83results about How to "Improve dynamic range" patented technology

The invention provides a single particle diffusion quantitative feature prediction method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a target input image corresponding to a target single particle; based on a pre-trained particle trajectory prediction model, according to the target input image, predicting to obtain a particle pseudo trajectory image; on the basis of the particle pseudo-trajectory image, diffusion quantitative characteristics of the target single particle are calculated; wherein the particle trajectory prediction model is obtained by performing training optimization according to a first training sample set formed by the single-particle motion blurred image and the corresponding particle motion trajectory image. According to the method, the actual movement path of the target single particle is predicted from the target input image through the particle trajectory prediction model, and the diffusion quantitative characteristic of the target single particle is calculated based on the actual movement path, so that the diffusion coefficient of a large number of single particles can be rapidly and accurately predicted in a high-mark-density environment, and the phototoxicity is remarkably reduced; diffusion characteristics of different biological particles can be effectively distinguished, and a powerful tool is provided for dynamic research of particles in a diffusion system and living cells.

The invention provides an aerial image detail enhancement method based on deep learning. The aerial image detail enhancement method comprises the following steps: constructing a cyclic convolutional neural network with a memory state; the cyclic convolutional neural network with the memory state comprises a denoising network, an event reconstruction image network and a fusion network; in a low-illumination scene, a low-quality video frame sequence VL * and a low-quality event stream FL * of a target area are acquired respectively in each acquisition period through a visual camera and a common camera, the low-quality video frame sequence VL * and the low-quality event stream FL * are input into the trained cyclic convolutional neural network with the memory state, a reconstructed first high-quality video frame sequence VHR1 * is output, and a reconstructed second high-quality video frame sequence VHR2 * is output; the video frame sequence is a finally obtained video frame sequence after image detail enhancement. According to the model designed by the invention, the high dynamic range information of the event stream data and the high texture detail information of the image frame sequence data are utilized at the same time, and the visual perception enhanced image with the high dynamic range and the high texture detail information at the same time can be constructed through fusion.

The invention provides an image sensor and a readout circuit thereof, the readout circuit of the image sensor comprises a ramp voltage circuit, a comparison circuit, a counter circuit, a storage circuit and a negation control circuit, the image sensor circuit quantizes a reset signal into a first digital code value in a reset sampling period and stores the first digital code value; in the first exposure sampling period, the first pixel pulse signal is quantized on the basis of the second digital code value to realize correlated double sampling, and in the second exposure sampling period, the second pixel pulse signal is quantized on the basis of the fourth digital code value to realize correlated double sampling. The second digital code value and the fourth digital code value are negation values corresponding to the first digital code value, in the whole quantization process, quantization of two pixel pulse signals can be completed only by quantizing the reset signal once, the pixel signal time division multiplexing counter circuit read out twice and one set of reading circuit, and the quantization efficiency is improved. The structure of the image sensor is simplified, and power consumption is reduced.

The utility model describes a pixel circuit and a pixel array of an image sensor, and the pixel circuit comprises a first photosensitive unit which is configured to receive an optical signal in a first exposure duration so as to generate a first image signal; a first floating diffusion node connected to the first photosensitive unit; the first transfer transistor is connected between the first photosensitive unit and the first floating diffusion node; the gain control circuit is connected with the first floating diffusion node so as to collect a second image signal generated under a second exposure time length and collect a third image signal generated under a third exposure time length, and the second exposure time length is smaller than the first exposure time length and smaller than the third exposure time length; the gain control circuit at least stores the third image signal in the overflow unit and then outputs the third image signal; the reset circuit is connected between the gain control circuit and the first power supply voltage; the readout circuit is connected to the first floating diffusion node. According to the pixel circuit, the dynamic range can be enlarged, and the problem of motion artifacts is solved.

