A dual-infrared polarization image acquisition device and method

Abstract

Embodiments of the present application disclose a dual-infrared polarization image acquisition device and method. The technical solution provided by the embodiments of the present application is to arrange a first infrared polarizer between a first lens and an infrared detector, and a second infrared polarizer between a second lens and the infrared detector, so as to select and pass waves with a certain polarization direction from infrared waves, leaving infrared waves with a specific vibration direction, thereby presenting more image detail information of the target on the infrared image. Moreover, by setting the two infrared polarizers at corresponding polarization angles, the detail information of the acquired infrared image is further enhanced, ensuring the clarity of the infrared image.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of infrared image processing, and particularly to a dual-infrared polarization image acquisition device and method. Background Art

[0002] Fire is one of the common disasters threatening people's lives and property. For fire rescue, how to quickly and effectively find rescue targets at the fire scene is a very important issue. Due to the complex environment at the fire scene, it is relatively inefficient for firefighters to search for rescue targets only with the naked eye. Therefore, an infrared thermal imager is usually used as an auxiliary device to assist in searching for rescue targets. The infrared thermal imager performs infrared imaging, and the infrared images it collects can see the situation behind obstacles such as smoke at the fire scene. Using it to search for trapped rescue personnel at the fire scene can improve the fire rescue efficiency and ensure the safety of the lives of rescue targets.

[0003] However, when using an infrared thermal imager to collect infrared images at the fire scene, the collected infrared images are easily blocked by interference factors at the fire scene, resulting in unclear imaging at the fire scene and missing imaging information of rescue targets. Summary of the Invention

[0004] The embodiments of the present application provide a dual-infrared polarization image acquisition device and method, which can enhance the detailed information of the collected infrared images and ensure the clarity of the infrared polarization images.

[0005] In a first aspect, the embodiments of the present application provide a dual-infrared polarization image acquisition device, including: a first infrared polarizer, a second infrared polarizer, a first lens, a second lens, an infrared detector, and an image processing device;

[0006] Both the first infrared polarizer and the second infrared polarizer are set at corresponding polarization angles. The first infrared polarizer is arranged between the first lens and the infrared detector, and the second infrared polarizer is arranged between the second lens and the infrared detector;

[0007] The infrared detector is connected to the image processing device. The infrared detector is used to collect the infrared waves processed by the first infrared polarizer and the second infrared polarizer to generate infrared images, and the image processing device is used to receive the infrared images for image processing.

[0008] Further, the first infrared polarizer and the second infrared polarizer are arranged perpendicular to each other.

[0009] Further, it further includes an angle adjustment device, which is rotatably connected to the first infrared polarizer and the second infrared polarizer, and is used to drive the first infrared polarizer and the second infrared polarizer to rotate to change the polarization angle.

[0010] Further, it further includes an infrared total reflection mirror, which is arranged between the first infrared polarizer and the first lens, and / or between the second infrared polarizer and the second lens.

[0011] Further, it further includes an opaque housing. The first infrared polarizer, the second infrared polarizer, the first lens, the second lens and the infrared detector are all encapsulated inside the opaque housing, and infrared light from the outside is refracted through the first lens and the second lens into the inside of the opaque housing.

[0012] Further, it further includes an infrared laser, which is arranged inside the opaque housing and is used to emit infrared light outward.

[0013] Further, it further includes a third lens, and the infrared laser emits infrared light outward through the third lens.

[0014] Further, it further includes a beam expander, which is arranged between the infrared laser and the third lens.

[0015] In a second aspect, an embodiment of the present application provides a method for collecting dual-infrared polarization images, which is applied to the dual-infrared polarization image collection device as described in the first aspect of the present application, and includes:

[0016] Adjust the polarization angle of the first infrared polarizer in sequence according to a preset angle interval, and perform infrared image collection separately to obtain a first set of infrared images, and / or adjust the polarization angle of the second infrared polarizer in sequence based on the preset angle interval, and perform infrared image collection separately to obtain a second set of infrared images;

[0017] Perform occluder recognition and image screening based on the first set of infrared images and / or the second set of infrared images to obtain a corresponding first image screening set and / or a second image screening set;

[0018] Determine a first polarization angle set corresponding to the first infrared polarizer and / or a second polarization angle set corresponding to the second infrared polarizer according to the first image screening set and / or the second image screening set;

[0019] Based on the first polarization angle set and / or the second polarization angle set, adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other to collect infrared images for searching for rescue targets.

[0020] Further, performing occluder recognition and image screening based on the first infrared image set and / or the second infrared image set includes:

[0021] Extracting the infrared images of the first infrared image set and / or the second infrared image set one by one, performing occluder detection and recognition through a preset occluder recognition model, and determining the corresponding noisy infrared images;

[0022] Screening out the noisy infrared images from the first infrared image set and / or the second infrared image set.

