Micro image-text manufacturing method and dynamic amplification film

Abstract

The invention relates to the technical field of anti-counterfeiting, and particularly discloses a micro image-text manufacturing method and a dynamic amplification film. The method comprises the following steps: acquiring parameters of a micro lens, wherein the parameters of the micro lens comprise focal length, period and refractive index; presetting a stereoscopic image effect, and setting a highest depth of field and a lowest depth of field; performing three-dimensional modeling according to the preset three-dimensional image effect to form a three-dimensional image model; determining the period of each point on the stereo image model according to the micro-lens parameters and depth-of-field data of the stereo image model, wherein the depth-of-field data comprises the highest depth-of-field, the lowest depth-of-field and the depth-of-field of each point on the stereo image model; and obtaining a target micro image-text according to the period of each point on the three-dimensional image model. According to the method, the micro image-text meeting various stereoscopic display requirements can be manufactured, so that diversified stereoscopic display effects are obtained, and the manufacturing process is relatively simple.

Description

Technical Field

[0001] The present application relates to the field of anti-counterfeiting technology, and in particular to a method for producing micro-images and texts and a dynamic amplification film. Background Art

[0002] There are two main effects of lens array magnification at present: one is micro-image magnification, which has depth of field and motion effects; the other is single image magnification, which has depth of field dynamic or three-dimensional effects. Among them, micro-images are made by making unit graphic arrays, and single images are calculated by integrated imaging principles.

[0003] Generally, in order to form a single-image stereogram, it is often necessary to model in 3D software to form a stereo model. In order to present a stereo image formed by an array pattern, 3D modeling is also required, and the array pattern is deformed and simulated to conform to the visual effect of the stereo model, but the mapping process is relatively complicated. Summary of the invention

[0004] Based on this, it is necessary to provide a method for producing micro-images and texts and a dynamic amplification film to address the above problems.

[0005] According to a first aspect of an embodiment of the present application, a method for producing a micro-image is provided, comprising:

[0006] Acquiring microlens parameters, wherein the microlens parameters include focal length, arrangement period, and refractive index;

[0007] Preset stereoscopic image effects and set the maximum and minimum depth of field;

[0008] Performing three-dimensional modeling according to the preset three-dimensional image effect to form a three-dimensional image model;

[0009] Determine the period of each point on the stereoscopic image model according to the microlens parameters and the depth data of the stereoscopic image model, wherein the depth data includes the highest depth, the lowest depth and the depth of each point on the stereoscopic image model;

[0010] According to the period of each point on the three-dimensional image model, the preset micro-image is deformed to obtain the target micro-image

[0011] In one embodiment, the step of determining the period of each point on the stereoscopic image model comprises:

[0012] According to the preset stereo image effect, the highest depth of field and the lowest depth of field, the minimum period difference and the maximum period difference are calibrated;

[0013] According to the minimum period difference and the maximum period difference, a mapping relationship between the period difference of each point on the stereoscopic image model and the depth of field is established to determine the period difference of each point on the stereoscopic image model;

[0014] The period of each point on the stereoscopic image model is determined according to the period of the microlens, the minimum period difference and the period difference of each point on the stereoscopic image model.

[0015] In one embodiment, the step of calibrating the minimum period difference and the maximum period difference according to the preset stereoscopic image effect, the highest depth of field and the lowest depth of field comprises:

[0016] When the preset stereoscopic image effect is a floating effect, the lowest point of the stereoscopic image model is above the zero plane, the minimum period difference is calibrated according to the highest depth of field, and the maximum period difference is calibrated according to the lowest depth of field.

[0017] Calibrate using the following formula:

[0018]

[0019]

[0020] Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 is the arrangement period of the microlenses.

[0021] In one embodiment, when the preset stereoscopic image effect is a floating effect, the mapping relationship is:

[0022] O x =O min +(O max -O min )×(D max -D x ) / (D max -D min )

[0023] Among them, O x represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereoscopic image model, D max Denotes the maximum depth of field, D min represents the minimum depth of field, O max represents the maximum period difference, O min represents the minimum period difference.

