High-speed photographic apparatus with synchronous label correction function and synchronous label correction method
By using a high-speed scanner with simultaneous marking and correction functions, the camera and projection components are used to realize automatic correction and annotation of paper documents, solving the problem of users switching between paper and electronic screens and improving efficiency.
Patent Information
- Application Number
- CN202510964378.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-14
- Publication Date
- 2025-10-03
AI Technical Summary
When users of existing scanners correct and annotate paper documents, their sight and attention need to switch back and forth between the paper document and the electronic screen, which consumes time and energy.
A high-speed scanner with the function of synchronous annotation and correction is designed. It collects paper document image information through a camera, analyzes it using edge detection algorithm and OCR recognition algorithm, generates annotation information, and projects the annotation pattern directly onto the paper document through the projection component to achieve synchronous annotation and correction.
Users do not need to switch their vision and attention back and forth between paper documents and electronic screens. They can directly process paper documents according to the marked patterns, saving time and energy.
Smart Images
Figure CN120751064A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of high-speed scanners, and in particular to a high-speed scanner with a synchronous marking and correction function and a synchronous marking and correction method. Background Art
[0002] A high-definition scanner is a digital image capture device that converts paper documents and other media into digital signals through non-contact photography and outputs them to devices such as computers. This meets users' needs for digital office work, as well as those that combine digital and paper work. Currently, existing high-definition scanners have shortcomings in this combined digital and paper work environment: after the electronic device automatically corrects and annotates the digital document, the user needs to review the paper document on the electronic screen. During this process, the user's vision and attention switch back and forth between the paper document and the electronic screen, which is time-consuming and energy-consuming. Summary of the Invention
[0003] The main purpose of the present invention is to propose a high-speed scanner with synchronous marking and correction functions and a synchronous marking and correction method, which aims to solve the technical problem that when users of existing high-speed scanners correct and annotate paper documents, their vision and attention need to switch back and forth between paper documents and electronic screens, which wastes time and energy.
[0004] To achieve the above-mentioned objectives, the present invention proposes a high-speed scanner with a synchronous marking and correction function, which includes a camera, a mounting bracket and a scanner body, wherein the camera is arranged on the mounting bracket, and the scanner body includes a printed circuit board, which is electrically connected to the camera; it also includes a projection component, which is arranged on the mounting bracket, and the printed circuit board is integrated with a core processor and algorithm program firmware, wherein the algorithm program firmware includes an edge detection algorithm and an OCR recognition algorithm, and the projection component is electrically connected to the printed circuit board.
[0005] Optionally, the projection assembly includes a projection housing, a driver IC, a light source, an imaging core, and an optical lens group, wherein the projection housing is disposed on a mounting frame, and the driver IC, the light source, the imaging core, and the optical lens group are all installed in the projection housing; The light source is installed at the rear of the projection housing, the imaging core is arranged in front of the light source, the optical lens group is arranged in front of the imaging core, and the driver IC is electrically connected to the printed circuit board, the light source, the imaging core and the optical lens group respectively.
[0006] Optionally, the algorithm program firmware further includes a coordinate mapping engine, and the driver IC includes an electronic compensation module.
[0007] Optionally, the projection assembly further includes a heat dissipation structure, and the heat dissipation structure is arranged at the light source and the imaging core.
[0008] The present invention also discloses a synchronous marking and correction method, which is implemented using the high-speed scanner with the synchronous marking and correction function as described above, and includes the following steps: S1: The user places the paper document to be processed in the projection area of the high-speed scanner, and the high-speed scanner collects image information of the paper document through the camera; S2: The image information collected by the camera is transmitted to the printed circuit board and analyzed by the edge detection algorithm and OCR recognition algorithm integrated in the printed circuit board; S3: The core processor digitizes the analysis results of the edge detection algorithm and the OCR recognition algorithm and generates annotation information; S4: The annotation information is transmitted to the projection component. The projection component generates an annotation pattern according to the annotation information and projects it onto the paper document. The user processes the paper document according to the annotation pattern.
[0009] Optionally, the method further includes the following steps: S5: The position of the paper document is detected in real time through the camera. When the displacement of the paper document is detected to exceed the preset threshold, the camera sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board then outputs compensation information based on the displacement compensation signal, and generates a compensated annotation pattern through the electronic compensation module and projection component and projects it onto the paper document. The user continues to process the paper document according to the annotation pattern.
