A short-wave infrared imaging system and imaging method thereof

Abstract

The short-wave infrared imaging system disclosed in the present invention relates to the field of infrared imaging technology, and includes a short-wave infrared imaging objective lens, a spatial light modulator, a one-dimensional compression optical device, a short-wave infrared array sensor, a visible light camera, a spectroscope and a computing device, wherein the short-wave infrared imaging objective lens is used to image a scene and generate a two-dimensional image of the scene, the spatial light modulator is used to encode the two-dimensional image of the scene using a displayed two-dimensional code, the one-dimensional compression optical device is used to optically compress the encoded two-dimensional image into a one-dimensional image, the short-wave infrared array sensor is used to measure the one-dimensional image, and the computing device is used to reconstruct the two-dimensional image according to a set number of two-dimensional codes and the measurement results of the corresponding one-dimensional image, thereby improving the imaging quality of the short-wave infrared image, reducing the cost, improving the luminous flux, resolution and frame rate, and enhancing the stability. In addition, the present invention also discloses a method for imaging using the short-wave infrared imaging system.

Description

Technical Field

[0001] The present invention relates to the field of infrared imaging technology, and in particular to a short-wave infrared imaging system and an imaging method thereof. Background Art

[0002] Short-wave infrared (wavelength between 0.9um and 2.5um) cameras have great application prospects in military reconnaissance, industrial inspection, scientific research and daily life. However, the extremely high price and strict export controls abroad have greatly limited its widespread application in China.

[0003] The sensors of short-wave infrared cameras are generally made of semiconductor materials such as InGaAs or PbSe. However, due to the high difficulty of production and low yield rate, they are very expensive, with an average price of RMB 0.7 per pixel. In contrast, the average price of a silicon-based visible light sensor is only RMB 0.7×10 -5 Based on the type of sensor they use, current shortwave infrared cameras can be divided into three types:

[0004] The first type is a short-wave infrared camera based on an array sensor. However, a high-resolution megapixel camera costs hundreds of thousands of RMB.

[0005] The second type is a short-wave infrared camera based on a linear array sensor, which uses a one-dimensional scanning galvanometer for scanning. Its price is only a few thousand yuan. However, due to the bottleneck of the scanning speed of the one-dimensional scanning galvanometer, the scanning speed is very limited, resulting in the inability to shoot real-time video, the light transmittance is very low, and because it contains mechanical moving parts, there will be stability problems;

[0006] The third type is a short-wave infrared camera based on a single pixel, which can be used with a two-dimensional scanning galvanometer for scanning, or with a spatial light modulator to collect information in two-dimensional space. It has the lowest price, but is extremely slow. Summary of the invention

[0007] To address the deficiencies of the prior art, an embodiment of the present invention provides a short-wave infrared imaging system and an imaging method thereof.

[0008] In a first aspect, a short-wave infrared imaging system provided by an embodiment of the present invention includes a short-wave infrared imaging objective lens, a spatial light modulator, a one-dimensional compression optical device, a short-wave infrared array sensor, a visible light camera, a spectroscope, and a computing device, wherein:

[0009] The short-wave infrared imaging objective lens is used to image a scene and generate a two-dimensional image of the scene;

[0010] The spatial light modulator is used to encode the two-dimensional image using a two-dimensional code, wherein the two-dimensional code can be changed by programming;

[0011] The one-dimensional compression optical device is used to optically compress the encoded two-dimensional image into a one-dimensional image;

[0012] The short-wave infrared array sensor is used to measure the one-dimensional image;

[0013] The computing device is used to reconstruct a two-dimensional image of the scene based on a set number of two-dimensional codes and measurement results of corresponding one-dimensional images;

[0014] The spectroscope is used to transmit short-wave infrared light and reflect visible light;

[0015] The visible light camera, as a viewfinder, is used to fuse the visible light image with the short-wave infrared light image to improve the imaging quality of the short-wave infrared imaging system.

