322 results about "High dynamic range" patented technology

The invention belongs to the technical field of semiconductor display, particularly relates to a backlight and display drive cooperative control LED module system, and aims to solve the problems of brightness distortion, halo effect and energy efficiency degradation caused by disconnection of backlight and pixel control in high dynamic range display. The system generates adaptive backlight distribution through image semantic analysis and illumination field reconstruction, and realizes stable light output in combination with dynamic cutting compensation and temperature feedback; and the display driving end performs gray scale feedforward correction according to the backlight state, and introduces a cross-domain error back propagation mechanism to realize frame-level online calibration. And the dynamic response and the processing real-time performance are further optimized through motion vector sensing and double-phase time sequence scheduling. According to the system, the contrast ratio is increased to more than 100000: 1, the halo radius is reduced to 40% of that of a traditional scheme, the power consumption is reduced by 18%, and the visual experience and the operation stability are remarkably improved.

The invention discloses a tunnel face geological information acquisition and image processing method based on machine vision, which belongs to the technical field of image processing, and comprises the following steps: resolving the pose of a terminal in real time through a visual inertial odometer, generating augmented reality guide information, and guiding the terminal to move to a standard acquisition point; at each acquisition point, performing multi-stage verification of scene semantic compliance, motion blur and defocus and illumination uniformity on the image flow to ensure the acquisition quality; for tunnel high-dynamic illumination, adopting an adaptive brightness segmentation and multi-resolution fusion technology based on an improved Otsu algorithm to perform high-dynamic range reconstruction on a single-frame image so as to recover details; and finally, performing clustering optimization based on the feature matching similarity, and screening out an optimal image subset for three-dimensional reconstruction. According to the method, the problems of subjective and random acquisition process, many image quality defects, detail loss under extreme illumination and large image data redundancy are solved.

A system, method, and computer program product are provided for high-dynamic range images. In use, a first pixel attribute of a first pixel is received and a second pixel attribute of a second pixel is received. Next, a scalar based on the first pixel attribute and the second pixel attribute is identified. Finally, the first pixel and the second pixel are blended, based on the scalar, wherein the first pixel is brighter than the second pixel. Additional systems, methods, and computer program products are also presented.

The invention belongs to the technical field of electromagnetic detection, and relates to an electromagnetic detection multi-level current emission system for a plateau environment and a control method. The control method comprises the steps of calculating load model impedance; analyzing an MFPWM control process, and determining an optimal control parameter by using an optimization target of transmitting spectrum intensity maximization; and MFPWM optimization control: realizing directional power distribution and independent regulation and control of each frequency component by adjusting the frequency and amplitude of each modulation signal component. A multi-level topological structure is adopted, high output voltage is achieved while switching voltage stress is reduced, and the problems that cost rises and system complexity is too high due to the fact that a traditional H-bridge inverter depends on high power supply voltage are solved; by matching with multi-frequency pulse width modulation optimization control, spectrum energy can be flexibly configured, high-frequency components of transmitted signals are enhanced, and the spectrum energy utilization rate and the signal-to-noise ratio are improved; grounding impedance changes in a high dynamic range can be accurately tracked, and the requirements of deep geological electromagnetic detection in an extreme environment are met.

The invention discloses a real-time monitoring and analyzing system based on video intelligent analysis, and relates to the technical field of intelligent video surveillance. During operation of the system, video information and environmental parameters in a monitoring area are synchronously acquired, and continuous video streams are acquired based on a high dynamic range image sensor; time information and space position information are embedded in the video frame to form a data source with space-time attributes; the method comprises the steps of performing real-time preprocessing and feature extraction on a video stream, completing noise suppression, background modeling and target extraction, performing cross-view association and trajectory fusion on multi-node target features, realizing space-time alignment analysis, sensing scene and metadata changes, dynamically adjusting analysis parameters, and executing online updating of a model; semantic analysis and state judgment are carried out on the fusion features, and graded alarm information is output; operation data is stored in a centralized mode, optimization retraining is conducted on the model based on historical data, and synchronization is conducted to the edge side to improve the overall performance of the system.

