Imaging Device and Imaging Method for Ultra-High Resolution Number Images on Microfilm

Abstract

This application relates to the field of optical micro-imaging technology, and in particular to an imaging device and an imaging method for an ultra-high resolution number image on a microfilm. The display shows four split images extracted from the image to be micro-scaled in four times in monochrome; the lens moves three times to achieve four exposures, so as to expose the four split images on the film respectively to form a high-resolution micro-image, and the lens moves three times within the imaging area of one RGB pixel point on the film. This application uses a display with a conventional resolution to achieve the micro-scaling of a high-resolution image to be micro-scaled, without the need to separately purchase a high-resolution display and a lens. It has a simple structure, low cost for image micro-scaling, small imaging error, fast speed, and stable operation.

Description

Technical Field

[0001] This application relates to the field of optical micro-imaging technology, and particularly to an imaging device and an imaging method for an ultra-large resolution number image on a microfilm. Background Art

[0002] The rapid development of information technology has brought huge changes to society. How to permanently store a large amount of digital image information in daily production and life is an urgent problem for us to solve. Currently, the main method used is to offline store digital image data on media such as optical discs, external hard drives, tapes, and USB flash drives. The damage of the media will directly cause the permanent loss of data, and computer viruses also constantly threaten data security.

[0003] The technology application of recording digital images onto microfilms is a secure off-line heterogeneous storage method for digital images; that is, digital images are exposed and imaged onto microfilms as a specific type of electronic file. The visual image film after developing, fixing, rinsing, and drying can be stored for up to 500 years, which can ensure the security of important data. At the same time, the images recorded on the film can also be restored to digital images through film image restoration imaging devices; therefore, the heterogeneous backup technology of digital image microforms is the only effective way to solve digital information security at present, and the device for outputting electronic information to microfilms is an important device for realizing the heterogeneous backup of electronic files.

[0004] To solve the problem of long-term storage of digital images, the inventor of the present application disclosed a technical solution in ZL201420309414.8 for recording digital images onto microfilms using an ultra-high-definition display flat panel monitor, which is a technical solution for outputting and recording digital images onto microfilms with low cost and stable performance.

[0005] Although current flat panel monitors and related display driving technologies have achieved an 8K resolution, for digital images that need to record higher resolutions, there is still a large gap in exposure imaging according to existing digital display technologies. For example, for computer-aided design widely used in engineering, according to relevant national standards, for an image file required for A0 format output, the digital image resolution needs to reach 10500X7200, approximately 80 million pixels, while the highest resolution of current monitors can reach 7680X4320 pixels, approximately 33 million pixels. Obviously, for ultra-large resolution digital images, the technical indicators of the method of one-time exposure and imaging onto microfilms cannot be met by existing technical solutions, and the microreduction of high-resolution images cannot be achieved. Summary of the Invention

[0006] To solve the above technical problems or at least partially solve the above technical problems, this application provides an imaging device and an imaging method for an ultra-large resolution number image on a microfilm.

[0007] In a first aspect, the present application provides an imaging device for an ultra-high resolution number image on a microfilm, comprising: a bracket, a display, a precision drive platform, a lens, a film, and a controller. The display is mounted on the bracket and is used to display a split image extracted from an image to be micro-reduced, and the resolution of the split image is one-fourth of the resolution of the image to be micro-reduced; the pixel points of the display are RGB pixel points; the precision drive platform is mounted on the bracket, the lens is connected to the precision drive platform, and the front end of the lens faces the display; the film is arranged on the bracket, and at least one section of the film faces the rear end of the lens; the precision drive platform is used to drive the lens to move between four exposure positions, and the lens moves within the imaging area of one RGB pixel point on the film; the controller is respectively communicatively connected to the precision drive platform, the controller sends a movement instruction to the precision drive platform, and after receiving the movement instruction, the precision drive platform moves the lens to the next exposure position; the controller is respectively communicatively connected to the display, the controller sends an exposure instruction to the display, and after receiving the exposure instruction, the display displays the split image corresponding to the exposure position where the lens is located in monochrome to complete one exposure.

[0008] In some embodiments, it further comprises a film drive unit arranged on the bracket, and the film drive unit is used to drive the film to move a set distance after four split images extracted from the same image to be micro-reduced are exposed.

