CN117969546A

CN117969546A - Imaging method and device of film material, electronic equipment and storage medium

Info

Publication number: CN117969546A
Application number: CN202410129147.4A
Authority: CN
Inventors: 卢靖; 李宝同
Original assignee: Suzhou Luster Vision Intelligent Device Co Ltd
Current assignee: Suzhou Luster Vision Intelligent Device Co Ltd
Priority date: 2024-01-30
Filing date: 2024-01-30
Publication date: 2024-05-03

Abstract

The invention discloses an imaging method, device and equipment for film materials and a storage medium. The method comprises the following steps: acquiring motion information of a production line, and determining an image acquisition signal according to the motion information through coding equipment; acquiring the image acquisition signal through a light source control device, and generating a light source control signal according to the image acquisition signal so as to control the lighting mode of a light source at each exposure moment of the micro-distance imaging device according to the light source control signal; and the image acquisition equipment is used for controlling the micro-distance imaging equipment to scan the film material to be detected in a lighting mode matched with each exposure time according to the image acquisition signals, so as to generate a film material image. The technical scheme solves the problem that high dynamic imaging of the membrane material is difficult to realize in a limited detection distance range, can obviously shorten the detection distance through macro imaging and a stroboscopic light source, realizes high dynamic imaging of the membrane material, and is beneficial to improving the defect detection effect of the membrane material.

Description

Imaging method and device of film material, electronic equipment and storage medium

Technical Field

The present invention relates to the field of machine vision, and in particular, to a method and apparatus for imaging a film material, an electronic device, and a storage medium.

Background

At present, detection equipment for membrane materials such as lithium ion battery diaphragms is usually a backlight detection station. Fig. 1A is a schematic structural diagram of a backlight detection station in the prior art, as shown in fig. 1A, a line scanning black-and-white camera is generally adopted as a camera in the backlight detection station, and a strip light source or a line light source is generally adopted as a light source. The light source is parallel to the film surface and the distance from the light source to the film surface is less than 100mm, the included angle between the camera and the normal line of the film surface is in the range of 0-5 degrees, and the detection distance of the camera, namely the distance from the flange surface of the camera to the film surface, is related to the focal length of the lens and is usually required to be ensured to be 400-1500 mm.

However, the space of the existing diaphragm dividing and cutting machine or winding machine is very narrow, and it is difficult to ensure a detection distance of 400mm or more. In addition, in order to distinguish between defects of different film materials, such as bright spots, missing coating, pinholes, etc., it is generally necessary to perform high dynamic detection on the film materials, and how to implement high dynamic imaging of the film materials within a limited detection distance range is a problem to be solved.

Disclosure of Invention

The invention provides an imaging method, device, equipment and storage medium for film materials, which are used for solving the problem that high dynamic imaging of the film materials is difficult to realize in a limited detection distance range, and the detection distance can be obviously shortened through micro-distance imaging and a stroboscopic light source, so that the high dynamic imaging of the film materials is realized, and the defect detection effect of the film materials is improved.

According to an aspect of the present invention, there is provided an imaging method of a film-like material, the method being performed by a high dynamic imaging system including a macro imaging device, a light source control device, an image acquisition device, and an encoding device; the method comprises the following steps:

acquiring motion information of a production line, and determining an image acquisition signal according to the motion information through coding equipment;

Acquiring the image acquisition signal through a light source control device, and generating a light source control signal according to the image acquisition signal so as to control the lighting mode of a light source at each exposure moment of the micro-distance imaging device according to the light source control signal;

And the image acquisition equipment is used for controlling the micro-distance imaging equipment to scan the film material to be detected in a lighting mode matched with each exposure time according to the image acquisition signals, so as to generate a film material image.

According to another aspect of the present invention, there is provided an imaging apparatus of a film-like material, the apparatus being configured in a high dynamic imaging system including a macro imaging device, a light source control device, an image acquisition device, and an encoding device; the device comprises:

The acquisition signal determining module is used for acquiring the motion information of the production line and determining an image acquisition signal according to the motion information through the encoding equipment;

the lighting mode control module is used for acquiring the image acquisition signal through the light source control equipment and generating a light source control signal according to the image acquisition signal so as to control the lighting mode of the light source at each exposure moment of the micro-distance imaging equipment according to the light source control signal;

The film material image generation module is used for controlling the micro-distance imaging device to scan the film material to be detected in a lighting mode matched with each exposure time through the image acquisition device according to the image acquisition signals to generate a film material image.

According to another aspect of the present invention, there is provided an electronic apparatus including:

At least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of imaging a film-like material according to any one of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute the method for imaging a film-like material according to any one of the embodiments of the present invention.

