Information acquisition device, flattenable flexible scanner and information acquisition method

Abstract

The present invention provides an information acquisition device, a flattenable flexible scanner and an information acquisition method, which belong to the technical field of information acquisition devices. The device includes a calibration surface α, a first laser plane β, a second laser plane γ, and an imaging device with known internal parameters or calibrated by internal parameters. The equations of the first laser plane β and the second laser plane γ in the same spatial coordinate system are known. The intersection line between the first laser plane β and the calibration surface α is L1, and the intersection line between the second laser plane γ and the calibration surface α is L2. The equations of at least two boundary lines are known in the first laser plane β and / or the second laser plane γ, wherein the intersection points of the two boundary lines with L1 and L2 are within the area that the imaging device can capture and can be imaged; the pattern used for calibration on the calibration surface α is within the area that the imaging device can capture and can be imaged. The scanner includes the device. The method is implemented by using the scanner. It is low-priced and can adapt to a variety of scanning situations.

Description

Technical Field

[0001] The present invention relates to the technical field of information acquisition devices, and in particular to an information acquisition device, a flattenable flexible scanner and an information acquisition method. Background Art

[0002] Scanners in the prior art include high-speed scanners, flip-type scanners, and sheet-feed scanners. The flip-type scanner is essentially a linear scanning device that keeps the paper stationary while the paper moves. The sheet-feed scanner is essentially a linear scanning device that keeps the paper stationary while the paper moves. Of course, common scanners also combine the two functions. However, when scanning books, flip-type scanners will cause imprinting, and sheet-feed scanners cannot scan books. High-speed scanners are relatively expensive. Summary of the invention

[0003] In view of this, the present invention provides an information acquisition device, a flattenable flexible scanner and an information acquisition method, which are low-priced and can adapt to various scanning situations, thus being more practical.

[0004] In order to achieve the above first objective, the technical solution of the information acquisition device provided by the present invention is as follows:

[0005] The information acquisition device provided by the present invention comprises a calibration surface α, a first laser plane β, a second laser plane γ, and an imaging device with known internal parameters or after internal parameter calibration.

[0006] The equations of the first laser plane β and the second laser plane γ in the same spatial coordinate system are known.

[0007] The intersection line between the first laser plane β and the calibration surface α is L1,

[0008] The intersection line between the second laser plane γ and the calibration surface α is L2,

[0009] The equations of at least two boundary lines of the first laser plane β and / or the second laser plane γ are known, wherein:

[0010] The intersection of the two boundary lines and L1 and L2 is within the area that can be photographed by the imaging device and can be imaged;

[0011] The pattern used for calibration on the calibration surface α is within the area that can be photographed by the imaging device and can be imaged.

[0012] The information acquisition device provided by the present invention can also be further implemented by adopting the following technical solutions.

[0013] Preferably, the information acquisition device further comprises a calibration plate, and the calibration surface α is formed on the calibration plate, wherein the calibration plate is within a region that can be photographed by the imaging device and can form an image.

[0014] Preferably, on the calibration surface α, an area capable of being imaged in the imaging device has a pattern, wherein in the pattern, the relative positional relationship between at least four non-collinear points is known.

[0015] Preferably, the information acquisition device further comprises a first laser light source and a second laser light source, wherein:

[0016] The first laser plane β is formed by laser light emitted from the first laser light source, and the second laser plane γ is formed by laser light emitted from the second laser light source.

[0017] Preferably, the imaging device that has been calibrated with internal parameters is a mobile phone camera, and the method for calibrating the mobile phone camera comprises the following steps:

[0018] Determine the parameter fx=f / dx that needs to be calibrated, where f is the focal length and dx is the actual size of a pixel.

[0019] Obtain the values ​​of f and dx by searching, and calculate the value of fx=f / dx;

[0020] or,

[0021] Scan the pattern on the calibration surface α once;

[0022] The selected nth assignment fx n , perform the n-th flattening to obtain the n-th image after flattening;

[0023] If the flattened nth image does not meet the calibration requirements, the nth assignment fx is discarded. n ;

[0024] Select the n+1th assignment fx n+1 , and repeat the above steps;

[0025] Until the Nth assignment fx is selected N , perform the Nth flattening, and obtain the Nth image after flattening to meet the calibration requirements, and assign the Nth value fx N is the calibrated fx value;

[0026] Here, n is a natural number of 1≤n≤N.