[0009] In some embodiments, the film drive unit comprises a film drive shaft rotatably connected to the bracket and a motor connected to the film drive shaft, and the motor is communicatively connected to the controller; one end of the film is wound around the film drive shaft, and the other end of the film is wound around a film shaft, and the film shaft is rotatably connected to the bracket.

[0010] In some embodiments, the four exposure positions are distributed in a two-row and two-column manner.

[0011] In some embodiments, the display is used to display a black screen image after the exposure ends.

[0012] In a second aspect, the present application further provides an imaging method for an ultra-high resolution number image on a microfilm, comprising:

[0013] The controller controls the lens to be located at four exposure positions in four times;

[0014] The controller controls the display to display four split images extracted from the image to be miniaturized in monochrome in four times. The resolution of the split images is one-fourth of the resolution of the image to be miniaturized, so that the lens exposes the four split images on the film at the four exposure positions respectively to form a high-resolution miniature image, and the lens moves three times within the imaging area of one RGB pixel point on the film.

[0015] In some embodiments, the controller controls the lens to be located at four exposure positions in four times; the controller controls the display to display four split images extracted from the image to be miniaturized in monochrome in four times, so that the lens exposes the four split images on the film at the four exposure positions respectively, including:

[0016] The controller controls the lens to be located at the first exposure position;

[0017] After the lens is located at the first exposure position, the controller controls the display to display the first split image in monochrome, so that the lens exposes the first split image at the first exposure position;

[0018] After the lens exposes the first split image, the controller controls the lens to be located at the second exposure position;

[0019] After the lens is located at the second exposure position, the controller controls the display to display the second split image in monochrome, so that the lens exposes the second split image at the second exposure position;

[0020] After the lens exposes the second split image, the controller controls the lens to be located at the third exposure position;

[0021] After the lens is located at the third exposure position, the controller controls the display to display the third split image in monochrome, so that the lens exposes the third split image at the third exposure position;

[0022] After the lens exposes the third split image, the controller controls the lens to be located at the fourth exposure position;

[0023] After the lens is located at the fourth exposure position, the controller controls the display to display the fourth split image in monochrome, so that the lens exposes the fourth split image at the fourth exposure position.

[0024] In some embodiments, the splitting method of the four split images extracted from the image to be miniaturized is:

[0025] The image to be miniaturized is processed into four split images with the same number of physical pixel points as the display according to the pixel point interlaced and interleaved sampling method.

[0026] In some embodiments, the pixel points located in the first row and first column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the first split image;

[0027] The pixel points located in the first row and second column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the second split image;

[0028] The pixel points located in the second row and second column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the third split image;

[0029] The pixel points located in the second row and first column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the fourth split image.

[0030] In some embodiments, the four exposure positions are distributed in a two-row and two-column manner, and the first exposure position is located in the first row and first column, the second exposure position is located in the first row and second column, the third exposure position is located in the second row and second column, and the fourth exposure position is located in the second row and first column.

[0031] In some embodiments, the method further includes:

[0032] After the lens exposes the split image on the film at each exposure position, the controller controls the display to display a black screen image.

[0033] The above technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0034] The imaging device provided by the present application exposes the picture of the display on the film through the lens. The lens can be translated relative to the film to expose at different positions on the film. The lens moves three times to achieve four exposures, so as to expose four split images on the film respectively to form a high-resolution miniaturized image. And the lens moves three times within the imaging area of one RGB pixel point on the film, and the display displays the split image in monochrome, so that the four exposure images within the same pixel point of the display can be exposed onto the film within the imaging area equivalent to one pixel point of the display. The present application uses a display with a conventional resolution to miniaturize a to-be-miniaturized image with a high resolution, without the need to separately purchase a high-resolution display and lens, has a simple structure, a low cost for image miniaturization, small imaging errors, high speed, and stable operation.

[0035] The imaging method provided by this application is such that the display shows four split images extracted from the image to be miniaturized in four times with monochromatic colors; the lens moves three times to achieve four exposures, so as to expose the four split images on the film respectively to form a high-resolution miniature image, and the lens moves three times within the imaging area of one RGB pixel point on the film. This application uses a display with conventional resolution to achieve the miniaturization of a high-resolution image to be miniaturized, without the need to separately purchase a high-resolution display and lens. The image miniaturization cost is low, the imaging error is small, the speed is fast, and the work is stable. Description of the Drawings

[0036] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with this application, and are used together with the specification to explain the principles of this application.

