55 results about "Spectral structure" patented technology

Information is encoded in an image signal by exploiting spectral differences between colors that appear the same when rendered. These spectral differences are detected using image sensing that discerns the spectral differences. Spectral difference detection methods include using sensor-synchronized spectrally-structured-light imaging, 3D sensors, imaging spectrophotometers, and higher resolution Bayer pattern capture relative to resolution of patches used to convey a spectral difference signal.

The invention discloses an LED device and light source with a sunlight visible light part spectrum structure. The LED device comprises a blue LED chip or blue fluorescent powder, thereby mixing cyan,red, green and orange spectrum components into an emission spectrum of the LED device by using cyan fluorescent powder, green fluorescent powder, orange fluorescent powder and red fluorescent powder to obtain white light. Compared with the prior art, the LED light source has sunlight emission spectrum configuration, does not contain an ultraviolet or infrared spectrum component and is a healthy light source; the white LED device is packaged by adopting a four-primary color or five-primary color technical scheme, and different from a traditional three-primary color concept and a two-primary color technical scheme adopted for early LED packaging, the four-primary color or five-primary color technical scheme has the advantages that the condition that the most important cyan spectrum componentwith a wavelength range of 480-520nm in a solar spectrum needs to be added is emphasized; the environment-friendly, green and energy-saving requirements are met; and the human health requirements arealso met.

The invention belongs to the technical field of remote sensing data processing, and particularly discloses a mixed pixel decomposition method based on geometric spatial spectral structure information, so as to solve the problems that classifications of hyper-spectral image mixed pixel point surface features are not distinct and distribution is not accurate. The method comprises steps: 1) hyper-spectral data are inputted, and the data are arranged in a matrix after pretreatment; 2) a VD method is used for estimating the number of pure end members; 3) an edge contour of the image is extracted; 4) a formula for computing a spatial distance is brought forward according to the edge and the position; 5) a formula for computing a spectral distance is brought forward according to spectral statistic information; 6) a geometric spatial spectral binding term is built according to the spatial distance and the spectral distance, and the binding term is added to an NMF model; and 7) an output end member matrix and an abundance matrix are unmixed in new NMF algorithm, and the scene surface feature classifications and the distribution ratio are judged. The method is well applicable to different hyper-spectral data, and compared with the prior method, the precision of mixed pixel decomposition is improved, and great value is provided for target detection and recognition.

Generating electrode stimulation signals for an implanted electrode array is described. An acoustic audio signal is processed to generate band pass signals which represent associated bands of audio frequencies. Macro bands are defined, each of which characterizes multiple band pass signals. The macro bands are processed in a sequence of sampling intervals. For each sampling interval, the processing includes: i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals. The stimulation event signals are weighted with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array.

Information is encoded in an image signal by exploiting spectral differences between colors that appear the same when rendered. These spectral differences are detected using image sensing that discerns the spectral differences. Spectral difference detection methods include using sensor-synchronized spectrally-structured-light imaging, 3D sensors, imaging spectrophotometers, and higher resolution Bayer pattern capture relative to resolution of patches used to convey a spectral difference signal.

A method for correcting an X-ray diffraction (XRD) profile measured by an X-ray diffraction imaging (XDi) system is provided. The XDi system includes an anode, a detector, and a control system. The method includes obtaining an emission spectrum of the anode using the control system. The emission spectrum includes spectral structures. The method further includes calculating a piecewise spectral-correction function using the spectral structures in the emission spectrum, obtaining a measured spectrum of an object, and applying the spectral-correction function to the measured spectrum to generate a spectrally-corrected measured spectrum.

Orthogonal frequency division multiplexing (OFDM) receiver embodiments of the invention provide timing misalignment estimation by calculating the intra-baud timing differential. The preferred method exploits the spectral structure of the short-preamble in that a time delay in the time-domain is manifest as a phase rotation in the frequency-domain. The timing misalignment is determined by special processing the spectral peaks of the modified short-preamble. An alternative embodiment linearly combines the two long-preamble symbols to construct a single “best estimate” long-preamble symbol. A normalized dot product of the “best estimate” long-preamble symbol and the ideal on-baud symbol is computed to obtain the magnitude of the timing misalignment. A dot product between the “best estimate” long-preamble symbol and the time derivative of the ideal on-baud sampled sequence is computed to obtain the sign of the timing misalignment.