[0023] Further, screening out the noisy infrared images from the first infrared image set and / or the second infrared image set further includes:

[0024] Performing edge detection on the infrared images in the first infrared image set and / or the second infrared image set, and extracting the edge image information one by one;

[0025] Comparing the edge image information with preset edge deformation image feature information to determine the corresponding edge deformation infrared images;

[0026] Screening out the edge deformation infrared images from the first infrared image set and / or the second infrared image set.

[0027] Further, adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to collect infrared images for rescue target search includes:

[0028] Selecting the first polarization angle of the first infrared polarizer from the first polarization angle set;

[0029] Adjusting the second polarization angle of the second infrared polarizer based on the first polarization angle so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

[0030] Further, adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to collect infrared images for rescue target search includes:

[0031] Selecting the second polarization angle of the second infrared polarizer from the second polarization angle set;

[0032] Adjusting the first polarization angle of the first infrared polarizer based on the second polarization angle so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

[0033] Further, adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to collect infrared images for searching for rescue targets includes:

[0034] Select the first polarization angle of the first infrared polarizer and the second polarization angle of the second infrared polarizer from the first polarization angle set and the second polarization angle set respectively, and the first polarization angle and the second polarization angle are perpendicular to each other.

[0035] In the embodiment of the present application, the first infrared polarizer is arranged between the first lens and the infrared detector, and the second infrared polarizer is arranged between the second lens and the infrared detector, so as to select the waves passing through a certain polarization direction from the infrared waves and leave the infrared waves with a specific vibration direction, so as to present more image detail information of the target on the infrared image. Moreover, by setting the two infrared polarizers at corresponding polarization angles, the detail information of the collected infrared image is further enhanced, and the clarity of the infrared image is ensured. Description of the Drawings

[0036] Figure 1 is a schematic structural diagram of a dual-infrared polarization image acquisition device provided in Embodiment 1 of the present application;

[0037] Figure 2 is a flowchart of a dual-infrared polarization image acquisition method provided in Embodiment 1 of the present application;

[0038] Figure 3 is a flowchart for screening out noisy infrared images in Embodiment 1 of the present application;

[0039] Figure 4 is a flowchart for screening out deformed infrared images in Embodiment 1 of the present application;

[0040] Figure 5 is a flowchart for selecting polarization angles in Embodiment 1 of the present application;

[0041] Figure 6 is another flowchart for selecting polarization angles in Embodiment 1 of the present application;

[0042] Figure 7 is a schematic structural diagram of a dual-infrared polarization image acquisition device provided in Embodiment 2 of the present application;

[0043] Figure 8 is a schematic structural diagram of an electronic device provided in Embodiment 3 of the present application. Detailed Embodiments

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following provides a more detailed description of specific embodiments of this application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application. Additionally, it should be noted that for ease of description, only parts related to this application rather than all content are shown in the drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but it can also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0045] The dual-infrared polarization image acquisition device provided by an embodiment of this application aims to present more image detail information in the detected infrared image and mitigate the influence of interference factors by setting two infrared polarizers. Further, by providing a dual-infrared polarization image acquisition method, the optimal polarization angle of the infrared polarizer is set to make the detected infrared image clearer and the detail information of the target more prominent. Compared with traditional infrared thermal imagers, when obtaining infrared images at a fire scene, the infrared images collected are affected by on-site environmental factors (such as smoke, flames, etc.) and have a lot of noise information, seriously affecting the judgment of firefighters and thus the search of rescue personnel. Based on this, a dual-infrared polarization image acquisition device according to an embodiment of this application is provided to solve the technical problem of more infrared imaging noise information in existing fire rescue scenarios for infrared thermal imagers.

[0046] Embodiment 1:

[0047] Figure 1 Figure 1 shows a schematic structural diagram of a dual-infrared polarization image acquisition device provided by Embodiment 1 of this application. Refer to Figure 1 This dual-infrared polarization image acquisition device includes a first infrared polarizer, a second infrared polarizer, a first lens, a second lens, an infrared detector, and an image processing device; both the first infrared polarizer and the second infrared polarizer are set at corresponding polarization angles. The first infrared polarizer is disposed between the first lens and the infrared detector, and the second infrared polarizer is disposed between the second lens and the infrared detector; the infrared detector is connected to the image processing device. The infrared detector is used to collect infrared waves passing through a certain polarization direction selected by the first infrared polarizer and the second infrared polarizer to generate an infrared image, and the image processing device is used to receive the infrared image for image processing.