According to the technical scheme, the image acquisition signal is determined by acquiring the motion information of the production line and by the encoding equipment according to the motion information; then the image acquisition signal is acquired through a light source control device, and a light source control signal is generated according to the image acquisition signal, so that the lighting mode of a light source at each exposure moment of the micro-distance imaging device is controlled according to the light source control signal; and finally, controlling the micro-distance imaging equipment to scan the film material to be detected in a lighting mode matched with each exposure time by the image acquisition equipment according to the image acquisition signals to generate a film material image. The technical scheme solves the problem that high dynamic imaging of the membrane material is difficult to realize in a limited detection distance range, can obviously shorten the detection distance through macro imaging and a stroboscopic light source, realizes high dynamic imaging of the membrane material, and is beneficial to improving the defect detection effect of the membrane material.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1A is a schematic diagram of a backlight inspection station according to the prior art;

FIG. 1B is a flowchart of a method for imaging a film-like material according to a first embodiment of the present invention;

FIG. 2A is a flow chart of a method for imaging a film-like material according to a second embodiment of the present invention;

fig. 2B is a schematic structural diagram of a high dynamic imaging system according to a second embodiment of the present invention;

FIG. 2C is a diagram illustrating image quality comparison according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of an imaging device made of a film material according to a third embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device implementing an imaging method of a film-like material according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The technical scheme of the application obtains, stores, uses, processes and the like the data, which all meet the relevant regulations of national laws and regulations.

Example 1

Fig. 1B is a flowchart of an imaging method for a membrane material according to an embodiment of the present invention, where the embodiment is applicable to a detection scenario for a membrane material such as a battery separator, and especially a high dynamic detection scenario for a membrane material. The method may be performed by an imaging device of the film-like material, which may be implemented in hardware and/or software, which may be configured in an electronic device. As shown in fig. 1B, the method includes:

s110, acquiring motion information of a production line, and determining an image acquisition signal according to the motion information through an encoding device.

The present solution may be performed by a high dynamic imaging system, which may include a macro imaging device, a light source control device, an image acquisition device, and an encoding device. The micro-distance imaging equipment can be a micro-distance camera, and photoelectric conversion devices in the micro-distance camera can be arranged linearly so as to match with the built-in lens array to scan the film materials to be detected line by line to generate film material images. The photoelectric conversion Device may be a CCD (Charge-Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor ). The micro-distance imaging device can obviously shorten the imaging distance, can generally reduce the imaging distance to below 30mm, and is beneficial to realizing imaging of the film materials in a limited detection distance range.

The light source can be a linear light source or a strip light source, the lighting mode of the light source can be matched with the exposure time of the micro-distance imaging equipment, and high dynamic imaging is realized through multi-mode time-sharing exposure. The light source control device can be used for controlling the light source to perform polishing according to a polishing mode of matching the exposure time of the micro-distance imaging device. The image acquisition equipment can be used for controlling the macro imaging equipment to carry out exposure imaging and acquiring a film material image generated by the macro imaging equipment.

It will be appreciated that in order to increase the production efficiency of the product, the production, detection, assembly, etc. of the film material is usually an integrated process, which is performed by the same production line. The high dynamic imaging system can acquire the motion information of the production line, and the image acquisition signals are determined according to the motion information of the production line through the encoding equipment. In particular, the motion information may be a production line motion signal, and the encoding device may convert the production line motion signal into an image acquisition signal. The encoding device may be an encoder, and the encoder may be an incremental encoder or an absolute encoder. The light source control device and the image acquisition device can respectively control the light source and the micro-distance imaging device according to the image acquisition signals so as to scan the film material to be detected and generate a high-dynamic film material image.

S120, acquiring the image acquisition signal through a light source control device, and generating a light source control signal according to the image acquisition signal so as to control the lighting mode of the light source at each exposure moment of the micro-distance imaging device according to the light source control signal.

It is easy to understand that the light source control device may be connected to the encoding device to acquire the image acquisition signal generated by the encoding device. The image acquisition signal can represent the snapshot time of the micro-distance imaging equipment to the film material to be detected. According to the image acquisition signals, the light source control equipment can determine the lighting mode of the light source at each exposure time of the micro-distance imaging equipment, and further generate light source control signals according to the lighting mode of the light source at each exposure time of the micro-distance imaging equipment. Specifically, the lighting mode may be set based on the lighting frequency of the light source, or may be determined according to the lighting time of each point light source in the light source. The light source control device can control the lighting mode of the light source at each exposure time of the micro-distance imaging device according to the light source control signal.

S130, controlling the micro-distance imaging equipment to scan the film material to be detected in a lighting mode matched with each exposure time by the image acquisition equipment according to the image acquisition signals, and generating a film material image.

