Multi-spectral imaging control method for large field of view multi-detector mosaic

Abstract

The present application relates to multispectral imaging control technical field, especially to a kind of multispectral imaging control method of large field of view multi-piece detector splicing, and each piece of detector is assigned unique address, and the spectral segment of each piece of detector is defined, and imaging controller is according to the address where detector is located is odd or even, the exposure trigger signal of each spectral segment, spectral segment selection address, imaging parameter and the selection control of image data channel are carried out.The present application does not need the intervention of external instruction etc.;It is divided into two groups of odd and even, and it is not easy to appear error relatively.;And on the hardware design, a single circuit board can meet the application requirements of project, can reduce the type of circuit board, reduce processing cost, improve the interchangeability between products at the same time, facilitate cross checking problem.

Description

Technical Field

[0001] This invention relates to the field of multi-spectral imaging control technology, and in particular to a multi-spectral imaging control method using a large field-of-view multi-detector splicing. Background Technology

[0002] Since the number of pixels in a single detector is limited, for applications with a large field of view, it is usually necessary to stitch multiple detectors together to form a larger equivalent number of pixels. A multi-spectral detector formed by stitching together multiple detectors can simultaneously obtain information on multiple spectral bands of the same ground feature, and has advantages such as good stability and high reliability in resource surveys and monitoring.

[0003] like Figure 4a As shown, the multi-spectral detector employs a two-dimensional array. One direction represents the pixel dimension, corresponding to the period from the first pixel to the last pixel, while the other direction represents the spectral dimension, corresponding to the period from the first spectral band to the second p spectral band. When the multi-spectral detector is applied to a semi-reflective optical system, during the stitching process of multiple detectors, half of the detectors directly receive the light signal; the other half receives the light signal after reflection by a mirror. Relative to the half of the detector without a mirror, the externally input scene is projected in a mirror image.

[0004] like Figure 4b As shown, for the half of the detector that produces the mirror effect, to ensure that the pixel order of each detector is the same, even if the spectral dimension is mirrored, the pixel data order can remain unchanged. Information between the detector's spectral bands needs to be exchanged. The physical 1st spectral band of the detector is defined as the 2pth spectral band, and the physical 2pth spectral band is defined as the 1st spectral band, and so on. Not only the exposure trigger signals of each spectral band need to be exchanged, but also the spectral band selection address, imaging parameters, and image data channels. This exchange operation can be implemented in hardware, requiring the design of two different circuit boards depending on whether the detector exhibits a mirror effect. The detector's pin connections have two states, doubling the design workload, increasing the cost of manufacturing the circuit boards, and lengthening the product design cycle.

[0005] For applications involving the near-infrared spectral band, multi-band detectors exhibit low quantum efficiency and weak spectral energy within this band. For narrow-band applications, the number of electrons generated in this band is limited, resulting in a low signal-to-noise ratio (SNR), which can negatively impact target identification and precise quantitative resource content retrieval, such as for terrestrial water resource content. To improve the SNR, a common approach is to design multi-band detectors in TDI (Transient Induction Difference) mode, using multiple integrations to increase the SNR. However, this approach has drawbacks: using TDI mode requires a larger focal plane, increasing system size and weight; furthermore, TDI multi-band detectors are expensive due to their complex manufacturing process and low cost, and they consume more power, necessitating larger cooling plates on the satellite for heat dissipation, and requiring more powerful thermal control instruments. Summary of the Invention

[0006] In view of the above problems, this invention proposes a multi-spectral imaging control method for large field of view multi-detector stitching. Each detector is assigned a unique address, and the exposure trigger signal, spectrum selection address, imaging parameters and image data channel selection are controlled according to whether the address of the detector is odd or even.