[0027] In order to achieve the above second purpose, the technical solution of the flattenable flexible scanner provided by the present invention is as follows:

[0028] The flattenable flexible scanner provided by the present invention comprises a flattening module and an information acquisition device provided by the present invention.

[0029] The flattening module is used to apply a flattening algorithm to the original image acquired by the imaging device to flatten it, so as to obtain a flattened image.

[0030] The flattenable flexible scanner provided by the present invention can also be further implemented by adopting the following technical solutions.

[0031] Preferably, the flattenable flexible scanner is a high-speed scanner, and the flattenable flexible scanner further comprises a bracket.

[0032] The imaging device, the first laser light source, and the second laser light source can be temporarily fixed by the bracket.

[0033] Preferably, the stent is a flexible stent or a semi-flexible stent, wherein:

[0034] The mutual positional relationship between the first laser light source and the second laser light source is solidified to form a laser.

[0035] The positional relationship among the imaging device, the laser and the calibration plate α can be changed.

[0036] Preferably, the flattenable flexible scanner is an overhead camera, and the flattenable flexible scanner further comprises a light-transmitting plate and a light-transmitting plate support frame.

[0037] The light-transmitting plate is arranged on the light-transmitting plate supporting frame,

[0038] The bottom of the light-transmitting plate support frame has a containing space.

[0039] The calibration surface α, the first laser plane β, the second laser plane γ, and the calibrated imaging device are located in the accommodating space.

[0040] In order to achieve the third objective above, the technical solution of the information acquisition method provided by the present invention is as follows:

[0041] The information acquisition method provided by the present invention comprises the following steps:

[0042] Assembling the information acquisition device or the flattenable flexible scanner provided by the present invention;

[0043] Using the imaging device to obtain original information;

[0044] or,

[0045] Using the imaging device to obtain an original picture;

[0046] After the original image is flattened by the flattening module, a flattened image is obtained.

[0047] The information acquisition device provided by the present invention, under the condition that the internal parameters of the imaging device 7 are known or have been calibrated, uses the calibration surface α as a bridge, so that the imaging device 7 and the laser do not need to be completely solidified, and the surface morphology information of the three-dimensional object to be scanned can be obtained. In this case, the user only needs a simple imaging device and a laser light source to scan and obtain the surface morphology information of the three-dimensional object to be scanned, which is low-cost.

[0048] The information acquisition method provided by the present invention is based on the information acquisition device or the flattenable flexible scanner provided by the present invention. The information acquisition device can acquire three-dimensional information of the object to be scanned. When it is necessary to scan a picture, after acquiring the three-dimensional surface morphology information of the book page to be scanned, the three-dimensional surface morphology information is flattened by a flattening module to obtain the flattened book page to be scanned. Compared with a flip scanner and a sheet-fed scanner, it has the advantage of a wider range of adaptability. Compared with an ordinary high-definition scanner, it has the advantage of low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0050] Figure 1 A schematic diagram of the overall structure of an information acquisition device provided by an embodiment of the present invention;

[0051] Figure 2 A top view of an information acquisition device provided by an embodiment of the present invention;

[0052] Figure 3 A schematic diagram of a first laser plane and a second laser plane of an information acquisition device provided by an embodiment of the present invention;

[0053] Figure 4 A schematic diagram of the structure of a flattenable flexible scanner provided by an embodiment of the present invention when the support is a semi-flexible support;

[0054] Figure 5 A schematic diagram of the structure of the overhead camera provided by an embodiment of the present invention when scanning a book;

[0055] Figure 6 A schematic diagram of the structure of a high-speed scanner provided in an embodiment of the present invention when scanning a book. DETAILED DESCRIPTION

[0056] In view of this, the present invention provides an information acquisition device, a flattenable flexible scanner and a scanning method, which are low-priced and can adapt to a variety of scanning situations, thus being more practical.

[0057] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the information acquisition device, the flattenable flexible scanner and the scanning method proposed by the present invention, the specific implementation method, structure, features and effects thereof, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0058] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B. Specifically, it is understood that: A and B may be included at the same time, A may exist alone, or B may exist alone, and any of the above three situations may be met.

