50results about How to "Fix low resolution" patented technology

The invention discloses a real-beam scanning radar angular super-resolution method under a clutter background. A convolution model of target amplitude and an antenna directional diagram is established by azimuth dimension echo through modeling according to the echo characteristic of scanning radar after pulse compression, and echo signals are processed according to a maximum likelihood deconvolution method. Clutter characteristics are represented by adopting rayleigh distribution and a target function is established, the maximum likelihood solution is obtained by solving the target function, and an iteration expression is constructed so that a problem of low azimuth dimension resolution of a conventional scanning radar imaging mode can be solved, and scanning radar angular super-resolution imaging can be realized.

The invention relates to the field of optical measurement, and discloses a miniature spectrometer with an adjustable resolution ratio. The miniature spectrometer comprises a miniature stepping motor, a plurality of wedge angle piece pairs with different wedge angles, a double-cavity etalon and an MEMS (micro-electromechanical system) with a reflector. The wedge angle piece pairs are mounted around the circumference of a cylindrical turntable according to the size sequence of the wedge angles. The wedge angle piece pairs are rotated by the miniature stepping motor, so that a test light beam enters the double-cavity etalon by continuous different angles, continuous translation of filter characteristics of the double-cavity etalon is realized by the aid of comb filter effects of the double-cavity etalon, and the transmission wavelength of the double-cavity etalon is changed. The spectrum test resolution ratio of the miniature spectrometer is increased, the problem of low resolution ratio of the miniature spectrometer is solved, and the miniature spectrometer is compact in structure and low in manufacturing cost.

The invention discloses a voltage-type analog-to-digital conversion circuit and a photoelectric sensor using the same. The voltage-type analog-to-digital conversion circuit is used for converting an analog current signal into a digital signal and is characterized by comprising a current integrating circuit for receiving and integrating the analog current signal and outputting an integration voltage signal; an integration voltage amplification circuit for receiving, holding, and amplifying the integration voltage signal and outputting an integration voltage amplification signal; a comparison and quantification circuit for generating a comparison signal according to the integration voltage amplification signal; and a counting circuit for receiving the comparison signal and a clock signal, counting the clock signal when the comparison signal is held at an active level, and using a counting result prior to the inversion of the comparison signal as the digital signal. The voltage-type analog-to-digital conversion circuit may increase the resolution and precision of analog-to-digital conversion.

The invention belongs to the technical field of radar signal processing and relates to an imaging method for a bistatic inverse synthetic aperture radar. The invention provides an imaging method for the bistatic inverse synthetic aperture radar on the basis of a gradient projection algorithm and provides a constructing method of a sparse base of echo signals. By use of the imaging method, the problem of low imaging resolution caused by large bistatic included angles in the actual condition is solved, the sparsity caused by echo-signal insufficiency under the large bistatic included angles is fully utilized, sparse sampling is directly carried out on echoes of the bistatic ISAR, then reconstruction is carried out by the gradient projection algorithm, and high-accuracy estimated values for imaging points can be directly obtained. According to the imaging method, the numerous limitations of the traditional algorithm are avoided, and by utilization of the sampling bandwidth far lower than double signal bandwidth, the pressure of acquisition, transmission, processing and storage of data is relieved, simultaneously, the imaging quality is almost not influenced by the large bistatic included angles, the imaging result is not interfered by sidelobe clutters of the radar, and the super-resolution imaging can be realized when the echo signals are not complete.

The embodiment of the invention provides a display driving method and a device, relates to the field of a display technology, solves the problem of lower resolution ratio of a display device under the condition of not increasing the size of a pixel in the existing 3D display, improves the resolution ratio and enhances the display effect of the display. The method comprises the following steps of: acquiring the input signal of each sub pixel in each physical pixel unit in a first view pixel unit and a second view pixel unit; setting a sampling area on the pixel array aiming at each sub pixel of the physical pixel unit located on the boundary of the pixel array in all physical pixel units of the first view pixel unit and the second view pixel unit; and determining the output signal of each sub pixel according to the sampling area of each sub pixel, the physical pixel unit which is overlapped with the sampling area and belongs to the same view pixel unit with the sub pixel and the input signal of each sub pixel. The method and device which are provided by the invention are applicable to the pixel display technology.

The invention discloses an airborne radar oblique forward-looking super-resolution imaging method, which is applied to the field of radar imaging and aims to solve the problem that a traditional oblique forward-looking Doppler sharpening method is low in resolution. According to the invention, an oblique forward-looking vector convolution-like accurate echo model is established to break through the mechanism-based bottleneck of oblique forward-locking resolution improvement; frequency domain non-linear projection space-variant removing processing is carried out on radar echoes to remove a distance-Doppler strong coupling relation in a large-breadth imaging mode; and finally, high-efficiency super-resolution reconstruction of the target scattering coefficient of the large oblique forward-looking area is realized through a convolution-like merging inversion method. Compared with a conventional DBS method, the method is higher in resolution, can remarkably reduce the calculation complexity in a large-breadth imaging mode, and is suitable for engineering implementation.