[0007] The multi-spectral imaging control method for large field-of-view multi-detector stitching proposed in this invention includes the following steps: S1. Assign a unique address to each detector and define 2p spectral bands for each detector; where, For detectors with even-numbered addresses, spectral bands 1, 3, 5, 7, 9, ..., 2p-1 are defined as spectral band numbers b1, b2, b3, b4, b5, ..., b p ; For detectors with odd-numbered addresses, the spectral bands 2p, 2×(p-1), 2×(p-2), 2×(p-3), 2×(p-4), 2×(p-5), ..., 2 are defined as spectral band numbers B1, B2, B3, B4, B5, ..., B, respectively. p ; The 1, ..., p spectral bands of each detector are defined as the upper side of the detector, and the p+1, ..., 2p spectral bands of each detector are defined as the lower side of the detector. S2, the imaging controller selects and controls the exposure trigger signal, spectral selection address, imaging parameters, and image data channel for each detector based on whether the address of each detector is odd or even; among which, The selection and control of the exposure trigger signal are as follows: For detectors with even addresses: The detector's spectral trigger signal i = the camera's spectral trigger signal i; For detectors with odd addresses: The detector's spectral trigger signal pi = the camera's spectral trigger signal i; Where i is the corresponding spectral segment number; The selection of the spectral band address is controlled as follows: For detectors with even addresses: The detector's top row address = the camera's spectral selection address - p / 2; The detector's lower row address equals the camera's spectral selection address; For detectors with odd addresses: The detector's top row address = p - camera's spectral selection address - p / 2; The detector's lower row address = p / 2 - the camera's spectral selection address; The selection and control of imaging parameters are as follows: For detectors with even addresses: The upper coarse adjustment gain of the detector equals the upper coarse adjustment gain of the camera. The detector's lower coarse adjustment gain equals the camera's lower coarse adjustment gain. The fine-tuning gain of the detector is equal to the fine-tuning gain of the camera. The detector's lower fine-tuning gain equals the camera's lower fine-tuning gain. The upper dark field of the detector equals the upper dark field of the camera; The dark field below the detector equals the dark field below the camera; For detectors with odd addresses: The upper coarse adjustment gain of the detector equals the lower coarse adjustment gain of the camera. The detector's lower coarse adjustment gain equals the camera's upper coarse adjustment gain. The fine-tuning gain of the detector's upper side equals the fine-tuning gain of the camera's lower side. The detector's lower fine-tuning gain equals the camera's upper fine-tuning gain. The upper dark field of the detector equals the lower dark field of the camera; The dark field at the bottom of the detector equals the dark field at the top of the camera; The selection control for image data channels is as follows: For detectors with even addresses: The detector's upper data channel equals the camera's upper data channel; The detector's lower data channel equals the camera's lower data channel; For detectors with odd addresses: The detector's lower data channel equals the camera's upper data channel; The upper data channel of the detector equals the lower data channel of the camera.

[0008] Preferably, each spectral band of each detector uses an independent trigger signal for exposure control, and the upper side of all detectors shares the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field; the lower side of all detectors shares the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field, and is set independently relative to the upper side of all detectors.

[0009] Preferably, the initial states of each control state machine within the imaging controller are controlled as follows: (1) For each control state machine that enters a non-default state and returns to the default state as the count value of the self-starting state counter increases, there is no need to process each control state machine. (2) For each control state machine that returns to the default state in front of the camera as the working sequence is continuously output, there is no need to process each control state machine when it enters a non-default state. (3) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and whose state is determined immediately after the imaging controller is powered on, the phase-locked loop state signal is used to control the initial state of each control state machine. (4) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and immediately determines the state after the detector is powered on, the detector power-on state signal is used to control the initial state of each control state machine. (5) For each control state machine that enters a non-default state, cannot return to the default state without external input control signal, and needs to determine the state after the camera is captured, the camera state signal is used to control the initial state of each control state machine.

[0010] Preferably, identical filters are attached to n adjacent spectral bands of each detector, and the n identical spectral bands are imaged simultaneously. After being transmitted to the ground and matched with pixels, the identical image content is accumulated.

[0011] Compared with the prior art, the present invention can achieve the following technical effects: 1. For the selection and control of exposure trigger signals, spectral selection addresses, imaging parameters and image data channels for different detectors, a single circuit board can meet the application requirements in terms of hardware design. This can reduce the types of circuit boards, reduce processing costs, improve the interchangeability between products, and facilitate cross-troubleshooting.