[0024] In one embodiment, when the preset stereoscopic image effect is a floating effect, the period of each point on the stereoscopic image model is determined by the following formula:

[0025] T x =T1+O x

[0026] Among them, T x represents the period of each point on the stereoscopic image model, O x represents the period difference of each point on the stereoscopic image model, and T1 is the arrangement period of the microlenses.

[0027] In one embodiment, the step of calibrating the minimum period difference and the maximum period difference according to the preset stereoscopic image effect, the highest depth of field and the lowest depth of field comprises:

[0028] When the preset stereoscopic image effect is a sinking effect, the highest point of the stereoscopic image model is below the zero plane, the minimum period difference is calibrated according to the lowest depth of field, and the maximum period difference is calibrated according to the highest depth of field,

[0029] Calibrate using the following formula:

[0030]

[0031]

[0032] Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 is the arrangement period of the microlenses.

[0033] In one embodiment, when the preset stereoscopic image effect is a sinking effect, the mapping relationship is:

[0034] O x =O max -(O max -O min )×(D min -D x ) / (D max -D min )

[0035] Among them, O x represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereoscopic image model, D max Denotes the maximum depth of field, D min represents the minimum depth of field, O max represents the maximum period difference, O minrepresents the minimum period difference.

[0036] In one of the embodiments, when the preset stereoscopic image effect is a sinking effect, the period of each point on the stereoscopic image model is determined by the following formula:

[0037] T x =T1-O x

[0038] Among them, T x represents the period of each point on the stereoscopic image model, O x represents the period difference of each point on the stereoscopic image model, and T1 is the arrangement period of the microlenses.

[0039] In one embodiment, the stereoscopic image model at least includes a hemispherical model, a spherical model, and a wavy surface model.

[0040] According to a second aspect of an embodiment of the present application, a dynamic amplification film is provided, comprising a substrate, micro-images formed on one side of the substrate, and a micro-lens array formed on the other side of the substrate, wherein each micro-lens in the micro-lens array corresponds to each micro-image; and the arrangement period of the micro-lenses is different from the arrangement period of the micro-image;

[0041] Wherein, the micro-image and text are the target micro-image and text produced by the above-mentioned micro-image and text production method.

[0042] In one embodiment, the micro-image is a concave-convex structure along a cross section perpendicular to the surface of the substrate, and the concave-convex structure is filled with ink.

[0043] In one embodiment, a reflective layer is disposed on a side of the microlens array away from the micro-images.

[0044] In one embodiment, the distance between the micro-image and the micro-lens array is within the focal length range of the micro-lens.

[0045] The method for producing micro-images provided in the embodiment of the present application can calculate the period of each point on the stereoscopic image model according to the relevant parameters of the constructed stereoscopic image model. Since each point on the stereoscopic image model corresponds to each point on the micro-image, it is equivalent to determining the period of each point on the micro-image, and then obtaining the target micro-image. The image effect presented by the cooperation between the target micro-image obtained in the above manner and the microlens array is the preset stereoscopic image effect. In this way, micro-images that meet various stereoscopic display requirements can be produced, thereby obtaining a variety of stereoscopic display effects, and the production process is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A flowchart of a method for producing micro-graphics provided in an embodiment of the present application;

[0047] Figure 2 This is a flowchart of step S400 in an embodiment of the present application;

[0048] Figure 3(a)-Figure 3(d) It is a schematic diagram of an embodiment of the present application.

[0049] Figure 4(a)-Figure 4(b) This is a schematic diagram of another embodiment of the present application.

[0050] Figure 5 This is a schematic diagram of the structure of the dynamic amplification film of the present application. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to understand the disclosure of the present invention more thoroughly and comprehensively.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0055] In one embodiment, a method for producing micro-images is provided. The method for producing micro-images provided in this embodiment can be used to produce micro-images, and the micro-images can be matched with a microlens array to enable the human eye to observe the display effect of a three-dimensional image. Specifically, a micro-image can be formed on one side of a substrate, and a microlens array can be set on the other side of the substrate. The micro-images correspond to the microlenses one by one, and a three-dimensional image can be presented by using the magnification imaging principle of the microlens array, which can be applied to anti-counterfeiting technology on packaging.

[0056] Reference Figure 1 The method for making micro-text provided in this embodiment includes the following steps:

[0057] Step S100: Acquire microlens parameters, where the microlens parameters include focal length, arrangement period, and refractive index.