Generating electrode stimulation signals for an implanted electrode array is described. An acoustic audio signal is processed to generate band pass signals which represent associated bands of audio frequencies. Macro bands are defined, each of which characterizes multiple band pass signals. The macro bands are processed in a sequence of sampling intervals. For each sampling interval, the processing includes: i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals. The stimulation event signals are weighted with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array.

A method for correcting an X-ray diffraction (XRD) profile measured by an X-ray diffraction imaging (XDi) system is provided. The XDi system includes an anode, a detector, and a control system. The method includes obtaining an emission spectrum of the anode using the control system. The emission spectrum includes spectral structures. The method further includes calculating a piecewise spectral-correction function using the spectral structures in the emission spectrum, obtaining a measured spectrum of an object, and applying the spectral-correction function to the measured spectrum to generate a spectrally-corrected measured spectrum.

The invention discloses a blind deconvolution infrared spectrogram super-resolution restoration method. The method comprises the steps of performing normalization processing on infrared spectral data; calculating a first-order derivative of spectral intensity after normalization; estimating the noise intensity of a spectrum according to the first-order derivative of the spectrum so as to determine the value of a regularization parameter; establishing an infrared spectrum model; and solving a high-resolution infrared spectrum by utilizing a Huber-Markov field, a spectral deconvolution algorithm and an alternating minimum optimal iteration algorithm. According to the method, noise suppression is enhanced in a flat region of the spectrum, and spectral structure preservation is enhanced in a steep region of the spectrum; for the used Fourier infrared spectrum, the spatial-domain iterative blind deconvolution algorithm is good in effect; when a signal-to-noise ratio is higher than 30 dB, the spectral resolution is increased by about 30%; and priori knowledge of Huber-Markov adaptive constraints is effectively utilized, the application of the infrared spectrum to the fields of target detection and identification as well as agriculture, biology, medical science, meteorology, space technology and petrochemical industry is promoted, and technical support is provided.

The invention discloses a backlight module of an LED liquid crystal display. The module includes a backplane and an LED light source assembly mounted in the backplane, wherein the LED light source assembly comprises a plurality of LED lamp strips, and each LED lamp strip comprises a base plate and a plurality of LED luminous bodies uniformly arranged on the base plate; each LED luminous body includes a bracket, a copper foil bonding pad mounted in the bracket, a red LED chip, a green LED chip, a blue LED chip, two or multiple bonding pads and package resins which package each LED chip in the bracket; the red LED chip is arranged on one bonding pad, and the green LED chip and the blue LED chip are connected in parallel, and arranged on another bonding pad or respective bonding pads. The backlight module can effectively send out a spectral structure which adapts to the requirement of a liquid crystal TV panel, provide the backlight energy supply of LED TV wide color gamut, improve the overall transmittance of an LED liquid crystal TV, improve the depth of field of the liquid crystal TV, reduce the power consumption of backlight, enhance the color contrast and solve other technical problems.

The inventive analog light source consists of an adjustable constant-current monochromatic LED array and a programming unit. LEDs of each unit are arranged in the central symmetry or the cross symmetry. The integral LED array is arranged with the monochromatic LED units. The programming unit can program as a specific spectrum structure, light intensity and its specific changing process and can be both a continuous output and a pulse output to be suitable for the needed measuring process, so it can be used for the spectral response measurement of the photosensitive element, the standard test of the solar cell and the spectral sectionalization test of the multifunction solar cell.

The invention relates to a system for detecting light color and spectrum of a light-emitting diode (LED) fluorescent material and a method of the system, and belongs to optical instruments. By performing mutual calculation or synthesis (analysis) on various spectra through an analysis device which comprises a spectrum loading unit, a spectrum synthesis unit, a spectrum calculation unit, a spectrum storage unit and a chromaticity coordinates generation unit, the conversion efficiency, light color characteristic quantitative spectrum and light color of the LED fluorescent material can be detected in a direct and nondestructive manner without changing any type of the LED fluorescence test sample. Besides, poor-quality LED fluorescent materials are blocked from entering the production, to reduce the reject rate of light color products; and the white-light LED optical and spectral structures are fully simulated, and the white-light LED spectrum of the test sample is entirely separated to form an induced blue light spectrum and a fluorescence spectrum, which are independent from each other.