[0048] The infrared polarizer is an infrared metal wire grid polarizer. In the infrared band, the infrared waves radiated and reflected by different objects all have polarization characteristics, and the polarization information is another kind of information characterizing things different from the radiation energy. For a target object with uniform temperature, due to its different surface characteristics, the infrared waves reflected or self-radiated by it will exhibit different polarization characteristics. Moreover, when the temperature of the target is close to that of the environment, the polarization characteristics of the infrared waves reflected or self-radiated by the target are also different from those of the infrared waves in the environment. Therefore, in the embodiments of the present application, the infrared polarizer is used to selectively pass waves with a certain polarization direction, and only allow infrared waves with a specific vibration direction to pass through, so that the target can be distinguished from the environment, and even the details of the target can be presented, so as to ensure the clarity of the infrared polarization image. In addition, by setting two infrared polarizers at corresponding polarization angles, the infrared detector can collect infrared images from different optical paths through the two infrared polarizers, and the infrared image synthesized from the infrared images can further enhance the image detail information, making the target imaging clearer and more obvious.

[0049] Specifically, the dual-infrared-polarization image acquisition device has an opaque housing. The first infrared polarizer, the second infrared polarizer, the first lens, the second lens and the infrared detector are all encapsulated inside the opaque housing, and the infrared light from the outside enters the inside of the opaque housing through the refraction of the first lens and the second lens. The dual-infrared-polarization image acquisition device further includes an infrared laser, a third lens and a beam expander. The beam expander is arranged between the infrared laser and the third lens, and the infrared laser is arranged inside the opaque housing for emitting infrared light outward. Moreover, when emitting infrared light, the infrared laser emits infrared light outward through the third lens.

[0050] Exemplarily, such as Figure 1As shown in the figure, when the dual-infrared polarization image acquisition device of the embodiment of the present application acquires the infrared image of the rescue target, the infrared laser emits infrared light, and the infrared light is emitted from the light-tight housing through the optical path formed by the beam expander and the third lens and irradiates on the rescue target. Further, the infrared detector detects the infrared radiation of the rescue target and the environment and the infrared reflection reflected by the corresponding infrared laser. When detecting the above infrared waves, on the one hand, the infrared waves enter the light-tight housing from the first lens, and after passing through the first infrared polarizer to select waves with a certain polarization direction, they are collected by the infrared detector. On the other hand, they enter the light-tight housing from the second lens, and after passing through the second infrared polarizer to select waves with a certain polarization direction, they are collected by the infrared detector. The infrared detector collects infrared waves using different optical paths, synthesizes the infrared images obtained based on the two optical paths, and obtains an infrared image with more obvious information of the rescue target image information. The two infrared polarizers are respectively set to allow only specific infrared waves to pass through, and select waves with a certain polarization direction for other infrared waves. In this way, the infrared image information of the rescue target can be effectively distinguished from the environment, and even more details of the infrared image information of the target can be presented. Then the infrared detector converts the infrared waves of the rescue target and the environment into infrared images and uploads them to the image processing device, thus completing the infrared image acquisition of the dual-infrared polarization image acquisition device. Based on the acquired infrared images, the infrared image processing device can further process and present them to the firefighters, so as to facilitate the firefighters to accurately and quickly search for the rescue target during the fire rescue. Moreover, when performing infrared image processing, the infrared image processing device can further identify the infrared image features of the rescue target and mark the rescue target, so as to facilitate the firefighters to visually determine the position of the rescue target on the infrared image screen.

[0051] In one embodiment, the first infrared polarizer and the second infrared polarizer are arranged perpendicular to each other. According to the imaging principle of the infrared polarization image, when the two infrared polarizers are arranged orthogonally, more polarization state information will be collected, that is, more optical information will be collected. Then, according to the acquisition requirements, the infrared polarizer is set to select and pass specific infrared waves corresponding to the rescue target, so that the image detail information of the rescue target obtained by infrared imaging is more and clearer.

[0052] Further, the dual-infrared polarization image acquisition device further includes an angle adjustment device, which is rotationally connected to the first infrared polarizer and the second infrared polarizer and is used to drive the first infrared polarizer and the second infrared polarizer to rotate to change the polarization angle. By setting the angle adjustment device, the polarization angles of the first infrared polarizer and the second infrared polarizer can be adjusted, so that the vibration directions of the two infrared polarizers are changed to adapt to the infrared imaging of the target in different scenarios, and the image details of the rescue target can maintain a certain clarity in different scenarios.

