imaging sequentially in the order of first infrared camera module 10 → second infrared camera module 20 → third infrared camera module 30 → fourth infrared camera module 40 in a manner that prevents the imaging time of all infrared camera modules from overlapping, it is possible to suppress the degradation of infrared images caused by all overlapping portions of the imaging ranges from the first range to the fourth range.
[0043] Furthermore, the shooting order of the first infrared camera module 10 to the fourth infrared camera module 40 mentioned above is just an example and is not limited to such a shooting order.
[0044] Next, the wavelength WL and polarization direction PD of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 will be set as control parameters of the first infrared camera module 10 to the fourth infrared camera module 40.
[0045] In this case, for example, the wavelength WL of the infrared light irradiated from the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first wavelength WL1, and the wavelength WL of the infrared light irradiated from the second infrared camera module 20 and the third infrared camera module 30 is set as the second wavelength WL2, which is different from the first wavelength WL1. Furthermore, the polarization direction PD of the infrared light irradiated from the first infrared camera module 10 and the third infrared camera module 30 is set as the first polarization direction PD1, and the polarization direction PD of the infrared light irradiated from the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second polarization direction PD2.
[0046] Therefore, it is possible to suppress the degradation of infrared images caused by the overlap between the first and second ranges, and the overlap between the first and third ranges, where the wavelengths WL of infrared radiation are different. Similarly, it is possible to suppress the degradation of infrared images caused by the overlap between the fourth and second ranges, and the overlap between the fourth and third ranges, where the wavelengths WL of infrared radiation are different.
[0047] Furthermore, since the polarization directions PD of the first infrared camera module 10 and the fourth infrared camera module 40, which have the same infrared wavelength WL, can be made to have different polarization directions (first polarization direction PD1 and second polarization direction PD2), even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed. Similarly, since the polarization directions PD of the second infrared camera module 20 and the third infrared camera module 30, which have the same infrared wavelength WL, can be made to have different polarization directions (first polarization direction PD1 and second polarization direction PD2), even if the second range and the third range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the second range and the third range can be suppressed.
[0048] As a result, if there are two options for the wavelength WL and polarization direction PD of the infrared light emitted from the infrared camera module, it is possible to suppress the degradation of the infrared image in all overlapping parts of the shooting ranges from the first range to the fourth range.
[0049] Next, the control parameters for the first infrared camera module 10 to the fourth infrared camera module 40 will be set to include the wavelength WL of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 and the shooting timing ST of the first infrared camera module 10 to the fourth infrared camera module 40.
[0050] In this case, for example, the wavelength WL of the infrared light emitted from the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first wavelength WL1, and the wavelength WL of the infrared light emitted from the second infrared camera module 20 and the third infrared camera module 30 is set as the second wavelength WL2, which is different from the first wavelength WL1. Furthermore, the shooting timing of the first infrared camera module 10 and the third infrared camera module 30 is set as the first shooting timing ST1, and the shooting timing of the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second shooting timing ST2, which is different from the first shooting timing.
[0051] Therefore, it is possible to suppress the degradation of infrared images caused by the overlap between the first and second ranges, and the overlap between the first and third ranges, where the wavelengths WL of infrared radiation are different. Similarly, it is possible to suppress the degradation of infrared images caused by the overlap between the fourth and second ranges, and the overlap between the fourth and third ranges, where the wavelengths WL of infrared radiation are different.
[0052] Furthermore, since the shooting timing ST of the first infrared camera module 10 and the fourth infrared camera module 40, which have the same infrared wavelength WL, can be set to different shooting timings (first shooting timing ST1 and second shooting timing ST2), even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed. Similarly, since the shooting timing ST of the second infrared camera module 20 and the third infrared camera module 30, which have the same infrared wavelength WL, can be set to different shooting timings (first shooting timing ST1 and second shooting timing ST2), even if the second range and the third range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the second range and the third range can be suppressed.
[0053] As a result, if there are two options for the wavelength WL of the infrared light emitted from the infrared camera module, it is possible to suppress the degradation of the infrared image caused by all overlapping portions of the shooting ranges from the first range to the fourth range.
[0054] Finally, the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 and the shooting timing ST of the first infrared camera module 10 to the fourth infrared camera module 40 will be explained as control parameters of the first infrared camera module 10 to the fourth infrared camera module 40.
[0055] In this case, for example, the polarization direction PD of the infrared light emitted from the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first polarization direction PD1, and the polarization direction PD of the infrared light emitted from the second infrared camera module 20 and the third infrared camera module 30 is set as the second polarization direction PD2, which is different from the first polarization direction PD1. Furthermore, the shooting timing ST of the first infrared camera module 10 and the third infrared camera module 30 is set as the first shooting timing ST1, and the shooting timing ST of the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second shooting timing ST2, which is different from the first shooting timing.