[0012] 2. The distinction between mirror and non-mirror detectors is achieved through software. The hardware design requires only one circuit board. The software needs to clearly define whether the currently controlled multi-spectral detector is a mirror or non-mirror detector, requiring an input from the hardware design. To differentiate between the various multi-spectral detectors, a control selection method based on coded addresses is used. In the hardware design, each detector is assigned a unique address. The selection and control of exposure trigger signals, spectral selection addresses, imaging parameters, and image data channels for each spectral band are based on whether the detector's address is odd or even. This allows the imaging controller to automatically determine whether the currently processed multi-spectral detector is a mirror or non-mirror detector based on the coded address, and to select and control the various signals accordingly. External communication commands are not required for setting the mirror and non-mirror detector status. Dividing the addresses of each detector into odd and even groups in the hardware reduces the likelihood of errors.

[0013] 3. This invention applies identical filters only to n adjacent spectral bands on a multi-band detector; the n identical spectral bands are imaged simultaneously, and after pixel matching on the ground, the identical image content is accumulated, resulting in a signal-to-noise ratio improvement approaching... The invention does not require additional optical engine size and weight, nor does it require additional radiant cooling plate area and thermal compensation power consumption, thus significantly reducing the procurement cost compared to TDI multi-spectral detectors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the logical structure of a multi-spectral imaging system with a large field of view and multiple detectors stitched together, provided in an embodiment of the present invention.

[0015] Figure 2 This is a flowchart illustrating a multi-spectral imaging control method for large field-of-view multi-detector splicing provided in an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the arrangement of p spectral bands in the 2p spectral band of two detectors provided according to an embodiment of the present invention; Figure 4a This is a schematic diagram of a two-dimensional array of a multi-spectral detector without mirroring, provided according to an embodiment of the present invention. Figure 4b This is a schematic diagram of a two-dimensional array of a multi-band detector with spectral dimension mirroring provided in an embodiment of the present invention.

[0017] Figure reference numerals: 1. Camera controller; 2. Imaging controller power supply chip; 3. Imaging controller; 4. Detector power supply chip; 5. Multi-spectral detector; 6. Erasable main and backup flash; 7. PROM; 8. MRAM; 9. Cameralink chip; 10. Cameralink connector; 11. 2711 chip; 12. 2711 connector. Detailed Implementation

[0018] In the following description, embodiments of the invention will be described with reference to the accompanying drawings. In the description below, the same modules are denoted by the same reference numerals. Where the same reference numerals are used, their names and functions are also the same. Therefore, their detailed description will not be repeated.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0020] This invention provides a multi-spectral imaging control method for stitching together multiple detectors with a large field of view. Before describing the imaging control method in detail, a multi-spectral imaging system for stitching together multiple detectors with a large field of view is first explained.

[0021] Figure 1 The logical structure of a multi-spectral imaging system with a large field of view and multiple detectors stitched together, provided in an embodiment of the present invention, is shown.

[0022] like Figure 1As shown in the figure, the multi-spectral imaging system with a large field of view and multiple detectors stitched together according to the embodiments of the present invention includes a camera controller 1, an imaging controller power supply chip 2, an imaging controller 3, a detector power supply chip 4, a multi-spectral detector 5, erasable main and backup flash 6, a PROM 7, an MRAM 8, a cameralink chip 9, a cameralink connector 10, a 2711 chip 11, and a 2711 connector 12; wherein, the camera controller 1 receives a primary power supply from an external input and generates various power supplies required; it also receives a second pulse from an external input and communicates with the outside via a 1553 bus; the camera controller 1 communicates with the imaging controller 3 via a 422 communication signal and provides the imaging controller 3 with a second pulse, and so on. The imaging controller 3 is powered by the imaging controller power supply chip 2. The imaging controller 3 provides drive control signals to the multi-spectral detector 5, which is composed of multiple detectors, and provides power to the multi-spectral detector 5 through the detector power supply chip 4. It also receives serial image data output by the multi-spectral detector 5. The imaging controller 3 is connected to the PROM 7 and the erasable main and backup flash 6, and is also connected to the MRAM 8 to update the correction coefficients and load the correction coefficients before each shooting. The imaging controller 3 can output image data through the cameralink chip 9 and cameralink connector 10, or through the 2711 chip 11 and 2711 connector 12, depending on the selection.

