30results about How to "High dynamic range)" patented technology

A high dynamic range sensor assembly includes a plurality of sensing sets that are organized into a sensing array. Each of the sensing sets includes a set of sensing elements for sensing physical phenomena. Each set of sensing elements has a locally selectable integration time. An analog-to-digital (A/D) converter operatively connected to the set of sensing elements acquires and converts an analog signal from each of the sensing elements into a digital signal. A processor operatively connected to the A/D converter and to the set of sensing elements manages the selectable integration time for the set of sensing elements and analyzes the digital signals from each of the sensing elements in the set of sensing elements. The digital signals from each of the sensing elements are measured by the processor and an integration scaling factor for the set of sensing elements is computed and controlled by the processor to adjust the integration time. The integration scaling factor for the set of sensing elements is mathematically combined with a value of the digital signal from the A/D converter to form a larger data word than what is generated by the A/D converter. The larger data word is utilized to represent a magnitude of each of the sensing elements. If a substantial number of A/D values have saturated, the integration time is decreased; and, if a substantial number of A/D values are below a predetermined threshold, the integration time is increased.

A vehicular vision system is disclosed comprising a high dynamic range. The systems and methods are advantages for rear vision, collision avoidance, obstacle detection, adaptive cruise control, rain sensing, exterior light control, and lane departure warning, as well as other applications where a given scene may comprise objects having widely varying brightness values.

A high dynamic range (HDR) image generating apparatus and method is provided. The HDR image generating apparatus may set an auto-exposure time, a long exposure time, a short exposure time, and a reference exposure time. The auto-exposure time may be set to be shorter than the long exposure time, the short exposure time may be set to be shorter than the auto-exposure time, and the reference exposure time may be set to fall within a range between the auto-exposure time and the short exposure time. The image generating apparatus may obtain a first image with the long exposure time and a second image with the reference exposure time, may correct motion in the first image and adjust a dynamic range of the second image, and then may composite the resultant first and second images to generate a high dynamic range image.

An ultra wide bandwidth communications system, method and computer program product including an ultra wide bandwidth timing generator. The timing generator includes a high frequency clock generation circuit having low phase noise; a low frequency control generation circuit; and a modulation circuit coupled between the high frequency clock generation circuit and the low frequency control generation circuit. The high frequency clock generation circuit generates a plurality of high frequency clock signals. The low frequency control generation circuit generates a plurality of low frequency control signals. The modulation circuit modulates the high frequency clock signals with the low frequency control signals to produce an agile timing signal at a predetermined frequency and phase. The agile timing signal is generated at the predetermined frequency and phase by adjustments to at least one of frequency of the low frequency control signals, phase of the low frequency control signals, frequency of the high frequency clock signals, and phase of the high frequency clock signals.

Apparatuses and methods for reading a set of images to merge together into a high dynamic range (HDR) output image are described. Images have a respective HDR weight and a respective ghost-free weight. Images are merged together using the weighted average of the set of input images using the ghost-free weight. A difference image is determined based on a difference between each pixel within a HDR output image and each respective pixel within a reference image used to create the HDR output image.

A device for synthesizing a high dynamic range image based on per-pixel exposure mapping includes an image-capturing module, an image-processing module, and a recursive control module. The image-capturing module serves to obtain a plurality of source images each having a unique exposure value. The image-processing module uses an exposure-value modulating means to perform exposure synthesis to pixels on an identical location of two of the source images that have similar exposure values according to exposure values of the pixels, so as to form synthesis images. The recursive control module sends the synthesis images back to the image-processing module for reprocessing until the image-processing module generates a single synthesis image.