[0058] Step S200: preset a stereoscopic image effect and set a maximum depth of field and a minimum depth of field.

[0059] Specifically, the stereoscopic image effect to be presented can be predetermined according to the display requirements, and the preset stereoscopic image effect can be an imaging effect of any curved surface, such as a hemispherical imaging effect, a spherical imaging effect, a wavy curved surface imaging effect, etc. Then, the maximum depth of field and the minimum depth of field are set according to the preset stereoscopic image effect, and the maximum depth of field and the minimum depth of field can be used in the subsequent calculation of the period of each point on the micro-image.

[0060] Step S300: Perform three-dimensional modeling according to a preset three-dimensional image effect to form a three-dimensional image model.

[0061] After the preset stereoscopic image effect is determined, stereoscopic modeling can be performed accordingly to form a stereoscopic image model. Subsequently, the period of each point on the micro-image array can be determined by determining the period of each point on the stereoscopic image model to obtain the target micro-image that can present the preset stereoscopic image effect. For example, if the preset stereoscopic image effect is a hemispherical imaging effect, the stereoscopic image model can be a hemispherical model; if the preset stereoscopic image effect is a spherical imaging effect, the stereoscopic image model can be a spherical model. In this embodiment, the stereoscopic image model includes at least a hemispherical model, a spherical model, and a wavy surface model. In addition, the model on one side of the zero plane does not have different depths of field with the same projection position.

[0062] Step S400: determining the period of each point on the stereoscopic image model according to microlens parameters and depth data of the stereoscopic image model, wherein the depth data includes the highest depth, the lowest depth and the depth of each point on the stereoscopic image model.

[0063] When the stereoscopic image model is determined and the highest depth of field, the lowest depth of field, the depth of field of each point of the stereoscopic image model and the microlens parameters are known, the period of each point on the stereoscopic image model can be calculated according to the above parameters.

[0064] Step S500: Obtain target micro-images and texts according to the period of each point on the stereoscopic image model.

[0065] Since the points on the three-dimensional image model correspond to the points on the array-type graphics, after obtaining the period of each point on the three-dimensional image model, the period of each point on the corresponding array-type graphics can be determined, and then the target micro-graphics can be obtained. The period of each point on the target micro-graphics corresponds to the period of each point on the three-dimensional image model.

[0066] The method for producing micro-images provided in the embodiment of the present application can calculate the period of each point on the stereoscopic image model according to the relevant parameters of the constructed stereoscopic image model. Since each point on the stereoscopic image model corresponds to each point on the micro-image, it is equivalent to determining the period of each point on the micro-image, and then obtaining the target micro-image. The image effect presented by the cooperation between the target micro-image obtained in the above manner and the microlens array is the preset stereoscopic image effect. In this way, micro-images that meet various stereoscopic display requirements can be produced, thereby obtaining a variety of stereoscopic display effects, and the production process is relatively simple.

[0067] In one embodiment, referring to Figure 2 Step S400, i.e., the step of determining the period of each point on the stereoscopic image model, comprises:

[0068] Step S410: calibrate the minimum period difference and the maximum period difference according to the preset stereoscopic image effect, the highest depth of field and the lowest depth of field.

[0069] Step S430: Establish a mapping relationship between the period difference of each point on the stereoscopic image model and the depth of field according to the minimum period difference and the maximum period difference, so as to determine the period difference of each point on the stereoscopic image model.

[0070] Step S450: Determine the period of each point on the stereoscopic image model according to the period of the microlens, the minimum period difference and the period difference of each point on the stereoscopic image model.

[0071] When the highest depth of field, the lowest depth of field and the depth of field of each point on the stereoscopic image model are known, but the period of each point on the stereoscopic image model is unknown, the relationship between the period difference of each point on the stereoscopic image model and the depth of field can be constructed. After obtaining the relationship between the two, the period difference of each point on the stereoscopic image model can be determined according to the known depth of field, and then the period of each point on the stereoscopic image model can be calculated in combination with the period of the microlens and the minimum period difference.