[0037] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 Front view of the imaging device described in the embodiment of this application;

[0039] Figure 2 Side view of the imaging device described in the embodiment of this application;

[0040] Figure 3 Stereogram of the imaging device described in the embodiment of this application;

[0041] Figure 4 Schematic diagram of the pixel point distribution of the image to be miniaturized described in the embodiment of this application;

[0042] Figure 5 Temporary image obtained after extracting the images of all A-series pixel points in the embodiment of this application;

[0043] Figure 6 One split image composed of all A-series pixel points described in the embodiment of this application;

[0044] Figure 7 Schematic diagram of the relative positions of four exposures in the area equivalent to one pixel point of the display on the film described in the embodiment of this application;

[0045] Figure 8 Schematic diagram of the change of the exposure picture on the film during the four-exposure process of this application;

[0046] Figure 9 Flowchart of the imaging method of an ultra-high-resolution number image on a microfilm described in the embodiment of this application;

[0047] Among them, 1. display; 2. lens; 3. precision drive platform; 4. film; 5. film shaft; 6. film drive shaft; 7. bracket. Specific embodiments

[0048] In order to more clearly understand the above objects, features, and advantages of the present application, the solution of the present application will be further described below. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0049] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present application, rather than all of the embodiments.

[0050] As Figures 1 to 3 shown, the present application provides an imaging device for a super-high-resolution number image on a microfilm, including: bracket 7, display 1, precision drive platform 3, lens 2, film 4, and controller;

[0051] Specifically, the bracket 7 is the support structure of the imaging device, used to install components such as the display 1, precision drive platform 3, lens 2, and film 4 in the imaging device, so as to maintain a certain relative position between some components;

[0052] The display 1 is installed on the bracket 7 and is used to display the split image extracted from the image to be microfilmed. The resolution of the split image is one-fourth of the resolution of the image to be microfilmed; the pixel points of the display 1 are RGB pixel points;

[0053] Specifically, the display 1 is generally fixedly installed to avoid the movement and vibration of the display 1 affecting the microfilming effect of the image; the resolution of the display 1 generally selects a product with a relatively high resolution on the market. For example, a display 1 with a resolution of 7680X4320 is used to obtain the best microfilming effect. When the resolution of the image to be microfilmed is higher than the resolution of the display 1, the display 1 cannot display the entire image to be microfilmed at one time. Therefore, 4 images are extracted from the image to be microfilmed by the method of splitting and taking points at every other row and every other column, and then the positions of the unextracted pixel points are deleted, and the split image with only one-fourth of the pixels of the original image to be microfilmed is processed.

[0054] For example, as Figures 4 - 6 shown, when the resolution of the image to be microfilmed is 12200X 8640, 4 images as shown in Figure 5 shown can be formed after splitting at every other row and every other column, Figure 5There is a black area of one pixel between the pixel points. By deleting these black areas, 4 split images with a resolution of 6100X4320 as shown in Figure 6 can be obtained. In this way, the monitor 1 can be used to display four times respectively for exposure.

[0055] The pixel points of the monitor 1 are all RGB pixel points, and the brightness of the three-color light sources can be adjusted respectively. Therefore, true colors can be displayed. For example, when the brightness of the red and blue light sources of all pixel points is adjusted to the lowest or turned off, only the green light source emits light for all pixel points of the monitor 1, thus realizing monochromatic display.

[0056] The precision drive platform 3 is installed on the bracket 7. The lens 2 is connected to the precision drive platform 3, and the front end of the lens 2 faces the monitor 1; the film 4 is arranged on the bracket 7, and at least one section of the film 4 faces the rear end of the lens 2; the precision drive platform 3 is used to drive the lens 2 to move between four exposure positions, and the lens 2 moves within the imaging area of one RGB pixel point on the film 4. It should be noted that the lens 2 does not move within the actual imaging area of one RGB pixel point on the film 4, but moves within an area equivalent to the imaging area of one RGB pixel point on the film 4.