The invention discloses a stable isotopic abundance ratio real-time online monitoring device and a stable isotopic abundance ratio real-time online monitoring method. A wavelength scanning off-axis integrated cavity spectrum technology is utilized for performing precision measurement on isotopic abundance ratio of an object element, and the device comprises a laser device, a laser controller, a signal generator, an angle adjustable prism, a wavemeter, an off-axis integrated cavity, a temperature and pressure controller, a piezoelectric ceramic controller, an off-axis parabolic mirror, a photoelectric detector, a lock-in amplifier and a signal processing system for acquiring A/D (analog/digital) and terminal signals. The method disclosed by the invention is performed on the basis of the off-axis integrated cavity laser absorption spectrum technology and is further combined with wavelength scanning, cavity regulation, temperature, pressure and wavelength precision control technology, so that the stable isotopic abundance ratio real-time online monitoring can be realized, and trace gas concentration and isotopic abundance ratio measurement can be simultaneously performed; furthermore, the preparation of a sample is not required, so that the measurement frequency is greatly improved; and the device has the advantages of simplicity in operation, no need of calibration, almost no drift during a long period of time, good stability, low power, convenience in carrying, mounting and field experiments and large dynamic range.

An image processing method and circuit, and a display device using the same, for minimizing image quality degradation of a high dynamic range (HDR) image without gamma transformation of a data drive integrated circuit (IC) and displaying the image in a standard dynamic range (SDR) display device are disclosed. The image processing method includes selecting a gamma curve with a first image having an HDR and cumulative minimum luminance error among a plurality of gamma curves corresponding to a display device having a SDR, and converting the first image into a second image having an SDR according to the selected gamma curve.

The invention discloses a multi-channel high-repetition-frequency large-dynamic-range distance measurement and speed measurement laser radar method and device. A laser light source generates a light beam, the light beam is divided into output light beams of N channels through a beam splitter, broadband linear frequency modulation is carried out on the output light beams of each channel, and then aphase modulator is driven after phase shift of different amplitudes, so that the output light beams of each channel have different time delays; the laser beam is divided into a local oscillation light beam and an emission light beam through a beam splitter; the N transmitting light beams are transmitted to a target in parallel and echo light beams of the target are received, coherent light mixingis carried out on the signals and corresponding local oscillation light beams, intermediate frequency signals containing target distance and speed information are obtained, parallel fast Fourier transform and cross-spectrum processing are carried out on sampling data of the intermediate frequency signals, parallel synchronous measurement of the target distance and speed is achieved, and finally merging output of point cloud images of N channels is achieved through a main control computer. The device can effectively overcome distance measurement ambiguity, and has the advantages of high repetition frequency, large dynamic distance measurement range, high resolution, high precision, high reliability, small size, light weight and the like.

A method for controlling a fuel injector provided with an electrically operated electomagnetic actuator in such a manner as to open the injector for a determined injection time; the method providing that the injector be operated with a first current waveform if the injection time is greater than a predetermined threshold value, and that the injector be operated with a second current waveform if the injection time is less than the predetermined threshold value; both the current waveforms have an identical initial portion, during which the current passing through the injector is caused to rise until it reaches a peak value, which is maintained by cyclic switching of the voltage applied to the injector between two different values.

An exemplary magnetic flux sensor in accordance with the present invention is characterized by an electrical output that is proportional to the total static and dynamic flux passing normally through a large area. An oscillating electrical current passing down a conducting area produces Lorentz forces, which are transferred to piezoelectric areas. The piezoelectric areas produce electrical voltage at the oscillation frequency whereby amplitude is proportional to the total magnetic flux passing normally through the conducting area. Demodulating the voltage provides an electrical signal with high sensitivity, dynamic range, and noise immunity.

A digital holography device of an embodiment of the present invention includes: an image sensing device which records, in an image sensor and on the basis of an object, a plurality of holograms that correspond to respective different photographic exposure values; and a computer which (i) generates a high dynamic range hologram, which includes pieces of information ranging from low luminance information to high luminance information, by synthesizing the plurality of holograms recorded and (ii) generates a reconstructed image of the object by performing arithmetic processing of phase-shift interferometry, diffraction calculation, and/or the like on the basis of the high dynamic range hologram.