[0053] On the other hand, the dual-infrared polarization image acquisition device according to the embodiment of the present application further includes an infrared total reflection mirror, which is disposed between the first infrared polarizer and the first lens, and / or between the second infrared polarizer and the second lens. The infrared total reflection mirror is to ensure that the first infrared polarizer and the second infrared polarizer can receive the infrared waves refracted by the first lens and the second lens, ensure the stability of the infrared wave transmission, so that the infrared waves passing through the first infrared polarizer and the second infrared polarizer in a certain polarization direction can be projected to the infrared detector. In terms of distance, as Figure 1 shown, this infrared total reflection mirror is disposed between the first infrared polarizer and the first lens. When collecting infrared waves, the infrared waves are refracted by the first lens to the first infrared polarizer, and after being processed by the first infrared polarizer, the infrared waves are projected to the infrared detector, and the infrared detector generates an infrared image based on the detected infrared waves, thereby completing the acquisition of the infrared image.

[0054] As described above, by disposing the first infrared polarizer between the first lens and the infrared detector, and the second infrared polarizer between the second lens and the infrared detector, waves passing through a certain polarization direction are selected from the infrared waves, leaving infrared waves with a specific vibration direction, so as to present more image detail information of the target on the infrared image. Moreover, by setting the two infrared polarizers at corresponding polarization angles, the detail information of the collected infrared image is further enhanced, ensuring the clarity of the infrared image.

[0055] Further, Figure 2 The flowchart of a dual-infrared polarization image acquisition method provided by Embodiment 1 of the present application is given. The dual-infrared polarization image acquisition method provided in this embodiment can be executed by the above-mentioned dual-infrared polarization image acquisition device, and the dual-infrared polarization image acquisition device can be implemented in a software and / or hardware manner.

[0056] The following takes the dual-infrared polarization image acquisition device as the main body for executing the dual-infrared polarization image acquisition method as an example for description. Referring to Figure 2 , the dual-infrared polarization image acquisition method specifically includes:

[0057] S110. Adjust the polarization angle of the first infrared polarizer in sequence according to a preset angle interval, and perform infrared image acquisition separately to obtain a first infrared image set, and / or adjust the polarization angle of the second infrared polarizer in sequence based on the preset angle interval, and perform infrared image acquisition separately to obtain a second infrared image set.

[0058] Specifically, the dual-infrared polarization image acquisition method of the embodiments of the present application aims to use the above-mentioned dual-infrared polarization image acquisition device to acquire the highest-quality infrared images, so as to ensure that during the fire rescue process, more image detail information of the rescue target is captured in the acquired infrared images, and the images are clearer and more obvious. To acquire the best-quality infrared images, it is necessary to adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other and at a better polarization angle for infrared image acquisition. Therefore, it is necessary to determine the optimal polarization angles of the first infrared polarizer and the second infrared polarizer to ensure the clarity of the infrared images of the rescue target during the fire rescue process.

[0059] Further, when determining the optimal polarization angles of the first infrared polarizer and the second infrared polarizer for acquiring the infrared images of the rescue target, the embodiments of the present application sequentially adjust the polarization angle of the first infrared polarizer and / or the polarization angle of the second infrared polarizer according to a preset angle interval, and separately acquire infrared images. It can be understood that in order to determine the polarization angles of the two infrared polarizers respectively, it is necessary to independently adjust the polarization angles of the two infrared polarizers for infrared image acquisition. Taking the infrared image acquisition of the first infrared polarizer as an example, when acquiring an infrared image, the polarization angle of the first infrared polarizer is adjusted by an angle adjustment device. According to an angle interval of 1°, for every 1° adjustment of the polarization angle of the first infrared polarizer, the corresponding infrared image is acquired. The angle interval is set according to the actual infrared image acquisition requirements. The smaller the angle interval, the more accurate the final obtained optimal polarization angle. In this way, infrared images corresponding to different polarization angles are obtained, and a first infrared image set is obtained. It should be noted that when acquiring infrared images based on the adjustment of the polarization angle of the first infrared polarizer, the second infrared polarizer does not correspondingly acquire infrared images, so as to realize the separate infrared image acquisition of each infrared polarizer.

[0060] Furthermore, referring to the above-mentioned infrared image acquisition method based on the first infrared polarizer, a second infrared image set is obtained by acquiring infrared images based on the second infrared polarizer. It can be understood that the infrared images in the above-mentioned acquired first infrared image set and second infrared image set all correspond to the polarization angle of an infrared polarizer, so as to facilitate subsequent determination of the corresponding polarization angle according to image screening.

[0061] S120. Perform occluder recognition and image screening based on the first infrared image set and / or the second infrared image set to obtain the corresponding first image screening set and / or second image screening set.

[0062] Specifically, based on the above-mentioned first infrared image set and / or the second infrared image set, further alignment and screening are performed to determine the infrared image with the best image quality. Then, the polarization angle of the infrared polarizer corresponding to this infrared image is the optimal polarization angle for infrared image acquisition.