[0016] Preferably, the short-wave infrared imaging objective lens, the spatial light modulator, the one-dimensional compression optical device and the short-wave infrared array sensor, the visible light camera and the spectroscope are fixed on a substrate, wherein the connection order of the short-wave infrared imaging objective lens, the spatial light modulator, the one-dimensional compression optical device and the short-wave infrared array sensor along the imaging direction of the optical path is:

[0017] First, a short-wave infrared imaging objective lens is placed, then a spatial light modulator is placed at an imaging position in the optical path output direction of the short-wave infrared imaging objective lens, a one-dimensional compression optical device is placed at an imaging position in the optical path output direction of the spatial light modulator, and finally a short-wave infrared array sensor is placed at an imaging position in the optical path output direction of the one-dimensional compression optical device;

[0018] The beam splitter is placed in front of the short-wave infrared imaging objective lens, forming an angle of 45° with the optical axis of the short-wave infrared imaging objective lens;

[0019] The visible light camera is placed above the beam splitter to obtain a visible light image of the scene.

[0020] Preferably, the short-wave infrared array sensor has a sensitive wavelength of 0.9 to 2.5 um.

[0021] Preferably, the implementation of the one-dimensional compression optical device includes:

[0022] Use a combination of convex and cylindrical lenses.

[0023] Preferably, the implementation method of the one-dimensional compression optical device further includes:

[0024] Use a combination of a convex lens and a cylindrical reflector.

[0025] Preferably, the implementation method of the one-dimensional compression optical device further includes:

[0026] The image on the spatial light modulator is directly imaged on a short-wave infrared array sensor whose pixel height is much larger than the pixel width through a convex lens.

[0027] Preferably, the implementation method of the one-dimensional compression optical device further includes:

[0028] An optical fiber is used to directly direct light from one column of the spatial light modulator to one pixel on the shortwave infrared array sensor.

[0029] Preferably, the two-dimensional code is a randomly shuffled Hadamard code.

[0030] Preferably, the two-dimensional code is a code obtained using a machine learning method.

[0031] In a second aspect, an embodiment of the present invention provides a method for imaging using the short-wave infrared imaging system described in the first aspect, comprising the following steps:

[0032] S1 uses a short-wave infrared imaging objective to image the scene and generate a two-dimensional image of the scene;

[0033] S2 uses a spatial light modulator to encode a two-dimensional image;

[0034] S3 compresses the encoded two-dimensional image into a one-dimensional image using a one-dimensional compression optical device;

[0035] S4 uses a short-wave infrared array sensor to measure the one-dimensional image compressed from the two-dimensional coded image;

[0036] S5: changing the two-dimensional code on the spatial light modulator and repeating the above steps S2-S4;

[0037] S6: Obtain a set number of two-dimensional codes and corresponding measurement values ​​through the above steps, and solve the linear equation corresponding to the two-dimensional image according to the set number of two-dimensional codes and the measurement values ​​corresponding to the one-dimensional image to obtain a two-dimensional image of the scene;

[0038] S7 repeats the above steps S1-S6 to obtain a video of the scene;

[0039] S8 fuses the visible light image acquired by the visible light camera with the short-wave infrared image to improve the imaging quality of the short-wave infrared imaging system.

[0040] Preferably, the one-dimensional compression optics compresses in a dimension that is aligned with a dimension of the spatial light modulator.

[0041] Preferably, the method further comprises:

[0042] When the dimension compressed by the one-dimensional compression optical device and one dimension of the spatial light modulator are not completely aligned, the correspondence between the pixels of the spatial light modulator and the pixels of the short-wave infrared linear array sensor is obtained through a calibration process and a two-dimensional image of the scene is reconstructed based on the correspondence.