The embodiment of the invention discloses an image shooting method. The method comprises the steps: obtaining a shooting instruction; responding to the photographing instruction; acquiring a first acquired image through a camera module of electronic equipment; controlling a light compensation element of the electronic equipment to be lightened at a first brightness value, and obtaining a second acquired image through the camera module; controlling the light compensation element to be lightened at a second brightness value and obtaining a third acquired image through the camera module, whereinthe second brightness value is greater than the first brightness value; and synthesizing and storing a target image based on the first acquisition image, the second acquisition image and the third acquisition image. The embodiment of the invention further provides an image shooting device and equipment and a storage medium.

A high dynamic range (HDR) image sensing method is provided. The image sensor includes steps of: sensing an image with a long integration time by a first long integration time sensor; and sensing the image with a short integration time by a first short integration time sensor.

An image sensor includes a light sensing array, a light filtering array, and a plurality of conversion units. The light sensing array includes a plurality of light sensing units. Each of the light sensing units includes a plurality of light sensing pixels. The light filtering array is disposed on the light sensing array. The light filtering array further includes a plurality of light filtering units. Each of the light filtering units correspondingly covers one of the light sensing units. Each of the conversion units includes at least two source followers. At least one of the at least two source followers is connected to a plurality of the light sensing pixels. A control method configured to control the image sensor and an electronic device including the image sensor are also provided.

A pixel circuit comprises a first capacitor,a photo diode and a switch. A voltage source generates a reference voltage to reset the pixel circuit. The pixel circuit is reset for a first reset time period by electrically coupling a cathode of the photo diode and a first capacitor terminal to the voltage source. The cathode is decoupled from the voltage source and the photo diode is exposed to light for an accumulation time period. After the accumulation time period,a first reference voltage is sampled. The cathode is then coupled, via the switch, to the first capacitor terminal for a selected transfer time period, during which a second signal voltage is sampled. After the selected transfer time period, a first signal voltage is sampled with the cathode decoupled. The pixel circuit is then reset for a second reset time period, after which a second reference voltage value is sampled.

The invention discloses an HDR image imaging method and device and a computer storage medium, and the method comprises: an image sensor carrying out the image collection, and obtaining a first image;wherein the image sensor comprises a plurality of pixel blocks which are arranged in a Bayer array, and each pixel block comprises four pixel points which are arranged in a 2 * 2 array and have the same color; merging the pixel points with the same color in the pixel blocks in the first image to obtain a second image; mapping the bit depth of the second image to be matched with the bit depth supported by an image processor to obtain a third image; and performing image signal processing on the third image, and displaying the processed third image. By adopting the scheme, the functions of previewing the HDR effect and recording the HDR video by a user in real time are realized while more dynamic ranges and image details can be provided for the shot image.

A system and method for enhancing a dynamic range of a beamforming multi-channel digital receiver are described. The receiver comprises a plurality of receiving channels, each including an analog-to-digital converter configured for converting an analog input signal generated by antenna elements into a digital signal. A “spatial” dither signal is used to decorrelate the quantization noise of the analog-to-digital converters. A dither signal is generated and split into a predetermined number of coherent dithering signals. The method includes providing predetermined time delays to the coherent dithering signals, and adding the delayed coherent dithering signals to the input signals in each receiving channel, correspondingly, thereby creating a dither signal equivalent to a signal arriving from a certain specific direction out-of-field-of-view of the antenna array. Removing of the dither signal based on the direction of arrival, is implemented during beamforming signal processing, thus enhancing the dynamic range of electromagnetic signals arriving within a field-of-view of the antenna array.

Embodiments of the present invention include an electron counter with a charge-coupled device (CCD) register configured to transfer electrons to a Geiger-mode avalanche diode (GM-AD) array operably coupled to the output of the CCD register. At high charge levels, a nondestructive amplifier senses the charge at the CCD register output to provide an analog indication of the charge. At low charge levels, noiseless charge splitters or meters divide the charge into single-electron packets, each of which is detected by a GM-AD that provides a digital output indicating whether an electron is present. Example electron counters are particularly well suited for counting photoelectrons generated by large-format, high-speed imaging arrays because they operate with high dynamic range and high sensitivity. As a result, they can be used to image scenes over a wide range of light levels.