[0057] Specifically, the front end of the lens 2 faces the monitor 1, and the central axis of the lens 2 is perpendicular to the monitor 1. No matter how the film 4 moves, the section of the film 4 facing the rear end of the lens 2 should be perpendicular to the axis of the lens 2 to avoid distortion of the image exposed on the film 4 and ensure the microreduction quality; the precision drive platform 3 includes a fixed end and a mobile end. The fixed end is installed on the bracket 7, and the mobile end is connected to the lens 2. When the mobile end generates a displacement relative to the fixed end, the lens 2 can be driven to move. The four exposure positions are located in the same plane parallel to the monitor 1, and the area where the four exposure positions are located is a definite range; the size of one physical pixel point of the monitor 1 is fixed, and the range exposed on the film 4 after being scaled by a certain ratio is also fixed, that is, the imaging area of one pixel point on the film 4; the lens 2 moves within the imaging area of one RGB pixel point on the film 4. The pixel point size of the monitor 1 is already a micron-level structure, and after microreduction, it almost reaches the micron or nanometer level. Therefore, the precision requirements for the precision drive platform 3 are relatively high. Some imported equipment can already achieve precise movement within this size range, and it can be directly purchased and used;

[0058] The controller is respectively communicatively connected to the precision drive platform 3. The controller sends a movement instruction to the precision drive platform 3, and after receiving the movement instruction, the precision drive platform 3 moves the lens 2 to the next exposure position;

[0059] Specifically, the controller is used to control the movement of the precision drive platform 3. The precision drive platform 3 receives a movement instruction and moves the lens 2 once; the controller sends four movement instructions, and the lens 2 reaches four exposure positions respectively; the residence time of the lens 2 at the exposure position = the interval time of the controller sending the movement instruction - the time for the precision drive platform 3 to move the lens 2 from one exposure position to another exposure position, so that the control of the residence time of the lens 2 can be realized, and sufficient exposure time can be provided for each exposure;

[0060] The controller is respectively communicatively connected with the display 1. The controller sends an exposure instruction to the display 1. After receiving the exposure instruction, the display 1 displays the split image corresponding to the exposure position where the lens 2 is located in monochrome to complete one exposure.

[0061] Specifically, after the display 1 receives the exposure instruction sent by the controller, it displays a split image, which corresponds to the current exposure position of the lens 2, that is, the exposure instruction contains the information of the split image that needs to be displayed by the display 1; it can be understood that the correspondence between the four split images and the exposure positions is determined. The controller obtains the status information of the precision drive platform 3 to obtain the exposure position where the lens 2 is located, and then determines the split image that the display 1 is about to display according to this information, and then includes the identification information of the image in the exposure instruction and sends it to the display 1. This is only an implementation manner for easy understanding, and other ways that can display a determined image are also applicable to this application. Those skilled in the art should know that the exposure process only lasts for a very short time, such as 50 ms. After the exposure ends, the display 1 no longer displays the split image. It can choose to temporarily turn off the display 1, or make all the pixel points of the display 1 display black. The display 1 displays the split image in monochrome. The pixel points of the display 1 are composed of three-color light sources. Displaying in monochrome means that all pixel points turn on the light source of the same color among red, green, and blue, and the brightness of the corresponding color at the pixel point does not change, but the other two colors are not displayed; after such exposure, only a part of the area corresponding to a display pixel point on the film 4 is exposed; then move the lens 2 to the next exposure position to expose the next split image, that is, all four exposures are projected onto the area corresponding to a display pixel point on the film 4, but the exposure positions are different; furthermore, the four exposures are used to fill the area equivalent to a similar point on the film 4, so as to microscale the to-be-microscaled image with a resolution higher than that of the display 1 onto the film 4. In terms of relative position, the area on the film 4 equivalent to a pixel point of the display 1 corresponds to four pixel points in two adjacent rows and two adjacent columns of the to-be-microscaled image. The four exposure positions correspond to the original pixel point positions of the to-be-microscaled image, ensuring the microscale effect.

[0062] The exposure principle on the film 4 is as follows: Figure 7The imaging area of a pixel of the display 1 on the film 4 is outlined by the dotted line in the middle. The area corresponding to the RGB below refers to the positions of the three-color light sources within the pixel of the display 1 on the film 4. Below the three-color light sources is the area equivalent to the pixel driving circuit. The four ellipses A, B, C, and D are the imaging areas of the same pixel of the display on the film after four exposures, and the four ellipses A, B, C, and D respectively correspond to the first exposure position, the second exposure position, the third exposure position, and the fourth exposure position. Figure 8 The following shows the local image changes on the film 4 during the four-exposure process. After four exposures, all positions on the film 4 are filled in this way, and the microreduction ends. The four exposure positions are distributed in a two-row and two-column manner, that is, the four exposure positions are distributed in the orientation like the areas A, B, C, and D in Figure 7 the figure.

