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5458 results about "Correction method" patented technology

Straightening. Another method for removing unbalance is to straighten or flatten a part along the axis of rotation. This type of correction is most commonly applied to long narrow parts such as spindles, driveshafts, and axels.

Multi-dimensional data protection and mirroring method for micro level data

The invention discloses a data validation, mirroring and error/erasure correction method for the dispersal and protection of one and two-dimensional data at the micro level for computer, communication and storage systems. Each of 256 possible 8-bit data bytes are mirrored with a unique 8-bit ECC byte. The ECC enables 8-bit burst and 4-bit random error detection plus 2-bit random error correction for each encoded data byte. With the data byte and ECC byte configured into a 4 bit×4 bit codeword array and dispersed in either row, column or both dimensions the method can perform dual 4-bit row and column erasure recovery. It is shown that for each codeword there are 12 possible combinations of row and column elements called couplets capable of mirroring the data byte. These byte level micro-mirrors outperform conventional mirroring in that each byte and its ECC mirror can self-detect and self-correct random errors and can recover all dual erasure combinations over four elements. Encoding at the byte quanta level maximizes application flexibility. Also disclosed are fast encode, decode and reconstruction methods via boolean logic, processor instructions and software table look-up with the intent to run at line and application speeds. The new error control method can augment ARQ algorithms and bring resiliency to system fabrics including routers and links previously limited to the recovery of transient errors. Image storage and storage over arrays of static devices can benefit from the two-dimensional capabilities. Applications with critical data integrity requirements can utilize the method for end-to-end protection and validation. An extra ECC byte per codeword extends both the resiliency and dimensionality.

Binocular camera-based panoramic image splicing method

The invention provides a binocular camera-based panoramic image splicing method. According to the method, a binocular camera is arranged at a certain point of view in the space, the binocular camera completes photographing for once and obtains two fisheye images; a traditional algorithm is improved according to the defect of insufficient distortion correction capacity of a latitude-longitude correction method in a horizontal direction; corrected images are projected into the same coordinate system through using a spherical surface orthographic projection method, so that the fast correction of the fisheye images can be realized; feature points in an overlapping area of the two projected images are extracted based on an SIFT feature point detection method; the search strategy of a K-D tree is adopted to search Euclidean nearest neighbor distances of the feature points, so that feature point matching can be performed; an RANSAC (random sample consensus) algorithm is used to perform de-noising on the feature points and eliminate mismatching points, so that image splicing can be completed; and a linear fusion method is adopted to fuse spliced images, and therefore, color and scene change bluntness in an image transition area can be avoided.

Galvanometer system correction device and correction method thereof

InactiveCN101804521AGood dynamic tracking abilitySolve the problem of calibration inefficiencyLaser beam welding apparatusGalvanometerCorrection method
The invention provides a galvanometer system correction device and a correction method thereof, and relates to the technical field of precision laser processing equipment. A honeycomb panel is arranged in the middle of the outer frame of a bearing platform, a base plate for corrective is absorbed on the honeycomb panel, and the vacuum chamber of the honeycomb panel is connected with a dust collector; a PSD sensor for measuring the actual output light spot center position of the laser of a galvanometer system is arranged on the vacuum absorption bearing platform; a CCD image acquisition device is arranged above the base plate for correcting, and then is provided with a light intensity regulating module and an image acquisition board card; and a visual measurement algorithm module is arranged. The invention can effectively inhibit the precision drift of the galvanometer system, improve the efficiency of the galvanometer system when in correction model updating and in real-time correction calculation operation, improve the automatic degree of equipment, reduce the labor intensity of an operator, greatly improve the processing precision of equipment, product quality and production efficiency, has simple structure and unique principle and method, and is particularly suitable for precision laser processing equipment to use.