The image acquisition device can be connected with the light source control device or the coding device and receives the image acquisition signal sent by the light source control device or the coding device. According to the image acquisition signals, the image acquisition equipment can determine the exposure time of the micro-distance imaging equipment and control the micro-distance imaging equipment to scan the film material to be detected in a lighting mode corresponding to each exposure time so as to realize high dynamic imaging and generate a film material image.

Example two

Fig. 2A is a flowchart of an imaging method of a film material according to a second embodiment of the present invention, where the embodiment is refined based on the foregoing embodiment. As shown in fig. 2A, the method includes:

s210, acquiring motion information of a production line, and determining an image acquisition signal according to the motion information through an encoding device.

Fig. 2B is a schematic structural diagram of a high dynamic imaging system according to a second embodiment of the present invention. In this scheme, as shown in fig. 2B, the high dynamic imaging system further includes an image processing device in addition to the macro imaging device, the light source control device, the image acquisition device, and the encoding device. The image processing device can perform image processing operations such as defect detection, defect identification, defect segmentation and the like on the film material image after the film material image is obtained.

S220, acquiring the image acquisition signal through a light source control device, and generating a light source control signal according to the image acquisition signal so as to control the lighting mode of the light source at each exposure moment of the micro-distance imaging device according to the light source control signal.

In this scheme, optionally, the light source is a linear light source or a strip light source; the macro imaging apparatus includes a linear arrangement of photoelectric conversion devices.

In one possible solution, the macro imaging apparatus is a time-division exposure macro imaging apparatus.

The micro-distance imaging device with time-sharing exposure can perform frequency multiplication on the image acquisition signal for more than two times after receiving the image acquisition signal, so that the micro-distance imaging device can acquire more than two mode field images at the same time, and the integration time of each mode field can be inconsistent. Each frequency multiplication corresponds to a mode field. For example, in a scene where the image acquisition signal is double frequency, there are two mode fields, namely mode field 1 and mode field 2, and the integration time of mode field 1 can be set lower, which is a dark field image; the integration time of the mode field 2 can be set higher as a bright field image. High dynamic range imaging can be achieved by time-sharing exposure techniques.

S230, controlling the micro-distance imaging device to scan the film material to be detected in a lighting mode matched with each exposure time by the image acquisition device according to the image acquisition signals, and generating a film material image.

Based on the scheme, the film material image is a high dynamic range image. The high dynamic range image (HIGH DYNAMIC RANGE IMAGING, HDRI) may achieve a larger exposure dynamic range, i.e., a larger light-dark distinction, than the Low dynamic range image (Low DYNAMIC RANGE IMAGING, LDRI). Therefore, the imaging quality of the high dynamic range image is higher, and accurate defect detection is easier to realize on the basis of the high dynamic range image.

S240, acquiring the film material image through image processing equipment, and determining a defect detection result of the film material according to the film material image.

It will be appreciated that the image capture device may comprise an image capture card and that after the macro imaging device generates the film-like material image, the image capture device may save the film-like material image to the image capture card. The image processing device can be connected with the image acquisition device, acquires the film material image which is not subjected to defect detection in the image acquisition card, and performs defect detection on the film material image to obtain a defect detection result of the film material image matching.

In a preferred embodiment, the determining the defect detection result of the film material according to the film material image includes:

Determining a defect detection result of the film material based on a pre-constructed defect detection model according to the film material image; the defect detection result comprises defect quantity, defect type and defect position.

It can be understood that the defect detection model may be a visual processing model for defect detection, which is constructed based on a target detection algorithm, for example, a defect detection model constructed based on a one-stage target detection algorithm such as YOLO, SSD, etc., and a defect detection model constructed based on a two-stage target detection algorithm such as fast R-CNN, etc. The film material image can be used as input of the defect detection model, the defect detection model can perform feature extraction on the film material image, position the defect position in the film material image according to the image features of the film material image, judge the defect type of each defect, and count the defect number in the film material image.

On the basis of the scheme, the defect types comprise tearing, pinholes, bright spots and missing coatings.

Fig. 2C is a schematic diagram of image quality comparison according to a second embodiment of the present invention, wherein the upper row of images in fig. 2C are respectively low dynamic range images of tearing, pinholes, bright spots and missing defects, and the lower row of images are respectively high dynamic range images of tearing, pinholes, bright spots and missing defects. By comparing the upper and lower images of fig. 2C, it can be obviously observed that the high dynamic range image has a larger light-shade difference, which is beneficial to providing more abundant defect characteristic information for the defect detection model.

In the scheme, because the high dynamic range image has larger light and shade difference, the image processing equipment can more easily realize accurate defect detection of the film material, ensure accurate identification of the defect type and effectively avoid missing detection and false detection of the defect of the film material.

