13results about How to "Improve scan quality" patented technology

The invention discloses an alpha-beta light beam scanning device, and belongs to the technical field of light beam scanning, the alpha-beta light beam scanning device comprises two supporting boxes and a connecting box fixed between the two supporting boxes, supporting sleeves are fixed on the surfaces of the two supporting boxes, lifting screw rods are rotatably connected in the supporting sleeves, and guide sleeves are in threaded connection with the outer walls of the lifting screw rods; fixing boxes are fixed to the opposite faces of the two guide sleeves correspondingly, a stepping motor is installed in one fixing box, a protective shell is fixed to the output end of the stepping motor, a scanner is installed in the protective shell, a protective cover is installed on the outer wall of the other fixing box, a linear reciprocating motor is arranged in the protective cover, and the linear reciprocating motor is arranged on the outer wall of the other fixing box. And a workbench of the linear reciprocating motor is provided with two limiting rods and an electric telescopic rod. According to the alpha-beta light beam scanning device, the reconstruction error and image distortion of a scanned image can be reduced, meanwhile, the cable can be conveniently stored, and the cable can stretch out and draw back along with rotation of the protective shell.

This application relates to the field of scanner image acquisition technology, and in particular to a method and apparatus for dynamic compensation of exposure time of a reverse-side CIS sensor. The method is applied to a duplex automatic document feeder scanning system, which is equipped with independent CIS sensors for the front and back sides to achieve synchronous scanning of the front and back sides. The method includes: upon receiving a duplex scanning task instruction initiated by a user, obtaining the current relative luminous intensity of the reverse-side CIS sensor LED based on the current cumulative illumination time of the LED and a pre-stored attenuation curve model of the reverse-side CIS sensor LED; obtaining the compensated exposure time based on the current relative luminous intensity and pre-stored initial parameters of the reverse-side CIS sensor; and controlling the reverse-side CIS sensor LED to illuminate according to the compensated exposure time, thereby achieving exposure compensation and image quality maintenance of the reverse-side image during duplex scanning.

The embodiment of the invention relates to an optical scanner. The optical scanner comprises a polarizing beam splitter, a wave plate and an optical phased array chip. Wherein the polarizing beam splitter is used for dividing incident light source light into first laser with a first polarization state and non-working light with a second polarization state, reflecting the first laser and transmitting the non-working light, and the first polarization state is different from the second polarization state. The wave plate is located on the reflection light-emitting side of the polarizing beam splitter and used for receiving the first laser and emitting second laser with a third polarization state different from the first polarization state and the second polarization state. And the optical phased array chip is used for receiving the second laser and emitting reference light, and the optical phased array chip is also used for changing the emitting angle of the reference light. The embodiment of the invention further relates to a laser detection system with the optical scanner and an automatic driving vehicle applying the laser detection system.

This utility model discloses a 3D scanner with replaceable filters, comprising: an instrument body; a camera unit and a laser projection unit disposed within the instrument body, wherein the camera in the camera unit and the projection surface in the laser projection unit are both disposed on the measurement surface of the instrument body; and a supplementary lighting unit located around the camera and disposed on the measurement surface, wherein the filter unit in the supplementary lighting unit is detachably disposed at the front end of the light source assembly in the supplementary lighting unit. This utility model significantly improves the scanner's adaptability to different material surfaces and scanning quality through the design of replaceable filter units, optimizes image clarity and detail, and allows for flexible adjustment and rapid replacement of filters according to the characteristics of different materials.

This invention discloses a method for manufacturing a dental scanner head and a dental scanner head manufactured by the method. The method for manufacturing a dental scanner head includes the following steps: manufacturing a dental scanner head by plastic injection molding; shielding a portion of the internal surface of the dental scanner head using a shielding member; controlling the position so that a sandblasting gun is located inside the dental scanner head shielded by the shielding member; and spraying abrasive from the sandblasting nozzle of the sandblasting gun onto the inner surface of the dental scanner head.

The present invention discloses a method for intelligent automatic repair of three-dimensional scanning of paper documents, and relates to the technical field of document data processing. The method comprises the following steps: collecting three-dimensional scanning parameters of paper documents; performing a first performance evaluation of three-dimensional scanning of paper documents and a second performance evaluation of three-dimensional scanning of paper documents according to the three-dimensional scanning parameters of paper documents; performing comparative analysis based on the three-dimensional scanning performance evaluation results of paper documents and a preset three-dimensional scanning performance threshold of paper documents; and adjusting the three-dimensional scanning of paper documents according to the comparative analysis results of the three-dimensional scanning performance of paper documents. The present invention improves the quality of data collected by three-dimensional scanning of paper documents by evaluating and analyzing the three-dimensional scanning parameters of paper documents and adjusting the three-dimensional scanning mode of paper documents, improves the accuracy for the subsequent generation of the final three-dimensional model of paper documents, and solves the problem of low quality of data collected by three-dimensional scanning of paper documents in the prior art.