A directional illumination apparatus comprises a waveguide with a reflective surface comprising reflective light input facets, reflective light extraction facets and an output transmissive surface. An array of sub-arrays of micro-LEDs is arranged to illuminate the reflective surface in a rearwards direction. The reflective light extraction facets cooperate to provide a uniform output illumination across the output aperture of the waveguide with collimated light that is controllable by control of the sub-arrays of micro-LEDs. A thin and efficient illumination apparatus may be used for switching high dynamic range display backlighting, privacy display or environmental illumination applications.

The present disclosure relates to an apparatus and methods for generating a hybrid image by high-dynamic-range counting. In an embodiment, the apparatus includes a processing circuitry configured to acquire an image from a pixelated detector, obtain a sparsity map of the acquired image, the sparsity map indicating low-flux regions of the acquired image and high-flux regions of the acquired image, generate a low-flux image and a high-flux image based on the sparsity map, perform event analysis of the acquired image based on the low-flux image and the high-flux image, the event analysis including detecting, within the low-flux image, incident events by an event counting mode, multiply, by a normalization constant, resulting intensities of the high-flux image and the detected incident events of the low-flux image, and generate the hybrid image by merging the low-flux image and the high-flux image.

An electronic device is provided that includes an image sensor of first pixels receiving light for a first duration and second pixels receiving light for a shorter second duration, and a processor to acquire first and second raw data including first long pixel values through the first pixels and first short pixel values through the second pixels, second long pixel values through the first pixels and second short pixel values through the second pixels, and third raw data based on the first and second raw data. The third raw data includes third long pixel values and third short pixel values, and each of the third long pixel values is an average value of a first and a second long pixel value and each of the third short pixel values is a value obtained by gamma correcting a sum of a first and a second short pixel value.

The present invention relates to a device and a method for acquiring multi-luminosity images, wherein images having multiple luminosities in visible-ray and infrared wavelength domains can be captured and synthesized by using optical filter transmittance adjustment and infrared lighting strength adjustment. The device may comprise: a camera unit for photographing a predetermined subject and acquiring images thereof; a lighting unit disposed on the periphery of the camera unit, the lighting unit comprising a first infrared lamp for modulating and emitting infrared light according to the distance from the subject and a second infrared lamp for modulating and emitting infrared light according to the photography environment; an optical filter unit disposed on the front surface of the camera unit so as to adjust the amount of transmission of light directed to the camera unit; a lamp control unit for controlling the first infrared lamp such that infrared light is modulated on the basis of the distance from the subject; a luminosity multiplexing unit for producing a light multiplexing signal so as to control infrared light modulation by the second infrared lamp and the transmittance of the optical filter unit on the basis of the photography environment; and an image processing unit for synthesizing and processing multiple captured images.

A signal processing arrangement has a signal input for connecting a capacitive sensor. An amplifier circuit is coupled between the signal input and a feedback point. A loop filter is coupled downstream to the feedback point. A quantizer is connected downstream to the loop filter and provides a multi-bit output word. The multi-bit output word consists of one or more higher significance bits and one or more lower significance bits. A first feedback path is coupled between a quantizer and the feedback point for providing a first feedback signal to the feedback point being representative of the one or more lower significance bits. A second feedback path is coupled to the quantizer for providing a second feedback signal to the signal input being representative of the one or more higher significance bits.

An illuminator according to the present disclosure includes a light source section and an optical phase modulator. The light source section emits light including first and second polarization components. The optical phase modulator generates and emits first illumination light (SDR illumination light) and second illumination light (HDR illumination light) The first illumination light is used in a light intensity modulator to generate an image in a first luminance region. The second illumination light is used in the light intensity modulator to generate an image in a second luminance region The optical phase modulator emits, as the first illumination light, light of the first polarization component without performing phase modulation. The optical phase modulator performs phase modulation on light of the second polarization component on the basis of the image in the second luminance region, and emits the phase-modulated light as the second illumination light.