[0056] Therefore, it is possible to suppress the degradation of infrared images caused by the overlap between the first and second ranges with different polarization directions (PD) of infrared radiation, as well as the overlap between the first and third ranges. Similarly, it is possible to suppress the degradation of infrared images caused by the overlap between the fourth and second ranges with different polarization directions (PD) of infrared radiation, as well as the overlap between the fourth and third ranges.
[0057] Furthermore, since the shooting timing ST of the first infrared camera module 10 and the fourth infrared camera module 40, which have the same polarization direction PD of infrared light, can be set to different shooting timings (first shooting timing ST1 and second shooting timing ST2), even if the first range and the fourth range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the first range and the fourth range can be suppressed. Similarly, since the shooting timing ST of the second infrared camera module 20 and the third infrared camera module 30, which have the same polarization direction PD of infrared light, can be set to different shooting timings (first shooting timing ST1 and second shooting timing ST2), even if the second range and the third range partially overlap for some reason, the degradation of the infrared image in the overlapping part of the second range and the third range can be suppressed.
[0058] As a result, if there are two options for the polarization direction PD of the infrared light irradiated from the infrared camera module, it is possible to suppress the degradation of the infrared image caused by all overlapping parts of each shooting range from the first range to the fourth range.
[0059] The monitoring system described above, based on this embodiment, monitors a predetermined monitoring range using an infrared camera module group 100, which consists of multiple infrared camera modules used for infrared imaging. The infrared camera module group 100 includes: a first infrared camera module 10, which monitors a first range within the monitoring range; a second infrared camera module 20, which monitors a second range that overlaps with a portion to the right of the first range when viewed from above; a third infrared camera module 30, which monitors a third range that overlaps with a portion to the lower side of the first range when viewed from above; and a fourth infrared camera module 40, which monitors a fourth range that overlaps with the lower side of the second range and the right side of the third range when viewed from above. In infrared imaging by one of the infrared camera modules 10, 20, 30, and 40, the control parameters of the first and fourth infrared camera modules 10 and 40 are set to be different from those of the second and third infrared camera modules 20 and 30 in order to reduce the influence of infrared radiation from the other infrared camera modules.
[0060] Therefore, the control parameters of the second infrared camera module 20 and the third infrared camera module 30, which monitor the second and third ranges overlapping with the first range, can be set to suitable control parameters different from those of the first infrared camera module 10. This suppresses the degradation of infrared images generated in the overlapping portions of the first and second ranges, and the overlapping portions of the first and third ranges. Similarly, the control parameters of the second infrared camera module 20 and the third infrared camera module 30, which monitor the second and third ranges overlapping with the fourth range, can be set to suitable control parameters different from those of the fourth infrared camera module 40. This suppresses the degradation of infrared images generated in the overlapping portions of the fourth and second ranges, and the overlapping portions of the fourth and third ranges. As a result, a wide monitoring range can be monitored without omission using high-quality infrared images.
[0061] Specifically, the control parameters can be, for example, a combination of the wavelength WL of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 and the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40. In this case, the wavelength WL of the infrared light irradiated by the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first wavelength WL1, the wavelength WL of the infrared light irradiated by the second infrared camera module 20 and the third infrared camera module 30 is set as the second wavelength WL2, which is different from the first wavelength, the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 and the third infrared camera module 30 is set as the first polarization direction PD1, and the polarization direction PD of the infrared light irradiated by the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second polarization direction PD2, which is different from the first polarization direction PD1.
[0062] In this way, the control parameters of each infrared camera module from the first infrared camera module 10 to the fourth infrared camera module 40 can be set to different control parameters. Therefore, it is possible to suppress the degradation of infrared images in all overlapping portions of the shooting ranges from the first range to the fourth range.
[0063] Furthermore, the control parameters can be, for example, composed of a combination of the wavelength WL of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 and the shooting timing ST of the first infrared camera module 10 to the fourth infrared camera module 40. In this case, the wavelength WL of the infrared light irradiated by the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first wavelength WL1, the wavelength WL of the infrared light irradiated by the second infrared camera module 20 and the third infrared camera module 30 is set as the second wavelength WL2, which is different from the first wavelength WL1, the shooting timing ST of the first infrared camera module 10 and the third infrared camera module 30 is set as the first shooting timing ST1, and the shooting timing ST of the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second shooting timing ST2, which is different from the first shooting timing ST1.
[0064] In this way, if there are two options for the wavelength WL of the infrared light emitted from the infrared camera module, the control parameters of each infrared camera module from the first infrared camera module 10 to the fourth infrared camera module 40 can be set to different control parameters. Therefore, it is possible to suppress the degradation of the infrared image in all overlapping portions of the shooting ranges from the first range to the fourth range.