[0072] Specifically, the preset stereoscopic image effect may include a floating effect and a sinking effect. The minimum period difference and the maximum period difference may be first calibrated according to the preset stereoscopic image effect and the known maximum depth of field and minimum depth of field. Different calibration methods may be selected for different preset stereoscopic image effects. Then, a mapping relationship between the period difference and the depth of field of each point on the stereoscopic image model may be established according to the calibrated minimum period difference and maximum period difference.

[0073] It should be noted that if the lowest point and the highest point of the stereoscopic image model are located on both sides of the zero plane, that is, it has both floating effect and sinking effect, then the zero plane can be used as the boundary to divide the stereoscopic image model into two sub-stereoscopic image models, and then the periods of each point on the two sub-stereoscopic image models can be calculated separately by combining the above method, and finally the periods of each point on the stereoscopic image model can be integrated.

[0074] In step S410, when the preset stereo image effect is a floating effect, the lowest point of the stereo image model is above the zero plane, and the minimum period difference can be calibrated according to the highest depth of field, and the maximum period difference can be calibrated according to the lowest depth of field, that is, the position in the highest depth of field corresponds to the minimum period difference, and the position in the lowest depth of field corresponds to the maximum period difference. When the preset stereo image effect is a sinking effect, the highest point of the stereo image model is below the zero plane, and the minimum period difference can be calibrated according to the lowest depth of field, and the maximum period difference can be calibrated according to the highest depth of field, that is, the position in the lowest depth of field corresponds to the minimum period difference, and the position in the highest depth of field corresponds to the maximum period difference.

[0075] In one embodiment, when the preset stereoscopic image effect is a floating effect, it can be calibrated by the following formula:

[0076]

[0077]

[0078] Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 represents the period of the microlens array.

[0079] In one embodiment, when the preset stereoscopic image effect is a sinking effect, it can be calibrated by the following formula:

[0080]

[0081]

[0082] Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 represents the period of the microlens array.

[0083] In step S430, when the preset stereoscopic image effect is a floating effect, the mapping relationship may be:

[0084] O x =O min +(O max -O min )×(D max -D x ) / (D max -D min )

[0085] Among them, O x Represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereo image model, D max Indicates the maximum depth of field, D min Indicates the minimum depth of field, O max Indicates the maximum period difference, O min Indicates the minimum period difference.

[0086] When the preset stereoscopic image effect is a sinking effect, the mapping relationship can be:

[0087] O x =O max -(O max -O min )×(D min -D x ) / (D max -D min )

[0088] Among them, O x Represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereo image model, D max Indicates the maximum depth of field, D min Indicates the minimum depth of field, O max Indicates the maximum period difference, O min Indicates the minimum period difference.

[0089] According to the above mapping relationship, the period difference O of each point on the stereoscopic image model can be calculated by substituting the known values ​​of the parameters on the right side of the equation into x .

[0090] In one embodiment, in step S450, when the preset stereoscopic image effect is a floating effect, the period of each point on the stereoscopic image model can be calculated using the following formula:

[0091] T x =T1+O x

[0092] Among them, T x represents the period of each point on the stereoscopic image model, T1 represents the arrangement period of the microlens, O x Represents the period difference of each point on the stereo image model.

[0093] When the preset stereoscopic image effect is a sinking effect, the following formula can be used to calculate the period of each point on the stereoscopic image model:

[0094] T x =T1-O x

[0095] Among them, T x represents the period of each point on the stereoscopic image model, T1 represents the arrangement period of the microlens, O x Represents the period difference of each point on the stereo image model.

[0096] like Figure 3(a)-Figure 3(d) As shown, take the preset stereoscopic image effect as a sphere as an example:

[0097] First, obtain the focal length, period, refractive index and other parameters of the microlens, preset the spherical image effect, and set the maximum and minimum depths of field.

[0098] Then, three-dimensional modeling is performed according to the spherical image effect to form a spherical image model as shown in Figure 3(a). The spherical image model can be divided into two sub-spherical image models with the zero plane as the boundary, namely sub-model 1 as shown in Figure 3(b) and sub-model 2 as shown in Figure 3(c). Among them, the lowest point of sub-model 1 is above the zero plane, which is a floating effect, and the highest point of sub-model 2 is below the zero plane, which is a sinking effect.