[0063] Among them, based on the corresponding infrared image set, first perform occluder detection and recognition to screen out the corresponding noisy infrared images. Among them, referring to Figure 3 , the process of screening out noisy infrared images includes:

[0064] S1201: Extract the infrared images of the first infrared image set and / or the second infrared image set one by one, perform occluder detection and recognition through a preset occluder recognition model, and determine the corresponding noisy infrared images;

[0065] S1202: Screen out the noisy infrared images from the first infrared image set and / or the second infrared image set.

[0066] Exemplarily, taking the screening of noisy infrared images in the first infrared image set as an example, when screening out noisy infrared images, an occluder recognition model needs to be constructed in advance. Since in a fire rescue scene, what generally blocks the search for rescue targets is smoke or fire, therefore, in the embodiment of the present application, when constructing the occluder recognition model, a large number of infrared image feature information of smoke and fire are collected in advance, and these infrared image feature information are used as training samples to construct an occluder recognition model based on a convolutional neural network, and the occluder recognition model based on smoke and fire is obtained. Further, use the occluder recognition model to perform occluder recognition on each infrared image in the first infrared image set. Screen out the infrared images with occluders among them, define them as noisy infrared images, and screen out this part of the noisy infrared images from the first infrared image set. In one embodiment, the proportion of the occluder occupying the area of the entire infrared image can be further calculated. By setting a proportion threshold, if the calculated proportion of the occluder occupying the area of the entire infrared image reaches the set proportion threshold, it is considered a noisy infrared image. Correspondingly, referring to the above method for screening out noisy images, screen out the noisy infrared images in the second infrared image set.

[0067] In one embodiment, for the case where the image feature information of the target edge in the corresponding infrared image in the first infrared image set and / or the second infrared image set is deformed, determine this infrared image as a deformed infrared image and screen it out. Among them, referring to Figure 4 , the process of screening out deformed infrared images includes:

[0068] S1203: Perform edge detection on the infrared images in the first infrared image set and / or the second infrared image set, and extract edge image information one by one;

[0069] S1204. Compare the edge image information with preset edge deformation image feature information to determine the corresponding edge-deformed infrared image;

[0070] S1205. Screen out the edge-deformed infrared image from the first infrared image set and / or the second infrared image set.

[0071] When screening out edge-deformed infrared images from the first infrared image set and / or the second infrared image set, first perform edge detection on each infrared image to determine the edge image feature information of the target in the infrared image. Since the infrared intensity information of the target is affected by environmental conditions and other interference measures and is not stable and reliable, while the polarization information determined by the nature of the object itself is more stable and reliable, combining intensity information and polarization information can obtain better detection and recognition performance. There are differences in the infrared polarization characteristics between the target and the background or between different targets, resulting in a transition of polarization information at the target edge. Utilizing this difference in infrared polarization characteristics to enhance the target edge contour information with a transitional nature and decompose the intensity information that is ineffective for target identification can effectively highlight the edge information and achieve edge detection.

[0072] After edge detection of the target, extract the edge image information obtained from the edge detection of the target, and compare this edge image information with the preset edge deformation image feature information of the corresponding target. The preset edge deformation image feature information of the corresponding target identifies the features when the edge of the target infrared image is deformed. Then, based on the comparison between the detected edge image information and the preset edge deformation image feature information of the corresponding target, if the similarity between the two reaches the set similarity threshold, it is considered that they are the same; otherwise, they are different. For the edge image information with the same matching comparison, the corresponding infrared image is the edge-deformed infrared image. Referring to the above comparison method, the edge-deformed infrared images in the first infrared image set and / or the second infrared image set can be determined and deleted from the corresponding infrared image set.

[0073] S130. Determine the first polarization angle set corresponding to the first infrared polarizer and / or the second polarization angle set corresponding to the second infrared polarizer according to the first image screening set and / or the second image screening set.

[0074] Further, after image screening based on the above step S120, the infrared images in the first image screening set and the second image screening set obtained are relatively high-quality infrared images. Since the infrared images in the first infrared image set and the second infrared image set each correspond to a polarization angle of an infrared polarizer, the infrared images in the first image screening set and the second image screening set also correspond to a polarization angle of an infrared polarizer. According to the polarization angle information pre-correspondingly bound to these infrared images, the first polarization angle set of the first infrared polarizer and the second polarization angle set of the corresponding second infrared polarizer can be determined. It can be understood that relatively high-quality infrared images can be obtained based on the above first polarization angle set and second polarization angle set.

[0075] S140. Based on the first polarization angle set and / or the second polarization angle set, adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other to collect infrared images for searching for rescue targets.

