9results about How to "High detection" patented technology

The invention discloses a self-adaptive differential event detection method for an infrared moving target, which relates to the technical field of infrared detection and infrared space, and comprises the following steps: S101, initializing a current frame and a threshold value; s102, infrared differential event detection of a self-adaptive threshold value is carried out; s103, preprocessing an infrared event frame; s104, target event feature extraction is carried out; and S105, abnormal events are removed. In order to balance a detection rate and an error triggering rate for a space-based detection background with complex change and a dark moving target observation task, the invention provides a method for adjusting an event triggering threshold value based on triggering rate feedback, self-adapting to a strong radiation background with high dynamic change, flexibly and efficiently obtaining an infrared differential event frame, reducing static background redundant information, and improving the detection efficiency. And the detection efficiency and the moving target discovery capability are improved. And furthermore, the time-space characteristics of the target event are utilized to extract the centroid coordinates of the target area, so that high detection rate and low false alarm rate are realized, and the method has real-time performance and stability and relatively high engineering application value.

The invention provides an underwater target acoustic CT three-dimensional imaging and coordinate positioning device and method, and the method comprises the steps: laying a plurality of active sound sources and hydrophones in a target water area to form an active sound source array and a hydrophone array, and carrying out the acoustic CT three-dimensional imaging and coordinate positioning according to the underwater target detection distance and imaging spatial resolution required by a task; the method comprises the following steps: selecting sound sources of different sound source levels, setting time synchronization of a plurality of sound sources and a hydrophone array, sequentially starting the sound sources according to a preset sequence, synchronously recording direct sound wave and reflected / scattered sound wave signals collected by each hydrophone, and then obtaining a three-dimensional shape image and coordinate positioning information of a target in water by using an acoustic CT three-dimensional reconstruction algorithm. Based on the scheme of the invention, the three-dimensional shape image and coordinate positioning information of the underwater target can be directly obtained, rapid early warning, identification qualification and space coordinate positioning of the underwater target are realized, the detection and identification capability of the current underwater target is greatly improved, the bottleneck in the prior art is broken through, and the method has a good application prospect.

The application belongs to the technical field of radar signal processing and imaging, and provides a differential coupling single-frequency time-varying low-quantization imaging method, which comprises receiving a SAR echo signal, constructing a single-frequency time-varying threshold signal, single-bit quantization processing of a reference channel, single-bit quantization processing of a phase shift channel, double-channel data fusion and harmonic cancellation, and imaging processing based on a synthesized signal. The application effectively reduces the quantization noise base and improves the detection capability of a SAR system on weak targets under the premise of not significantly increasing the hardware cost.

The invention relates to the technical field of deep sea resource development, in particular to a magnetic type deep sea ore collecting device which comprises a rigid pressure-resistant main frame, mechanical legs, mechanical arms, an ore processing module, a communication module, a pushing module and a positioning module. A sealed pressure-resistant cabin is arranged in the rigid pressure-resistant main frame; the mechanical legs are symmetrically installed on the two sides of the rigid pressure-resistant main frame. The mechanical arm is installed on the front end face of the rigid pressure-resistant main frame. The ore processing module is arranged along the center line of the rigid pressure-resistant main frame; the communication module is connected with the water surface support mother ship through an armored cable; the pushing module comprises a plurality of horizontal propellers and a plurality of vertical propellers; the positioning module is installed on the upper side face of the rigid pressure-resistant main frame. The device provided by the invention has the advantages of good terrain adaptability, high collection integrity, small disturbance and reliable operation, and is suitable for selective collection operation of resources in a deep sea complex environment.

The application discloses a cut-off filter based on a microstructure array, which comprises a substrate, a dielectric film and a two-dimensional grating array structure arranged on the substrate in sequence; the substrate material is a high-refractive-index material; the dielectric film material is a low-refractive-index material; and the two-dimensional grating material is a high-refractive-index material. The application further provides a preparation method of the cut-off filter based on the microstructure array. The preparation method of the cut-off filter based on the microstructure array is simple in preparation, low in cost and convenient for large-scale and batch production. Therefore, the application can be widely applied in the fields of surveying and mapping remote sensing, environmental monitoring, sensing detection and clinical image analysis.

A robust demosaic bilinear interpolation method for polarization hyperspectral imaging is presented, addressing issues such as optical system platform vibration, frame loss in acquired images, and spectral aliasing in existing technologies. The method includes acquiring a set of polarization hyperspectral images and performing robust demosaic reconstruction on them. Image I is the acquired image of the Kth spectral band, and mosaic image II is an empty matrix used as the interpolation space for image I. Horizontal values ​​are assigned to mosaic image II, and boundary conditions are applied for filling to complete the horizontal interpolation. The intensity images of the four polarization channels in different directions in mosaic image II are extracted, and vertical interpolation is performed on these polarization channel intensity images. This completes the polarization demosaic reconstruction of the Kth spectral band image. This method is applicable to suppressing image artifacts generated during reconstruction.

The present invention relates to a method and system for realizing simultaneous imaging and detection based on a coded array; wherein the method comprises: assigning a separate coded pulse signal to each radiating element of a radar array; the separate coded pulse signal enables the echo signal generated by the target reflection to be separable in time, space or frequency; or the echo signal can be separated after being decoded; when the radar is working, each radiating element of the radar array transmits its own coded pulse signal, and each radiating element receives the echo signal of the coded pulse signal transmitted by itself and other radiating elements; the echo signal received by each radiating element is collected and decoded; according to the decoded echo signal, imaging processing and signal detection processing are performed, and radar images and moving target detection results are obtained at the same time. The present invention improves the system performance of simultaneous imaging and detection of the radar, and can flexibly adjust the imaging performance and moving target detection performance.

Provided are a disease label creation device, a disease label creation method, a disease label creation program, a learning device, and a disease detection model that can create a disease label for a simple X-ray image at a low annotation cost. An information acquisition unit (28) of a first processor of a disease label creation device (10-1) acquires a simple X-ray image (1), a three-dimensional CT image (2) paired with the simple X-ray image (1), and a three-dimensional first disease label extracted from the CT image (2). A registration processing unit (30) of the first processor performs registration between the simple X-ray image (1) and the CT image (2). A disease label converter (40) of the first processor converts the first disease label into a two-dimensional second disease label corresponding to the simple X-ray image on the basis of a result of the registration by the registration processing unit (30) to create a disease label (3-1).

The present invention relates to a remote monitoring system and method for water and salt migration, the system comprising: a resistivity measuring device, a wireless transmission device, a temperature monitoring device and a data processing and visualization device; the resistivity measuring device is used to measure the apparent resistivity of the underground medium of the site; the temperature monitoring device is used to monitor and record the atmospheric temperature and the underground field temperature in real time, and is also used to fit the underground field temperature; the wireless transmission device is used to transmit the apparent resistivity and the fitted underground field temperature to the data processing and visualization device; the data processing and visualization device is used to invert the apparent resistivity to obtain the inverted resistivity, and use the fitted underground field temperature to correct the inverted resistivity to obtain the underground three-dimensional space resistivity distribution, and determine the underground three-dimensional space water and salt distribution according to the underground three-dimensional space resistivity distribution. The present invention improves the detection and interpretation accuracy of the water and salt distribution area of ​​the underground rock and soil body.