33 results about "SeaWiFS" patented technology

Methods and systems for measuring volume and size of features such as lesions, tumors, sores, and wounds external to animal, human and plant skin, using 3D structured light scanners are provided. These methods and systems obtain a point cloud of the scanned feature, and employ algorithms to adjust the suggested feature geometry parameters to minimize deviations of the point cloud from suggested feature geometry. Obtained geometry parameters permit the calculation of the features' sizes and volumes.

The present invention, referred to as Oasis is Automated Statistical Inference for Segmentation (OASIS), is a fully automated and robust statistical method for cross-sectional MS lesion segmentation. Using intensity information from multiple modalities of MRI, a logistic regression model assigns voxel-level probabilities of lesion presence. The OASIS model produces interpretable results in the form of regression coefficients that can be applied to imaging studies quickly and easily. OASIS uses intensity-normalized brain MRI volumes, enabling the model to be robust to changes in scanner and acquisition sequence. OASIS also adjusts for intensity inhomogeneities that preprocessing bias field correction procedures do not remove, using BLUR volumes. This allows for more accurate segmentation of brain areas that are highly distorted by inhomogeneities, such as the cerebellum. One of the most practical properties of OASIS is that the method is fully transparent, easy to implement, and simple to modify for new data sets.

A new processing capability for desert dust enhancement using imager data from the Sea-viewing Wide Field of View Sensor (SeaWiFS) has been developed for Naval meteorology/oceanography (MetOc) operations support. The data are captured via direct broadcast high-resolution picture transmission (HRPT) at Navy Regional Centers in Rota, Bahrain, and Yokosuka, and processed at the Naval Research Laboratory in Monterey. The raw data are calibrated, corrected for missing lines and clutter, corrected for molecular scatter contamination, and enhanced through multispectral combination to yield value added products. The processing has been automated completely such that products, generated upon receipt of data, are hosted upon a password protected website typically 60 to 90 minutes from time of initial capture. This invention summarizes the SeaWiFS instrument capabilities, the protocol followed for automated near real-time processing, a physical basis for the NRL enhancements, and specific examples of the products with extension to over-land dust enhancement as enabled by MODIS. It closes with a glimpse of the potential utility of these products from the perspective of the warfighter.

The invention relates to a no-allowance installing method for a marine large equipment base. The installing position of the equipment base on a deck is measured by a full-station scanner, coordinate system transformation is conducted through gauge points, measured point cloud data are matched with a design model, slicing is conducted on the point cloud data with base webs and a bracket plane, anddata of an installing allowance line for butt joint of the lower end of the base and the deck are calculated; according to the installing allowance line obtained through calculation, allowance cuttingis conducted on all webs and brackets at the lower end of the base; and finally the no-allowance base is directly located and installed, and base welding work is completed after a base panel is retested and the effect that flatness meets precision requirements is determined. Through the no-allowance installing method, the problem of the influence of deck flatness error on base installation is solved effectively, an installing intersecting line at the lower end of the large equipment base can be measured precisely, and precise cutting of the installing allowance is conducted once.

The invention provides a deflection-angle measuring method and system for installing a laser scanner on a port shore bridge and aims at changing the situation that the existing operation process for detecting and adjusting the installation angle of the laser scanner is tedious and wastes time and labor. The detection system is characterized in that after the scanner is primarily installed and theinstallation angle is adjusted properly, a sea-side crossbeam and a land-side crossbeam of the shore bridge are respectively provided with a reference object; when the scanner is disassembled and needs to be reinstalled, secondary installation and angle adjustment of the scanner can be finished in a very-simple and assisting manner, installers adjust the installation angle of the scanner, assistants observe whether the reference objects preinstalled on the sea-side crossbeam and the land-side crossbeam of the shore bridge can be scanned simultaneously on a graphic interference, and if the twopreinstalled reference objects can be scanned simultaneously, the work for adjusting the installation angle of the scanner is ended.