[0065] Furthermore, the control parameters can be, for example, composed of a combination of the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 to the fourth infrared camera module 40 and the shooting timing ST of the first infrared camera module 10 to the fourth infrared camera module 40. In this case, the polarization direction PD of the infrared light irradiated by the first infrared camera module 10 and the fourth infrared camera module 40 is set as the first polarization direction PD1, the polarization direction PD of the infrared light irradiated by the second infrared camera module 20 and the third infrared camera module 30 is set as the second polarization direction PD2, which is different from the first polarization direction PD1, the shooting timing ST of the first infrared camera module 10 and the third infrared camera module 30 is set as the first shooting timing ST1, and the shooting timing ST of the second infrared camera module 20 and the fourth infrared camera module 40 is set as the second shooting timing ST2, which is different from the first shooting timing ST1.
[0066] In this way, if there are two options for the polarization direction PD of the infrared light emitted from the infrared camera module, the control parameters of each infrared camera module from the first infrared camera module 10 to the fourth infrared camera module 40 can be set to different control parameters. Therefore, it is possible to suppress the degradation of the infrared image in all overlapping portions of the shooting ranges from the first range to the fourth range.
[0067] The embodiments of the present invention have been described above. However, the above embodiments only illustrate a part of the application examples of the present invention and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.
[0068] For example, in the above-described embodiments, a wider range can be monitored using multiple infrared camera module groups 100. In this case, for example, a portion of the second and fourth ranges of one infrared camera module group 100 can overlap with a portion of the first and third ranges of other infrared camera module groups 100 to ensure that no area is missed during monitoring.
Claims
1. A surveillance system that monitors a predetermined surveillance area using an infrared camera module group consisting of multiple infrared camera modules used to capture infrared images by illuminating infrared light. The infrared camera module group includes: The first infrared camera module monitors the first range within the monitoring range; The second infrared camera module monitors a second range that overlaps with a portion of the right side of the first range when viewed from above; The third infrared camera module monitors a third range that overlaps with a portion of the lower side of the first range when viewed from above. as well as The fourth infrared camera module monitors the fourth area, which overlaps with the lower side of the second area and the right side of the third area when viewed from above. In infrared imaging by one of the first, second, third, and fourth infrared camera modules, the control parameters of the first and fourth infrared camera modules during infrared imaging are set to be different from those of the second and third infrared camera modules in order to reduce the influence of infrared radiation from other infrared camera modules among these infrared camera modules.
2. The monitoring system according to claim 1, wherein, The wavelengths of the infrared rays emitted from the first and fourth infrared camera modules are set to be different from the wavelengths of the infrared rays emitted from the second and third infrared camera modules; or, the polarization direction of the infrared rays emitted from the first and fourth infrared camera modules is set to be different from the polarization direction of the infrared rays emitted from the second and third infrared camera modules; or, the shooting timing of the first and fourth infrared camera modules is set to be different from the shooting timing of the second and third infrared camera modules.
3. The monitoring system according to claim 1, wherein, The control parameters are composed of a combination of the wavelengths of the infrared light emitted from the first, second, third, and fourth infrared camera modules and the shooting timing of the first, second, third, and fourth infrared camera modules. The wavelength of the infrared light emitted from the first infrared camera module and the fourth infrared camera module is set as the first wavelength. The wavelength of the infrared light emitted from the second infrared camera module and the third infrared camera module is set to a second wavelength, which is different from the first wavelength. The shooting timing of the first infrared camera module and the third infrared camera module is set to the first shooting timing. The shooting timing of the second infrared camera module and the fourth infrared camera module is set to a second shooting timing that is different from the first shooting timing.
4. The monitoring system according to claim 1, wherein, The control parameters are composed of a combination of the wavelengths of the infrared light emitted from the first, second, third, and fourth infrared camera modules and the polarization directions of the infrared light emitted from the first, second, third, and fourth infrared camera modules. The wavelength of the infrared light emitted from the first infrared camera module and the fourth infrared camera module is set as the first wavelength. The wavelength of the infrared light emitted from the second infrared camera module and the third infrared camera module is set to a second wavelength, which is different from the first wavelength. The polarization direction of the infrared light emitted from the first infrared camera module and the third infrared camera module is set as the first polarization direction. The polarization direction of the infrared light emitted from the second infrared camera module and the fourth infrared camera module is set to a second polarization direction that is different from the first polarization direction.
5. The monitoring system according to claim 1, wherein, The control parameters are composed of the shooting timing of the first infrared camera module, the second infrared camera module, the third infrared camera module, and the fourth infrared camera module, and the combination of the polarization direction of the infrared light irradiated from the first infrared camera module, the second infrared camera module, the third infrared camera module, and the fourth infrared camera module. The shooting timing of the first infrared camera module and the fourth infrared camera module is set to the first shooting timing. The shooting timing of the second infrared camera module and the third infrared camera module is set to a second shooting timing, which is different from the first shooting timing. The polarization direction of the infrared light emitted from the first infrared camera module and the third infrared camera module is set as the first polarization direction. The polarization direction of the infrared light emitted from the second infrared camera module and the fourth infrared camera module is set to a second polarization direction that is different from the first polarization direction.