[0043] The short-wave infrared imaging system provided by the embodiment of the present invention has the following beneficial effects:

[0044] It improves the imaging quality of short-wave infrared images, has low cost, high luminous flux, spatial resolution and frame rate, contains no mechanical moving parts, has strong stability, and can capture real-time megapixel video. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of the structure of a short-wave infrared imaging system provided by an embodiment of the present invention;

[0046] Figure 2a-2e Schematic diagrams of optical paths of five implementations of one-dimensional compression optical devices provided by embodiments of the present invention;

[0047] Figure 3a A schematic diagram of a light path in a non-compressed dimension for compressing a two-dimensional image in one dimension using a cylindrical mirror provided in an embodiment of the present invention;

[0048] Figure 3b A schematic diagram of a light path in a compression dimension for compressing a two-dimensional graphic in one dimension using a cylindrical mirror provided in an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of the effect of compressing a two-dimensional image in one dimension using a one-dimensional compression optical device with a cylindrical mirror;

[0050] Figure 5a This is a schematic diagram of the image effect taken by a visible light camera (which is only sensitive to visible light with a wavelength of 0.4um to 0.7um);

[0051] Figure 5b A schematic diagram of an image effect captured by a short-wave infrared imaging system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The present invention is described in detail below with reference to specific drawings and embodiments.

[0053] like Figure 1 As shown, the short-wave infrared imaging system provided by the embodiment of the present invention includes a short-wave infrared imaging objective lens 1, a spatial light modulator 2, a one-dimensional compression optical device 3 and a short-wave infrared array sensor 4, a visible light camera 6, a spectroscope 5 and a computing device (not shown in the figure), wherein:

[0054] A short-wave infrared imaging objective lens 1, used for imaging a scene and generating a two-dimensional image of the scene;

[0055] A spatial light modulator 2, used for encoding a two-dimensional image using a two-dimensional code, wherein the two-dimensional code can be changed by programming;

[0056] A one-dimensional compression optical device 3, used for optically compressing the encoded two-dimensional image into a one-dimensional image;

[0057] A short-wave infrared array sensor 4, used for measuring the one-dimensional image;

[0058] The computing device is used to reconstruct a two-dimensional image of the scene based on a set number of two-dimensional codes and measurement results of corresponding one-dimensional images;

[0059] A beam splitter 5, for transmitting short-wave infrared light and reflecting visible light;

[0060] The visible light camera 6, as a viewfinder, is used to fuse the visible light image with the short-wave infrared light image to improve the imaging quality of the short-wave infrared imaging system.

[0061] Optionally, the short-wave infrared imaging objective lens 1, the spatial light modulator 2, the one-dimensional compression optical device 3, the short-wave infrared array sensor 4, the visible light camera 6 and the spectroscope 5 are fixed on a substrate, wherein the connection sequence of the short-wave infrared imaging objective lens 1, the spatial light modulator 2, the one-dimensional compression optical device 3 and the short-wave infrared array sensor 4 along the imaging direction of the optical path is:

[0062] First, a short-wave infrared imaging objective lens 1 is placed, and then a spatial light modulator 2 is placed at an imaging position in the optical path output direction of the short-wave infrared imaging objective lens 1, and a one-dimensional compression optical device 3 is placed at an imaging position in the optical path output direction of the spatial light modulator 2, and finally a short-wave infrared array sensor 4 is placed at an imaging position in the optical path output direction of the one-dimensional compression optical device 3;

[0063] The beam splitter 5 is placed in front of the short-wave infrared imaging objective lens 1, and forms an angle of 45° with the optical axis of the short-wave infrared imaging objective lens 1;

[0064] The visible light camera 6 is placed above the beam splitter 5 to obtain a visible light image of the scene.

[0065] Optionally, the sensitive wavelength of the short-wave infrared array sensor 4 is 0.9-2.5 um.

[0066] Optionally, the implementation of the one-dimensional compression optical device 3 includes:

[0067] like Figure 2a and Figure 2b As shown, a combination of a convex lens and a cylindrical lens is used, wherein, Figure 2bAberrations are reduced by using more components and compressing the light in the parallel light domain.

[0068] Optionally, the implementation of the one-dimensional compression optical device 3 further includes:

[0069] like Figure 2c As shown, a combination of a convex lens and a cylindrical reflector is used.