The utility model relates to the technical field of file data detection, disclose a kind of digital file data detection scanning device, including pedestal, the upper end surface of the pedestal is equipped with the covering component for covering the upper end detection environment of pedestal, scanning component for detecting scanning is installed in the covering component, the upper end surface of the pedestal is equipped with the fixed component for fixing file paper. The utility model is covered with covering box in covering component cooperation pedestal, realize the shielding of file paper, avoid the reflection of writing on paper file caused by direct sunlight, ensure scanning definition and color fidelity, can reduce the work load of scanning component photosensitive element, improve scanning efficiency and prolong hardware life, and in the process of covering box descending, under the cooperation of cleaning component, thereby wiping the surface of paper file, the dust of using clean broom to wipe file surface can effectively improve scanning quality, avoid dust particles to cause image blur or spot.

The invention discloses a file scanning method, system and device based on pre-scanning and post-processing and a medium, and the method comprises the following steps: carrying out the rapid pre-scanning of a file, and obtaining the initial image information of the file; according to image information obtained through pre-scanning, whether the brightness of the current light supplementing lamp meets the user requirement or not is judged; if the judgment result is not satisfied, the brightness of the light supplementing lamp is automatically adjusted; after the brightness of the light supplement lamp is adjusted, formally scanning the file to obtain a scanned image; performing post-processing on the formally scanned file, including definition or gray value adjustment, so as to improve the scanning quality; according to the method, whether the brightness of the light supplementing lamp meets the user requirement or not can be judged through pre-scanning, the brightness is automatically adjusted when the brightness does not meet the user requirement, and meanwhile definition or gray value adjustment is conducted on the file after scanning is completed so as to improve the file scanning quality.

The utility model discloses a character identifying and scanning device, which relates to the technical field of character identifying and scanning, and comprises a working table, one side of the working table is fixedly connected with a mounting plate, the top of the mounting plate is fixedly connected with a supporting block, a positioning assembly is arranged above the working table, a lifting assembly is arranged above the supporting block, and the lifting assembly is fixedly connected with the working table. The beneficial effects of the utility model are that through the arrangement of the positioning assembly, the reset spring and the connecting block, the two sides of a text can be conveniently positioned, and the two sides of a book can be accurately positioned, so that all characters and image information on the book can be completely captured; according to the technical scheme, a user can find the optimal focal length position more easily, it is ensured that scanned images are clear, the phenomena of blurring and distortion caused by too small paper characters, pictures and symbols are avoided, and the scanning quality of the scanner is improved.

The present application relates to the technical field of CT scanning bed boards. A device for a CT scanning bed board capable of suppressing vibration comprises a bed frame, a bed board and a boss, wherein the boss comprises two opposite side surfaces and a bottom surface; a fixed roller assembly connected to the bed frame and at least partially protruding from the top surface of the bed frame and fitting with the bottom surface; two eccentric roller assemblies connected to the bed frame and separately arranged on both sides of the boss, wherein the eccentric roller assembly is higher than the fixed roller assembly, the distance between the two eccentric roller assemblies is reduced, and downward pressure can be formed, when the bed board is supported by the fixed roller assembly along the length direction and moves to a position at a variable speed or a uniform speed, the bed board forms a vertical vibration, the eccentric roller assembly is rotated to reduce the distance between the two eccentric roller assemblies, so that the two eccentric roller assemblies are respectively pressed and fitted with the adjacent side surfaces, and under continuous rotation, downward pressure is formed on the bed board, fitting with the fixed roller assembly, and suppressing the vertical vibration of the bed board.

A support device and a medical scanning system are provided. In this support device, the support plate includes a plate portion and a docking assembly. The docking assembly includes a first docking member fixedly mounted to the plate portion and a second docking member movably mounted to the plate portion. These docking members include docking portions that are received in docking grooves of the scanning bed plate after the support plate is mounted to the scanning bed plate. The second docking member is in a first position before the support plate is mounted to the scanning bed plate; after the support plate is mounted to the scanning bed plate, the second docking member is in a second position, at least in the transverse direction perpendicular to the longitudinal direction, different from the first position. Therefore, by utilizing the aforementioned docking assembly and docking groove, the assembly alignment accuracy of the support plate and the scanning bed plate during assembly can be improved, significantly reducing the probability of skewness or misalignment of the support plate and the scanning bed plate.

The invention relates to the technical field of direct-current brushless motor driving control, in particular to a direct-current brushless motor self-adaptive driving method and system for laser radar scanning. According to the method, the feedforward compensation amount of the direct current brushless motor is calculated based on an obtained total load disturbance observation value acting on the direct current brushless motor and an obtained environment interference factor in scene feature information from laser radar point cloud data. Scene features can be extracted in real time according to point cloud data, scanning modes are intelligently switched, the laser radar scanning efficiency and the point cloud quality are improved, and closed-loop cooperation of laser radar sensing and motor driving is achieved; meanwhile, load disturbance is estimated and compensated in real time based on the extended state observer, the robustness of the system is enhanced, and high-precision tracking of the rotating speed of the motor is achieved.