[0059] Information acquisition device embodiment

[0060] See attached Figure 1 -Attached Figure 3The information acquisition device provided by the embodiment of the present invention includes a calibration surface α, a first laser plane β, a second laser plane γ, and an imaging device 7 with known internal parameters or calibrated by internal parameters. The equations of the first laser plane β and the second laser plane γ in the same spatial coordinate system are known, the intersection line between the first laser plane β and the calibration surface α is L1, the intersection line between the second laser plane γ and the calibration surface α is L2, and the equations of at least two boundary lines of the first laser plane β and / or the second laser plane γ are known, wherein the intersection points of the two boundary lines with L1 and L2 are within the area that the imaging device 7 can capture and can be imaged; the pattern used for calibration on the calibration surface α is within the area that the imaging device 7 can capture and can be imaged. There are multiple implementation methods, the first case: the boundary line equations of the two boundaries of the first laser plane β and the second laser plane γ in the first laser plane β and the second laser plane γ are known, in this case, the four endpoints can be determined on the calibration surface α through the two boundary lines, L1 and L2 of the first laser plane β and the second laser plane γ. The second case: the boundary line equations of the two boundaries of the first laser plane β on the first laser plane β are known, the boundary line equation of one of the boundaries of the second laser plane γ on the second laser plane γ is known, and the equation of the other boundary line is unknown; the boundary line equations of the two boundaries of the second laser plane γ on the second laser plane γ are known, the boundary line equation of one of the boundaries of the first laser plane β on the second laser plane β is known, and the equation of the other boundary line is unknown; in this case, three endpoints can be determined on the calibration surface α through the two boundary lines of the first laser plane β and the second laser plane γ, L1, L2. The third case, the boundary line equations of the two boundaries of the first laser plane β on the first laser plane β are known, and the boundary line equation of the second laser plane γ is unknown; the boundary line equations of the two boundaries of the second laser plane γ on the first laser plane γ are known, and the boundary line equation of the first laser plane β is unknown; the boundary line equations of the two boundaries of the first laser plane β and the second laser plane γ are known, and the equation of the other boundary line is unknown. In this case, two endpoints can be determined on the calibration surface α through the two boundary lines of the first laser plane β and the second laser plane γ, L1, L2. Specifically, in the attached Figure 3 In the equations of the first laser plane β and the second laser plane γ in the same spatial coordinate system, in this embodiment, the calibration plane α, the first laser plane β, and the second laser plane γ are planes without boundaries. In practical applications, the first laser plane β and the second laser plane γ are usually formed by a laser light source. Therefore, in practical applications, the first laser plane β and the second laser plane γ are usually planes with boundaries. In this case, the relative positional relationship between the first laser plane β, the second laser plane γ and the calibration plane α can be established in the following ways:

[0061] First way:

[0062] The intersection line between the first laser plane β and the calibration surface α is L1, and the intersection line between the second laser plane and the calibration surface α is L2. Ideally, the first laser plane β is generated by the first laser light source O1, and the first laser plane β formed is a triangular plane O1AB, wherein the line segment AB is an area on the calibration surface α that can be photographed by the imaging device 7. In this case, after knowing the equations of the line segments O1A and O1B on the first laser plane β, the triangular plane O1AB in the first laser plane β is solidified. The intersection line between the second laser plane γ and the calibration surface α is L2, and the intersection line between the second laser plane and the calibration surface α is L2. Ideally, the second laser plane γ is generated by the second laser light source O2, and the second laser plane γ is a triangular plane O2CD, wherein the line segment CD is an area on the calibration surface α that can be photographed by the imaging device 7. In this case, after knowing the equations of the line segments O2C and O2D on the second laser plane γ, the triangular plane O1CD in the second laser plane γ is solidified. As a result, the quadrilateral ABCD is fixed, and thus the relative positional relationship between the first laser light source O1, the second laser light source O2 and the calibration surface α can be established.

[0063] Second way:

[0064] The intersection line between the first laser plane β and the calibration surface α is L1, and the intersection line between the second laser plane and the calibration surface α is L2. If three points among points A, B, C, and D fall into the area that can be photographed by the imaging device 7, and the remaining point cannot be photographed by the imaging device 7, a definite solution can be obtained when solving the relative position relationship between the first laser light source O1, the second laser light source O2, and the calibration surface α. In other words, in this case, the relative position relationship between the first laser light source O1, the second laser light source O2, and the calibration surface α can also be established without a doubt.