[0010] Optionally, step S5 includes the following steps: S51: The position of the paper document is detected in real time by the camera. When the displacement of the paper document is detected to exceed a preset threshold, the camera sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board outputs compensation information based on the displacement compensation signal, and generates a compensated annotation pattern through the electronic compensation module and the projection component and projects it onto the paper document. S52: collecting image information of the compensated annotation pattern and the corresponding paper document through a camera, and analyzing the image information using an edge detection algorithm and an OCR recognition algorithm to determine whether the projection position of the compensated annotation pattern generated in step S51 is accurate; S53: If the projection position is accurate, the verification is completed; if the projection position is inaccurate, new compensation information is generated through the edge detection algorithm, OCR recognition algorithm and coordinate mapping engine, and then a new compensated annotation pattern is generated through the electronic compensation module and projection component and projected onto the paper document.
[0011] Optionally, the coordinate mapping engine outputs compensation information including: Input data: the document boundary corner points output by the edge detection algorithm, the annotation target center output by the OCR recognition algorithm, and the translation output by the camera are input into the coordinate mapping engine; Transformation processing: Establish a document coordinate system based on the document boundary corner points output by the edge detection algorithm. Convert the annotation target coordinates to relative positions in the document coordinate system based on the annotation target center output by the OCR recognition algorithm. Superimpose the camera translation amount based on the camera translation amount, and convert the millimeter coordinates to projector pixel coordinates using pre-calibrated conversion parameters. Output compensation information, i.e. projector pixel coordinates.
[0012] Optionally, the edge detection algorithm analyzes the image information including: Image preprocessing: converting color images into grayscale images and convolving the grayscale images with Gaussian filtering to reduce noise; Edge detection: calculate gradient, perform non-maximum suppression and double threshold detection on the grayscale image after image preprocessing, and output a binary edge image; Contour extraction: find all closed contours in the binary edge map and select the contour with the largest contour area; Angle detection and perspective transformation convert the contour with the largest area into four corner points, and correct the document area into a rectangle through perspective transformation to confirm the document boundary.
[0013] Optionally, the OCR recognition algorithm analyzes the image information including: Text region detection, finding the location of text lines in a document image parsed by an edge detection algorithm; Text recognition: grayscale, binarization, denoising, and normalization are performed on the image within each text box, and convolutional recurrent neural network is used for recognition to obtain text; Post-processing: correcting errors in the recognized text.
[0014] The technical solution of the present invention has the following beneficial effects: Image information is acquired through camera capture and analyzed using edge detection and OCR algorithms to generate annotation information. The projection component then generates an annotation pattern based on the annotation information and projects it onto a paper document. The user can then process the paper document in accordance with the annotation pattern. Compared to existing high-definition scanners, this high-definition scanner with synchronous annotation and correction capabilities can directly generate annotation patterns and project them onto paper documents after automatically correcting and annotating digital documents, allowing users to process the paper document in accordance with the annotation patterns. The user's line of sight and attention does not need to switch back and forth between the paper document and the electronic screen, effectively saving the user's time and energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0016] Figure 1 This is a schematic diagram of the overall structure of a high-speed scanner with a synchronous marking and correction function according to the present invention; Figure 2 This is a logic block diagram of a synchronous marking and correction method of the present invention; Figure 3 This is a flowchart of the overall steps of a synchronous marking and correction method of the present invention; Figure 4 This is a flowchart of step S5 in a synchronous marking and correction method of the present invention.
[0017] Description of the accompanying drawings: camera 1, mounting bracket 2, horizontal bar 21, vertical bar 22, projection assembly 3, base 4, control button 5, marking pattern 6.
[0018] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0022] The present invention provides a high-speed scanner with synchronous marking and correction functions.