[0076] Further, based on the above first polarization angle set and second polarization angle set, since the dual-infrared polarization image acquisition device in the embodiment of the present application uses two infrared polarizers to acquire infrared images, and according to the imaging principle of infrared polarization images, when the two infrared polarizers are orthogonally arranged, more polarization state information will be collected, that is, more optical information will be collected, and the infrared image feature details of the target will be more prominent. Therefore, in the embodiment of the present application, when setting the polarization angles of the two infrared polarizers, the two are set at a 90° angle, and, while keeping the two perpendicular to each other, the polarization angles of the first infrared polarizer and the second infrared polarizer are selected according to the first polarization angle set and / or the second polarization angle set. Refer to Figure 5 , the polarization angle selection process includes:

[0077] S1401. Select the first polarization angle of the first infrared polarizer from the first polarization angle set;

[0078] S1402. Based on the first polarization angle, adjust the second polarization angle of the second infrared polarizer so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

[0079] In one embodiment, a first set of polarization angles is determined based on the above steps S110 - S130, and a polarization angle is randomly selected from the first set of polarization angles or selected from the best according to the quality of the corresponding infrared image as the first polarization angle of the first infrared polarizer. Further, in the case where the first polarization angle is determined, in order to ensure that the first infrared polarizer and the second infrared polarizer are perpendicular to each other, the second infrared polarizer is adjusted according to the first polarization angle to obtain the second polarization angle of the second infrared polarizer. And further, based on the determined first polarization angle and second polarization angle, the first infrared polarizer and the second infrared polarizer are set to collect infrared images for fire rescue, so that in the obtained infrared images, the image features of the rescue target are clear and the image details are significant.

[0080] Referring Figure 6 , another flowchart for polarization angle selection is provided, and the polarization angle selection process includes:

[0081] S1403. Select the second polarization angle of the second infrared polarizer from the second set of polarization angles;

[0082] S1404. Adjust the first polarization angle of the first infrared polarizer based on the second polarization angle so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

[0083] In one embodiment, a second set of polarization angles is determined based on the above steps S110 - S130, and a polarization angle is randomly selected from the second set of polarization angles or selected from the best according to the quality of the corresponding infrared image as the second polarization angle of the second infrared polarizer. Further, in the case where the second polarization angle is determined, in order to ensure that the first infrared polarizer and the second infrared polarizer are perpendicular to each other, the first infrared polarizer is adjusted according to the second polarization angle to obtain the first polarization angle of the first infrared polarizer. And further, based on the determined second polarization angle and first polarization angle, the first infrared polarizer and the second infrared polarizer are set to collect infrared images for fire rescue, so that in the obtained infrared images, the image features of the rescue target are clear and the image details are significant.

[0084] In addition, in one embodiment, the first polarization angle of the first infrared polarizer and the second polarization angle of the second infrared polarizer are respectively selected from the first set of polarization angles and the second set of polarization angles, and the first polarization angle and the second polarization angle are perpendicular to each other. It can be understood that the first set of polarization angles and the second set of polarization angles are determined based on the above steps S110 - S130. Further, the first polarization angle and the second polarization angle are respectively selected from the first set of polarization angles and the second set of polarization angles, and it is required that the selected first polarization angle and the second polarization angle are perpendicular to each other, so as to ensure the optimal quality of the infrared image of the rescue target finally collected.

[0085] As described above, the polarization angle of the first infrared polarizer is sequentially adjusted at a preset angular interval, and infrared image acquisition is performed separately to obtain a first set of infrared images, and / or the polarization angle of the second infrared polarizer is sequentially adjusted at a preset angular interval, and infrared image acquisition is performed separately to obtain a second set of infrared images. Based on the first set of infrared images and / or the second set of infrared images, occlusion object recognition and image screening are performed to obtain corresponding first image screening sets and / or second image screening sets. The first set of polarization angles corresponding to the first infrared polarizer and / or the second set of polarization angles corresponding to the second infrared polarizer are determined according to the first image screening sets and / or the second image screening sets. Based on the first set of polarization angles and / or the second set of polarization angles, the first infrared polarizer and the second infrared polarizer are adjusted to be perpendicular to each other to acquire infrared images for searching for rescue targets. By adopting the above technical means, the optimal polarization angles of the two infrared polarizers can be determined when the dual-infrared polarization image acquisition device performs infrared image acquisition. Thereby, infrared images with higher clarity can be further obtained, so that more detailed information of the target captured in the infrared image is available, and further, the searching efficiency of the rescue target in fire rescue is optimized.