[0070] Optionally, the implementation of the one-dimensional compression optical device 3 further includes:

[0071] like Figure 2d As shown, the image on the spatial light modulator 2 is directly imaged on the short-wave infrared array sensor 4 through a convex lens, the pixel height of which is much larger than the pixel width.

[0072] As a specific embodiment, each pixel of the short-wave infrared array sensor 4 is rectangular, and the height of the pixel is much larger than the width of the pixel (the distance between pixels). For example, the size of each pixel is 5 mm × 25 μm, where 5 mm is the height of the pixel and 25 μm is the width of the pixel. Each high pixel collects the sum of the light of the corresponding column on the spatial light modulator 2.

[0073] Optionally, the implementation of the one-dimensional compression optical device 3 further includes:

[0074] like Figure 2e As shown, an optical fiber is used to directly guide a column of light on the spatial light modulator into a pixel on the short-wave infrared array sensor 4.

[0075] Optionally, the two-dimensional code is a randomly shuffled Hadamard code.

[0076] Optionally, the two-dimensional code is a code obtained using a machine learning method.

[0077] An embodiment of the present invention provides a method for imaging using a short-wave infrared imaging system, comprising the following steps:

[0078] S101, using a short-wave infrared imaging objective lens 1 to image a scene to generate a two-dimensional image of the scene;

[0079] S102, encoding the two-dimensional image using the spatial light modulator 2;

[0080] S103, compressing the encoded two-dimensional image into a one-dimensional image using a one-dimensional compression optical device 3;

[0081] S104, using a short-wave infrared array sensor to measure a one-dimensional image compressed from the two-dimensional coded image;

[0082] S105, changing the two-dimensional code on the spatial light modulator 2, and repeating the above steps S102-S104;

[0083] S106, through the above steps, a set number of two-dimensional codes and corresponding measurement values ​​are obtained, and according to the set number of two-dimensional codes and the measurement values ​​corresponding to the one-dimensional image, a linear equation corresponding to the two-dimensional image is solved to obtain a two-dimensional image of the scene;

[0084] S107, repeating the above steps S101-S106 to obtain a video of the scene;

[0085] S108, fusing the visible light image acquired by the visible light camera with the short-wave infrared light image to improve the imaging quality of the short-wave infrared imaging system.

[0086] As a specific embodiment, the short-wave infrared array sensor 4 obtains multiple measurement values ​​of the same scene under different encodings of the next-dimensional image. When the number of encodings is sufficient, the known two-dimensional code and the corresponding measurement value are used to reconstruct the image by solving a linear equation. Assume that the unknown image is a two-dimensional matrix X with a resolution of h×w. Assume the following simple situation: the resolution of the spatial light modulator 2 is also h×w, and each column of the encoding on the spatial light modulator 2 is the same, which is a row vector a of 1×h. Then each measurement of the short-wave infrared array sensor 4 is y=a·X, where · represents the multiplication of the vector and the matrix. By changing the encoding, different measurements can be obtained, y1=a1·X, y2=a2·X, ..., and they are combined into a set of equations, which can be written as Y=A·X, where Y=[y1; y2; y3; ...], A=[a1; a2; a3; ...]. Since A and Y are known, X can be calculated. The linear equation can be full rank or underdetermined (for example, using 10% or 1% measurements to improve temporal resolution). If the linear equation is underdetermined, it can be solved by optimization methods (such as compressed sensing algorithms with L1 norm constraints that minimize image gradients) or deep neural networks (such as autoencoder-decoder structures).

[0087] Optionally, the dimension of compression by the one-dimensional compression optics 3 is aligned with one dimension of the spatial light modulator 2 .

[0088] As a specific embodiment, if the resolution of the spatial light modulator 2 is h×w, the dimension corresponding to h is compressed, the number of pixels of the short-wave infrared array sensor 4 is n, and the resolution of the final image is h×n. Generally, the value of n is less than or equal to w.