A system, method, and computer program product are provided for high-dynamic range images. In use, a first pixel attribute of a first pixel is received and a second pixel attribute of a second pixel is received. Next, a scalar based on the first pixel attribute and the second pixel attribute is identified. Finally, the first pixel and the second pixel are blended, based on the scalar, wherein the first pixel is brighter than the second pixel. Additional systems, methods, and computer program products are also presented.

An auto-exposure control is proposed for high dynamic range images, along with a neural network for exposure selection that is trained jointly, end-to-end with an object detector and an image signal processing (ISP) pipeline. Corresponding method and system for high dynamic range object detection are also provided.

A distance image processing unit performs pre-measurement by a driving method that allows calculation of a distance and a reflectivity of a subject present in a measurement space, calculates the distance to the subject and the reflectivity of the subject as a situation of the subject present in the measurement space based on a measurement result of the pre-measurement, performs main measurement based on the situation of the subject present in the measurement space, and selects, in the main measurement, whether to perform high dynamic range (HDR) driving that expands the measurement range or to perform normal driving that does not expand the measurement range, based on the situation.

An auto-exposure control is proposed for high dynamic range images, along with a neural network for exposure selection that is trained jointly, end-to-end with an object detector and an image signal processing (ISP) pipeline. Corresponding method and system for high dynamic range object detection are also provided.

Systems and methods for multi-modal subcellular segmentation using photolysable biomarkers and / or transcriptomic readout density maps are disclosed. The systems and methods improve the accuracy of cell segmentation of the nucleus, cytoplasm, and cell membrane regions by using optical and bleach correction from a variety of photolysable morphological markers in combination with high quality 3D images acquired with high dynamic range scans and spatial transcriptomic readout density maps.

The system related to a gated camera stereo system, a red-clear-clear-blue (RCCB) camera, at least one memory, and at least one processor communicatively coupled with the at least one memory. The processor is configured to: control the gated camera stereo system to emit a pulse of light at a predetermined wavelength, control a detector of the gated camera stereo system to capture light reflected from a scene after a preset time delay, The processor embeds depth data into two-dimensional gated images using a gate function based upon the captured light by the detector of the gated camera stereo system, control the RCCB camera to capture passive high dynamic range (HDR) images, extract features corresponding to the gated images and the passive HDR images, and fuse the extracted features corresponding to the gated images and the passive HDR images by cross-spectral matching for depth estimation.

The invention relates to a power transmission corridor parameterization reconstruction method fusing nonlinear geometric prior and semantic topology, and the method comprises the steps: obtaining point cloud data, image data and IMU inertial data of a power transmission corridor, carrying out the adaptive enhancement, and obtaining a high-dynamic-range image and time-synchronized point cloud data; based on the high dynamic range image, performing semantic segmentation by adopting a Wire-Aware BiSeNetV2 network to obtain a pixel-level semantic segmentation result, and dividing the point cloud data subjected to time synchronization into multiple types of semantic tags; based on the point cloud data with the semantic tag, a semantic-guided decoupling state estimation method is adopted for processing, and the six-degree-of-freedom pose of the unmanned aerial vehicle is obtained; and based on the six-degree-of-freedom pose of the unmanned aerial vehicle, fitting is carried out by adopting a catenary constrained parameterized mapping method, and drift correction is carried out to obtain parameters of the power transmission corridor wire. Compared with the prior art, the method has the advantages of high precision, high robustness and the like.

The invention discloses a communication method based on a low-noise high-dynamic full-wave radio frequency channel amplification circuit, and relates to the field of wireless communication and radio frequency integrated circuits. The method comprises the following steps: firstly, sampling a baseband signal and constructing a multi-dimensional time sequence feature vector containing a historical state and a change rate; predicting a signal envelope peak value in a future time window by using a lightweight long short-term memory network (LSTM); a dynamic bias control signal is then generated based on reverse mapping and parasitic parameter compensation. Digital delay is introduced into a radio frequency main path, so that bias voltage is pre-loaded to a grid electrode of an amplifier before a radio frequency signal arrives, and negative delay control is realized; and finally driving the amplifier through asymmetric filtering. According to the invention, the problem of signal truncation distortion caused by response lag in the traditional dynamic bias technology is solved, the amplifier is in a deep AB-class or B-class state of low quiescent current for a long time while ensuring no distortion in a high dynamic range, the power consumption and the thermal noise are greatly reduced, and the signal-to-noise ratio of the system is improved.