[0065] The third way:

[0066] The intersection line between the first laser plane β and the calibration surface α is L1, and the intersection line between the second laser plane and the calibration surface α is L2. If two points among points A, B, C, and D fall into the area that can be photographed by the imaging device 7, and the remaining two points cannot be photographed by the imaging device 7, when solving the relative position relationship between the first laser light source O1, the second laser light source O2, and the calibration surface α, the solution that can be obtained is not unique, but through selection and judgment, the solution can still be reasonably determined. That is to say, in this case, the relative position relationship between the first laser light source O1, the second laser light source O2, and the calibration surface α can also be established.

[0067] That is to say, no matter which of the first method and the second method is used, the relative position relationship between the first laser light source O1, the second laser light source O2 and the calibration surface α can be established. On this basis, the relative position relationship between the imaging device 7 and the calibration surface 3 is established, and the position relationship between the imaging device 7 and the first laser light source O1, the second laser light source O2 can be obtained by using the calibration surface 3 as an intermediate bridge. Among them, the relative position relationship between the imaging device 7 and the calibration surface 3 is established by the following method:

[0068] The imaging device 7 captures the pattern on the calibration plate, and calculates the relative position relationship between the imaging device 7 and the calibration surface 3 through at least four non-collinear points in the pattern with known relative position relationship, and through a corresponding algorithm. So far, the relative position relationship between the imaging device 7 and the first laser light source O1 and the second laser light source O2 has been established.

[0069] On this basis, when the user replaces the imaging device 7, for example, when the user scans with his own mobile phone, the internal parameters of the mobile phone need to be calibrated, where the camera internal parameters include radial distortion (K1, K2), tangential distortion (P1, P2), pixel coordinates of the center point of the imaging surface (U, V), fx and fy. The single pixel of the chip imaging is generally equal, so fx = fy, and fx = f / dx, f is the focal length, and dx is the actual size of a pixel. However, the mobile phone can be considered to ignore radial distortion and tangential distortion, and the center point of the imaging will also be the exact center. For an image of 3000×4000, the center point is 1500×2000. In the actual calibration process, the theoretical value and the calibration value of Zhang Zhengyou are basically the same. In this case, when the unknown number is only fx, it can be calculated by the focal length of the camera and the basic parameters of the chip. However, due to the large number of mobile phones, when the mobile phone cannot find or is difficult to find fx, it is necessary to calibrate the unknown number fx through the iterative assignment method. On this basis, the specific steps for calibrating the internal parameters of the mobile phone camera are as follows:

[0070] Determine the parameter fx=f / dx that needs to be calibrated, where f is the focal length and dx is the actual size of a pixel.

[0071] On this basis, the parameter fx can be obtained in two different ways:

[0072] The first method is to query the values ​​of f and dx and calculate fx = f / dx. For example, for a mobile phone camera, we can find out that its focal length is f = 4.75 mm. According to its chip information, the actual size of a pixel is 0.8 μm = 0.8 × 10 -3 mm, and we can calculate fx = 4.75 / (0.8×10 -3 )=5.9375×10 3The mobile phone camera is calibrated by using Zhang Zhengyou calibration method to obtain fx = 6.08 × 10 3 In practical applications, after the two fx values ​​are calibrated, when the mobile phone camera is used to flatten the image, the naked eye cannot distinguish between the good and the bad. Therefore, when the focal length f of the mobile phone camera and the actual size dx of a pixel are known, the parameter fx that needs to be calibrated can be easily obtained by querying the values ​​of f and dx.

[0073] However, due to the large number of mobile phone models and brands, the cameras installed on them are also complicated. If f and dx cannot be obtained through query, the parameter fx that needs to be calibrated can be obtained through the second method:

[0074] Step S1: Scan the pattern on the calibration surface α once;

[0075] Step S2: Select the nth assignment fx n , perform the n-th flattening to obtain the n-th image after flattening;

[0076] Step S3: If the flattened nth image does not meet the calibration requirements, the nth assignment fx is discarded n ; Among them, the calibration requirement refers to the fx value within the acceptable error range.

[0077] Step S4: Select the n+1th assignment fx n+1 , and repeat the above steps;

[0078] Step S5: until the Nth assignment fx is selected N , perform the Nth flattening, and obtain the Nth image after flattening to meet the calibration requirements, and assign the Nth value fx N is the calibrated fx value;

[0079] Here, n is a natural number of 1≤n≤N.