[0089] Optionally, the method further comprises:

[0090] When the compression dimension of the one-dimensional compression optical device 3 and one dimension of the spatial light modulator 2 are not completely aligned, the correspondence between the pixels of the spatial light modulator 2 and the pixels of the short-wave infrared linear array sensor is obtained through a calibration process and a two-dimensional image of the scene is reconstructed based on the correspondence. Figure 5b This is an image captured using a short-wave infrared imaging objective lens 1, a spatial light modulator 2, a one-dimensional compression optical device 3 using a cylindrical mirror, and a short-wave infrared linear array sensor 4. Among them, the focal length of the short-wave infrared imaging objective lens 1 is 50mm, the resolution of the spatial light modulator 2 is 768pix×1024pix, the size of each pixel (micromirror) is 13.8um×13.8um, and the code is changed 20K times per second. The short-wave infrared linear array sensor 4 uses an InGaAs linear array sensor with 512 pixels and a pixel size of 500um×25um, and can output 10K columns of images per second. The shorter one dimension of the spatial light modulator 2 is compressed. The resolution of the output image is 768pix×512pix, and the video time resolution is 20fps. Figure 5b It can be seen that the image taken by the short-wave infrared imaging system provided by the embodiment of the present invention can see through the black ink here.

[0091] Among them, when collecting video, each frame can be solved separately, or multiple frames can be solved together. When multiple frames are solved together, the redundancy between frames can be used to obtain higher quality reconstruction. When a visible light camera is used to fuse visible light images and short-wave infrared images to improve the imaging quality of short-wave infrared images, the gradient information and motion information (optical flow) of the visible light image can be fused to the short-wave infrared imaging, which can greatly improve the imaging quality. If the spatial resolution of the visible light image is very high, such as 12 million pixels, it can also help improve the spatial resolution of the short-wave infrared image. This type of method is generally called image fusion and guides image reconstruction.

[0092] The shortwave infrared imaging system provided by the embodiment of the present invention includes a shortwave infrared imaging objective lens, a spatial light modulator, a one-dimensional compression optical device, a shortwave infrared array sensor visible light camera, a spectroscope and a computing device, wherein the shortwave infrared imaging objective lens is used to image a scene and generate a two-dimensional image of the scene, the spatial light modulator is used to encode the two-dimensional image of the scene using a displayed two-dimensional code, the one-dimensional compression optical device is used to optically compress the encoded two-dimensional image into a one-dimensional image, the shortwave infrared array sensor is used to measure the one-dimensional image, the computing device is used to reconstruct the two-dimensional image of the scene according to a set number of two-dimensional codes and the measurement results of the corresponding one-dimensional image, the spectroscope is used to absorb shortwave infrared light and reflect visible light, and the visible light camera is used to fuse the visible light image with the shortwave infrared light image, thereby improving the imaging quality of the shortwave infrared image, reducing the cost, improving the luminous flux, resolution and frame rate, and enhancing the stability.

[0093] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0094] It can be understood that the relevant features in the above methods and devices can refer to each other.

[0095] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0096] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing such systems. In addition, the present invention is not directed to any specific programming language either. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description of the above specific languages ​​is for disclosing the best mode of the present invention.

[0097] In addition, the memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0098] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0099] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0100] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0101] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0102] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0103] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A short-wave infrared imaging system, characterized in that: It includes a short-wave infrared imaging objective lens, a spatial light modulator, a one-dimensional compression optical device, a short-wave infrared array sensor, a visible light camera, a spectroscope and a computing device, wherein: The short-wave infrared imaging objective lens is used to image a scene and generate a two-dimensional image of the scene; The spatial light modulator is used to encode the two-dimensional image using a two-dimensional code, wherein the two-dimensional code can be changed by programming; The one-dimensional compression optical device is used to optically compress the encoded two-dimensional image into a one-dimensional image; The short-wave infrared array sensor is used to measure the one-dimensional image; The computing device is used to reconstruct a two-dimensional image of the scene based on a set number of two-dimensional codes and measurement results of corresponding one-dimensional images; The spectroscope is used to transmit short-wave infrared light and reflect visible light; The visible light camera, as a viewfinder, is used to fuse the visible light image with the short-wave infrared light image to improve the imaging quality of the short-wave infrared imaging system.