The invention provides a radar ranging method and device, electronic equipment and a computer readable storage medium, and relates to the technical field of radars, and the method comprises the steps: obtaining a plurality of measurement data sets obtained through the sampling of at least one echo signal in a measurement period based on a plurality of threshold values; wherein the echo signal is sampled based on a threshold value to obtain a measurement data set, and each measurement data set comprises at least one piece of measurement data; determining M pieces of alternative data and N pieces of auxiliary data in the plurality of measurement data sets, and obtaining the total composite degree of each piece of alternative data; wherein M and N are positive integers, and the sum of M and N is equal to the total number of measurement data contained in the plurality of measurement data sets; determining target data from the M pieces of alternative data according to the total composite degree; and determining a measurement distance according to the target data. According to the invention, the dynamic range of the laser radar system can be improved, so that the measurement precision of the laser radar is improved, and the close-range detection blind area of the laser radar is shortened.

The invention discloses a quantitative laser speckle blood flow imaging method based on a neuromorphic visual sensor, and relates to the technical field of biomedical engineering. The method solves the problem that static scattered light caused by physiological behaviors and electronic noise of imaging equipment have adverse effects on blood flow imaging quality in a traditional laser speckle contrast imaging method, and comprises the following steps: step 1, using a helium-neon laser as a light source, and irradiating a scattering medium with an expanded laser beam to form a speckle pattern; 2, a microfluidic injector is adopted, two parameters of the inner diameter and the flow of the injector are set, and the flow speed range is controlled; 3, asynchronously sensing the change of the light intensity of the speckle pattern by using an event camera, and shooting the speckle pattern by using a frame camera; and 4, acquiring event stream data by the event camera, and processing the data by using an algorithm. Real-time and high-resolution blood flow imaging and flow velocity calculation are achieved, and the inherent limitation of a traditional method is overcome.

The invention discloses a pixel and an image sensor, and relates to the technical field of image sensors, and the pixel comprises a light sensing unit which is used for sensing light to generate charges; the transmission unit is used for transmitting charges generated by the photosensitive unit to the floating diffusion node; the reset unit is used for resetting the pixels; the amplification unit is used for amplifying and outputting the voltage of the floating diffusion node to the storage unit; the storage unit is used for storing reset voltage and signal voltage; the switching unit is used for switching the exposure mode of the pixel and switching the conversion gain of the pixel in the exposure mode; the exposure mode comprises a global exposure mode and a roller exposure mode; the output unit is used for outputting reset voltage and signal voltage. The pixel supports global exposure and roller exposure, and supports a high dynamic range in a global exposure mode and a high dynamic range in a roller exposure mode.

This invention discloses an all-weather autonomous road defect detection method and system, relating to the field of computer vision. It includes a hybrid vision sensor for all-weather autonomous road defect detection mounted on an unmanned vehicle (UAV). The hybrid vision sensor is equipped with a computing unit, which runs a hybrid vision road defect recognition and localization algorithm. The hybrid vision in the UAV sensor includes traditional RGB vision and DVS pulse vision. The traditional RGB vision is used to detect the texture details of the road, while the DVS pulse vision is used to detect road anomalies at high speeds. By utilizing the rich texture details of RGB and combining the sensitive response of DVS vision to low light and dynamic lighting changes, the accuracy of road defect detection is improved. This invention features real-time asynchronous response, high dynamic range, information capture capability in low-light scenarios, and reduced motion blur.

This invention discloses a high-output-swing, wide-supply-voltage integrator suitable for sigma-delta modulators, belonging to the field of integrated circuit design technology. The integrator includes a reference voltage generation module connected to a reference current generation module and a voltage buffer module. The reference current generation module is connected to a bias circuit module. The voltage buffer module is connected to a fully differential switched-capacitor integrator module and a common-mode feedback circuit module. The fully differential switched-capacitor integrator module is connected to a fully differential operational amplifier module and a common-mode feedback circuit module. The bias circuit module is connected to the fully differential operational amplifier module and the common-mode feedback circuit module. The fully differential operational amplifier module is connected to the common-mode feedback circuit module. This invention provides a high output swing and a stable common-mode operating point over a wide supply voltage range, contributing to improved dynamic range and versatility of the modulator.