The invention discloses a high resolution infrared imaging optical system. The system comprises a front optical system, a filter system, a microlens array, a back set optical system and a detector focal plane array which are sequentially arranged along an optical axis, wherein the microlens array is arranged on a back focal plane of the front optical system, the filter system is a flat lens provided with multiple shadow areas and transparent areas, the microlens array and the filter system are parallel, the microlens array comprises multiple microlenses which are spliced together, the detector focal plane array comprises multiple image elements which are spliced together, the image elements, the microlenses and the transparent areas correspond to each other in one-to-one mode, and a modulation system is further arranged between the optical system and the filter system. The invention further discloses an imaging method. The system is advantaged in that the structure is simple, the system is easy to process, high resolution infrared imaging can be realized without any motion part, super large aperture angles can be realized, the system is particularly suitable for infrared wave bands, and a problem of low resolution of an infrared imaging system in the prior art can be effectively solved.

The invention discloses a frequency division matching method for increasing seismic data resolution of a limestone exposure area. In the frequency division matching method, a high-sensitivity detector and conventional detectors are considered to be used for observation under same conditions; then, seismic data acquired under the same conditions are respectively subjected to frequency division treatment by taking 20Hz as a boundary; then the seismic data more than 20Hz, corresponding to the high-sensitivity detector, are used as desired output to figure out a matched filter; furthermore, the seismic data more than 20Hz, which are acquired by all the conventional detectors, are subjected to matching filtering; and finally, the seismic data smaller than or equal to 20Hz, which are acquired by the conventional detectors, as well as the matched seismic data more than 20Hz are subjected to data reconstruction to obtain the seismic data subjected to frequency-division matching. According to the invention, the high-frequency components, corresponding to the seismic data, of the conventional detectors are enhanced, the low-frequency components are maintained, and the resolution of the seismic data of the limestone exposure area is increased.

The present invention relates to a method for separating and purifying natural product by using three-phase counter-current chromatography. Sad method is characterized by that in the immobile phase of conventional counter-current chromatography a solid separation medium-microsphere can be added so as to form a three-phase separation system including liquid immobile phase, solid immobile phase and liquid mobile phase, so that the counter-current chromatography and column chromatography can be combined into one body, therefore the separation and purification efficiency of natural product can be greatly raised.

The invention discloses a parallel two-finger mechanical gripper which comprises a driver and two parallel clamping jaws paralleled mutually. The two clamping jaws are connected onto the driver; the driver is used for driving at least one clamping jaw to move; multiple elastic protruding parts are arranged on the opposite inner sides of the two clamping jaws in an array mode; and a cavity is formed in each elastic protruding part, so that the stressed elastic protruding parts can contract inwards when the two clamping jaws clamp an object. The invention further discloses a method for recognizing the types of grabbed objects through the parallel two-finger mechanical gripper. The parallel two-finger mechanical gripper provided by the invention has good stability and adaptability when being used for grabbing objects in different shapes.

The embodiment of the invention provides a near-eye display device and virtual/augmented reality equipment. The near-to-eye display device comprises a substrate, a combined microlens array arranged on the substrate and a pixel island array located on the side, away from eyes, of the substrate, the combined microlens array comprises a plurality of combined microlenses arranged at intervals, and the pixel island array comprises a plurality of pixel islands arranged at intervals. Each pixel island corresponds to one combined micro lens, and each pixel island is arranged at the focal point of the corresponding combined micro lens; and each combined microlens comprises a first microlens arranged on the surface of the side, facing the eye, of the substrate and an additional microlens arranged between the first microlens and the pixel island. Through the arrangement of the combined microlens array, the pixel points at the edge parts of the pixel islands can form an effective view field, the number of the pixel points under each lens view field angle is increased, and the display resolution is improved on the premise of meeting the requirements of light and thin near-to-eye display.

The invention provides a flood risk map plotting system and method based on a B/S structure.The method comprises the steps that a user side retrieves environment information data from a server, and flood risk factor data is generated through logical operation and saved in the server in a key value format; the server generates a first flood risk factor map layer according to the flood risk factor data; the user side sends basic parameter information acquired in advance to the server; the basic parameter information comprises one or more of the format, the resolution ratio, the drawing range, the mapsheet, the title, the explanatory note, the legend and the layout; the server generates a first flood risk map according to the basic parameter information and the first flood risk factor map layer; the user side displays the first flood risk map on a browser according to a browsing instruction acquired in advance.According to the flood risk map plotting system and method based on the B/S structure, the problems that a flood risk map drawn through the prior art is single in format and low in resolution ratio are solved.