[0023] The imaging controller power supply chip 2 uses a DC-DC power module from the Lanzhou Institute of Space Technology Physics; the multi-spectral detector 5 uses a multi-spectral detector from Changchun Changguang Chenxin Optoelectronic Technology Co., Ltd.; the camera controller 1 uses a DSP chip; the imaging controller 3 uses an imaging controller and refresh chip from Shanghai Fudan Microelectronics Co., Ltd.; the detector power supply chip 4 uses an LDO from TI; the 2711 chip 11 uses a TLK2711 chip; the 2711 connector 12 uses a micro coaxial connector from Sichuan Huafeng; the cameralink chip 9 uses a DS90CR287; the cameralink connector 10 uses a 3M MDR26 connector; the erasable main and backup flash 6 uses products from Shanghai Fudan Microelectronics Group Co., Ltd.; the PROM 7 uses a product from Xilinx; and the MRAM 8 uses a product from Xi'an Microelectronics Technology Research Institute.

[0024] Figure 2 The flowchart of a multi-spectral imaging control method for large field-of-view multi-detector stitching provided in an embodiment of the present invention is shown.

[0025] like Figure 2 As shown in the embodiment of the present invention, the multi-spectral imaging control method for large field-of-view multi-detector stitching includes the following steps: S1. Assign a unique address to each detector and define the 2p spectral bands of each detector.

[0026] To differentiate between the various detectors, each detector is assigned a unique address. Based on whether the detector's address is odd or even, the exposure trigger signal, spectral selection address, imaging parameters, and image data channel selection for each spectral band are controlled. This allows the imaging controller to automatically determine whether the currently processed multi-spectral detector is a mirror detector or a non-mirror detector based on the coded address, and to select and control the various signals without requiring external communication commands to set the mirror or non-mirror detector status.

[0027] For example, a multi-band detector is composed of two detectors spliced ​​together. Each detector has 2p spectral bands. Two addresses are assigned to the two detectors, and each detector corresponds to a unique address, which can be in Arabic numerals.

[0028] Figure 3 The diagram illustrates the arrangement of p spectral bands applied in the 2p spectral band of two detectors provided according to an embodiment of the present invention.

[0029] like Figure 3 As shown, the 2p spectral bands for each detector are defined as follows: For detectors with even-numbered addresses, spectral bands 1, 3, 5, 7, 9, ..., 2p-1 are defined as spectral band numbers b1, b2, b3, b4, b5, ..., b p .

[0030] For detectors with odd-numbered addresses, the spectral bands 2p, 2×(p-1), 2×(p-2), 2×(p-3), 2×(p-4), 2×(p-5), ..., 2 are defined as spectral band numbers B1, B2, B3, B4, B5, ..., B, respectively. p .

[0031] The 1, ..., p spectral bands of each detector are defined as the upper side of the detector, and the p+1, ..., 2p spectral bands of each detector are defined as the lower side of the detector. Each spectral band of each detector uses an independent trigger signal for exposure control. The upper sides of all detectors share the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field; the lower sides of all detectors share the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field, and are set independently relative to the upper sides of all detectors.

[0032] The connection relationship between odd-numbered and even-numbered detectors and the imaging controller is the same; the difference between odd-numbered and even-numbered detectors is that the encoded address of the imaging controller (i.e., the address assigned to the detector) is different.

[0033] S2. The imaging controller selects and controls the exposure trigger signal, spectral selection address, imaging parameters, and image data channel for each spectral band of each detector, based on whether the address of each detector is odd or even.

[0034] ①The selection and control of the exposure trigger signal are as follows: For detectors with even addresses: The detector's spectral trigger signal i is equal to the camera's spectral trigger signal i.

[0035] For detectors with odd addresses: The detector's spectral trigger signal pi is equal to the camera's spectral trigger signal i.

[0036] Where p is the number of spectral bands of the detector, and i is the spectral band number corresponding to the detector.

