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36results about How to "Make up for information loss" patented technology

Method for extracting single tree information from LiDAR point cloud in layered clustering mode

The invention discloses a method for extracting single tree information from LiDAR in a layered clustering mode and belongs to the scope of LiDAR point cloud data processing and information extraction. According to the key technical point, 1, the point cloud is horizontally layered; 2, all the layers of point cloud are classified in a k mean value clustering mode, and different attribute values are provided for all the layers of point cloud; 3, the point cloud meeting preset conditions is fused; 4, the single tree positions, the tree height, the crown breadth and other information are extracted from the point cloud with the same attribute values, and forest stand structure information is calculated through the single tree information. The method has the key advantages that extraction of floor stratum single trees is achieved, and the number of accurately extracted forest stand forests reaches 80% or above; the function of extracting the single tree information from LiDAR and calculating the forest stand structure is achieved; no excessive requirement on the point cloud density is generated, and it is proved that the point cloud of 2p/m<2> can complete relevant work. The method can be applied to the field of LiDAR inversion information, is especially suitable for the forest stand condition with the complex structure, and can accurately extract the single tree positions, the tree height, the crown breadth, the forest stand structure parameters and other relevant information.
Owner:BEIJING FORESTRY UNIVERSITY

Remote sensing image cloud detection method and device based on full convolutional neural network

The invention relates to the field of remote sensing detection, in particular to a remote sensing image cloud detection method and device based on a full convolutional neural network. The method comprises the steps of selecting an RGB waveband of a wind cloud meteorological satellite remote sensing image to construct a data set, and obtaining a training set in the data set; constructing an SP-HRNet network model, wherein the network model comprises a continuous and parallel multi-resolution sub-network, a repeated multi-scale fusion module and a depth separable convolution combination module;inputting the training set into a network model for training to obtain parameters of the network model, and forming a network parameter model; and performing remote sensing image cloud detection by using the network parameter model. According to the method and the device, the sub-networks with multiple resolutions can be kept all the time, so that information is not lost in the feature extractionprocess of the image, the network depth is deepened, the depth separable convolution is combined, the feature extraction capability of the network is improved, the detail information of a detection result is enriched, and the cloud detection precision is improved.
Owner:SHENZHEN INST OF ADVANCED TECH

Thermal head printer and process for printing substantially light-insensitive recording materials

ActiveUS20040183887A1Decrease printing speedAvoid failure of heating elementRecording apparatusDiffusion transfer processesDensitometerPower level
A thermal head printer with image-invariant printing speeds for printing a substantially light-insensitive thermographic material having a print density-driving power level characteristic, the thermal head printer comprising a transport means, one or more thermal heads each having an array of heating elements, a thermal print head drive system capable of supplying power to each of the printing elements, and a calibration means based on the print density-driving power level characteristic of the thermographic material; a process for calibrating a thermal head printer with image-invariant printing speeds, the thermal head printer comprising one or more thermal heads each having an array of heating elements connected to a power supply capable of supplying a given number of heating element driving power levels from 0 to a maximum driving power level number, corresponding to Pmax, to each heating element for printing a substantially light-insensitive thermographic material by image-wise heating the thermographic material with the heating elements, the process comprising the steps of: (i) putting the printer into a calibration mode; (ii) printing one or more step-wedges of print densities by heating the thermographic material with the heating elements at different DPLN'S; (iii) determining the optical density of each step of the step-wedge(s) of print densities with a densitometer thereby obtaining the dependence of the print density upon DPLN; (iv) deriving from the dependence, or all the dependences of the print density upon DPLN, a single smoothed dependence of the rate of change of print density, D, with DPLN, DeltaD/DeltaDPLN, as a function of DPLN for the thermographic material; (v) establishing a threshold rate of print density change per DPLN for the specific thermographic material being printed; and (vi) setting up the thermal head printer so that the threshold rate of print density increase per DPLN cannot be undercut; and a process for printing a substantially light-insensitive thermographic material with a thermal head printer comprising one or more thermal heads each having an array of heating elements connected to a power supply capable of supplying a given number of heating element driving power levels from 0 to a maximum driving power level number, corresponding to Pmax, the process comprising the steps of: calibrating the thermal head printer according to the above-described calibration process, transporting the substantially light-insensitive thermographic material past the thermal head, and image-wise heating of the substantially light-insensitive thermographic material by means of the heating elements.
Owner:AGFA NV

Glass door refrigerator with liquid crystal temperature control panel

The invention discloses a glass door refrigerator with a liquid crystal temperature control panel. The glass door refrigerator with the liquid crystal temperature control panel comprises a transformer, a rectification filter circuit, a temperature sensor, the liquid crystal temperature control panel, a drive circuit, a refrigeration executing mechanism, a clock circuit, a backup power source, a buzzer and a control unit, wherein the temperature sensor is used for monitoring temperature in real time, the liquid crystal temperature control panel is used for displaying and setting current temperature of a refrigerating chamber, the drive circuit is used for providing control signals to the refrigeration executing mechanism which is used for receiving the signals of the drive circuit and carrying out refrigerating operations, the clock circuit is used for storing temperature information, the backup power source is used for supplying power for the clock circuit in power failure, the buzzer provides confirming signals for operations, and the control unit is respectively connected with the rectification filter circuit, the temperature sensor, the liquid crystal temperature control panel, the drive circuit and the clock circuit, receives information and sends out corresponding control signals. According to the glass door refrigerator with the liquid crystal temperature control panel, the liquid crystal temperature control panel is arranged on the glass door refrigerator, and precision of temperature control is improved. Meanwhile, the glass door refrigerator with the liquid crystal temperature control panel achieves the functions of setting and storing temperature information, time information and timing startup and shutdown information, has operation tips and is extremely convenient to use.
Owner:ZHEJIANG TENGYUN REFRIGENRATION TECH
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