The invention belongs to the technical field of display screen preparation, and specifically relates to a fluorescent display screen containing an up-conversion luminescent material and a preparationmethod and an application thereof. The display screen comprises a substrate, a red fluorescent material layer, a green fluorescent material layer, a first isolation layer, a blue fluorescent materiallayer and a protective layer which are successively superimposed, wherein the green fluorescent material layer and the red fluorescent material layer are further provided with a second isolation layertherebetween. The display screen is made of an ultra-flat transparent material, thereby being capable of avoiding a phenomenon of diffuse reflection. The adopted organic or macromolecular green and blue fluorescent materials are anisotropic, thereby being capable of avoiding a phenomenon of mirror reflection. Saturated red light can be obtained by adopting the up-conversion luminescent material,the light emitting efficiency is high, and the stability is good. When the screen takes laser light as a light source, the resolution reaches up to 10k. The fluorescent display screen is simple in preparation method, low in cost and long in service life. The fluorescent display screen is portable, can be folded and unfolded, water-proof and not driven by electric power, so that the fluorescent display screen can be applied to many fields.

The invention discloses a bulk block high pixel bitmap exporting method of an AutoCAD large image. Secondary development is carried out aiming at AutoCAD2008 by using Object ARX2008; automatic block batch exporting is carried out on the large image so as to generate high pixel bitmaps according to the total height and width of the to-be-exported large image; file numbering is carried out automatically; follow-up image processing operation is only carried out on a certain block bitmap; the capacities of bitmap files are clearly reduced; and the operation speed is greatly increased.

The invention relates to a mobile phone with video monitor tester functions. The mobile phone is characterized in that a video monitor tester chip and accessory circuits of the chip are integrated on a mobile phone circuit board, the mobile phone comprises a video signal processing module and a UPT (universal personal telecommunication) module, the video signal processing module and the UPT module are communicated with the video monitor tester chip through interfaces, and a video monitor tester module is powered by a mobile phone battery and is communicated with the mobile phone through another interface. The appearance of the mobile phone is modified, a video signal output port, a UPT interface and a conversion line interface are added, a corresponding APP is designed, and each function of the video monitor tester is viewed through the APP of the mobile phone, so that the video monitor tester is greatly convenient to use in life and work.

The embodiment of the invention relates to the field of optical display, and discloses a naked eye 3D display optical device and a naked eye 3D display system. The naked-eye 3D display optical device comprises a diaphragm layer and at least one lens array layer, the diaphragm layer comprises a light-transmitting area and a shading area which are arranged at intervals, each lens array layer in the at least one lens array layer comprises a lens assembly, and the lens assembly comprises a plurality of lens areas which are arranged at intervals. Wherein the light-transmitting areas of the diaphragm layer are in one-to-one correspondence with the lens areas of any lens array layer, and the aperture of each light-transmitting area in the diaphragm layer is smaller than or equal to the aperture of the lens area corresponding to the light-transmitting area in the diaphragm layer when the central points are on the same straight line. According to the naked-eye 3D display system adopting the naked-eye 3D display optical device in the technical scheme, through filtering of the diaphragm layer, it can be ensured that light in 3D display is light with relatively small aberration, so that the influence of the aberration on a 3D display image can be reduced, and the definition of the naked-eye 3D display image is improved.

The invention discloses a high-pixel bitmap batch blocked exporting method of an AutoCAD large picture. An OjbectARX2008 conducts secondary development on AutoCAD2008, according to the total height and the width of the large picture which needs to be exported, high-pixel bitmaps are automatically exported in batches in a blocked mode, files are automatically numbered, only a certain blocked bitmapneeds to be operated in later image processing, the file capacity of the bitmap is obviously reduced, and the operation speed is greatly increased.

The embodiment of the invention discloses a processing method and device for a fan image of a wind power station and a computer readable storage medium. The method comprises the steps that: the fan image of the wind power station is acquired; whether the fan image is a low-resolution image or not is judged, wherein the resolution of the low-resolution image is smaller than or equal to a first preset resolution; and when the fan image is a low-resolution image, the fan image is substituted into the trained network model, a high-resolution image corresponding to the fan image is determined, and the network model is used for representing the mapping relation between the low-resolution image and the high-resolution image. According to the wind power station fan image processing method and device and the computer readable storage medium disclosed by the embodiment of the invention, high-resolution reconstruction can be performed on the low-resolution image aerially photographed by the unmanned aerial vehicle fan, and the problem that the resolution of the fan image aerially photographed by the unmanned aerial vehicle is low is solved.