The invention discloses a field real-time calibration method for a shipborne marine and submarine integrated measurement system and belongs to the technical field of marine surveying and mapping. The method is implemented on the basis of acquisition of overall coarse calibration parameters of the shipborne overwater and underwater integrated measurement system and fine inspection parameters of a laser scanner. The measurement data of the laser scanner after fine inspection can be taken as accurate space point cloud data of a marine calibration target object, multi-beam measurement data and measurement data of the laser scanner are compared on this basis, the offset and the rotation angle of a multi-beam depth finder coordinate system obtained through coarse calibration relative to an inertial navigation system coordinate system are taken as initial values, accurate corrected values of the offset and the rotation angle of the multi-beam depth finder coordinate system relative to the inertial navigation system coordinate system are acquired, and overall correction of the measurement system is realized. According to the method, the laser scanner and a multi-beam depth finder are integrated, data of submarine topography and nearshore overwater topography can be acquired simultaneously, and the shipborne multi-sensor measurement system can be corrected in real time in the field.

A system including confocal and triangulation-based scanners or subsystems provides data which is both acquired and processed under the control of a control algorithm to obtain information such as dimensional information about microscopic targets which may be “non-cooperative.” The “non-cooperative” targets are illuminated with a scanning beam of electromagnetic radiation such as laser light incident from a first direction. A confocal detector of the electromagnetic radiation is placed at a first location for receiving reflected radiation which is substantially optically collinear with the incident beam of electromagnetic radiation. The system includes a spatial filter for attenuating background energy. The triangulation-based subsystem also includes a detector of electromagnetic radiation which is placed at a second location which is non-collinear with respect to the incident beam. This detector has a position sensitive axis. Digital data is derived from signals produced by the detectors. In this way, data from at least one triangulation-based channel is acquired in parallel or sequentially with at least one slice of confocal image data having substantially perfect temporal and spatial registration with the triangulation-based sensor data. This allows for fusion or further processing of the data for use with a predetermined measurement algorithm to thereby obtain information about the targets.

The invention discloses an underwater three-dimensional scanner and a control method thereof. The underwater three-dimensional scanner comprises an upper computer, a sealed cabin, a line laser, an illumination module, an imaging module, an attitude sensor and a communication module, wherein the line laser, the illumination module, the imaging module, the attitude sensor, and the communication module installed in the sealed cabin. The line laser, the illumination module, the imaging module, and the attitude sensor are connected with the upper computer through the communication module. The underwater three-dimensional scanner is reasonable in structure and simple in operation, and three-dimensional reconstruction information of the underwater target object can be obtained rapidly.

The invention discloses a method for ship-borne integrated measurement system precision calibration in a water pool, and belongs to the technical field of marine surveying and mapping. The method is implemented on the basis of acquiring the overall coarse calibration parameters of a ship-borne multi-sensor measurement system and the precision calibration parameters of a laser scanner. On the basis that precision-calibrated laser scanner measured data can be used as accurate spatial point cloud data of a target object, multi-beam measured data and laser scanner measured data are compared. By taking the offset and rotation angle of a multi-beam depth finder coordinate system relative to an inertial navigation system coordinate system obtained through coarse calibration as initial values, the accurate corrected values of the offset and rotation angle of the multi-beam depth finder coordinate system relative to the inertial navigation system coordinate system are obtained. Thus, overall measurement system calibration is realized. According to the invention, the laser scanner and the multi-beam depth finder are integrated, the submarine topography and coastal water terrain data can be acquired at the same time, and overall precision calibration of the ship-borne multi-sensor measurement system in a water pool is realized.