[0080] In this case, it is only necessary to scan the pattern on the calibration surface α once, and the calibrated fx value can be obtained by assigning a value to fx and iteratively back-calculating. In this case, on the calibration surface α, there is a pattern in the area that can be imaged in the imaging device 7, wherein the relative positional relationship between at least four non-collinear points in the pattern is known, and the purpose is to determine whether the mobile phone camera has flattened the pattern with a known actual size during the calibration of fx. For example, the pattern with a known actual size can be a square, and its expression can also be a checkerboard.

[0081] The information acquisition device provided by the present invention, under the condition that the internal parameters are known or the imaging device 7 has been calibrated by the internal parameters, uses the calibration surface α as a bridge, so that the imaging device 7 and the laser do not need to be completely solidified, and the surface morphology information of the three-dimensional object to be scanned can be obtained. In this case, the user only needs a simple imaging device and a laser light source to scan and obtain the surface morphology information of the three-dimensional object to be scanned, which is low in cost. In addition, the information acquisition device provided by the present invention establishes the relationship between the calibration plate, the imaging device and the laser through a picture, so it is very fast after each movement and each establishment.

[0082] The information acquisition device further comprises a calibration plate, on which the calibration surface α is formed, wherein the calibration plate is within the region that can be photographed by the imaging device 7 and can form an image. In this case, the calibration surface α can be packaged into a commodity and is easy to carry.

[0083] The information acquisition device further includes a first laser light source 5 and a second laser light source 6, wherein the first laser plane β is formed by the laser light emitted by the first laser light source 5, and the second laser plane γ is formed by the laser light emitted by the second laser light source 6. The first laser plane β and the second laser plane γ formed by the first laser light source 5 may be in a triangular or trapezoidal shape.

[0084] Flattenable flexible scanner embodiment

[0085] The flattenable flexible scanner provided by the present invention comprises the information acquisition device provided by the present invention and a flattening module, wherein the flattening module is used to apply a flattening algorithm to flatten the original image acquired by the imaging device to obtain a flattened image.

[0086] The flattenable flexible scanner provided by the present invention is based on the information acquisition device provided by the present invention, and adds a flattening module. After the three-dimensional surface morphology information of the book page to be scanned is acquired by the information acquisition device, the three-dimensional surface morphology information is flattened by the flattening module to obtain the flattened book page to be scanned. Compared with the flip scanner and the sheet-fed scanner, it has the advantage of a wider range of adaptability, and compared with the ordinary high-speed scanner, it has the advantage of low cost.

[0087] The flattenable flexible scanner is a high-speed scanner, and the flattenable flexible scanner also includes a bracket 4, and the imaging device 7, the first laser light source 5, and the second laser light source 6 can be temporarily fixed by the bracket 4. For example, the bracket 4 is a flexible bracket or a semi-flexible bracket, wherein the mutual positional relationship between the first laser light source 5 and the second laser light source 6 is solidified to form a laser, and the positional relationship between the imaging device 7, the laser, and the calibration plate α is variable. The bracket can be a flexible bracket, such as a lazy bracket. In this case, the positional relationship between the imaging device 7, the laser, and the calibration surface α is variable; the bracket can also be a semi-flexible bracket, such as Figure 4 As shown, in this case, the relative positional relationship between the laser and the calibration surface α is solidified.

[0088] Among them, Figure 5 As shown, the flattenable flexible scanner is an overhead scanner, and the flattenable flexible scanner also includes a light-transmitting plate 16 and a light-transmitting plate support frame 15. The light-transmitting plate 16 is arranged on the light-transmitting plate support frame 15. The bottom of the light-transmitting plate support frame 15 has a accommodating space 17, and the calibration surface α, the first laser plane β, the second laser plane γ, and the calibrated imaging device 7 are in the accommodating space 17. In this case, the light-transmitting plate 16 can be a glass plate. Compared with the high-angle scanner, the advantage is that the overhead scanner turns the book pages to be scanned upside down on the light-transmitting plate 16 during use, and there is no need to press the book pages to be scanned manually, so there is no need to eliminate the pressing fingerprints of the hands. In addition, since the use environment of the overhead scanner is more closed and the lighting effect is better, the scanning effect is also better.