The invention provides a color measurement apparatus. The color measurement apparatus comprises an integrating sphere, an illumination apparatus and an optical measurement apparatus, and is characterized in that the illumination apparatus comprises one or more halogen tungsten lamp illumination units taking halogen tungsten lamps as light emitting sources and one or more LED illumination units taking LED light sources as light emitting sources. The spherical wall of the integrating sphere is provided with one or more illumination windows, and light emitted from the halogen tungsten lamp illumination units and the LED illumination units is incident to the integrating sphere through the same illumination window or different illumination windows. According to the invention, through combining the LED light sources with the halogen tungsten lamps, a spectrum from within an UV scope to an infrared large-wave-band scope is enabled to have sufficient spectral energy distribution, spectrum structure design of illumination light is also facilitated, the spectrum demands for color measurement of various samples are greatly satisfied, and the color measurement apparatus has the advantages of simple operation, flexibility, adjustability and low loss.

The invention relates to an audio Doppler characteristic quantification-based gesture identification method and belongs to the field of man-machine interaction. By utilizing a general audio playing and receiving device, a Doppler effect of an audio signal is extracted to realize gesture identification. The method comprises the steps of firstly playing the audio signal with a certain frequency by a loudspeaker; capturing the audio signal reflected by a human body through a microphone; forming an eigenvector set by extracting a fine spectral structure after Doppler frequency shift; and realizing gesture identification classification through gesture primitive segmentation and an HMM. The gesture identification precision is extremely high and the gesture types are rich; the difficulty of incapability of accurately identifying gestures with same absolute distance paths in a previous audio Doppler gesture identification technology is overcome; the calculation is simple; the practicality is high; and the method can be widely applied to the fields of somatosensory interaction, virtual reality, smart home and the like.

The invention discloses a hyperspectral image compression method based on non local and low-rank decomposition. Non local similarity is used for partitioning the hyperspectral image, hyperspectral small blocks with the same size are acquired; and then, according to the similarity, similar blocks are gathered in one class, four-order data formed by blocks in the same class can be subjected to low-rank decomposition. As the size of the decomposed data is far smaller than that of the original data, compression of the hyperspectral data is thus realized, and the spatial structure characteristics and the spectral structure characteristics of the hyperspectral data are made full use of.

The invention relates to the technical field of infrared spectroscopy wavelength, and more specifically, relates to a novel infrared spectroscopy wavelength selection method based on sparse Bayesian study. The sparse optimized wavelength selection method utilizes the spectral structure priori knowledge and the related priori knowledge of co-linearity between spectrums. The provided method has the advantages of little calculation quantity, few adjustable parameters, and strong robustness. For the first time, the spectral structure priori knowledge and the related priori knowledge of co-linearity between spectrums are utilized, and the spectral partitioned sparse structure can be determined in a self-adapting mode. Then sparse Bayesian study algorithm is adopted to calculate out the optimal solution of the sparse optimization problem so as to screen out the best wavelength point combination. The provided method can be widely applied to the field of solid-phase / liquid-phase / gas-phase infrared spectrum wavelength selection.

The invention provides a method for synthesizing a jolkinolide A component and a jolkinolide B component which serve as main active components of a traditional Chinese medicine euphorbia fischeriana. The natural jolkinolide A and B is obtained by simple and high-efficiency synthesis through a series of chemical reactions by taking low-cost and readily-available p-13,19-dyhydroxyl kaurene; a preparation condition, a preparation process and important spectral structures and physical property data of all midbodies and target compounds are supplied.