The invention discloses a multi-source scanning type cast-in-situ bored pile expanded head contour scanning device which comprises a depth encoder and an in-hole probe, and an upper shell and a lower shell of the in-hole probe are connected through a calibration communication rod. A conical surface reflection type fixing support, a laser scanner, a sonar scanner and a conical reflector are sequentially installed below the upper shell, a liquid sensor is installed above the lower shell, and an electronic compass and a camera are sequentially installed above the liquid sensor. The upper shell is connected with the industrial personal computer through a transmission tension cable and a depth encoder in sequence. The invention further discloses a multi-source scanning type cast-in-situ bored pile expanded head contour scanning method, the problem of high-precision measurement of the cast-in-situ bored pile hole expanded head is solved, and three-dimensional visual visualization of the cast-in-situ bored pile hole expanded head is synchronously achieved. The method and the device are novel in conception and easy to implement, are a new method and a new-generation device of the technology for measuring the expanded head of the cast-in-situ bored pile, and have wide application prospects.

By implementation of an optical scanner, the calibration of printheads of a printing mechanism may be performed in a relatively short period of time as compared to known techniques. In one respect, the time required to perform the calibration may be substantially reduced by virtue of the relatively wide field of view of the optical scanner. The relatively wide field of view generally enables for the scanning of test patterns to be performed with a relatively fewer number of scanning passes, thus reducing the time required to perform the scanning operations as well as the calibration operations. In addition, the scanning operations may yield relatively more accurate results as compared to known scanning operations. In one respect, optical scanners are capable of detecting smaller drops of ink on print media by virtue of their higher resolution capabilities. In another respect, all of the printed colors may be accurately detected through implementation of a red, green, blue (RGB) charge coupled device (CCD) contained in the optical scanners.

Based on the sea surface temperature data provided by a satellite ground station and satellite remote sensing chlorophyll data provided by NASA/GSFC/SeaWIFS, the invention studies the horizontal distribution features of sea surface temperatures, and the spatial distribution and temporal and spatial variations of sea-water chlorophyll of the South Yellow Sea area from April to June in 2006 by taking advantage of the algorithms of MCSST and the like, and a space visualization method of the isoline analysis of a remote sensing software Surfer while combining the natural environment features of the South Yellow Sea. The invention investigates and studies the distribution conditions of the catches of Scomberomorus sierra and pomfret, makes a quantitative study of the relations between the catches of the Scomberomorus sierra and the pomfret and ocean environment elements. The main research results provided by the invention include the suitable water temperatures for the Scomberomorus sierra and the pomfret and ranges of chlorophyll concentration as well as the correlation between the temperatures and the ranges.

The invention belongs to the technical field of terrain measurement, and provides an assembled seabed model elevation measurement device suitable for a small wave water tank. The device comprises a sliding rail, a cross beam, a horizontal distance measuring module and a vertical distance measuring module, wherein the horizontal distance measuring module is used for measuring the distance from a reflector, a motor mounted on the horizontal distance measuring module is used for driving the horizontal distance measuring module to move; meanwhile, the horizontal distance measuring module also plays a role in mounting the vertical distance measuring module; the sliding rail is used for installing and fixing a sliding bearing set; the vertical distance measuring module is used for placing a laser range finder and a radar scanner; and bolt supporting legs of the cross beam are used for guaranteeing that the sliding rail is always horizontal. The device can realize measurement of a physical model experiment in a small wave water tank, and effectively improves the efficiency of data measurement in the water tank experiment. The beach surface evolution, the structure action and the like under the action of waves can be evaluated through measurement data results, and necessary bases are provided for coast engineering design and construction.

The invention relates to the technical field of submarine mining, in particular to a high-precision networked navigation system for submarine mining, which comprises at least one water surface navigation platform, mine car pilots with the same number as mining cars, pilot positioning terminals and umbilical cables, the water surface navigation platform comprises a wave glider body, a satellite positioning device and an underwater acoustic navigation node, wherein the satellite positioning device and the underwater acoustic navigation node are arranged on the wave glider body. And the mine car navigator is provided with an underwater acoustic positioning terminal, an inertial assembly, a navigator positioning node, an optical scanner, a high-frequency imaging sonar, a Doppler log, an obstacle avoidance sonar and an underwater vehicle platform. According to the invention, all-weather and all-time seabed mining navigation service can be realized.