[0086] Embodiment 2:

[0087] Based on the above embodiment, Figure 7 is a schematic structural diagram of a dual-infrared polarization image acquisition device provided in Embodiment 2 of this application. Refer to Figure 7 This dual-infrared polarization image acquisition device provided in this embodiment specifically includes: an acquisition module 21, a screening module 22, a determination module 23, and an adjustment module 24.

[0088] Among them, the acquisition module 21 is used to sequentially adjust the polarization angle of the first infrared polarizer at a preset angular interval, and perform infrared image acquisition separately to obtain a first set of infrared images, and / or sequentially adjust the polarization angle of the second infrared polarizer at a preset angular interval, and perform infrared image acquisition separately to obtain a second set of infrared images;

[0089] The screening module 22 is configured to perform occluder recognition and image screening based on the first infrared image set and / or the second infrared image set, so as to obtain a corresponding first image screening set and / or a second image screening set;

[0090] The determination module 23 is configured to determine a first polarization angle set corresponding to the first infrared polarizer and / or a second polarization angle set corresponding to the second infrared polarizer according to the first image screening set and / or the second image screening set;

[0091] The adjustment module 24 is configured to adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other to collect infrared images for searching for rescue targets based on the first polarization angle set and / or the second polarization angle set.

[0092] As described above, the polarization angle of the first infrared polarizer is adjusted sequentially at a preset angle interval, and infrared images are collected separately to obtain a first infrared image set, and / or the polarization angle of the second infrared polarizer is adjusted sequentially at a preset angle interval, and infrared images are collected separately to obtain a second infrared image set. Occluder recognition and image screening are performed based on the first infrared image set and / or the second infrared image set to obtain a corresponding first image screening set and / or a second image screening set. A first polarization angle set corresponding to the first infrared polarizer and / or a second polarization angle set corresponding to the second infrared polarizer are determined according to the first image screening set and / or the second image screening set. The first infrared polarizer and the second infrared polarizer are adjusted to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to collect infrared images for searching for rescue targets. By adopting the above technical means, the optimal polarization angles of the two infrared polarizers can be determined when the dual-infrared polarization image acquisition device acquires infrared images. Thereby, infrared images with higher clarity can be further obtained, so that more detailed information of the targets captured in the infrared images can be obtained, and further the search efficiency of rescue targets in fire rescue can be optimized.

[0093] The dual-infrared polarization image acquisition device provided in the second embodiment of the present application can be used to execute the dual-infrared polarization image acquisition method provided in the first embodiment, and has corresponding functions and beneficial effects.

[0094] Embodiment Three:

[0095] The third embodiment of the present application provides an electronic device. Referring to Figure 8 , the electronic device includes: a processor 31, a memory 32, a communication module 33, an input device 34, and an output device 35. The number of processors in the electronic device can be one or more, and the number of memories in the electronic device can be one or more. The processor, memory, communication module, input device, and output device of the electronic device can be connected through a bus or other means.

[0096] The memory 32, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the dual-infrared polarization image acquisition method described in any embodiment of the present application (for example, the acquisition module, screening module, determination module, and adjustment module in the dual-infrared polarization image acquisition device). The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the device, etc. In addition, the memory can include high-speed random access memory and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices. In some instances, the memory can further include a memory remotely set relative to the processor, and these remote memories can be connected to the device through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations.

[0097] The communication module 33 is used for data transmission.

[0098] The processor 31 executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory, that is, implements the above-mentioned dual-infrared polarization image acquisition method.

[0099] The input device 34 can be used to receive input digital or character information, and generate key signal inputs related to the user settings and function control of the device. The output device 35 can include display devices such as a display screen.

[0100] The above-provided electronic device can be used to execute the dual-infrared polarization image acquisition method provided in the first embodiment above, and has corresponding functions and beneficial effects.

[0101] Embodiment 4:

[0102] An embodiment of the present application further provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to execute a dual-infrared polarization image acquisition method when executed by a computer processor. The dual-infrared polarization image acquisition method includes: sequentially adjusting the polarization angle of a first infrared polarizer according to a preset angle interval, and separately performing infrared image acquisition to obtain a first set of infrared images, and / or sequentially adjusting the polarization angle of a second infrared polarizer based on the preset angle interval, and separately performing infrared image acquisition to obtain a second set of infrared images; performing occluder recognition and image screening based on the first set of infrared images and / or the second set of infrared images to obtain a corresponding first image screening set and / or a second image screening set; determining a first polarization angle set corresponding to the first infrared polarizer and / or a second polarization angle set corresponding to the second infrared polarizer according to the first image screening set and / or the second image screening set; adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to acquire infrared images for searching for rescue targets.