An auto-exposure control is proposed for high dynamic range images, along with a neural network for exposure selection that is trained jointly, end-to-end with an object detector and an image signal processing (ISP) pipeline. Corresponding method and system for high dynamic range object detection are also provided.

A power generator has a first plurality of power amplifiers each configured to receive a first common supply voltage and output a plurality of discrete DC voltages. At least one of the plurality of discrete DC voltages may be varied by varying the first common supply voltage. The radio frequency power generator may also include a second plurality of power amplifiers that receive a second common supply voltage different from the first supply voltage or a different supply voltage. At least one discrete DC voltage of the plurality of discrete DC voltages may be varied by varying the second common supply voltage or a different supply voltage. The outputs of each power amplifier are superimposed in series to generate an output voltage for the power generator. One of the plurality of power amplifiers is activated or deactivated at a first time, while another of the plurality of power amplifiers is activated or deactivated at a second time.

Proposed are a High Dynamic Range (HDR) image acquisition apparatus and an HDR image acquisition method. The HDR image acquisition apparatus may include at least two image acquisition modules configured such that each of the at least two image acquisition modules includes an image sensor and has a target sensing light intensity range different from each other, the at least two image acquisition modules being configured to simultaneously photograph a target photographing region. Furthermore, the HDR image acquisition apparatus may include an HDR-type image synthesis part configured to generate an HDR image by synthesizing at least two images in an HDR synthesis manner, the at least two images being simultaneously acquired by the at least two image acquisition modules.

A pixel and an image sensor, relating to the technical field of image sensors. The pixel comprises: a photosensitive unit for generating electric charges in response to light; a transmission unit for transmitting the electric charges generated by the photosensitive unit to a floating diffusion node; a reset unit for resetting the pixel; an amplification unit for amplifying a voltage at the floating diffusion node and outputting the amplified voltage to a storage unit; the storage unit for storing a reset voltage and a signal voltage; a switching unit for switching an exposure mode of the pixel and switching a conversion gain of the pixel in the exposure mode, wherein the exposure mode comprises a global shutter mode and a rolling shutter mode; and an output unit for outputting the reset voltage and the signal voltage. The pixel supports global shutter and rolling shutter, and supports a high dynamic range in both a global shutter mode and a rolling shutter mode.

The invention provides an autonomous vehicle with a video camera that merges images taken a different light levels by replacing saturated parts of an image with corresponding parts of a lower-light image to stream a video with a dynamic range that extends to include very low-light and very intensely lit parts of a scene. The high dynamic range (HDR) camera streams the HDR video to a HDR system in real time—as the vehicle operates. As pixel values are provided by the camera's image sensors, those values are streamed directly through a pipeline processing operation and on to the HDR system without any requirement to wait and collect entire images, or frames, before using the video information.

The invention provides an automatic gain control radio frequency receiving circuit and electronic equipment, a first end of a first switch of the radio frequency receiving circuit is connected with a radio frequency receiving line, a second end of the first switch is connected with a first end of a second switch, and a third end of the first switch is connected with a frequency reduction processing circuit. A signal received by the radio frequency receiving line is input into the second switch or the frequency reduction processing circuit through the first switch; the second end of the second switch is connected with the frequency reduction processing circuit, the third end of the second switch is connected with the first end of the radio frequency detection circuit, the second end of the radio frequency detection circuit is connected with the first end of the adjustable attenuator, the second end of the adjustable attenuator is connected with the radio frequency transceiver circuit, and the third end of the radio frequency detection circuit is connected with the radio frequency transceiver circuit. According to the scheme, wide-frequency-band coverage of a radio frequency receiving link, real-time processing of large-bandwidth signals, high-dynamic-range adjustment and real-time processing of violent fluctuation of received signal power can be achieved.