Visual navigation method and system of mobile robot as well as warehouse system

The invention discloses a visual navigation method and system of a mobile robot. According to the method, a scene image in a scene where the mobile robot is located is acquired in real time and converted into a grayscale image; a two-dimensional code in the grayscale image is identified and decoded, and state transition information and speed change information are obtained; meanwhile, an outline center line of a stripe in the same frame of grayscale image is determined, and the offset distance and the offset angle between the outline center line of the stripe and a center line of the grayscale image are calculated; the linear velocity and the motion direction of the mobile terminal are adjusted according to the state transition information and the speed change information, and meanwhile, the angular velocity of the mobile robot is corrected in real time according to the offset distance and the offset angle. The two-dimensional code on the stripe and the scene image for correction are acquired simultaneously in the image manner, the two-dimensional code and the stripe in the same frame of image are merged, meanwhile, preset motion and real-time correction of the robot are controlled, the control and correction method can be significantly simplified, the velocity can be increased, and the system can be more stable.

Multispectral image radiation correction method based on absolute radiometric calibration

ActiveCN102901516AImprove the accuracy of quantitative inversionQuantitative inversion is accurateMeasurement devicesPhysicsCorrection method
The invention discloses a multispectral image radiation correction method based on absolute radiometric calibration, comprising the following steps: (1) conducting relative radiation correction; (2) conducting laboratory absolute radiometric calibration: constructing a laboratory radiance-image DN value look-up table of integrating spheres; (3) conducting absolute radiation correction based on the laboratory absolute calibration results: based on the laboratory radiance-image DN value look-up table, carrying out laboratory absolute radiation correction on the relative radiation correction images; (4) conducting ground calibration field on-orbit absolute radiation calibration: constructing a ground calibration field target on-orbit radiance- laboratory radiance look-up table; and (5) conducting absolute radiation correction based on the on-orbit absolute calibration results: based on the on-orbit radiance- laboratory radiance look-up table, carrying out on-orbit absolute radiation calibration on the laboratory absolute radiation correction images. According to the invention, the multispectral images are accurately converted into ground object real radiance from DN values, thus the colors of the multispectral images really reflect the ground object real spectrum characteristics, and the foundation for remote sensing quantification application is laid.

AGV robot guide deviation correction method

InactiveCN104407615AReduced probability of losing posesGuidance deviation correction method is simplePosition/course control in two dimensionsCommunications systemGeolocation
The invention relates to an AGV robot guide deviation correction method and belongs to the robot technology field. The AGV robot guide deviation correction method comprises steps that: step 1, Nth two-dimensional code label information and Nth RFID label information are employed; step 2, the Nth two-dimensional code label information and the Nth RFID label information are read and analyzed; step 3, the present geographic position of a robot is determined; step 4, a deviation state of the robot is determined, if the deviation state does not exist, the step 1 restarts; step 5, a path of the robot is adjusted to control a servo motor system for correcting a walking direction of the robot, after correction, when the robot walks to an N+1 two-dimensional code label or an N+1 RFID label, the step 1 restarts. The guide deviation correction method is applicable to AGV robot path navigation systems including multiple two-dimensional code labels, multiple RFID labels, a two-dimensional image acquisition system, an RFID reading system, a servo motor system, a communication system and an embedded industrial control board, is simple and easy to enforce, can automatically correct the walking direction of the robot and guarantees that the robot smoothly travels along a self path.

Correction method and correction system for design data or mask data, validation method and validation system for design data or mask data, yield estimation method for semiconductor integrated circuit, method for imporving design rule, mask production method, and semiconductor integrated circuit production method

InactiveUS20080003510A1Wastes in costWastes in development periodPhotomechanical apparatusSemiconductor/solid-state device manufacturingResistValidation methods
The subject invention provides a correction method for design data or mask data comprising the steps of:
    • (i) carrying out PPC of design data or mask data;
    • (ii) exposing and developing a resist with an evaluation mask including a critical pattern which becomes critical in a process, etching a circuit material using the resist having been developed, and measuring pattern sizes of the developed resist and the etched circuit material; (iii) extracting parameter numerical condition for preventing the design data or the mask data from being critical after OPC or PPC, as a rule or as a model based on the pattern sizes of the resist and the circuit material; (iv) extracting a critical pattern with a parameter not satisfying the foregoing rule or the model from the design data or the mask data; and (v) correcting the critical pattern.
With this method, the present invention provides such as a validation/correction method for design data or mask data by which a pattern which becomes critical in a process is extracted in advance so that the pattern can be corrected. Consequently, the process spec is achieved in a short period of time after OPC or process proximity effect correction (PPC).
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