51results about How to "Meet resolution requirements" patented technology

The present invention discloses a terahertz spectroscopy feature extraction method based on convex combination kernel function principal component analysis, and relates to the field of spectrum analysis and substance type detection technologies. The method comprises: acquiring a time domain observed signal, filtering noise information by a frequency terahertz spectrum curve obtained from a discrete fourier transformation, performing cubic spline interpolation on the spectrum curve, performing resampling by intercepting comparable data in a same frequency range and completing data normalization; and performing a convex combination kernel function mapping on a sample after completing preprocessing, performing dimension reduction on a mapped basis function matrix to finally realize terahertz spectroscopy feature extraction, and analyzing intra-cluster, inter-cluster relationships of dimension reduced data. According to the terahertz spectroscopy feature extraction method based on convex combination kernel function principal component analysis, the number and high resolution of a spectrum sample are not required, and the effect of a interference signal on the feature extraction can be fully reduced, so that the feature extraction and a low dimension representation of the terahertz frequency domain spectroscopy are realized in the case of unknown substance types and numbers, and the method has a distinct cluster effect.

A rear projection screen assembly is described that includes a diffuser and a polarizer. The diffuser has particles dispersed within a binder. The particles and the binder have different refractive indices and are chosen such that the diffuser spreads light of an initial polarization state a cone of angles while substantially preserving the initial polarization state of the light. The diffuser also substantially depolarizing a portion of the light that is laterally scattered in the diffuser. The polarizer is disposed to receive light transmitted through the diffuser. The polarizer transmits light of the initial polarization state while absorbing a portion of the laterally scattered light that has a different polarization state. The resolution of the overall screen assembly may be made higher while also improving other characteristics of the screen assembly.

The invention discloses a method and device for detecting a video image to solve problems that the time of detecting a target image is relatively long, the cost is relatively large, and the obtained target image resolution cannot satisfy a following processing requirement in the prior art. The method comprises: obtaining a video image from a video acquisition device working at an initial operating angle and a first focal length; performing target image detection of each frame of the video image by utilizing a target image model; tracking the detected target image; when that the immobile time of the target image reaches preset time is determined via tracking, storing the current video image; adjusting the operating angle of the video acquisition device according to the position of the target image in the video image; controlling the video acquisition device to work in a second focal length according to the preset resolution of the target image, wherein the second focal length is larger than the first focal length; and controlling the video acquisition device to be switched back to the first focal length and the initial operating angel, after the obtained video image is stored.

The invention provides a method for extracting road network topology points in a picture, which can quickly and accurately identify nodes, inflection points and intermediate nodes of a road network. The method comprises four steps of reading picture information, preprocessing pictures, scanning a skeleton picture to obtain topological points and road nodes, and deleting redundant nodes. Accordingto the method, road network topological points are extracted based on picture recognition, and a basis is provided for obtaining road network data and topological relations. According to the method, avirtual road traffic system basic database construction method is expanded, road network topology point data can be rapidly obtained in batches, and the method can be applied to regional road planning. Meanwhile, according to the method, the road network pictures presented by map software are fully utilized, and the road network data source is expanded.

The invention discloses an imaging method and device of an SAR. The method comprises that scanning parameters, including the maximal scanning angle and a scanning period at least, of azimuth wave beam scanning of the SAR is determined; the SAR is controlled to carry out present azimuth wave beam scanning from a preset start moment by taking the maximal scanning angle as an initial scanning angle and the scanning period as a time length; after the present azimuth wave beam scanning, the SAR is controlled to carry out next azimuth wave beam scanning till a preset end moment by taking the maximal scanning angle as an initial scanning angle and the scanning period as a time length; and echo data obtained by as azimuth wave beam scanning between the start moment and the end moment is used to carry out SAR imaging.

The invention provides a pixel array and a manufacturing method of a display device comprising the pixel array. Based on a traditional pixel array arrangement mode, sub-pixels with the same luminescence color are integrated into one sub-pixel unit. Based on the condition that pixel array luminescence is not influenced, a mask layer plate opening is used to form one sub-pixel unit in a manufacturing technology. Mask layer plate manufacturing difficulty is effectively reduced and simultaneously a precision requirement in a pixel array manufacturing technology can be greatly decreased. And the formed display device can satisfy a resolution requirement. Through one mask layer plate opening, a plurality of adjacent sub-pixels are formed. Technology difficulty can be effectively reduced, a yield rate of the device is increased and technology cost is reduced.

The invention discloses an interference distributed optical fiber acoustic sensing device. The device includes a light source (1), a polarization controller (2), a polarization beam splitter (3), a modulation signal generating device (5), a first light amplifier (7), a first 1*2 fiber coupler (8), a time-delay fiber (9), a second 1*2 fiber coupler (10), a fiber circulator (11), a sensing fiber (12), a second light amplifier (13), a micro-reflective grating array (14), a second photodetector (15), an acquisition card (16), and a signal processing device (17) which are connected in sequence. Compared with the prior art, the device and the method can increase rapidity and simplicity of sound sensing demodulation, and different sensing spatial resolution requirements can be satisfied through flexible arrangement of spacing of a micro-reflective grating.