[0037] ②The selection of the spectral band address is controlled as follows: For detectors with even addresses: The detector's top row address = camera's spectral selection address - p / 2.

[0038] The detector's lower row address equals the camera's spectral selection address.

[0039] For detectors with odd addresses: The detector's top row address = p - camera's spectral selection address - p / 2.

[0040] The detector's lower row address = p / 2 - the camera's spectral selection address.

[0041] ③The selection and control of imaging parameters are as follows: For detectors with even addresses: The upper coarse adjustment gain of the detector equals the upper coarse adjustment gain of the camera.

[0042] The detector's lower coarse adjustment gain equals the camera's lower coarse adjustment gain.

[0043] The fine-tuned gain of the detector is equal to the fine-tuned gain of the camera.

[0044] The detector's lower fine-tuning gain equals the camera's lower fine-tuning gain.

[0045] The upper dark field of the detector equals the upper dark field of the camera.

[0046] The dark field below the detector equals the dark field below the camera.

[0047] For detectors with odd addresses: The upper coarse adjustment gain of the detector equals the lower coarse adjustment gain of the camera.

[0048] The detector's lower coarse adjustment gain equals the camera's upper coarse adjustment gain.

[0049] The fine-tuning gain of the detector's upper side equals the fine-tuning gain of the camera's lower side.

[0050] The detector's lower fine-tuning gain equals the camera's upper fine-tuning gain.

[0051] The upper dark field of the detector equals the lower dark field of the camera.

[0052] The dark field at the bottom of the detector equals the dark field at the top of the camera.

[0053] ④ The selection and control of image data channels are as follows: For detectors with even addresses: The upper data channel of the detector is equal to the upper data channel of the camera.

[0054] The detector's lower data channel equals the camera's lower data channel.

[0055] For detectors with odd addresses: The lower data channel of the detector equals the upper data channel of the camera.

[0056] The upper data channel of the detector equals the lower data channel of the camera.

[0057] The initial states of each control state machine within the imaging controller are controlled as follows: (1) For each control state machine that enters a non-default state and returns to the default state as the count value of the self-starting state counter increases, there is no need to process each control state machine. (2) For each control state machine that returns to the default state in front of the camera as the working sequence is continuously output, there is no need to process each control state machine when it enters a non-default state. (3) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and whose state is determined immediately after the imaging controller is powered on, the phase-locked loop state signal is used to control the initial state of each control state machine. (4) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and immediately determines the state after the detector is powered on, the detector power-on state signal is used to control the initial state of each control state machine. (5) For each control state machine that enters a non-default state, cannot return to the default state without external input control signal, and needs to determine the state after the camera is captured, the camera state signal is used to control the initial state of each control state machine.

[0058] When a multispectral imaging system uses a semi-reflective and semi-transparent optical system, especially when the number of spectral bands in the multispectral imaging system does not exceed half of the total number of spectral bands, the spectral bands of the detector can be arranged at intervals to increase the spacing of the multispectral filters and reduce the difficulty of spectral band registration.

[0059] To improve the signal-to-noise ratio (SNR) of multi-band imaging systems applied to the near-infrared spectral band, identical filters are attached to n adjacent spectral bands on the multi-band detector. Simultaneous imaging of these n identical spectral bands, followed by pixel matching and accumulation of identical image content after transmission to the ground, significantly improves the SNR. It can achieve the same results as TDI multi-band detectors without increasing the size and weight of the optical engine, or requiring additional radiant cooling plate area and thermal compensation power consumption. The procurement cost can also be significantly reduced compared to TDI multi-band detectors.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this invention disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this invention can be achieved, and this is not limited herein.

