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

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.

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.

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.

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.

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.

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.