CN115208992A - Meta-imaging passive scanning system and method - Google Patents
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Abstract
The application relates to the technical field of imaging, in particular to a meta-imaging passive scanning system and a method, wherein the method comprises the following steps: acquiring a scanned image of a target object by utilizing a passive scanning method such as natural shake in the shooting process, shake of the image, movement of a sample and the like; estimating the relative motion of the sample to obtain a relatively accurate sampling position; and correcting the local dynamic structure area by combining a motion correction algorithm based on optical flow estimation of each view, and extracting a high-resolution target object image signal. Therefore, the problems that in the related technology, an optical path is complex, operation is difficult, synchronization of a scanning system and an imaging system is difficult, integration and miniaturization of the whole imaging system are difficult, the manufacturing cost is high, market requirements cannot be well met and the like are solved, and the imaging system has the advantages of being small in size, high in integration level, low in manufacturing cost, capable of achieving multi-dimensional high-resolution imaging, wide in application and the like.
Description
Technical Field
The present application relates to the field of imaging technologies, and in particular, to a system and a method for passive scanning of meta-imaging.
Background
With the continuous progress of the processing technology of the image sensor, a picture at ten million pixel level can be obtained under one exposure, but the problem that the data amount contained in the image is more and more huge and the acquisition dimension is still limited to two dimensions still follows. However, a real scene often needs high-resolution and complex high-dimensional information, and how to acquire a target object quickly, accurately and in real time through a two-dimensional sensor is always a current research hotspot.
In the related art, the most intuitive method is to scan the image by using a two-dimensional sensor dimension by dimension or to extract a three-dimensional signal by using a micro-lens array and a three-dimensional deconvolution algorithm.
However, the current optical scanning systems have the following disadvantages: (1) The optical path is complex, the operation is difficult, and the synchronism of the scanning system and the imaging system is difficult; (2) The volume is large, the integration and the miniaturization of the whole imaging system are difficult, and an optical test bed is usually required for assistance; (3) The manufacturing cost is high, and mechanical scanning galvanometer cost is ten thousand yuan, can't well satisfy the market demand.
Disclosure of Invention
The application provides a meta-imaging passive scanning system and a method, which are used for solving the problems that the optical path is complex and the operation is difficult, the synchronism of the scanning system and the imaging system is difficult, the integration and the miniaturization of the whole imaging system are difficult, the manufacturing cost is high, the market demand cannot be well met, and the like in the related technology.
The embodiment of the first aspect of the present application provides a meta-imaging passive scanning method, including the following steps:
acquiring a scanned image of a target object by using a passive scanning function of a meta-imaging system, wherein the passive scanning function is scanning by using natural shake in a shooting process, or shake of an image or movement of a sample;
estimating the relative motion of the target object based on the scanned image to obtain a target sampling position of the target object;
and based on a preset correction algorithm, obtaining a high-resolution image of the target object by means of the dispersive interpolation of dense sampling and the accurate equivalent scanning of each micro lens.
Optionally, after obtaining the scan image of the target object, the meta-imaging system further includes:
and advancing the high-resolution imaging speed of the target object by a preset advancing strategy until a camera frame rate condition is met.
Optionally, the meta-imaging system includes a photosensitive chip and a microlens array.
Optionally, the preset algorithm is based on a motion correction algorithm for optical flow estimation for each view.
The embodiment of the second aspect of the present application provides a meta-imaging passive scanning system, including:
an obtaining module, configured to obtain a scanned image of a target object by using a passive scanning function of the meta-imaging system, where the passive scanning function is to scan the target object by using natural shake in a shooting process, or shake of the image itself, or motion of a sample
The acquisition module is used for estimating the relative motion of the target object based on the scanned image and acquiring a target sampling position of the target object; and the generating module is used for obtaining a high-resolution image of the target object by means of the dispersive interpolation of dense sampling and the accurate equivalent scanning of each micro lens based on a preset correction algorithm.
Optionally, after obtaining the three-dimensional sampling image of the target object, the generating module further includes:
and advancing the high-resolution imaging speed of the target object by a preset advancing strategy until a camera frame rate condition is met.