A single Geiger avalanche photodiode pixel interconnected with a readout circuit is decomposed to form M * M parallel pixel structures, the M * M parallel pixel structures are connected to a single pixel input stage of the readout circuit, and the time complementation relation between pixel avalanche events is utilized to enlarge the pixel avalanche events. The detection probability of the array single-photon detector pixel is improved, the photon detection dynamic range is expanded, the upper limit of the pixel photon saturation counting rate of the array single-photon detector can be remarkably improved, and the method is applied to the fields of high-dynamic-range laser three-dimensional imaging, space laser communication and the like.

This disclosure provides systems, methods, and devices for image signal processing that support high dynamic range (HDR) image processing. In a first aspect, a method of image processing includes receiving, by a processor, first image data comprising a plurality of image frames comprising at least a first image frame having a first bitwidth and a second image frame having a second bitwidth, wherein the plurality of image frames represent a same scene; and determining a processed image frame having an output bitwidth higher than the first bitwidth and higher than the second bitwidth, the processed image frame based on the plurality of image frames by combining the plurality of image frames to obtain the output bitwidth. Other aspects and features are also claimed and described.

The present disclosure relates to a pixel circuit of an image sensor, the pixel circuit comprising: a pinned photodiode (PD) coupled to a sense node (SN); a comparator (104) configured: to compare, during a first read phase, a first sense node voltage (Vpix) at the sense node (SN) with a first voltage ramp (V_RAMP) and to generate an output signal (WRITE) if the voltage of the first voltage ramp (V_RAMP) crosses the first sense node voltage (Vpix); and, otherwise, to compare, during a second read phase, a second sense node voltage (Vpix) at the sense node (SN) with a second voltage ramp (V_RAMP) and to generate an output signal (WRITE); and a memory (108) configured to receive a digital ramp (DATA_RAMP), and to store, in response to the output signal (WRITE) of the comparator (104), a value of the digital ramp (DATA_RAMP) to form pixel data (DATA_PIX).

The present application provides an image processing method, system, device and electronic equipment. The embodiment does not immediately perform image acquisition after receiving an image acquisition request, but first controls the X-ray detector to be in a waiting exposure state and maintains for a period of time (the period of time is from the beginning of the X-ray generator emitting a specified dose of X-rays to the target object to the end of the X-ray generator emitting X-rays according to the specified requirements), and then rapidly acquires the first image and the second image in turn, and finally obtains the target image (simultaneously presenting the information of the thick area and the thin area of the target object) meeting the above image acquisition request based on the first image and the second image, thereby improving the quality of the image such as the high dynamic range of the image.

The application discloses an image sensor readout circuit, an image sensor and a working method thereof, and belongs to the field of sensors. A switch selection circuit is connected with a pixel circuit of the image sensor. In a first state, a slope voltage is connected to a first node, and a reset signal and an image signal output by the pixel circuit under high conversion gain are connected to a second node in sequence. In a second state, the slope voltage and a coupling signal of the reset signal or the image signal output by the pixel circuit under low conversion gain are connected to the first node, and a reference voltage is connected to the second node. An analog-to-digital conversion circuit quantizes the high-gain reset signal and the high-gain image signal to obtain effective image signal quantization values under high gain, and quantizes the low-gain reset signal and the low-gain image signal to obtain effective image signal quantization values under low gain. While realizing high dynamic range of the image sensor, the cost is reduced and the volume is reduced.

The present disclosure relates to a device and a method for transmitting information required when a quick media switch (QMS) function is operated in a wired audio / video (AV) transmission standard technology such as HDMI. Specifically, the present disclosure relates to a device and a method for supporting a seamless operation without screen blanking by transferring, in advance, video format change information such as chroma sampling, a pixel format, or a high dynamic range (HDR) format as well as frame rate change information to a sink device by a source device during a QMS operation.