[0089] Scanning method embodiment

[0090] See attached Figure 5 and attached Figure 6 The scanning method provided by the present invention comprises the following steps:

[0091] Step S1: assembling the information acquisition device or the flattenable flexible scanner provided by the present invention;

[0092] Step S2: using the imaging device 7 to obtain original information;

[0093] or,

[0094] Step S2: using the imaging device 7 to obtain the original image;

[0095] Step S3: The original information is flattened by the flattening module to obtain a flattened image.

[0096] The information acquisition method provided by the present invention is based on the information acquisition device or the flattenable flexible scanner provided by the present invention. The information acquisition device can acquire three-dimensional information of the object to be scanned. When it is necessary to scan a picture, after acquiring the three-dimensional surface morphology information of the book page to be scanned, the three-dimensional surface morphology information is flattened by a flattening module to obtain the flattened book page to be scanned. Compared with a flip scanner and a sheet-fed scanner, it has the advantage of a wider range of adaptability. Compared with an ordinary high-definition scanner, it has the advantage of low cost.

[0097] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0098] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An information acquisition device, characterized in that: The imaging device (7) comprises a calibration surface α, a first laser plane β, a second laser plane γ, and an internal parameter known or calibrated. The equations of the first laser plane β and the second laser plane γ in the same spatial coordinate system are known. The intersection line between the first laser plane β and the calibration surface α is L1, The intersection line between the second laser plane γ and the calibration surface α is L2, The equations of the two boundary lines on the first laser plane β and the second laser plane γ are known respectively, where: The intersection of the two boundary lines and L1, L2 is within the area that can be photographed by the imaging device (7) and can be imaged; The pattern used for calibration on the calibration surface α is within the area that can be photographed by the imaging device (7) and can be imaged; On the calibration surface α, an area capable of being imaged in the imaging device (7) has a pattern, wherein the relative positional relationship between at least four non-collinear points in the pattern is known; It also includes a calibration plate, the calibration surface α is formed on the calibration plate, wherein the calibration plate is located in an area that can be photographed by the imaging device (7) and can form an image.

2. The information acquisition device according to claim 1, characterized in that: It also includes a first laser light source (5) and a second laser light source (6), wherein: The first laser plane β is formed by laser light emitted by the first laser light source (5), and the second laser plane γ is formed by laser light emitted by the second laser light source (6).

3. The information acquisition device according to claim 1, characterized in that: The imaging device (7) that has undergone internal parameter calibration is a mobile phone camera, and the method for calibrating the mobile phone camera comprises the following steps: Determine the parameter fx=f / dx that needs to be calibrated, where f is the focal length and dx is the actual size of a pixel. By searching for the values ​​of f and dx, we can calculate the value of fx=f / dx.

4. A flattenable flexible scanner, characterized in that: comprising a flattening module and the information acquisition device according to any one of claims 1 to 3, The flattening module is used to apply a flattening algorithm to the original image acquired by the imaging device (7) to flatten the image, thereby obtaining a flattened image.

5. The flattenable flexible scanner according to claim 4, characterized in that: The flattenable flexible scanner is a high-speed scanner, and the flattenable flexible scanner further comprises a bracket (4). The imaging device (7), the first laser light source (5) and the second laser light source (6) can be temporarily fixed by means of the bracket (4).

6. The flattenable flexible scanner according to claim 5, characterized in that: The support (4) is a flexible support or a semi-flexible support, wherein: The mutual positional relationship between the first laser light source (5) and the second laser light source (6) is solidified to form a laser. The positional relationship between the imaging device (7), the laser, and the calibration plate α is variable.

7. The flattenable flexible scanner according to claim 4, characterized in that: The flattenable flexible scanner is an overhead camera, and the flattenable flexible scanner further comprises a light-transmitting plate (16), a light-transmitting plate support frame (15), The light-transmitting plate (16) is arranged on the light-transmitting plate supporting frame (15), The bottom of the light-transmitting plate support frame (15) has a receiving space (17). The calibration surface α, the first laser plane β, the second laser plane γ, and the calibrated imaging device (7) are located in the accommodating space (17).

8. An information acquisition method, characterized in that: The following steps are involved: Assembling the flattenable flexible scanner described in any one of claims 4 to 7; Using the imaging device (7) to obtain original information; After the original information is flattened by the flattening module, a flattened image is obtained.

Images