This invention provides a visual sensor chip, comprising a pixel array composed of pixel units; wherein each pixel unit has a corresponding temporal difference path and a spatial difference path, or a corresponding intensity path, a temporal difference path, and a spatial difference path. This invention integrates the dual-path characteristics of the human visual system into existing visual sensor chips, thereby significantly improving the chip's ability to perceive spatiotemporal dynamic information and achieving high-precision, high-frame-rate, high-dynamic-range, and highly efficient and robust visual representation.

The invention relates to the technical field of biological detection, in particular to a kit and method for detecting NfL, the kit comprises a magnetic bead coated with a capture antibody, a non-functional auxiliary magnetic bead, an NfL detection antibody coupled with a first marker, beta-galactosidase coupled with a second marker, an enzyme reaction luminescent substrate and an NfL standard substance; the capture antibody in the magnetic bead coated with the capture antibody is used for being specifically combined with an NfL antigen; the first marker in the NfL detection antibody coupled with the first marker is connected with the second marker in the beta-galactosidase coupled with the second marker, and the NfL detection antibody is suitable for being specifically combined with an NfL antigen. The kit provided by the invention has the advantages of higher sensitivity, less background signal interference, wider linear range, convenience for full-automatic detection instruments and the like.

The invention provides a transparent material parameter measuring method and a transparent material parameter measuring system, which are used for solving the technical problems of large signal interference, low signal-to-noise ratio and the like of the existing non-contact measuring method. The measuring method comprises the following steps: 1, preparing a sample to be measured; 2, respectively dividing a bullet-facing surface and a non-bullet-facing surface of the to-be-detected sample into film coating areas, reserving a transparent area penetrating through the axial direction of the to-be-detected sample between the two film coating areas, and then respectively coating a layer of metal reflective film in each film coating area; 3, at least one PDV probe is arranged at the position, not affected by the side sparse waves, in the coating area of the non-bullet-facing face, at the position, not affected by the side sparse waves, in the non-coating area of the non-bullet-facing face and one end of the non-bullet-facing face of the transparent area respectively; and 4, impacting the to-be-tested sample from the bullet facing surface along the axial direction through the light-gas gun flat plate impact experiment device, respectively acquiring particle speed signals at corresponding positions and speed signals of the flyer by each PDV probe, and further calculating to obtain the flatness and the wave velocity of the to-be-tested sample.

Systems and methods for rectangular optical fibers within a projection system. A projection system includes a rectangular optical fiber and a first modulator. The rectangular optical fiber is configured to emit light in response to image data. The rectangular optical fiber has a first aspect ratio. The first modulator is configured to receive light from the rectangular optical fiber and apply spatial variation modulation to the light to steer the light and generate first steered light. The first modulator has a second aspect ratio.

The present invention relates to the field of optical technology, and in particular to a backlight detection system and a pixel-level light field modulation method thereof, wherein the system comprises a main optical system, a polarization beam splitter, a relay lens group, a visible light detector, a pixel-level polarization light field modulator, a polarization detector and a high-dynamic fusion component, wherein the radiation energy collected by the main optical system is incident on the polarization detector and the pixel-level polarization light field modulator respectively through the polarization beam splitter, the polarization detector acquires a polarization image, the radiation energy output by the pixel-level polarization light field modulator is imaged to the visible light detector in turn through the polarization beam splitter and the relay lens group to obtain a visible light image, the polarized visible light image is sent to the high-dynamic fusion component for detection target recognition and motion trajectory prediction, the pixel-level polarization light field modulator is modulated according to the detection target recognition and motion trajectory prediction results, so that the background radiation energy is reflected out of the backlight detection system along the original path. The present invention realizes high-precision target recognition of the detection target.

The invention discloses an image processing method and device and electronic equipment, and belongs to the technical field of images. The image processing method comprises the steps of inputting an RGB image and corresponding event camera data into a feature extraction module of an image processing model, performing feature extraction on the RGB image and the event camera data, and outputting image feature data and brightness change feature data; inputting the image feature data and the brightness change feature data into a cross-modal channel attention mechanism module, performing feature fusion processing on the image feature data and the brightness change feature data, and outputting fused feature data; inputting the image feature data and the fused feature data into a coding and decoding module, performing feature splicing extraction on the image feature data and the fused feature data, and outputting spliced feature data; and inputting the RGB image and the splicing feature data into a fusion module, and performing fusion processing on the splicing feature data and the RGB image to obtain a deblurred image of the RGB image.