[0023] like Figure 1 As shown, in the first embodiment of the present invention, the high-speed scanner with synchronous marking and correction function includes a camera 1, a mounting frame 2, a projection assembly 3 and a high-speed scanner body. In this embodiment, the mounting frame 2 is an L-shaped mounting frame 2 including a crossbar 21 and a vertical bar 22. The camera 1 and the projection assembly 3 are independently mounted on the upper part of the vertical bar 22 and any point on the crossbar 21. The high-speed scanner body is set at the bottom of the vertical bar 22. The high-speed scanner body includes a base 4. The base 4 serves to set the high-speed scanner with synchronous marking and correction function so that the paper document can be photographed and the marking pattern 6 can be projected onto the paper document. In other embodiments, the mounting frame 2 can only include the crossbar 21. The camera 1 and the projection assembly 3 are independently mounted at a point on the crossbar 21. The high-speed scanner body does not include the base 4 and is directly mounted inside the crossbar 21 or at a point on the crossbar 21. The crossbar 21 is set by components such as clips so that the high-speed scanner with synchronous marking and correction function can photograph the paper document and project the marking pattern 6 onto the paper document.
[0024] In this embodiment, the high-definition camera body also includes a printed circuit board, which is electrically connected to the camera 1 and the projection component 3. The printed circuit board integrates a core processor, algorithm program firmware, storage module, interface module, and power management module. Specifically, the core processor, storage module, interface module, and power management module are all commonly used configurations. Among them, the core processor is used to implement functions such as processing data streams, executing algorithms, and scheduling software and hardware; the storage module is used to implement functions such as caching data and storing parameters; the interface module is used to connect to an external power supply, camera 1, etc., thereby implementing the input and output functions of electrical energy and signals; and the power management module is used to implement power supply and power consumption management functions. Since the structures and principles of the core processor, storage module, interface module, and power management module are mature existing technologies, they will not be described in detail in this embodiment.
[0025] Furthermore, the algorithm program firmware includes an edge detection algorithm and an OCR recognition algorithm. The image information is collected by the camera 1 and analyzed by the edge detection algorithm and the OCR recognition algorithm to generate annotation information. The projection component 3 then generates an annotation pattern 6 based on the annotation information and projects it onto the paper document. At this time, the user can paperize the paper document according to the annotation pattern 6. Compared with existing high-definition scanners, this high-definition scanner with a synchronous annotation and correction function can directly generate an annotation pattern 6 and project it onto the paper document after automatically correcting and annotating the digitized document, so that the user can paperize the paper document according to the annotation pattern 6. The user's sight and attention do not need to switch back and forth between the paper document and the electronic screen, which effectively saves the user's time and energy.
[0026] Optionally, a control button 5 is provided on the base 4, which is electrically connected to the printed circuit board. An interactive control module is also integrated on the printed circuit board. The user can control the high-speed scanner with the synchronous annotation and correction function through the control button 5 and the interactive control module to meet the user's needs for adjusting the brightness and content of the annotation pattern 6. Since the control button 5 and the interactive control module are mature existing technologies, they are not further described in this embodiment.
[0027] Optionally, the projection assembly 3 includes a projection housing, a driver IC, a light source, an imaging core, and an optical lens assembly. The projection housing is mounted on a mounting frame 2, and the driver IC, light source, imaging core, and optical lens assembly are all mounted within the projection housing. Specifically, the light source is mounted at the rear of the projection housing, the imaging core is positioned in front of the light source, and the optical lens assembly is positioned in front of the imaging core. The driver IC is electrically connected to the printed circuit board, light source, imaging core, and optical lens assembly, respectively. The annotation information generated by the high-resolution image sensor is processed by the driver IC, which then controls the light source, imaging core, and optical lens assembly to generate the annotation pattern 6, which is then projected onto the paper document. Furthermore, the projection assembly 3 includes a heat dissipation structure positioned at the light source and imaging core to dissipate heat. In this embodiment, the projection assembly 3 utilizes DLP projection technology, with the light source being an RGB LED array, the imaging core being a DLP® DMD chip, and the optical lens assembly being a Fresnel lens and an aspherical lens assembly. In other embodiments, the projection assembly 3 utilizes LCD projection technology. Since both DLP projection technology and LCD projection technology are mature existing technologies, their structures and principles are not described in detail in this embodiment.