[0103] Storage medium - Any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media such as CD-ROMs, floppy disks or magnetic tape devices; computer system memories or random access memories such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memories such as flash memories, magnetic media (such as hard disks or optical storage); register or other similar types of memory elements, etc. The storage medium may also include other types of memories or combinations thereof. Additionally, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system that is connected to the first computer system via a network (such as the Internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations (such as in different computer systems connected via a network). The storage medium may store program instructions executable by one or more processors (such as specifically implemented as a computer program).

[0104] Of course, for a storage medium containing computer-executable instructions provided by an embodiment of the present application, the computer-executable instructions are not limited to the dual-infrared polarization image acquisition method as described above, and may also execute related operations in the dual-infrared polarization image acquisition method provided by any embodiment of the present application.

[0105] The dual-infrared polarization image acquisition device, storage medium, and electronic device provided in the above embodiments can execute the dual-infrared polarization image acquisition method provided in any embodiment of the present application. For technical details not described in detail in the above embodiments, reference can be made to the dual-infrared polarization image acquisition method provided in any embodiment of the present application.

[0106] The above is only the preferred embodiment of the present application and the technical principles applied. The present application is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions that can be made by those skilled in the art will not depart from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the concept of the present application, it may also include more other equivalent embodiments, and the scope of the present application is determined by the scope of the claims.

Claims

1. A dual-infrared polarization image acquisition method, applied to a dual-infrared polarization image acquisition device, the dual-infrared polarization image acquisition device including a first infrared polarizer, a second infrared polarizer, a first lens, a second lens, an infrared detector, and an image processing device; The first infrared polarizer and the second infrared polarizer are both set at corresponding polarization angles. The first infrared polarizer is disposed between the first lens and the infrared detector, and the second infrared polarizer is disposed between the second lens and the infrared detector; The infrared detector is connected to the image processing device. The infrared detector is used to collect the infrared waves processed by the first infrared polarizer and the second infrared polarizer to generate an infrared image, and the image processing device is used to receive the infrared image for image processing; Characterized in that, The method includes: Adjusting the polarization angle of the first infrared polarizer in sequence according to a preset angle interval, and separately performing infrared image acquisition to obtain a first infrared image set, and / or adjusting the polarization angle of the second infrared polarizer in sequence based on the preset angle interval, and separately performing infrared image acquisition to obtain a second infrared image set; Performing occluder recognition and image screening based on the first infrared image set and / or the second infrared image set to obtain a corresponding first image screening set and / or a second image screening set; Determining a first polarization angle set corresponding to the first infrared polarizer and / or a second polarization angle set corresponding to the second infrared polarizer according to the first image screening set and / or the second image screening set; Adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to acquire infrared images for searching for rescue targets.

2. The dual-infrared polarization image acquisition method according to claim 1, wherein Performing occluder recognition and image screening based on the first infrared image set and / or the second infrared image set includes: Extracting the infrared images of the first infrared image set and / or the second infrared image set one by one, performing occluder detection and recognition through a preset occluder recognition model, and determining corresponding noisy infrared images; Removing the noisy infrared images from the first infrared image set and / or the second infrared image set.

3. The dual-infrared polarization image acquisition method according to claim 2, characterized in that, Removing the noisy infrared images from the first infrared image set and / or the second infrared image set further includes: Performing edge detection on the infrared images in the first infrared image set and / or the second infrared image set, and extracting edge image information one by one; Comparing the edge image information with preset edge deformation image feature information to determine corresponding edge deformation infrared images; Removing the edge deformation infrared images from the first infrared image set and / or the second infrared image set.

4. The dual-infrared polarization image acquisition method according to claim 1, characterized in that Adjusting the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first polarization angle set and / or the second polarization angle set to acquire infrared images for searching for rescue targets includes: Selecting a first polarization angle of the first infrared polarizer from the first polarization angle set; Adjust the second polarization angle of the second infrared polarizer based on the first polarization angle so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

5. The dual-infrared polarization image acquisition method according to claim 1, characterized in that, Adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first set of polarization angles and / or the second set of polarization angles to collect infrared images for searching for rescue targets, including: Select the second polarization angle of the second infrared polarizer from the second set of polarization angles; Adjust the first polarization angle of the first infrared polarizer based on the second polarization angle so that the first infrared polarizer and the second infrared polarizer are perpendicular to each other.

6. The dual-infrared polarization image acquisition method according to claim 1, characterized in that Adjust the first infrared polarizer and the second infrared polarizer to be perpendicular to each other based on the first set of polarization angles and / or the second set of polarization angles to collect infrared images for searching for rescue targets, including: Select the first polarization angle of the first infrared polarizer and the second polarization angle of the second infrared polarizer from the first set of polarization angles and the second set of polarization angles respectively, and the first polarization angle and the second polarization angle are perpendicular to each other.

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