The invention belongs to the related technical field of optical information measurement, and discloses an optical field wavefront measurement module and method based on an integrated photon chip. The measurement module is arranged on the integrated photon chip and comprises a coupling unit, a transmission waveguide and a photoelectric detector, and the coupling unit is used for receiving wavefront to be measured and coupling the wavefront to be measured to the transmission waveguide; the periphery of the coupling unit is connected with transmission waveguides, the periphery comprises a transverse forward direction and a transverse reverse direction and a longitudinal forward direction and a longitudinal reverse direction, the tail end of each transmission waveguide is connected with a photoelectric detector, and the transmission waveguides are used for transmitting optical signals on the coupling unit to the photoelectric detectors; the photoelectric detector is used for measuring the light intensity of the optical signal from the transmission waveguide. According to the invention, high-resolution and high-dynamic-range wavefront measurement is realized.

The invention provides a large dynamic range micro-optical accelerometer. The accelerometer is composed of an optical transceiver module, a beam splitting and combining module, an MEMS sensitive unit and a packaging substrate, the optical transceiver module is composed of a laser and a plurality of detectors, the beam splitting module is composed of a diffraction grating, the MEMS sensitive unit is composed of a spring-mass block with a reflector, and the packaging substrate is composed of an upper substrate, a lower substrate and a supporting substrate. According to the invention, the detection of multiple diffraction orders of the micro-optical accelerometer is realized, the dynamic range of the system is improved by using high-order diffraction light, and the acceleration measurement with high precision and large dynamic range is realized.

The present application is applicable to the field of distance measurement technology, and provides a laser radar distance measurement method, device, electronic device and storage medium, including: transmitting M laser pulses to a target object, M being a natural number greater than 0; receiving M echoes formed by the target object reflecting the M laser pulses; generating M electrical signals according to the M echoes; generating M×N amplified signals according to the M electrical signals; the M×N amplified signals are generated by each of the N amplifying subcircuits amplifying the M electrical signals respectively; the amplification coefficients of the N amplifying subcircuits are different, N being a natural number greater than 1; determining the distance of the target object according to the M×N amplified signals. The present application can increase the system's distance measurement range and the ability to measure objects with different reflectivity.

The invention discloses an ultra-wideband plane wave generating system and a test system having the same, and a near-field test method of the test system. The ultra-wideband plane wave generating system includes a debugging-free plane wave generator, an electromagnetic shielding body, an absorbing material, an EUT device under test and a carrier turntable. The plane wave generator, the absorbing material, the carrier turntable and the EUT device under test are located in the electromagnetic shielding body, the electromagnetic shielding body forms a quiet zone with the same size as the plane wave generator mouth, the plane wave generator is located on one side of the inner wall of the electromagnetic shielding body, the EUT device under test is fixed on the carrier turntable, the carrier turntable and the EUT device under test are located on the other side of the inner wall of the electromagnetic shielding body, the plane wave generator includes a power division feeding network, an amplitude-stabilizing and phase-stabilizing cable and an antenna array composed of N antenna units, the antenna unit is connected to the power division feeding network through the amplitude-stabilizing and phase-stabilizing cable, and the absorbing material is located on the inner wall of the electromagnetic shielding body. The invention has a short field source distance, no debugging, high test accuracy, low cost, convenient testing, low site requirements, and low maintenance requirements.