Example III

Fig. 3 is a schematic structural diagram of an imaging device made of a film material according to a third embodiment of the present invention. The device is configured in a high-dynamic imaging system, and the high-dynamic imaging system comprises a macro imaging device, a light source control device, an image acquisition device and a coding device. As shown in fig. 3, the apparatus includes:

The acquisition signal determining module 310 is configured to acquire motion information of a production line, and determine an image acquisition signal according to the motion information through an encoding device;

The lighting mode control module 320 is configured to obtain the image acquisition signal through a light source control device, and generate a light source control signal according to the image acquisition signal, so as to control a lighting mode of a light source at each exposure time of the macro imaging device according to the light source control signal;

the film material image generating module 330 is configured to control the macro imaging device to scan the film material to be detected in a polishing mode matched with each exposure time according to the image acquisition signal by using the image acquisition device, so as to generate a film material image.

Optionally, the film material image is a high dynamic range image.

In a preferred aspect, the high dynamic imaging system further comprises an image processing device;

The apparatus further comprises:

and the defect detection module is used for acquiring the film material image through the image processing equipment after the film material image is generated, and determining a defect detection result of the film material according to the film material image.

On the basis of the scheme, optionally, the defect detection module is specifically configured to determine a defect detection result of the film material based on a pre-constructed defect detection model according to the film material image; the defect detection result comprises defect quantity, defect type and defect position.

In this embodiment, optionally, the defect types include tearing, pinholes, bright spots, and missing coatings.

The imaging device of the film material provided by the embodiment of the invention can execute the imaging method of the film material provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

Example IV

Fig. 4 shows a schematic diagram of an electronic device 410 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 4, the electronic device 410 includes at least one processor 411, and a memory, such as a Read Only Memory (ROM) 412, a Random Access Memory (RAM) 413, etc., communicatively connected to the at least one processor 411, wherein the memory stores computer programs executable by the at least one processor, and the processor 411 may perform various suitable actions and processes according to the computer programs stored in the Read Only Memory (ROM) 412 or the computer programs loaded from the storage unit 418 into the Random Access Memory (RAM) 413. In the RAM 413, various programs and data required for the operation of the electronic device 410 may also be stored. The processor 411, the ROM 412, and the RAM 413 are connected to each other through a bus 414. An input/output (I/O) interface 415 is also connected to bus 414.

Various components in the electronic device 410 are connected to the I/O interface 415, including: an input unit 416 such as a keyboard, a mouse, etc.; an output unit 417 such as various types of displays, speakers, and the like; a storage unit 418, such as a magnetic disk, optical disk, or the like; and a communication unit 419 such as a network card, modem, wireless communication transceiver, etc. The communication unit 419 allows the electronic device 410 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.

The processor 411 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 411 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 411 performs the various methods and processes described above, such as imaging methods of film-like materials.

In some embodiments, the method of imaging a film-like material may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as storage unit 418. In some embodiments, some or all of the computer program may be loaded and/or installed onto the electronic device 410 via the ROM 412 and/or the communication unit 419. When the computer program is loaded into RAM 413 and executed by processor 411, one or more steps of the imaging method of a film-like material described above may be performed. Alternatively, in other embodiments, the processor 411 may be configured to perform imaging methods of the film-like material in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable film type material imaging device, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. An imaging method of a film material is characterized in that the method is executed by a high-dynamic imaging system, and the high-dynamic imaging system comprises a macro imaging device, a light source control device, an image acquisition device and a coding device; the method comprises the following steps:

2. The method of claim 1, wherein the light source is a linear light source or a bar-shaped light source; the macro imaging apparatus includes a linear arrangement of photoelectric conversion devices.

3. The method of claim 1, wherein the macro imaging device is a time-division exposure macro imaging device.

4. The method of claim 1, wherein the film-like material image is a high dynamic range image.

5. The method of claim 1, wherein the high dynamic imaging system further comprises an image processing device;

After generating the film-like material image, the method further comprises:

And acquiring the film material image through image processing equipment, and determining a defect detection result of the film material according to the film material image.

6. The method of claim 5, wherein determining a defect detection result for the film-like material based on the film-like material image comprises:

7. The method of claim 6, wherein the defect types include tears, pinholes, bright spots, and flood coat.

8. The imaging device of the film material is characterized by being configured in a high-dynamic imaging system, wherein the high-dynamic imaging system comprises a macro imaging device, a light source control device, an image acquisition device and a coding device; comprising the following steps:

9. An electronic device, the electronic device comprising:

At least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of imaging a film-like material of any one of claims 1-7.

10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of imaging a film-like material according to any one of claims 1-7.