[0028] Optionally, the algorithm program firmware also includes a coordinate mapping engine, and the driver IC also includes an electronic compensation module. Specifically, the above-mentioned camera is used to detect the position of the paper document in real time. When the paper document is displaced due to various reasons and the displacement exceeds a preset threshold, the camera 1 sends a displacement compensation signal to the printed circuit board, and then the coordinate mapping engine of the printed circuit board outputs compensation information according to the displacement compensation signal, and generates a compensated annotation pattern 6 through the electronic compensation module and the projection component 3 and projects it to the paper document. The user can continue to process the paper document according to the annotation pattern 6. This design can further improve the convenience of using the high-speed scanner. In other embodiments, the high-speed scanner with synchronous annotation and correction functions can also be connected to the network by wired and wireless means, thereby calling the resources of the cloud server, such as the computing power and other algorithms of the cloud, so as to achieve functions such as faster recognition and more accurate judgment.
[0029] like Figures 2 to 4As shown, the present invention also discloses a synchronous marking and correction method, which is implemented using the high-speed scanner with the synchronous marking and correction function as described above, and includes the following steps: S1: The user places the paper document to be processed in the projection area of the high-speed scanner, and the high-speed scanner collects image information of the paper document through camera 1; S2: The image information captured by camera 1 is transmitted to the printed circuit board and analyzed by the edge detection algorithm and OCR recognition algorithm integrated into the printed circuit board; S3: The core processor digitizes the analysis results of the edge detection algorithm and the OCR recognition algorithm and generates annotation information; S4: The annotation information is transmitted to the projection component 3 , which generates an annotation pattern 6 according to the annotation information and projects it onto the paper document. The user can process the paper document according to the annotation pattern 6 .
[0030] S5: The position of the paper document is detected in real time through camera 1. When it is detected that the displacement of the paper document exceeds the preset threshold, camera 1 sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board outputs compensation information according to the displacement compensation signal, and generates a compensated annotation pattern 6 through the electronic compensation module and projection component 3 and projects it onto the paper document. The user continues to process the paper document according to the annotation pattern 6.
[0031] In this embodiment, the OCR recognition algorithm analyzes the image information including: Text region detection, finding the location of text lines in a document image parsed by an edge detection algorithm; Text recognition: grayscale, binarization, denoising, and normalization are performed on the image within each text box, and convolutional recurrent neural network is used for recognition to obtain text; Post-processing: correcting errors in the recognized text.
[0032] Specifically, step S5 includes the following steps: S51: The position of the paper document is detected in real time by the camera 1. When the displacement of the paper document exceeds a preset threshold, the camera 1 sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board outputs compensation information based on the displacement compensation signal, and generates a compensated annotation pattern 6 through the electronic compensation module and the projection component 3 and projects it onto the paper document. S52: collecting image information of the compensated annotation pattern 6 and the corresponding paper document through the camera 1, and analyzing the image information using the edge detection algorithm and the OCR recognition algorithm to determine whether the projection position of the compensated annotation pattern 6 generated in step S51 is accurate; S53: If the projection position is accurate, the verification is completed; if the projection position is inaccurate, new compensation information is generated through the edge detection algorithm, OCR recognition algorithm and coordinate mapping engine, and then a new compensated annotation pattern 6 is generated through the electronic compensation module and projection component 3 and projected onto the paper document.
[0033] In this embodiment, the compensation information output by the coordinate mapping engine includes: Input data: the document boundary corner points output by the edge detection algorithm, the annotation target center output by the OCR recognition algorithm, and the translation amount output by camera 1 are input into the coordinate mapping engine; Transformation processing: Establish a document coordinate system based on the document boundary corner points output by the edge detection algorithm. Convert the marked target coordinates to relative positions in the document coordinate system based on the marked target center output by the OCR recognition algorithm. Superimpose the translation amount of camera 1 based on the translation amount output by camera 1, and convert the millimeter coordinates to projector pixel coordinates using pre-calibrated conversion parameters. Output compensation information, ie, projector pixel coordinates. It is worth noting that: since the principles of edge detection algorithm, OCR recognition algorithm and coordinate mapping engine are mature existing technologies, they will not be described in detail in this embodiment.
[0034] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A high-definition scanner with a synchronous marking and correction function, comprising a camera, a mounting frame, and a scanner body, wherein the camera is mounted on the mounting frame, the scanner body comprises a printed circuit board, and the printed circuit board is electrically connected to the camera; characterized in that: It also includes a projection component, which is arranged on a mounting frame. The printed circuit board is integrated with a core processor and algorithm program firmware, and the algorithm program firmware includes an edge detection algorithm and an OCR recognition algorithm. The projection component is electrically connected to the printed circuit board.