The invention provides a shooting control method and a mobile terminal. The method comprises the steps of: acquiring feature information in a preview image, wherein the feature information comprises at least one piece of scene feature information and shot object feature information; determining a target resolution corresponding to the feature information; and according to the target resolution, carrying out shooting on a shot object corresponding to the preview image. According to the invention, the shot object corresponding to the preview image can be shot according to the target resolution determined by the feature information in the preview image, so that the resolution of a shot image not only can meet the corresponding resolution requirement of a current scene, but also can meet imagequality requirements for different shot objects.

The invention discloses an imaging corneal curvimeter optical system, and aims to accurately measure the curvature radius and the astigmatism of the front surface of a human cornea. The optical system comprises an annular cursor, a primary imaging system, a semi-transparent semi-reflective mirror, a secondary imaging system and a CCD (charge coupled device) receiver. The optical system is characterized in that the annular cursor is imaged by the primary imaging system, reflected by the front surface of the cornea and imaged by the secondary imaging system, and an annular image is finally formed on the CCD receiver. The formed annular image is analyzed by the aid of modern image processing technology, and the curvature radius and the astigmatism of the measured cornea are calculated. The measuring range is 5.5mm-11mm, and measuring precision reaches 0.072D when the curvature radius of the cornea is 7.8mm. Measured corneas with different curvature radiuses are measured in an external focusing measuring mode by a novel imaging corneal curvimeter. In addition, the corneal curvimeter comprises a calibration system to improve precision. The optical system has the advantages of wide measuring range and high measuring precision.

The invention relates to an anti-saturation high-gain self-adaptive offset type ground nuclear magnetic resonance signal amplification apparatus. In a high-noise environment, in case of too high gains, output of an amplifier is satirized, and in case of too low gains, nuclear magnetic resonance signals cannot be effectively amplified. According to the invention, the ground nuclear magnetic resonance signals are received by use of one or more main channels, and ambient noise is received through one or more reference channels. After passing through a front amplifier and a band pass filter, receiving data passes through an analog-to-digital converter and then enters a self-adaptive noise canceller. By use of a variable step self-adaptive algorithm, the ambient noise in a learning main channel is adaptively tracked, the noise is subjected to analog quantity subtraction in the main channel after passing through a digital-to-analog converter, and high-gain amplification is then carried out after the correlation ambient noise can be effectively filtered, such that saturation of a final amplifier can be prevented, and at the same time, the requirement for resolution of a data acquisition system is met.

The invention discloses a TV camera device with four spliced double-light-path CCDs (Charge Coupled Devices) and belongs to the technical field of photoelectrical imaging. Two same imaging lens sets are adopted by the TV camera device; a turning reflector and an image synthesized compound prism are used for superposing two paths of light energies, so that the light energy on each CCD target surface is doubled; the problem of insufficient light energy on the CCD target surface during the process of splicing four single-light-path CCDs is solved; besides, the image synthesized compound prism, two light-splitting compound prisms and two reflectors are utilized to realize the separation of four CCD mounting surfaces; and a tuning mechanism containing two pairs of double optical wedges is used for eliminating the image position deviation of a two-path optical system, so that the problem of image seamless butt-joint during the process of splicing the four CCDs is effectively solved. The TV camera device provided by the invention has the advantages of simple structure, light weight, low cost, convenience in debugging, high reliability, and the like.

The invention relates to an ultrathin three-lens imaging lens set, in particular to an ultrathin imaging lens set applied to a photographing mobile phone lens and a notebook computer photographing lens. The imaging lens set consists of three lenses with refractive indexes and an open diaphragm; the first lens, the open diaphragm, the second lens and the third lens are arranged in turn from an object side to an image side, wherein the first lens is a positive lens, the front surface of the first lens is a convex surface, and the rear surface of the first lens is a concave surface; the second lens is a negative lens, the front surface of the second lens is a concave surface, and the rear surface of the second lens is a convex surface; and the third lens is a positive lens, the front surface of the third lens is a convex surface, and the rear surface of the third lens is a concave surface. Moreover, each surface of the first lens, the second lens and the third lens consists of a high-order non-spherical plastic lens so as to reduce the cost and meet the resolution requirement of a high-pixel photosensitive element.

The invention discloses a color film substrate, a preparation method thereof and a display panel, which are used for improving the resolution of a display product. The color film substrate comprises an underlayer substrate and sub-pixel areas arranged on the underlayer substrate in an array mode. At least part of the sub-pixel areas comprise light-transmitting layers with grooves and quantum dot microspheres which are located in the grooves and correspond to the light-emitting colors of the sub-pixel areas; and the width of the grooves is greater than the diameter of the quantum dot microspheres in the groove.