[0063] This application uses a display 1 with a conventional resolution to achieve the microreduction of a high-resolution image to be microreduced, without the need to separately purchase a high-resolution display 1 and a lens 2, and the image microreduction cost is low; there is no manual participation throughout the exposure process, the imaging error is small, the imaging speed is fast, and the work is stable; except for the precision driving platform 3 which is relatively precise, the entire imaging device has a simple structure and a low assembly cost; since an RGB display 1 is used for monochromatic exposure, it can be used to microreduce images to be microreduced with relatively low color requirements, such as drawings, black-and-white photos, texts, etc.

[0064] As Figures 1 - 3 shown, in some embodiments, this application further includes a film 4 driving unit provided on the bracket 7, and the film 4 driving unit is used to drive the film 4 to move a set distance after the exposure of four split images extracted from the same image to be microreduced is completed.

[0065] Specifically, only the exposure process of one image to be microreduced was described above. When multiple images to be microreduced need to be microreduced, the film 4 needs to be moved. Otherwise, the microreduced images of two images to be microreduced will overlap. Therefore, the film 4 driving unit is proposed; the function of the film 4 driving unit is very simple, that is, after the microreduction of the current image to be microreduced is completed, the exposed part of the film 4 is moved away, so that the next unexposed part of the film 4 is opposite to the rear end of the lens 2, preparing for the microreduction of the next image to be microreduced. The film 4 driving unit can also be communicatively connected to the controller to achieve automatic control without manual participation; of course, manual operation can also be selected.

[0066] As Figures 1 to 3As shown, in some embodiments, the film 4 driving unit includes a film driving shaft 6 rotatably connected to the bracket 7 and a motor connected to the film driving shaft 6, and the motor is communicatively connected to the controller; one end of the film 4 is wound around the film driving shaft 6, and the other end of the film 4 is wound around a film shaft 5, and the film shaft 5 is rotatably connected to the bracket 7.

[0067] Specifically, both ends of the film 4 are wound around the film driving shaft 6 and the film shaft 5 respectively, so as to stretch the film 4, making the part of the film 4 opposite to the rear end of the lens 2 in a fixed position and parallel to the display 1; the film shaft 5 is rotatable and belongs to a driven structure. The film driving shaft 6 is driven by a motor, and the motor is controlled by the controller, realizing full-automatic control without manual participation and improving the quality. It can be understood that the first exposure position is set as the initial position of the lens 2. Whenever returning to this initial position, it can be determined that the micro-imaging of a to-be-micro-imagined image is completed, and the controller sends an instruction to the motor, and the film 4 moves a set distance; the set distance refers to the distance that the film 4 translates relative to the lens 2 each time, with the basic requirement of not affecting the micro-imaging quality of the next to-be-micro-imagined image, and the size of the set distance is subject to the actual situation.

[0068] Optionally, the film 4 between the film shaft 5 and the film driving shaft 6 is parallel to the display 1.

[0069] Specifically, as Figures 1 - 3 shown, the film 4 is installed on the film shaft 5 and the film driving shaft 6, and there is no element in the middle that changes the walking path of the film 4. Only the film shaft 5 and the film driving shaft 6 are used to tension the film 4. Therefore, a damping element should be provided on the film shaft 5 to ensure the tension of the film 4; at the same time, the distance between the film shaft 5 and the film driving shaft 6 should not be too large, otherwise the vibration amplitude of the film 4 at the rear end of the lens 2 is too large, affecting the micro-imaging effect.

[0070] Optionally, the present application further includes a first guiding shaft rotatably connected to the bracket 7, and the film 4 passes through the first guiding shaft, and the film 4 between the first guiding shaft and the film shaft 5 or the film 4 between the first guiding shaft and the film driving shaft 6 is parallel to the display 1.