2. The high-speed scanner with synchronous marking and correction function according to claim 1 is characterized in that: The projection assembly includes a projection housing, a driver IC, a light source, an imaging core, and an optical lens group. The projection housing is disposed on a mounting frame, and the driver IC, light source, imaging core, and optical lens group are all installed in the projection housing. The light source is installed at the rear of the projection housing, the imaging core is arranged in front of the light source, the optical lens group is arranged in front of the imaging core, and the driver IC is electrically connected to the printed circuit board, the light source, the imaging core and the optical lens group respectively.
3. The high-speed scanner with synchronous marking and correction function according to claim 2 is characterized in that: The algorithm program firmware further includes a coordinate mapping engine, and the driver IC includes an electronic compensation module.
4. The high-speed scanner with synchronous marking and correction function according to claim 2, characterized in that: The projection assembly further includes a heat dissipation structure, which is arranged at the light source and the imaging core.
5. A synchronous marking and correction method, characterized in that: The method is implemented by using a high-speed scanner with a synchronous marking and correction function as claimed in any one of claims 3 to 4, including the following steps: S1: The user places the paper document to be processed in the projection area of the high-speed scanner, and the high-speed scanner collects image information of the paper document through the camera; S2: The image information collected by the camera is transmitted to the printed circuit board and analyzed by the edge detection algorithm and OCR recognition algorithm integrated in the printed circuit board; S3: The core processor digitizes the analysis results of the edge detection algorithm and the OCR recognition algorithm and generates annotation information; S4: The annotation information is transmitted to the projection component. The projection component generates an annotation pattern according to the annotation information and projects it onto the paper document. The user processes the paper document according to the annotation pattern.
6. The synchronous marking and correction method according to claim 5, characterized in that: The following steps are also included: S5: The position of the paper document is detected in real time through the camera. When the displacement of the paper document is detected to exceed the preset threshold, the camera sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board then outputs compensation information based on the displacement compensation signal, and generates a compensated annotation pattern through the electronic compensation module and projection component and projects it onto the paper document. The user continues to process the paper document according to the annotation pattern.
7. The synchronous marking and correction method according to claim 6, characterized in that: The step S5 comprises the following steps: S51: The position of the paper document is detected in real time by the camera. When the displacement of the paper document is detected to exceed a preset threshold, the camera sends a displacement compensation signal to the printed circuit board. The coordinate mapping engine of the printed circuit board outputs compensation information based on the displacement compensation signal, and generates a compensated annotation pattern through the electronic compensation module and the projection component and projects it onto the paper document. S52: collecting image information of the compensated annotation pattern and the corresponding paper document through a camera, and analyzing the image information using an edge detection algorithm and an OCR recognition algorithm to determine whether the projection position of the compensated annotation pattern generated in step S51 is accurate; S53: If the projection position is accurate, the verification is completed; if the projection position is inaccurate, new compensation information is generated through the edge detection algorithm, OCR recognition algorithm and coordinate mapping engine, and then a new compensated annotation pattern is generated through the electronic compensation module and projection component and projected onto the paper document.
8. The synchronous marking and correction method according to claim 6, characterized in that: The coordinate mapping engine outputs compensation information including: Input data: the document boundary corner points output by the edge detection algorithm, the annotation target center output by the OCR recognition algorithm, and the translation output by the camera are input into the coordinate mapping engine; Transformation processing: Establish a document coordinate system based on the document boundary corner points output by the edge detection algorithm. Convert the annotation target coordinates to relative positions in the document coordinate system based on the annotation target center output by the OCR recognition algorithm. Superimpose the camera translation amount based on the camera translation amount, and convert the millimeter coordinates to projector pixel coordinates using pre-calibrated conversion parameters. Output compensation information, i.e. projector pixel coordinates.
9. The synchronous marking and correction method according to claim 5, characterized in that: The OCR recognition algorithm analyzes the image information including: Text region detection, finding the location of text lines in a document image parsed by an edge detection algorithm; Text recognition: grayscale, binarization, denoising, and normalization are performed on the image within each text box, and convolutional recurrent neural network is used for recognition to obtain text; Post-processing: correcting errors in the recognized text.