The invention provides a laser frequency shifter based on multi-frequency phase modulation and a frequency shift method, belonging to the optical technical field. The laser frequency shifter comprisesa laser source with narrow linewidth, an electro-optical modulator, a band-pass filter, a spectrum measuring system, an arbitrary waveform generator and a radio frequency signal amplifier.The methodof the invention comprises the following steps: firstly, the single-frequency signal output by a laser source with narrow linewidth is imported into an electro-optical modulator; then, the waveform ofthe multi-frequency modulated electric signal is obtained based on the reverse calculation of the spectrum analysis, and the arbitrary waveform generator is set to generate the corresponding multi-frequency modulated electric signal. At first, that modulate electric signal is amplified by a radio frequency signal amplify and transmitted to an electro-optical modulator; outputting the modulated optical signal to a band pass filter for frequency shifting; finally, the spectral structure is analyzed by the spectral measurement system. The invention solves the problems of low power utilization ratio of the prior art signal and complex equipment structure. The invention can be applied to wireless communication and optical fiber sensing.

The invention provides a speech separation method for a single microphone based on an NMF (Non-negative Matrix Factorization) algorithm. According to the method, a lot of small dictionary matrixes anda state sequence are obtained in allusion to training data of each speaker so as to simultaneously describe spectral structure information and time continuity of speech signals; in allusion to different frames of mixed speeches, the algorithm provided by the invention adopts different small dictionary matrixes to describe the amplitude spectrum of each frame of speeches compared with the traditional algorithm which adopts a large dictionary matrix, thereby avoiding the occurrence of a phenomenon that the dictionary of one speaker describes speech information of another speaker, and improvingthe robustness and voice separation effect of the algorithm.

The invention provides a stereo image display device comprising a display panel, a stiffened plate and a spectral structure layer. The stiffened plate is selectively attached to at least one surface of the display panel to enhance the anti-bending and anti-deforming capabilities of the display panel. When the stiffened plate is attached to the display surface of the display panel, the stiffened plate is necessary to have light transmittance, and the rigidity of the stiffened plate is greater than that of the display panel so that the stiffened plate can support the display panel to keep the shape of the display panel and avoid the display panel from being bent after the stiffened plate is attached to the surface of the display panel. The spectral structure layer is arranged corresponding to the display surface, and a gap is clamped between the spectral structure layer and the display panel to form an air layer. The image display device has stabler stereo image output effect.

The invention relates to a dual-rate DML device, a module and a calibration method, which belongs to the technical field of optical communication. The invention particularly relates to the dual-rate DML device with a built-in signal calibration circuit, the module and the calibration method. According to the invention, the signal calibration circuit is added into the device; PD pre-configuration is realized through a novel spectral structure; the control structure of a sequence-sharing multi-channel serial signal is used to feed back a monitoring signal to an electric drive to adjust drive current; the problem of crosstalk between backlight monitoring is reduced; and high-quality signal output under 25Gbps and 28Gbps dual modulation frequency is realized.

The invention discloses an atmospheric correction method for detecting the radiation intensity of missile tail flame. The method comprises the following steps: acquiring the atmospheric transmissivity, calculating the statistic weight of the spectral structure of the missile tail flame in the atmospheric correction process, and carrying out atmospheric correction on the radiation intensity of the missile tail flame, wherein the waveband of the missile tail frame is 4-5 [mu]m. The method effectively improves the body radiation precision of a thrust reverser.

A signal processing system is described for a cochlear implant. A pre-processor filter bank processes an acoustic audio signal to generate band pass signals which represent associated bands of audio frequencies. An information extraction module defines macro bands, each of which characterizes multiple band pass signals, and processes the macro bands in a sequence of sampling intervals. For each sampling interval the information extraction module processing includes: i. extracting timing and energy information from each band pass signal to form requested stimulation events, ii. decimating the requested stimulation events to select a maximum energy band pass signal within each macro band, and iii. decimating each selected band pass signal based on a pulse selection inhibition function and preserving temporal and spectral structures of the band pass signals so as to generate stimulation event signals. A pulse weighting module weights the stimulation event signals with a weighting matrix reflecting patient-specific pitch perception characteristics to produce output electrode stimulation signals to the implanted electrode array.