The invention discloses a pixel circuit, an image sensor, a camera module and electronic equipment, and belongs to the technical field of electronics. The pixel circuit comprises a double-capacitor circuit, the double-capacitor circuit comprises a photodiode, a first capacitor and a second capacitor, the capacitance value of the first capacitor is larger than that of the second capacitor, and the first capacitor and the second capacitor are used for receiving and storing electrons overflowing from the photodiode; the electronic emptying circuit is connected with the first capacitor, and the electronic emptying circuit is used for emptying electrons in the first capacitor under the condition that the voltage value of the first capacitor is smaller than a first threshold value; and the phase inverting circuit is connected with the double-capacitor circuit and the electronic emptying circuit, and is used for inverting an output signal of the electronic emptying circuit and controlling the on-off of an electronic transmission path between the photodiode and the first capacitor.

The invention discloses a self-similar multi-aperture nested microphone array design method and system, and the method comprises the following steps: S1, confirming the aperture distribution of microphones in all arrays, enabling the aperture in a large array to be multiplexed in a sub-array under the condition that the formation is not changed, and obtaining the radial aperture distribution of the sub-array; s2, according to the sub-array radial aperture distribution and the sub-array circumferential distribution rule obtained in the step S1, array arrangement of all arrays and total array arrangement after nesting are obtained; s3, according to a specified target resolution constraint requirement and the array arrangement and the nested total array arrangement obtained in the step S2, realizing sub-array weighting function optimization and maximum gain function optimization; and S4, according to the optimized sub-array weighting function and the maximum gain function in the S3, in combination with a specified gain function threshold, obtaining an applicable frequency range of each sub-array and an optimized weighting function coefficient of each frequency sub-array.

A beam steering projection system includes a light source configured to emit light in response to an image signal, a phase light modulator, and a spatial light modulator. The phase light modulator is configured to receive light from the light source and apply spatially varying phase modulation to the light to steer the light at an illumination angle and produce a first steered light. The spatial light modulator is configured to receive the first redirected light, apply a spatially varying amplitude modulation to the light, redirect the light toward the projection optical system, and generate a second redirected light. The plane of the secondary image constructed after the phase light modulator and before the spatial light modulator is parallel to the phase light modulator.

The invention belongs to the technical field of inertial sensors, discloses a light quantum gyroscope closed-loop control system based on quantum enhanced detection, and aims to improve the measurement precision and system dynamic range of a light quantum gyroscope based on quantum enhanced detection. According to the system, a closed-loop feedback mechanism is introduced, closed-loop feedback is carried out on phase difference caused by space rotation and detected by quantum enhancement detection, quantum state interference is optimized, the signal-to-noise ratio of interference signals of detection light is increased, intensity noise of an atom interference system is restrained, and meanwhile the dynamic range of a gyroscope system is widened.

The application provides a photoelectric chip testing device and a testing method thereof. The testing device comprises a testing seat, a probe, a light source and a code disc. The testing seat is used for fixing a testing chip. The probe is arranged in the testing seat and corresponds to a PAD disc of the testing chip and is electrically connected with the PAD disc. The light source is used for providing light to the testing chip and is arranged opposite to a photosensitive area of the testing chip. The code disc is used for adjusting an area of the light of the light source irradiating to the photosensitive area of the testing chip. The code disc is arranged between the testing chip and the light source. The code disc is provided with at least one light transmission area. When the code disc rotates, the light of the light source irradiates to the photosensitive area through the light transmission area. The photoelectric chip testing device and the testing method thereof provided by the application can change the light energy of the light irradiating to the photosensitive area by changing the area of the light of the light source irradiating to the photosensitive area, thereby improving the accuracy of the testing result.

The invention discloses a synchronous vector magnetic field measurement device, method and equipment based on a diamond NV color center, a medium and a product, and relates to the field of magnetic field measurement, and the method comprises the steps: constructing a magnetic field Cartesian coordinate system of an NV magnetometer; four microwave modulation signals are generated to apply excitation signals to the diamond at different frequencies, so that information from a plurality of NV directions is encoded in independent frequency bands, and measurement is performed on an optical detector in a diamond NV color center magnetometer probe to obtain voltage signals; performing phase-locked demodulation and filtering to extract signals related to each NV direction to obtain voltage offsets of different NV axes; the voltage offsets of different NV axes are converted into frequency offsets through the zero crossing point slope of the demodulation curve; determining the change relation between the frequency variation of the four NV axes and the three-axis magnetic field component; determining an effective gyromagnetic ratio matrix; calculating a left pseudo-inverse matrix; according to the invention, all Cartesian components of the dynamic magnetic field in the NV color center ensemble can be synchronously measured in real time.

