38results about How to "Guaranteed scan quality" patented technology

The invention discloses a flattening method of a deformed page. The flattening method comprises the following steps of: acquiring a matching point set from a left image or a right image; acquiring a corresponding point set from a right view or a left view through the matching point set and a digital image related method; concentrating a corresponding point of any one point A in the matching point set into an A'; acquiring a three-dimensional coordinate of the A through a binocular vision principle by utilizing two-dimensional coordinates of the A and the A' in the left image and the right image; determining an undetermined parameter in a page curve surface parameter equation through the three-dimensional coordinate of a matching point concentrated point and a fitting method; acquiring a flattened plane coordinate of any point of a page curve surface through the flattening method; acquiring a corresponding relation between gray level distribution on a space curve surface and gray level distribution of a flattened plane according to a corresponding relation between the space curve surface and a point on the flattened plane; and calculating a flattened image point by point. The method disclosed by the invention corrects character torsion and the corrected character is the same as a shot character when the page is flatly placed; and the scanning speed of a book is improved.

An automatic dust-removing filmscanner comprises a scanner body, a film holder and a dust-removing element. The scanner body has a film-scanning platform and an image-capture module thereinside and has a slot on the surface thereof. The dust-removing element is installed in the film holder. When the film holder is inserted into the slot to locate the film over the film-scanning platform and enable the image-capture module to retrieve the image data recorded on the films, the dust-removing elements on the film holder simultaneously cleans the film-scanning platform. Therefore, the automatic dust-removing filmscanner not only retrieves image data but also automatically cleans the film-scanning platform at the same time without dismantling the scanner body to maintain the scanning quality.

The invention discloses a human body 3D scanning rotation speed self-adaptive control system and a control method thereof. The human body 3D scanning rotation speed self-adaptive control system comprises an MCU chip, a turntable motor driving module, a Hall speed measuring sensor, a power supply module and a turntable motor, wherein the MCU chip is connected with the turntable motor driving module; the Hall speed measuring sensor and the turntable motor are each connected with the turntable motor driving module; and the Hall speed measuring sensor is connected with the MCU chip to form a closed-loop control system. The control method comprises the steps that: the MCU chip presets a turntable rotation speed preset value; the MCU chip sends a command to the turntable motor driving module; the turntable motor rotates at a constant speed of the preset value; a human body stands on a rotating turntable; the Hall speed measuring sensor senses variation of rotation speed of the turntable; the MCU chip calculates a deviation value according to a feedback signal to form a turntable motor power changing amount; and the turntable motor driving module controls power of the turntable motor. The human body 3D scanning rotation speed self-adaptive control system and the control method thereof shorten the corresponding time between the rotation speed change value to the preset value, and avoid the turntable from affecting scanning quality due to rotation speed variation.

The embodiment of the invention provides a method and a device for scanning an article to be scanned, a storage medium and an electronic device. The method comprises the steps of obtaining a target material of the article to be scanned, wherein the target material is used for indicating components of the article to be scanned; generating a target light beam matched with the target material; and scanning the article to be scanned by using the target light beam to obtain a scanned article with the scanning quality higher than the target scanning quality. According to the method and the device for scanning the article to be scanned, the storage medium and the electronic device, the problem that the scanning quality of the article to be scanned is low in the prior art is solved, and the effect of improving the scanning quality of the article to be scanned is achieved.

The invention discloses a scanning auxiliary tool automatically adaptive to a book archive. The scanning auxiliary tool comprises a V-shaped frame component and a book supporting plate component, wherein the book supporting plate component is arranged below the V-shaped frame component; the book supporting plate component can be moved on a horizontal direction; the V-shaped frame component can be moved along a perpendicular direction of the movement direction of the book supporting plate component; the V-shaped frame component can be inserted into the book supporting plate component in a perpendicular movement process; and the V-shaped frame component and the book supporting plate component are close and are parallel. The tool is simple in structure; by designing the reasonable structure, no matter how thick the book archive is or how high a binding line is, a scanner can carry out automatic scanning clearly and completely on the premise of not damaging a to-be-scanned material; the scanning quality is guaranteed, and the safety of a book is ensured.

The invention discloses a laser scanning galvanometer performance detection method, and the method comprises the specific steps: enabling a system to be powered on, forming a linear light source, enabling the linear light source to irradiate a galvanometer, and enabling the linear light source to irradiate a photosensitive surface of a detector after reflection and focusing through a focusing lens; defining a working zero point; determining a scanning frequency, an average frequency and a scanning period according to the time elapsed by three adjacent working zero crossing points; determininga linear segment time utilization rate according to the percentage of the obtained linear segment experience time in the scanning period; calculating an average value of the obtained effective swing angles of the linear segments to obtain effective swing angles of the linear segments; according to the working characteristics of the detector and the ratio of the distance between adjacent sampling points to the elapsed time, obtaining the instantaneous speed and the average speed, and calculating the maximum speed deviation. The invention provides a method for detecting the performance of a laser scanning galvanometer, and the method can improve the imaging stability, guarantees the uniformity of a swing angle, and achieves the precise measurement of dynamic scanning parameters.

The invention discloses an oral cavity scanning device based on an optical coherence tomography principle. Based on the optical coherence tomography principle, interference spectrum signals generatedby convergence of backscattered light of tissues with different depths and a reference light beam are detected, and parallel detection of depth information is realized through inverse Fourier transform. Longitudinal tomography capacity and horizontal screening function are combined, the invention provides the oral cavity scanning device which can realize real-time reconstruction of a digital oralcavity three-dimensional model being complete in data and high in resolution ratio under the non-ionizing radiation and non-intruding conditions. Compared with a traditional impression technology, complete digitization is achieved, the material cost and the operation time are saved, the comfort level of a patient and the model quality are improved, and the digitized model is convenient to store, transmit and analyze. The digital oral impression device has the beneficial effects that the existing digital oral impression technology does not have.