The invention provides a single side band frequency spectrum production method and device based on multi-frequency phase modulation, and relates to a single side band frequency spectrum production device and method. The device comprises a laser source with narrow linewidth, an electrooptical modulator, an optical spectrum measurement system, an arbitrary waveform generator and a radio frequency signal amplifier; the method comprises the following steps: step one, importing a single frequency signal output by the laser source with narrow linewidth to the electrooptical modulator; step two, reversely calculating based on optical spectrum analysis to obtain a multi-frequency modulation electric signal waveform, setting the arbitrary waveform generator to produce the corresponding multi-frequency modulated electric signal; step three, amplifying the modulation electric signal through the radio frequency signal amplifier, and then transmitting the amplified modulation electric signal to theelectrooptical modulator; and step four, outputting an optical signal formed after modulation to the optical spectrum measurement system to perform the optical spectrum structure analysis. The production device and method provided by the invention solve the problems that the signal energy conversion efficiency is low and the structure is complicated in the prior art. And the device and method canbe applied to the wireless communication.

In a solution polymerization process the increase in gel content in the solution at one or more locations may be detected by monitoring the structure of a spectrum obtained by analyzing the reaction at said one or more locations using a spectrometer selected from the group consisting of infrared spectrometers, near infrared spectrometers and Raman spectrometers.

The invention discloses a wide-blue spectrum excited full-spectrum plant growth lighting lamp bead which comprises a lamp bead bracket and a chip group, wherein the chip group is formed by multiple chips with different light-emitting wavelengths; the chip group comprises a blue-violet LED chip and a blue LED chip; the blue-violet LED chip and the blue LED chip are packaged on the lamp bead bracket through multi-chip die bonding; composite fluorescent powder coats the outside of the chip group; and the composite fluorescent powder comprises combination of two or more of YAG, LuYAG, GaYAG, nitric oxide and nitride fluorescent powder. A wide-blue spectrum structure and a blue light-excited spectrum structure for emitting light through the fluorescent powder can fully meet the requirement of promoting facilitation of plants at flowering and fruiting stages through the wave bands of spectrums absorbed by the growth elements, such as chlorophyll and carotenoid, in plant growth when the lamp bead is electrified.

The present invention discloses an analysis method, system and storage medium of lithology and oil and gas containing properties of reservoirs, by getting spectral structure modes of logging signals of different lithological bands and different oil and gas containing strata with CWTFT algorithms from frequency spectral structural relationships between different chords in music by analogy; summarizing features of spectral structure modes of same lithology in different wells, and getting a spectral change law of rocks, and identifying lithology of unknown rocks; and analyzing characteristics of reservoirs from identified lithology, finding and comparing spectral change characteristics of oil and gas strata in different wells to predict oil and gas reservoirs. The present invention combines spectral response characteristics of logging curves of different lithology, improves accuracy and efficiency of lithology and reservoir features interpretation work and provides new theoretical support and practical experience for deep oil and gas reservoir prospection and development.

The invention discloses a multi-wavelength signal dispersion separation method by using defective one-dimensional photonic crystals and relates to the field of spectral measurement. Based on photonic band gap and defect filter characteristics of the one-dimensional photonic crystals, by introducing double-prism defect layers into perfect one-dimensional photonic crystals to enable the thickness of the double-prism defect layers to be varied continuously, different positions correspond to different defect structures, a one-to-one corresponding relationship is formed between the output spectral lines and input and output positions, a characteristic of frequency separating is realized on multi-wavelength electromagnetic waves and a superfine spectral structure is formed. The one-dimensional photonic crystal double-prism defect dispersion separator has very high spectral resolution and can be used on devices such as wave separators and spectrographs; and at the same time, by adopting a thin film preparation technology, the one-dimensional photonic crystal double-prism defect dispersion separator can be integrated with other devices and the preparation technique is mature.

The invention provides an LED lighting fixture for a home plant factory. According to the LED lighting fixture, the requirements of being conducive to human visual comfort can be met, and the spectralstructure of the light source and the number of photons can also be adjusted. Moreover, many advantageous effects not available in the prior art can be achieved by adjusting the number ratio of the red and blue photons to 9:1 which is favorable for the growth of vegetable and crop.