Optionally, the meta-imaging system includes a photosensitive chip and a microlens array.
Optionally, the preset correction algorithm is a motion correction algorithm based on the optical flow estimation of each view.
An embodiment of a third aspect of the present application provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the meta imaging passive scanning method as described in the above embodiments.
A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the meta imaging passive scanning method according to the foregoing embodiment.
Thus, the meta-imaging passive scanning method of the embodiment of the present application has the following advantages.
(1) The scanning system and the imaging system are simple to operate, and the scanning system and the imaging system are excellent in synchronism. The passive mechanical scanning systems such as natural shake in the shooting process, shake of images or movement of samples are applied to an actual system, the problem that the scanning system and an imaging system are not synchronous is avoided, and the follow-up algorithm can realize accurate realization of high-resolution images.
(2) The volume is small, and the whole imaging system is integrated and miniaturized in the embodiment of the application. The system design is miniaturized, and can be integrated on various small instruments, such as a mobile phone. Compared with the original system, the whole system occupies almost no change in space.
(3) The price is low, and the embodiment of the application can meet the market demand. Compared with the oscillating mirror and the micro oscillating mirror, the system has low cost, quick response and good performance, and is suitable for mass production and market requirements.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flowchart of a meta-imaging passive scanning method according to an embodiment of the present application;
FIG. 2 is a schematic view of a microlens provided according to one embodiment of the present application;
FIG. 3 is a schematic diagram of the passive scanning principle of a meta-imaging system provided according to an embodiment of the present application;
FIG. 4 is a block diagram of a meta-imaging passive scanning system provided in accordance with an embodiment of the present application;
fig. 5 is a schematic view of an electronic device provided according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The meta-imaging passive scanning system and method of embodiments of the present application are described below with reference to the accompanying drawings. Aiming at the problems that the optical path of the related technology is complex and difficult to operate, the synchronism of a scanning system and an imaging system is difficult, the integration and the miniaturization of the whole imaging system are difficult, the manufacturing cost is high, the market demand cannot be well met and the like, which are mentioned in the background technology center, the application provides a meta-imaging passive scanning method.
Specifically, fig. 1 is a schematic flowchart of a meta-imaging passive scanning method according to an embodiment of the present disclosure.
As shown in fig. 1, the meta-imaging passive scanning method includes the following steps:
in step S101, a scanned image of the target object is acquired by using a passive scanning function of the meta-imaging system, wherein the passive scanning function is to scan by using natural shake during photographing, or shake of the image itself, or movement of the sample.
Optionally, in some embodiments, the meta-imaging system includes a light sensing chip and a micro-lens array.
Specifically, by utilizing natural shake in the shooting process, or shake of the image itself, or motion of the sample, passive scanning imaging is performed, for example, a human hand applies a vibration acting force to a scanning galvanometer system and/or an optical anti-shake system, so that the passive scanning device performs scanning based on the vibration action, and the optical lens maps the spectral information of the target object to the image surface.
In step S102, a target sampling position of the target object is acquired by estimating relative motion of the target object based on the scanned image.
It will be appreciated that in practice imaging passive scanning (natural dithering, or dithering of the image itself, or movement of the sample) can lead to the generation of artefacts during imaging, and therefore rigid motion correction is required. However, the motion of the target sample may be non-uniform and still produce residual artifacts after correction. Therefore, it is necessary to estimate the relative motion of the samples and obtain relatively accurate sampling positions.
Specifically, the embodiment of the present application may reflect the change of the image through optical flow information, and the optical flow includes information of the motion of the object, so that the observer may determine the motion of the object. And recovering the three-dimensional structure and the motion of the sample from the optical flow, and acquiring a relatively accurate sampling position.
Specifically, as shown in fig. 3, a high-resolution image is obtained by using natural shake in the shooting process, or shake of the image itself, or motion passive scanning imaging of the sample, estimating relative motion of the sample, obtaining a relatively accurate sampling position, and based on a motion correction algorithm of optical flow estimation of each view, through dispersed interpolation of dense sampling and a precise equivalent scanning position of each microlens.