2. The shortwave infrared imaging system according to claim 1, characterized in that: The short-wave infrared imaging objective lens, the spatial light modulator, the one-dimensional compression optical device, the short-wave infrared array sensor, the visible light camera and the spectroscope are fixed on a substrate, wherein the connection sequence of the short-wave infrared imaging objective lens, the spatial light modulator, the one-dimensional compression optical device and the short-wave infrared array sensor along the imaging direction of the optical path is: First, a short-wave infrared imaging objective lens is placed, then a spatial light modulator is placed at an imaging position in the optical path output direction of the short-wave infrared imaging objective lens, a one-dimensional compression optical device is placed at an imaging position in the optical path output direction of the spatial light modulator, and finally a short-wave infrared array sensor is placed at an imaging position in the optical path output direction of the one-dimensional compression optical device; The beam splitter is placed in front of the short-wave infrared imaging objective lens, forming an angle of 45° with the optical axis of the short-wave infrared imaging objective lens; The visible light camera is placed above the beam splitter to obtain a visible light image of the scene.

3. The shortwave infrared imaging system according to claim 1, characterized in that: The short-wave infrared array sensor has a sensitive wavelength of 0.9 to 2.5 um.

4. The shortwave infrared imaging system according to claim 1, characterized in that: The implementation method of the one-dimensional compression optical device includes: Use a combination of convex and cylindrical lenses.

5. The short-wave infrared imaging system according to claim 1, characterized in that: The implementation method of the one-dimensional compression optical device also includes: Use a combination of a convex lens and a cylindrical reflector.

6. The shortwave infrared imaging system according to claim 1, characterized in that: The implementation method of the one-dimensional compression optical device also includes: The image on the spatial light modulator is directly imaged on a short-wave infrared array sensor whose pixel height is much larger than the pixel width through a convex lens.

7. The short-wave infrared imaging system according to claim 1, characterized in that: The implementation method of the one-dimensional compression optical device also includes: An optical fiber is used to directly direct light from one column of the spatial light modulator to one pixel on the shortwave infrared array sensor.

8. The shortwave infrared imaging system according to claim 1, characterized in that: The two-dimensional code is a randomly shuffled Hadamard code.

9. The shortwave infrared imaging system according to claim 1, characterized in that: The two-dimensional code is a code obtained by using a machine learning method.

10. A method for imaging using the short-wave infrared imaging system according to any one of claims 1 to 9, characterized in that: include: S1 uses a short-wave infrared imaging objective to image the scene and generate a two-dimensional image of the scene; S2 encodes the two-dimensional image using a spatial light modulator; S3 compresses the encoded two-dimensional image into a one-dimensional image using a one-dimensional compression optical device; S4 uses a short-wave infrared array sensor to measure the one-dimensional image compressed from the two-dimensional coded image; S5: changing the two-dimensional code on the spatial light modulator, and repeating the above steps S2-S4; S6: Obtain a set number of two-dimensional codes and corresponding measurement values ​​through the above steps, and solve the linear equation corresponding to the two-dimensional image according to the set number of two-dimensional codes and the measurement values ​​corresponding to the one-dimensional image to obtain a two-dimensional image of the scene; S7 repeats the above steps S1-S6 to obtain a video of the scene; S8 fuses the visible light image acquired by the visible light camera with the short-wave infrared image to improve the imaging quality of the short-wave infrared imaging system.

11. The method according to claim 10, characterized in that One-dimensional compression optics align the dimension of compression with one dimension of the spatial light modulator.

12. The method according to claim 10, characterized in that The method further comprises: When the dimension compressed by the one-dimensional compression optical device and one dimension of the spatial light modulator are not completely aligned, the correspondence between the pixels of the spatial light modulator and the pixels of the short-wave infrared linear array sensor is obtained through a calibration process and a two-dimensional image of the scene is reconstructed based on the correspondence.

Images