[0071] Specifically, a first guiding wheel is added between the film shaft 5 and the film driving shaft 6. The guiding wheel is installed near the rear end of the lens 2. The film shaft 5 or the film driving shaft 6 is relatively close to the lens 2, so that the stability of the film 4 opposite to the rear end of the lens 2 can be improved. The installation position of the film shaft 5 or the film driving shaft 6 with a relatively large distance has a wider selection range, which is convenient for the layout design of the internal components of the entire imaging device.

[0072] Optionally, the present application further includes two second guiding shafts rotatably connected to the bracket 7, and both of the two second guiding shafts are located behind the lens 2; the film 4 sequentially passes through the two second guiding shafts, and the film 4 between the two second guiding shafts is parallel to the display 1.

[0073] Specifically, a second guiding wheel is provided on each side of the rear end of the lens 2 to ensure the stability of the film 4 facing the rear end of the lens 2, and the film 4 at other positions can select a suitable walking path according to needs; as the thickness of the wound film 4 changes, the film shaft 5 or the film driving shaft 6 will inevitably change in the new tangent direction of the film 4. Setting two second guiding wheels can eliminate this influence; a single second guiding wheel has a small volume, and only one layer of film 4 passes through it. The state of the film 4 between the two second guiding wheels is stable, and the film 4 will not be inclined or vibrate significantly, ensuring the microfilm effect.

[0074] In some embodiments, the display 1 is used to display a black screen image after the exposure is completed.

[0075] Specifically, the exposure process only takes dozens of milliseconds. The display 1 cannot display a bright image after the exposure is completed, otherwise it will be exposed on the film 4; a to-be-microfilmed image needs to be exposed four times, and the exposure action is very frequent; however, the service life of the power switch of the display 1 is limited, and it is obviously inappropriate to directly turn off the display 1 during the exposure gap. Therefore, the method of making all pixel points of the display 1 display black is adopted to achieve this. This belongs to the color change of the pixel points of the display 1 and belongs to the normal use range of the display 1. The display 1 is not easily damaged, and the service life of the entire imaging device is long.

[0076] Since the imaging device only has a lens 2 without a shutter, as long as there is a non-black image on the display 1, it will be immediately exposed onto the film 4. Therefore, except for the four time periods of the four exposures, the display 1 respectively displays four split images, and the display 1 displays a black screen image at other times.

[0077] As Figure 9 shown, this embodiment discloses an imaging method of an ultra-high resolution number image on a microfilm 4, and this method is implemented based on the foregoing imaging device. This imaging method may include the following steps 901 and 902:

[0078] 901. The controller controls the lens 2 to be located at four exposure positions in four times;

[0079] 902. The controller controls the display 1 to display the four split images extracted from the to-be-miniaturized image in monochrome in four times. The resolution of the split images is one-fourth of the resolution of the to-be-miniaturized image, so that the lens 2 exposes the four split images on the film 4 at the four exposure positions respectively, and the lens 2 moves three times within the imaging area of one RGB pixel point on the film 4.

[0080] In step 901, specifically: The controller sends a movement instruction to the precision drive platform 3. After receiving the movement instruction, the precision drive platform 3 moves the lens 2 to the next exposure position, thereby realizing the control of the lens 2 to be located at the four exposure positions in four times.

[0081] It can be seen that the display 1 displays the four split images extracted from the to-be-miniaturized image in monochrome in four times; the lens 2 moves three times to achieve four exposures, so as to expose the four split images on the film 4 respectively to form a high-resolution miniaturized image, and the lens 2 moves three times within the imaging area of one RGB pixel point on the film 4. This application uses a display 1 with a conventional resolution to realize the miniaturization of a to-be-miniaturized image with a high resolution, without the need to separately purchase a display 1 and a lens 2 with a high resolution. The image miniaturization cost is low, the imaging error is small, the speed is fast, and the work is stable.

[0082] In some embodiments, the splitting method of the four split images extracted from the to-be-miniaturized image is as follows:

[0083] The to-be-miniaturized image is processed into four split images with the same number of physical pixel points as the display 1 by the method of taking points at intervals of rows and columns of pixel points.

[0084] In some embodiments, the pixel points located in the first row and first column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the first split image;

[0085] The pixel points located in the first row and second column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the second split image;

[0086] The pixel points located in the second row and second column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the third split image;

[0087] The pixel points located in the second row and first column of the to-be-miniaturized image, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the fourth split image.