The invention provides a light source light emitting module which comprises a wafer, a support and a printed circuit board, wherein the wafer is connected to the support, the wafer comprises a red light wafer, a green light wafer, a blue light wafer and an infrared light wafer, and the support is connected with the printed circuit board. Due to the fact that the infrared light wafer is additionally arranged based on the arrangement of the red light wafer, the green light wafer and the blue light wafer, the application range of the light source light emitting module is wider. The light source light emitting module can be used on scanning equipment made of materials sensitive to infrared light such as a currency detector.

The invention discloses a book file scanning light compensating method and device. The device comprises a V-shaped frame assembly. A reflecting mirror assembly is arranged in the V-shaped frame assembly. A light compensator is mounted on the reflecting mirror assembly. The light compensator mainly comprises a mounting strip and lighting instruments. The mounting strip is bended along a center line to form a V-shaped structure. The lighting instruments are symmetrically arranged on the bottom surface of the mounting strip along the center line of the mounting strip. The mounting strip and the lighting instruments are both arranged above the reflecting mirror assembly. The ends of the lighting instruments form included angles of 45 degrees or 135 degrees with the mirror surface of a reflecting mirror arranged in the reflecting mirror assembly. According to the device and the method, book files needing to be scanned are irradiated vertically by mounting the light sources of the lighting instruments above the reflecting mirror; the light intensity is improved; the shadows or ghosting on the pages can be removed; and the scanned file images are clearer.

The invention discloses a scanning method. According to the drop location of a scanned original copy and width of an area to be scanned, a sensitive unit in a photoelectric conversion component is divided into a front section, a middle section and a rear section; after the photoelectric conversion component carries out photelectric conversion on the received light ray, only exposure voltage signals which are generated in the sensitive unit positioned at the front section and the middle section are output, thus the time of signal output by the photoelectric conversion component is shortened, and on the premises of ensuring the scanning quality, the scanning time is shortened. The invention also discloses a scanning device and a scanner.

The invention discloses an anti-vibrating image scanning device. The anti-vibrating image scanning device comprises a manuscript arrangement table, a contact-type image sensor, a frame, a connecting component, a driving component, a temperature control device and a control circuit board, wherein the manuscript arrangement table is used for arranging to-be-scanned manuscripts and comprises a box body and a glass plate, and a metal plate is arranged in the box body; the contact-type image sensor image sensor is used for obtaining characters and/or images in the to-be-scanned manuscripts; the frame is disposed in a box body, and the contact-type image sensor is disposed on the frame; the connecting component comprises a strip-shaped main sliding chute and a sliding block, and card clothing is paved on the bottom of the main sliding chute; the driving component comprises a rack, a gear, a driving motor and an electromotive push rod, all of which are disposed in the box body; the temperature control device comprises a temperature sensor, a fan and a single chip computer; the control circuit board is electrically connected with the contact-type image sensor, the driving motor and the electromotive push rod and controls on and off of the contact-type image sensor, the driving motor and the electromotive push rod. The anti-vibrating image scanning device disclosed by the invention not only has a simple structure and stable performances, but also has high scanning quality.

The invention provides an automatic paper feeding scanning device. The automatic paper feeding scanning device includes an automatic paper feeding device and a flatbed scanner. The platform scanner includes a housing, a scanning module and a scanning platform, and the scanning platform has a first scanning window and a second scanning window, which are used to fix the first light-transmitting plate and the second light-transmitting plate respectively, wherein the second scanning window The inner edge is complementary to the side edge of the second transparent plate. The present invention has the advantages of preventing the scanning module from being impacted while moving and preventing dust from falling into the housing.

The invention discloses a spiral scanning method for terahertz wave beam alignment, and the method comprises the steps: firstly estimating an area where the terahertz signal intensity distribution is relatively large; setting a starting point in the area; enabling a receiver to carry out coarse scanning at the starting point spirally outwards until the power of a received terahertz signal is greater than a certain threshold value; and continuously increasing the spiral scanning precision to obtain a considerable power value after the coarse scanning is finished; and searching for the maximum power point meeting the precision by using an optimized hill climbing method in a fine scanning stage. According to the method, the spiral scanning algorithm with low time cost is used, the maximum power point of the terahertz signal is determined through the optimization algorithm, unnecessary scanning paths are reduced, the implementation method is simple and convenient and low in cost, and natural light irradiation experiments prove that the scanning quality can be guaranteed.

Focus-adjustable mobile phone scanning bracket, includes horizontally arranged rectangular support plates, the top of the rectangular support plate is provide with a rectangular groove capable of holding A4 paper, The rear side of the rectangular frame is hinged with a transparent cover plate for covering the rectangular groove through hinges, the right front side of the transparent cover plate isprovided with a handle, the left middle part of the rectangular support plate is vertically provided with a lifting bar, the upper end of the lifting bar is provided with a horizontal telescopic barlocated directly above the transparent cover plate, and the right end of the horizontal telescopic bar is provided with a mobile phone clip. The invention has the advantages of reasonable design, simple structure, convenient operation, quick adjustment of focal length, especially suitable for mass scanning operation, strong stability and guaranteed scanning quality.