In step S103, a high-resolution image of the target object is obtained by performing a distributed interpolation of dense sampling and a precise equivalent scanning of the target sampling position of each microlens based on a preset correction algorithm.
Optionally, in some embodiments, after obtaining the sampled image of the target object, the method further includes: and advancing the high-resolution imaging speed of the target object by a preset advancing strategy until the camera frame rate condition is met.
Optionally, in some embodiments, the preset algorithm is a motion correction algorithm based on an optical flow estimate for each view.
In particular, a sliding window of scan cycles is used to realign multiple low resolution images to a high resolution image at the same time sampling rate at a central point in time. Estimating optical flow maps from other resolution frames to a central resolution frame to calculate the exact coordinates of all low resolution sample points in the central time point and high resolution grid, and then obtaining a high resolution image through the dispersive interpolation of dense sampling and the exact equivalent scanning position of each microlens. .
According to the meta-imaging passive scanning method provided by the embodiment of the application, a relatively accurate sampling position is obtained by utilizing natural jitter in the shooting process, or the image self-jitter, or the motion passive scanning imaging of a sample, and a high-resolution image is obtained through the dispersed interpolation of dense sampling and the accurate equivalent scanning position of each micro lens based on the motion correction algorithm of the optical flow estimation of each view. Therefore, the problems that in the related technology, an optical path is complex, operation is difficult, synchronization of a scanning system and an imaging system is difficult, integration and miniaturization of the whole imaging system are difficult, manufacturing cost is high, market requirements cannot be well met and the like are solved, and the imaging system has the advantages of being small in size, high in integration level, low in manufacturing cost, capable of achieving multi-dimensional and multi-scale phase space imaging, wide in application and the like.
Next, a meta imaging passive scanning system proposed according to an embodiment of the present application is described with reference to the drawings.
Fig. 4 is a block schematic diagram of a meta-imaging passive scanning system according to an embodiment of the present application.
As shown in fig. 4, the meta-imaging passive scanning system 10 includes: an acquisition module 100, an acquisition module 200, and a generation module 300.
The acquiring module 100 is configured to acquire a scanned image obtained by scanning a target object by a passive scanning device;
an acquisition module 200, configured to acquire scanned image information of a target object;
the generating module 300 is configured to estimate a relative motion of a sample, obtain a relatively accurate sampling position, and obtain a high-resolution image through a distributed interpolation of dense sampling and a precise equivalent scanning position of each microlens based on a motion correction algorithm of an optical flow estimation of each view.
Optionally, in some embodiments, after obtaining the sample image of the target object, the generating module 300 further includes:
and propelling the three-dimensional imaging speed of the three-dimensional sampling image of the target object by a preset propelling strategy until the frame rate condition of the camera is met.
Optionally, in some embodiments, before acquiring the scan image obtained by scanning the target object with the passive scanning device, the acquiring module 100 further includes:
the natural shake in the shooting process or the shake of the image or the motion of the sample is used for passive scanning imaging.
Optionally, in some embodiments, the passive scanning device comprises a scanning galvanometer system.
Optionally, in some embodiments, the predetermined algorithm is a motion correction algorithm based on the optical flow estimate for each view.
Optionally, in some embodiments, the image acquisition unit is a CMOS sensor.
It should be noted that the foregoing explanation on the embodiment of the meta-imaging passive scanning method is also applicable to the meta-imaging passive scanning system of this embodiment, and details are not described here.
According to the meta-imaging passive scanning system provided by the embodiment of the application, natural jitter in the shooting process, or image self-jitter, or sample motion passive scanning imaging is utilized, the relative motion of the samples is estimated, a relatively accurate sampling position is obtained, and a high-resolution image is obtained through the dispersed interpolation of dense sampling and the accurate equivalent scanning position of each micro-lens based on the motion correction algorithm of the optical flow estimation of each view. Therefore, the problems that in the related technology, an optical path is complex, operation is difficult, synchronization of a scanning system and an imaging system is difficult, integration and miniaturization of the whole imaging system are difficult, manufacturing cost is high, market requirements cannot be well met and the like are solved, and the imaging system has the advantages of being small in size, high in integration level, low in manufacturing cost, capable of achieving multi-dimensional and multi-scale phase space imaging, wide in application and the like.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
The processor 502, when executing the program, implements the meta-imaging passive scanning method provided in the above-described embodiments.