The invention relates to a liquid crystal display television display technology, discloses a method for improving the dynamic display effect of a backlight partition liquid crystal display television, a storage medium and a television, and aims to improve the display effect of dark field signals of the backlight partition liquid crystal display television. In the invention, the following operations are executed for each frame of picture: S1, counting the average brightness information of the current frame; s2, judging whether the current frame is a dark field signal or not according to the average brightness information of the current frame and a preset dark field signal brightness judgment threshold value, if so, entering step S3, otherwise, not correcting the current frame, and ending the process; s3, counting a partition signal input value of the current frame; s4, adjusting the partition signal output value of the current frame according to the partition signal input value of the current frame and the dynamic correction coefficient to obtain a correction curve of the current frame; and S5, adjusting the backlight drive of the backlight partition according to the correction curve of the current frame. The method is suitable for the backlight partition liquid crystal display television.

A wireless energy harvesting system, a spin diode and a preparation method thereof, comprising a microwave antenna, an impedance matching circuit, a microwave rectifier and an energy storage unit connected in sequence; the microwave rectifier adopts a spin diode based on a nano-magnetic tunnel junction. The system of the present invention adopts a spin diode, has the characteristics of high working bandwidth and wide dynamic range, and has high conversion efficiency at low input power.

The embodiment of the invention discloses a signal processing method and device and electronic equipment, and the method comprises the steps: carrying out the optical signal collection and conversion processing of a first position corresponding to a pixel group through a first pixel unit in a pixel array in a first exposure period, and obtaining M first signals; wherein the pixel array comprises the pixel groups in i rows and j columns, and each pixel group comprises one first pixel unit and one second pixel unit; m, i and j are respectively integers greater than 1; determining a second signal corresponding to the first position through a second pixel unit in the pixel group; and carrying out fusion processing on the M first signals and the second signals to obtain M image signals corresponding to the positions.

The present invention discloses a three-transistor memory with a buried gate and a composite dielectric gate structure, a read-out and write method, and a storage and computing array, and belongs to the field of semiconductor technology. The three-transistor memory adds a buried gate structure to form a three-transistor structure on the basis of an existing composite dielectric gate dual-transistor photosensitive detector, controls the erase weight to the storage device through the buried gate structure, and uses the charge coupling principle to realize the storage and readout of charge information, inheriting the characteristics of the composite dielectric gate dual-transistor photosensitive detector of small size, high dynamic range, and strong weight retention ability. The three-transistor memory provided by the present application can realize the interconnection relationship of the co-write transistors when forming an array, and further reduces the device area while forming a storage array.

The invention relates to an interference elimination device suitable for a broadband receiver, and belongs to the technical field of wireless communication. The device comprises a first power divider, a second power divider, a filter, an analog-to-digital converter (ADC), a signal processing unit, a digital-to-analog converter (DAC) and a combiner. The first power divider divides a broadband radio frequency signal into a reference signal and a pre-cancellation receiving signal. A reference signal is divided into multiple paths of narrow-band radio-frequency signals, the narrow-band radio-frequency signals are converted into digital signals through an ADC and then sent to a signal processing unit, and interference signal components are detected. The signal processing unit generates a corresponding digital anti-phase offset signal, and the digital anti-phase offset signal is converted into a radio frequency offset signal through the DAC. And the radio frequency offset signal is sent to the combiner to be combined with the pre-elimination receiving signal. Interference components contained in the pre-elimination receiving signal are added and counteracted by the counteracting signal, and a counteracted useful signal is obtained. The device carries out adaptive interference cancellation on the radio frequency signal received by the broadband receiver, prevents the broadband receiver from being blocked by in-band interference, and enables the broadband receiver to obtain a larger dynamic range.