[0099] Furthermore, the period of each point on sub-model 1 can be determined according to the data processing method corresponding to the floating effect involved in the above embodiment; the period of each point on sub-model 2 can be determined according to the data processing method corresponding to the sinking effect involved in the above embodiment.

[0100] Finally, the periods of each point on sub-model 1 and sub-model 2 are combined to obtain the periods of each point on the spherical image model, and then the periods of each point on the micro-image are determined. Taking the four-pointed star array image as an example, the four-pointed star array micro-image is deformed according to the periods of each point to obtain the target micro-image. The display effect presented by the target micro-image in combination with the microlens array is the spherical image effect, as shown in Figure 3 (d), which meets the required three-dimensional display requirements.

[0101] like Figure 4(a)-Figure 4(b) As shown, take the preset stereo image effect as a wavy surface as an example:

[0102] First, the focal length, arrangement period, refractive index and other parameters of the microlens are obtained, the wavy curved surface image effect is preset, and the maximum depth of field and the minimum depth of field are set according to the wavy curved surface image effect.

[0103] Then, three-dimensional modeling is performed according to the wavy surface image effect to form a wavy surface image model as shown in Figure 4(a). Among them, the lowest point of the wavy surface image model is above the zero plane, which is a floating effect.

[0104] Furthermore, the period of each point on the wavy surface image model can be determined according to the corresponding data processing method when the preset stereoscopic image effect is a floating effect involved in the above embodiment.

[0105] Since each point on the wavy surface image model corresponds to each point on the micro-image, after obtaining the period of each point on the wavy surface image model, it is equivalent to determining the period of each point on the micro-image. The dot array micro-image is deformed according to the period of each point to obtain the target micro-image. The display effect presented by the target micro-image in combination with the microlens array is the wavy surface image effect as shown in Figure 4(b), which meets the required three-dimensional display requirements.

[0106] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0107] Based on the same inventive concept, another embodiment of the present application further provides a dynamic amplification film. Figure 5 The dynamic amplification film provided in this embodiment includes a substrate 10, a micro-image 20 formed on one side of the substrate, and a microlens array 30 formed on the other side of the substrate 10. Each microlens in the microlens array 30 corresponds to each micro-image, and the arrangement period of the microlens is different from the arrangement period of the micro-image. The micro-image is a target micro-image produced by the method for producing micro-images provided in the above embodiment. For the specific production method of the micro-image, please refer to the specific description in the above embodiment, which will not be repeated here.

[0108] The image effect presented by the target micro-images produced by the micro-image production method provided in the above embodiment and the cooperation between the microlens array is the preset three-dimensional image effect, thereby producing micro-images that meet various three-dimensional display requirements, thereby obtaining a variety of three-dimensional display effects.

[0109] In one embodiment, the micro-image 20 is a concave-convex structure along a cross section perpendicular to the surface of the substrate 10. The concave-convex structure may be filled with a coloring material, such as ink or other materials.

[0110] In one embodiment, a reflective layer may be provided on the side of the microlens array 30 away from the micro-image 20. Thus, the observer can observe the stereoscopic reconstructed image on the side of the substrate 10, achieving a reflective 3D effect.

[0111] In one embodiment, the distance between the micro-image 20 and the micro-lens array 30 is within the focal length range of the micro-lens, thereby ensuring the imaging effect.

[0112] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for producing micro-pictures and texts, characterized in that: The method for making the micro-picture and text comprises: Acquire microlens parameters, wherein the microlens parameters include focal length, arrangement period, and refractive index; Preset stereoscopic image effects and set the maximum and minimum depth of field; Performing three-dimensional modeling according to the preset three-dimensional image effect to form a three-dimensional image model; Determine the period of each point on the stereoscopic image model according to the microlens parameters and the depth data of the stereoscopic image model, wherein the depth data includes the highest depth, the lowest depth and the depth of each point on the stereoscopic image model; According to the period of each point on the three-dimensional image model, the preset array type micro-image is deformed to obtain the target micro-image.