The invention discloses a three-dimensional laser scanning-based blind person navigation device. The device consists of a laser signal generation module, a scanning, transmitting and receiving module, a detection processing module and an information processing navigation module, wherein the laser signal generating module is used for transmitting a detection laser signal which is subjected to frequency modulation; the scanning, transmitting and receiving module is used for three-dimensional spatial scanning in the vertical and horizontal directions; the detection processing module is used for processing a laser echo signal and outputting time delay, phase and frequency shift data of laser echoes; and the information processing navigation module is used for processing detection data to acquire information such as positions, sizes, movement speeds and the like of a barrier in the front, judging danger levels of all barriers and informing blind persons of information of the barriers and moving vehicles which can bring danger to the walking of the blind persons through voice. Simultaneously, an internal global positioning system (GPS) module is used for providing specific positions for the blind persons to realize a voice prompt of an ideal destination path.

The invention discloses a signal output conversion device for dynamic platform monitoring. The device includes a dynamic platform, wherein the dynamic platform is provided with an inclination angle sensor used for detecting an inclination angle, the inclination angle sensor is electrically connected with a signal conditioning circuit module, the signal conditioning circuit module is electrically connected with a processor to convert an electrical signal measured by the inclination angle sensor into the inclination angle direction and an inclination angle and inputting the information to the processor, and a signal output end of the processor is electrically connected with the display to display the inclination angle direction and the inclination angle of the dynamic platform. The device isadvantaged in that the signal conditioning circuit module is arranged between the signal output end of the inclination angle sensor and the processor, detected inclination angle value data can be processed, a problem that accuracy of A/D conversion of the processor is reduced as the inclination angle detected by the inclination angle sensor is directly transmitted to the processor is effectivelysolved, and resolution requirements of the processor for A/D conversion are met.

The invention relates to a discrete cosine transform measurement base sorting method, which comprises the following steps of: (1) setting M*M pixels of a square image according to expected image resolution initialization parameters, M=2n, and n=1, 2,...; (2) generating a complete DCT measurement base group through inverse discrete cosine transform; (3) selecting a proper real value d, and constructing a function fd(i,j); (4) respectively taking values of i=1, 2,..., M, j=1, 2,..., M, and sequentially obtaining values of M2 fd as a sorting basis; and (5) indexing the PM(i,j) to generate a sequence of the PM(i,j) during measurement, and sorting according to M2 fd(i,j) values from small to large. According to the method, a measurement base does not need to be stored, and rapid imaging can berealized through rapid transformation, associated iteration or a compressed sensing algorithm.

The invention discloses a method for assisting an operator in making a standard identity card photo, relating to the technical field of image processing. The method comprises the steps of positioning six key points of a nose, a right eye, a left eye, a right ear, a left ear and a head top tracing top end of a head in an original image; according to the identity card making standard, calculating candidate boundaries for an operator to select, after the operator selects the candidate boundaries, automatically zomming an original image into a standard image according to the candidate boundaries, wherein the zoomed and cut head portrait meets the resolution requirement, and achieving rapid making of a standard identity card photo. The invention also discloses a tool for assisting the operator in making the standard identity card photo, and the tool can be applied to the field of intelligent image processing by being combined with the method.

The invention relates to a method and device for distributing memory of coding channels. The method includes the steps of dividing a public cache pool into a plurality of cache areas, determining one of the cache areas in the public cache pool as a memory unit of a first reestablished frame corresponding to the first channel, releasing the memory unit of the first reestablished frame to the public cache pool when determining an original reference frame corresponding to the first channel as a first reference frame, releasing the memory unit of the original reference frame corresponding to the first channel to the public release pool when determining the first reestablished frame as the first reference frame, determining the memory unit released by a previous channel to the public cache pool as the memory unit of a second reestablished frame corresponding to the current channel, releasing the memory unit of the second reestablished frame to the public cache pool when determining the original reference frame corresponding to the current channel as a second reference frame, and releasing the memory unit of the original reference frame corresponding to the current channel to the public cache pool when determining the second reestablished frame as the second reference frame.

The invention discloses a method and device for measuring grid frequency. The method comprises the following steps: obtaining sampling data collected by a power grid and carrying out auto-correlation filtering processing on the sampling data; dividing the filtered sampling data into first sampling data and second sampling data; carrying out windowing processing on the first sampling data and the second sampling data based on a second-order convolution Hanning window to determine first windowing sampling data and second windowing sampling data obtained after windowing processing respectively; determining a first phase of the first windowing sampling data and a second phase of the second windowing sampling data; and determining grid frequency according to the first phase and the second phase. The method adopts equal-data-length auto-correlation double filtering, so that in-band white noise can be filtered effectively, and SNR (signal to noise ratio) can be improved greatly; and through the second-order convolution Hanning window, spectral interference can be reduced greatly, and the method has a good signal-to-noise ratio and good spectral leak suppression ability.