Further, the electronic device further includes:
a communication interface 503 for communication between the memory 501 and the processor 502.
A memory 501 for storing computer programs that can be run on the processor 502.
The memory 501 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
Optionally, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a chip, the memory 501, the processor 502, and the communication interface 503 may complete communication with each other through an internal interface.
The processor 502 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the meta-imaging passive scanning method as above.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried out in the method of implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A meta-imaging passive scanning method, wherein the method comprises the steps of:
acquiring a scanned image of a target object by using a passive scanning function of a meta-imaging system, wherein the passive scanning function is to scan by using natural shake in a shooting process, or shake of an image or movement of a sample;
estimating the relative motion of the target object based on the scanned image, and acquiring a target sampling position of the target object;
and based on a preset correction algorithm, scanning the sampling position of the target through the dispersive interpolation of dense sampling and the accurate equivalence of each micro lens to obtain a high-resolution image of the target object.
2. The method of claim 1, further comprising, after obtaining the high resolution image of the target object:
and advancing the imaging speed of the high-resolution image of the target object by a preset advancing strategy until a camera frame rate condition is met.
3. The method of claim 2, wherein the meta-imaging system comprises a photosensitive chip and a micro-lens array.
4. The method according to claim 1, characterized in that the preset correction algorithm is a motion correction algorithm based on optical flow estimation of each view.
5. A meta-imaging passive scanning system, wherein the meta-imaging system has a passive scanning function, wherein the apparatus comprises:
an obtaining module, configured to obtain a scanned image of a target object by using a passive scanning function of a meta-imaging system, where the passive scanning function is to scan by using natural shake in a shooting process, shake of an image itself, or movement of a sample
The acquisition module is used for estimating the relative motion of the target object based on the scanned image and acquiring a target sampling position of the target object; and the generating module is used for scanning the target sampling position through the dispersive interpolation of dense sampling and the accurate equivalence of each micro lens based on a preset correction algorithm to obtain a high-resolution image of the target object.
6. The apparatus of claim 5, wherein after obtaining the three-dimensional sampled image of the target object, the generating module further comprises:
and advancing the high-resolution imaging speed of the target object by a preset advancing strategy until a camera frame rate condition is met.
7. The apparatus of claim 6, wherein the meta-imaging system comprises a photosensitive chip and a micro-lens array.
8. The apparatus of claim 5, wherein the predetermined correction algorithm is a motion correction algorithm based on optical flow estimation for each view.
9. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to implement the meta imaging passive scanning method of any of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored, the program being executable by a processor for implementing the meta imaging passive scanning method as claimed in any one of claims 1 to 4.
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| US20060146377A1 (en) * | 2003-03-07 | 2006-07-06 | Qinetiq Limited | Scanning apparatus and method |
| CN111462168A (en) * | 2020-04-22 | 2020-07-28 | 上海联影医疗科技有限公司 | Motion parameter estimation method and motion artifact correction method |
| CN113487658A (en) * | 2021-08-31 | 2021-10-08 | 清华大学 | Dynamic scene shooting method and device for scanning light field imaging system |
| CN113508417A (en) * | 2020-06-08 | 2021-10-15 | 广州超视计生物科技有限公司 | Image processing system and method |
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| US20060146377A1 (en) * | 2003-03-07 | 2006-07-06 | Qinetiq Limited | Scanning apparatus and method |
| CN111462168A (en) * | 2020-04-22 | 2020-07-28 | 上海联影医疗科技有限公司 | Motion parameter estimation method and motion artifact correction method |
| CN113508417A (en) * | 2020-06-08 | 2021-10-15 | 广州超视计生物科技有限公司 | Image processing system and method |
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