2. The method for producing micro-images according to claim 1, characterized in that: The step of determining the period of each point on the stereoscopic image model comprises: According to the preset stereo image effect, the highest depth of field and the lowest depth of field, the minimum period difference and the maximum period difference are calibrated; According to the minimum period difference and the maximum period difference, a mapping relationship between the period difference of each point on the stereoscopic image model and the depth of field is established to determine the period difference of each point on the stereoscopic image model; The period of each point on the stereoscopic image model is determined according to the period of the microlens, the minimum period difference and the period difference of each point on the stereoscopic image model.

3. The method for making micro-images according to claim 2, characterized in that: The step of calibrating the minimum period difference and the maximum period difference according to the preset stereoscopic image effect, the highest depth of field and the lowest depth of field comprises: When the preset stereoscopic image effect is a floating effect, the lowest point of the stereoscopic image model is above the zero plane, the minimum period difference is calibrated according to the highest depth of field, and the maximum period difference is calibrated according to the lowest depth of field. Calibrate using the following formula: Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 is the arrangement period of the microlenses.

4. The method for producing micro-images according to claim 3, characterized in that: When the preset stereoscopic image effect is a floating effect, the mapping relationship is: O x =O min +(O max -O min )×(D max -D x ) / (D max -D min ) Among them, O x represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereoscopic image model, D max Denotes the maximum depth of field, D min represents the minimum depth of field, O max represents the maximum period difference, O min represents the minimum period difference.

5. The method for producing micro-images according to claim 3, characterized in that: When the preset stereoscopic image effect is a floating effect, the period of each point on the stereoscopic image model is determined by the following formula: T x =T1+O x Among them, T x represents the period of each point on the stereoscopic image model, T1 is the arrangement period of the microlens, O x Represents the period difference of each point on the stereo image model.

6. The method for producing micro-images according to claim 2, characterized in that: The step of calibrating the minimum period difference and the maximum period difference according to the preset stereoscopic image effect, the highest depth of field and the lowest depth of field comprises: When the preset stereoscopic image effect is a sinking effect, the highest point of the stereoscopic image model is below the zero plane, the minimum period difference is calibrated according to the lowest depth of field, and the maximum period difference is calibrated according to the highest depth of field, Calibrate using the following formula: Among them, O min represents the minimum period difference, O max represents the maximum period difference, n1 is the refractive index of the microlens and micro-image material, n2 is the refractive index of the imaging space, f is the focal length of the lens, D min is the minimum depth of field, D max is the maximum depth of field, and T1 is the arrangement period of the microlenses.

7. The method for producing micro-images according to claim 6, characterized in that: When the preset stereoscopic image effect is a sinking effect, the mapping relationship is: O x =O max -(O max -O min )×(D min -D x ) / (D max -D min ) Among them, O x represents the period difference of each point on the stereo image model, D x Denotes the depth of field of each point on the stereoscopic image model, D max Denotes the maximum depth of field, D min represents the minimum depth of field, O max represents the maximum period difference, O min represents the minimum period difference.

8. The method for producing micro-images according to claim 6, characterized in that: When the preset stereoscopic image effect is a sinking effect, the period of each point on the stereoscopic image model is determined by the following formula: T x =T1-O x Among them, T x represents the period of each point on the stereoscopic image model, O x represents the period difference of each point on the stereoscopic image model, and T1 is the arrangement period of the microlenses.

9. The method for producing micro-images according to claim 1, characterized in that: The stereoscopic image model at least includes a hemispherical model, a spherical model and a wavy surface model.

10. A dynamic amplification film, characterized in that: The dynamic amplification film includes a substrate, micro-images formed on one side of the substrate, and a micro-lens array formed on the other side of the substrate, wherein each micro-lens in the micro-lens array corresponds to each micro-image; and the arrangement period of the micro-lenses is different from the arrangement period of the micro-image; Wherein, the micro-image and text is the target micro-image and text produced by the micro-image and text production method described in any one of claims 1 to 9.

11. The dynamic amplification film according to claim 10, characterized in that: The micro-image is a concave-convex structure along a cross section perpendicular to the surface of the substrate, and the concave-convex structure is filled with ink.

12. The dynamic amplification film according to claim 10, characterized in that: A reflective layer is disposed on a side of the microlens array away from the micro-images.

13. The dynamic amplification film according to claim 10, characterized in that: The distance between the micro-image and the micro-lens array is within the focal length range of the micro-lens.

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