[0061] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A multi-spectral imaging control method for large field-of-view multi-detector stitching, characterized in that, Includes the following steps: S1. Assign a unique address to each detector and define 2p spectral bands for each detector; where, For detectors with even-numbered addresses, spectral bands 1, 3, 5, 7, 9, ..., 2p-1 are defined as spectral band numbers b1, b2, b3, b4, b5, ..., b p ; For detectors with odd-numbered addresses, the spectral bands 2p, 2×(p-1), 2×(p-2), 2×(p-3), 2×(p-4), 2×(p-5), ..., 2 are defined as spectral band numbers B1, B2, B3, B4, B5, ..., B, respectively. p ; The 1, ..., p spectral bands of each detector are defined as the upper side of the detector, and the p+1, ..., 2p spectral bands of each detector are defined as the lower side of the detector. S2, the imaging controller selects and controls the exposure trigger signal, spectral selection address, imaging parameters, and image data channel for each detector based on whether the address of each detector is odd or even; among which, The selection and control of the exposure trigger signal are as follows: For detectors with even addresses: Spectral trigger signal of the detector i =Camera's spectral trigger signal i ; For detectors with odd addresses: Spectral trigger signal of the detector p-i =Camera's spectral trigger signal i ; Where i is the corresponding spectral segment number; The selection of the spectral band address is controlled as follows: For detectors with even addresses: The detector's top row address = the camera's spectral selection address - p / 2; The detector's lower row address equals the camera's spectral selection address; For detectors with odd addresses: The detector's top row address = p - camera's spectral selection address - p / 2; The detector's lower row address = p / 2 - the camera's spectral selection address; The selection and control of imaging parameters are as follows: For detectors with even addresses: The upper coarse adjustment gain of the detector equals the upper coarse adjustment gain of the camera. The detector's lower coarse adjustment gain equals the camera's lower coarse adjustment gain. The fine-tuning gain of the detector is equal to the fine-tuning gain of the camera. The detector's lower fine-tuning gain equals the camera's lower fine-tuning gain. The upper dark field of the detector equals the upper dark field of the camera; The dark field below the detector equals the dark field below the camera; For detectors with odd addresses: The upper coarse adjustment gain of the detector equals the lower coarse adjustment gain of the camera. The detector's lower coarse adjustment gain equals the camera's upper coarse adjustment gain. The fine-tuning gain of the detector's upper side equals the fine-tuning gain of the camera's lower side. The detector's lower fine-tuning gain equals the camera's upper fine-tuning gain. The upper dark field of the detector equals the lower dark field of the camera; The dark field at the bottom of the detector equals the dark field at the top of the camera; The selection control for image data channels is as follows: For detectors with even addresses: The detector's upper data channel equals the camera's upper data channel; The detector's lower data channel equals the camera's lower data channel; For detectors with odd addresses: The detector's lower data channel equals the camera's upper data channel; The upper data channel of the detector equals the lower data channel of the camera.

2. The multi-spectral imaging control method for large field-of-view multi-detector stitching according to claim 1, characterized in that, Each spectral band of each detector uses an independent trigger signal for exposure control. The upper side of all detectors shares the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field. The lower side of all detectors shares the same spectral selection address, coarse adjustment gain, fine adjustment gain, and dark field, and is set independently relative to the upper side of each detector.

3. The multi-spectral imaging control method for large field-of-view multi-detector stitching according to claim 1, characterized in that, The initial states of each control state machine within the imaging controller are controlled as follows: (1) For each control state machine that enters a non-default state and returns to the default state as the count value of the self-starting state counter increases, there is no need to process each control state machine. (2) For each control state machine that returns to the default state in front of the camera as the working sequence is continuously output, there is no need to process each control state machine when it enters a non-default state. (3) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and whose state is determined immediately after the imaging controller is powered on, the phase-locked loop state signal is used to control the initial state of each control state machine. (4) For each control state machine that enters a non-default state, cannot return to the default state without an external input control signal, and immediately determines the state after the detector is powered on, the detector power-on state signal is used to control the initial state of each control state machine. (5) For each control state machine that enters a non-default state, cannot return to the default state without external input control signal, and needs to determine the state after the camera is captured, the camera state signal is used to control the initial state of each control state machine.

4. The multi-spectral imaging control method for large field-of-view multi-detector stitching according to claim 1, characterized in that, Identical filters are attached to n adjacent spectral bands of each detector. The n identical spectral bands are imaged simultaneously and transmitted to the ground. After pixel matching, the identical image content is accumulated.

Images