[0088] Figures 4 to 6 The splitting process of the first split image is shown. First, as Figure 4, the pixel at the first row and first column of the image to be miniaturized is marked as A, and the pixels at every other row and every other column of this pixel A are also marked as A until the entire image to be miniaturized is marked; secondly, as Figure 5 , all the pixels marked as A are taken out, and finally, all the taken-out pixels A are processed into the first split image. The splitting processes for the second, third, and fourth split images are similar and will not be elaborated here.

[0089] In some embodiments, the four exposure positions are distributed in a two-row and two-column manner, with the first exposure position at the first row and first column, the second exposure position at the first row and second column, the third exposure position at the second row and second column, and the fourth exposure position at the second row and first column.

[0090] As Figure 7 shown, Figure 7 The area outlined by the dashed line in is the imaging area of a pixel of the display 1 on the film 4. The area corresponding to RGB below refers to the positions of the three-color light sources equivalent to those within a pixel of the display 1 on the film 4, and below the three-color light sources is the area equivalent to the pixel driving circuit arrangement; the four ellipses A, B, C, and D are the imaging areas of the same pixel of the display 1 after four exposures on the film 4, and the four ellipses A, B, C, and D respectively correspond to the first exposure position, the second exposure position, the third exposure position, and the fourth exposure position.

[0091] In some embodiments, in step 901, the controller controls the lens 2 to be located at the four exposure positions in four times; and in step 902, the controller controls the display 1 to display four split images extracted from the image to be miniaturized in four times in monochromatic, so that the lens 2 exposes the four split images on the film 4 at the four exposure positions respectively, specifically:

[0092] The controller controls the lens 2 to be located at the first exposure position;

[0093] After the lens 2 is located at the first exposure position, the controller controls the display 1 to display the first split image in monochromatic, so that the lens 2 exposes the first split image at the first exposure position;

[0094] After the lens 2 exposes the first split image, the controller controls the lens 2 to be located at the second exposure position;

[0095] After the lens 2 is located at the second exposure position, the controller controls the display 1 to display the second split image in monochromatic, so that the lens 2 exposes the second split image at the second exposure position;

[0096] After the lens 2 exposes the second split image, the controller controls the lens 2 to be located at the third exposure position;

[0097] After the lens 2 is located at the third exposure position, the controller controls the display 1 to display the third split image in monochrome, so that the lens 2 exposes the third split image at the third exposure position;

[0098] After the lens 2 exposes the third split image, the controller controls the lens 2 to be located at the fourth exposure position;

[0099] After the lens 2 is located at the fourth exposure position, the controller controls the display 1 to display the fourth split image in monochrome, so that the lens 2 exposes the fourth split image at the fourth exposure position.

[0100] The above exposure process is as Figure 8 shown. The first split image is exposed at the first exposure position, and all pixel points in the first split image are A; the second split image is exposed at the second exposure position, and all pixel points in the second split image are B; the third split image is exposed at the third exposure position, and all pixel points in the third split image are C; the fourth split image is exposed at the fourth exposure position, and all pixel points in the fourth split image are D.

[0101] In some embodiments, the method further includes:

[0102] After the lens 2 exposes the split image on the film 4 at each exposure position, the controller controls the display 1 to display a black screen image.

[0103] Since the imaging device only has the lens 2 and no shutter, as long as there is a non-black image on the display 1, it will be immediately exposed onto the film 4. Therefore, except for the four time periods of the four exposures when the display 1 respectively displays four split images, the display 1 displays a black screen image at other times.

[0104] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0105] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments described herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An imaging device for an ultra-high resolution digital image on a microfilm, characterized in that, Comprising: a bracket, a display, a precision drive platform, a lens, a film, and a controller, wherein the display is mounted on the bracket and is used to display a split image extracted from a to-be-miniaturized image, and the resolution of the split image is one-fourth of the resolution of the to-be-miniaturized image; the pixel points of the display are RGB pixel points; the precision drive platform is mounted on the bracket, the lens is connected to the precision drive platform, and the front end of the lens faces the display; the film is arranged on the bracket, and at least one section of the film faces the rear end of the lens; the precision drive platform is used to drive the lens to move between four exposure positions, and the lens moves within the imaging area of one RGB pixel point on the film, and the four exposure positions are located in the same plane parallel to the display; the controller is respectively communicatively connected to the precision drive platform, the controller sends a movement instruction to the precision drive platform, and after receiving the movement instruction, the precision drive platform moves the lens to the next exposure position, and the residence time of the lens at the exposure position is the difference between the interval time of the controller sending the movement instruction and the time taken by the precision drive platform to move the lens from one exposure position to another exposure position; the controller is respectively communicatively connected to the display, the controller sends an exposure instruction to the display, and after receiving the exposure instruction, the display displays the split image corresponding to the exposure position where the lens is located in monochrome to complete one exposure; the display is used to display a black screen image after the exposure is completed.