Methods for acquiring mass spectral data of a sample across at least a portion of an m / z range include receiving mass spectral data of the sample across the m / z range. The m / z range is partitioned into one or more sets of m / z sub-ranges, each set comprising one or more m / z sub-ranges, by dividing the m / z range into a plurality of m / z bins, determining an indication of ion abundance for each m / z bin, based on the mass spectral data, and forming an m / z sub-range of the one or more sets of m / z sub-ranges by assigning m / z bins having ion abundances that correspond to at least a threshold degree to the formed m / z sub-range. A mass analysis is performed on the sample for each set of m / z sub-ranges, thereby acquiring one or more partial mass spectral data sets.

The invention discloses a dynamic scene reconstruction method and system based on an event camera and a global shutter, and the method comprises the steps: S10, event collection: the event camera outputs an asynchronous event stream, and the data format is a sparse point set; s20, frame image collection: a global shutter camera collects a complete image at a fixed frame rate, and it is ensured that there is no geometric distortion; s30, timestamp alignment: forming a time sequence synchronous data pair by matching the timestamps of the event stream and the frame image; s40, feature fusion: motion compensation is carried out on a time domain, and texture and dynamic information fusion is carried out on a frequency domain; and S50, outputting a result: obtaining a fused dynamic scene reconstruction image. According to the invention, accurate timestamp alignment of the event stream and the global shutter image is realized; and the high dynamic range and the high-resolution texture are fused, so that the scene reconstruction quality is improved.

The application discloses a kind of high dynamic three-dimensional measurement method based on overexposure connected domain projection intensity adaptive distribution, generates maximum input gray chart and sinusoidal stripe chart, projection to the surface of measured object and synchronous acquisition;According to threshold, overexposure area is identified from the maximum input gray chart collected, and the boundary of overexposure area is extracted and tracked;Combining the parameters obtained by pre-calibration and the sinusoidal stripe collected, the object is preliminarily three-dimensionally reconstructed;The coordinates of boundary are mapped to projector pixel coordinate system and tracked, and are automatically connected to form closed boundary;Binary mask is generated from closed boundary, and the maximum input gray level in closed boundary is reduced to regenerate maximum input gray chart and sinusoidal stripe;Maximum input gray chart and sinusoidal stripe are projected onto the object again and collected, until the maximum input gray chart collected has no overexposure area, and the complete three-dimensional of the object is reconstructed using the corresponding sinusoidal stripe.The application can realize three-dimensional measurement of high dynamic range object.

The invention relates to the field of laser communication, and provides a parallel low-complexity frequency offset compensation method, device, equipment and medium, and the method comprises the steps: calculating the M-power variance of N M-PSK signals which are input in parallel, and carrying out the first frequency offset compensation of an original signal through the difference result of N points at intervals; the M-PSK signal is a PSK signal of which the modulation order is M; and solving an N-point M-power spectrum for the signal after the first frequency offset compensation, and performing second frequency offset compensation for the signal after the first frequency offset compensation by using the spectral line position of the M-power spectrum. The two-stage frequency offset compensation method provided by the invention has the characteristics of high dynamic range, low resource consumption, no need of data assistance and support of burst signal processing, and is particularly suitable for a frequency offset compensation scene in a high-speed laser communication link.

The present application relates to a kind of dark and weak target detection methods of wide-area astronomical image based on deep learning, belong to astronomical image processing technical field, including field of view division to original astronomical image, and pretreatment is carried out;Then the threshold segmentation label generation strategy based on star catalogue prior is established to generate label set;Deep learning semantic segmentation model is constructed and trained to obtain optimization model;With the astronomical image after pretreatment as input, output target segmentation map, and eliminate the connected domain target that does not conform to physical characteristics, based on the roundness feature of target area determination and separate fusion target, obtain the final mask of independent target;Based on final mask, the subpixel level center coordinates of each independent target are calculated using weighted centroid method, effectively improve the detection ability and measurement precision of low signal-to-noise ratio dark and weak target;While being able to adapt to the characteristics of astronomical data of high dynamic range, significantly improve target detection performance, especially in the extremely dark and weak target in signal-to-noise ratio 2 to 5 interval.