2. The imaging device for an ultra-high resolution digital image on a microfilm according to claim 1, characterized in that, It further includes a film drive unit arranged on the bracket, and the film drive unit is used to drive the film to move a set distance after the four split images extracted from the same to-be-miniaturized image are exposed.

3. The imaging device for an ultra-high resolution digital image on a microfilm according to claim 2, characterized in that, The film drive unit includes a film drive shaft rotatably connected to the bracket and a motor connected to the film drive shaft, and the motor is communicatively connected to the controller; one end of the film is wound around the film drive shaft, and the other end of the film is wound around a film shaft, and the film shaft is rotatably connected to the bracket.

4. The imaging device for an ultra-high resolution digital image on a microfilm according to any one of claims 1-3, characterized in that, The four exposure positions are distributed in a two-row and two-column manner.

5. An imaging method for an ultra-high resolution digital image on a microfilm, characterized in that, Comprising: the controller controls the lens to be located at four exposure positions in four times, and the residence time of the lens at the exposure position is the difference between the interval time of the controller sending the movement instruction and the time taken by the precision drive platform to move the lens from one exposure position to another exposure position; the controller controls the display to display four split images extracted from the to-be-miniaturized image in monochrome in four times, and the resolution of the split image is one-fourth of the resolution of the to-be-miniaturized image, so that the lens exposes the four split images on the film at the four exposure positions respectively, and the lens moves three times within the imaging area of one RGB pixel point on the film, and the four exposure positions are located in the same plane parallel to the display; after the lens exposes the split image on the film at each exposure position, the controller controls the display to display a black screen image.

6. The method according to claim 5, characterized in that, The controller controls the lens to be located at four exposure positions in four times; the controller controls the display to display four split images extracted from the image to be miniaturized in monochrome in four times, so that the lens exposes the four split images on the film at the four exposure positions respectively, including: The controller controls the lens to be located at the first exposure position; After the lens is located at the first exposure position, the controller controls the display to display the first split image in monochrome, so that the lens exposes the first split image at the first exposure position; After the lens exposes the first split image, the controller controls the lens to be located at the second exposure position; After the lens is located at the second exposure position, the controller controls the display to display the second split image in monochrome, so that the lens exposes the second split image at the second exposure position; After the lens exposes the second split image, the controller controls the lens to be located at the third exposure position; After the lens is located at the third exposure position, the controller controls the display to display the third split image in monochrome, so that the lens exposes the third split image at the third exposure position; After the lens exposes the third split image, the controller controls the lens to be located at the fourth exposure position; After the lens is located at the fourth exposure position, the controller controls the display to display the fourth split image in monochrome, so that the lens exposes the fourth split image at the fourth exposure position.

7. The method according to claim 5 or 6, characterized in that, The splitting method of the four split images extracted from the image to be miniaturized is as follows: The image to be miniaturized is processed into four split images with the same number of physical pixel points as the display by the method of splitting and taking points at every other row and every other column of pixel points.

8. The method according to claim 7, characterized in that, The pixel points located in the first row and first column of the image to be miniaturized, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the first split image; The pixel points located in the first row and second column of the image to be miniaturized, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the second split image; The pixel points located in the second row and second column of the image to be miniaturized, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the third split image; The pixel points located in the second row and first column of the image to be miniaturized, the pixel points every other row of this pixel point, and the pixel points every other column are all pixel points in the fourth split image.

9. The method according to claim 8, wherein The four exposure positions are distributed in a two-row and two-column manner, and the first exposure position is located in the first row and first column, the second exposure position is located in the first row and second column, the third exposure position is located in the second row and second column, and the fourth exposure position is located in the second row and first column.

Images