43results about How to "Improving Imaging Results" patented technology

Disclosed herein is a computer-implemented method for improving a lithographic process for imaging a portion of a design layout onto a substrate using a lithographic projection apparatus, the method comprising defining a multi-variable cost function, the multi-variable cost function being a function of a stochastic effect of the lithographic process.

The invention relates to generating panoramic images of foreground and background panorama. Within mosaiced panoramic images there will often be more than one pixel value available for each pixel position. In the invention pixel values for a foreground panoramic image are selected by taking the most extraordinary pixel as foreground, and pixel values for a background image are selected by taking a median pixel value. We have found that such pixel selection gives improved results with respect to the prior art.

The invention discloses an ultrasonic array imaging method. The method comprises the following steps: performing wave beam forming processing according to signals collected by all array elements in an ultrasonic array, increasing the signal noise ratio of ultrasonic scanning line signals through space array gain, performing wavelet threshold denossing processing according to scanning line signals subjected to beam forming processing, performing envelope demodulation according to the ultrasonic scanning line signals subjected to wavelet threshold denossing processing, so as to envelopes of scanning signals, and performing image transformation processing on an image formed by scanning line envelope signals, so as to obtain a corrected scanned image. According to the invention, the wavelet deformation and ultrasonic array are combined, a wavelet threshold denossing method is adopted to further increase the signal noise ratio while the array space gain is obtained, the ultrasonic array imaging effect is greatly improved, and the testing performance of ultrasonic array to far field defects is improved.

The present invention relates to a method and also an imaging system to compensate for patient motion when recording a series of images in medical imaging, in which a number of images of an area under examination of a patient (17) are recorded at intervals with an imaging system (1) and are related to one another. With the method a localization system (2) is used as the series of images are being recorded to permanently or at a time close to the recording of the individual images, record a momentary spatial location of the area under examination in a reference system permanently linked to the imaging system (1), a first spatial location of the area under examination recorded close to the time of recording of a first image is stored, and a deviation of the images recorded momentarily in each case of the first spatial location is determined and by changing the geometrical circumstances of the imaging system (1) at a time to close the recording of the spatial location and/or through geometrical adaptation of an image content of an image just recorded, is at least approximately commentated for, so that the images show the area under examination in the same position and orientation. The method does not require any time-consuming interaction with the operator and is also suitable for compensating for larger movements of the patient.

A method for improving a lithographic process for imaging a portion of a design layout onto a substrate using a lithographic projection apparatus, the method including: calculating a discrete pupil profile based on a desired pupil profile; selecting a discrete change to the discrete pupil profile; and applying the selected discrete change to the discrete pupil profile. The methods according to various embodiments disclosed herein may reduce the computational cost of discrete optimization from O(aⁿ) to O(n) wherein a is constant and n is the number of knobs that can generate discrete change in the pupil profile.

The technical scheme of the invention proposes an airborne receiver motion error compensation model for a GNSS-R dual-base SAR imaging system. The airborne receiver motion error compensation model belongs to the field of navigation, and comprises block division of an imaging region and extraction of positional information thereof. When different PRN satellite signal targets pass a target point, GNSS signals received by an airborne receiver are processed in real time, a serial number of a satellite is extracted and combined with a satellite stellar map at the acquisition moment, azimuth and elevation angles of the satellite are calculated, and a direct reflection signal is subjected to correlation processing. Displacement deviation generated by the airborne receiver during actual operationis compared, and phase error compensation is completed by utilizing the airborne motion error compensation model. Through directly utilizing an actual callback signal time delay value, primary phase compensation is performed in an operation line-of-sight direction of the receiver, a range direction compression result is obtained by carrying out correlation processing on a direct signal, secondaryphase compensation is performed in the heading direction, azimuth Fourier transform is performed, a module value is obtained after decoupling, and an imaging result with high resolution of a target region is obtained.

The invention discloses an image processing method and device, a movable platform and a machine readable storage medium. The method comprises the steps of obtaining an original training image and a target image corresponding to the original training image (201); performing a decorrelation operation on the original training image to obtain a multi-channel training image (202); and training a presetneural network according to the multi-channel training image and the target image (203). The method has efficient imaging performance, a high-quality imaging result is obtained, and the use experience of a user is very good.

The invention provides a seismic data velocity interpolation method and system; the method comprises the following steps: obtaining a velocity value of the seismic data; using Cubic Convolution to carry out interpolation operation for the obtained velocity value; carrying out imaging process for the seismic data according to the velocity value after interpolation operation. The method and system can improve the velocity interpolation precision, thus improving imaging result, and more accurately reflecting subsurface structure lateral variations.

The invention discloses a DSN-based high-resolution two-dimensional ISAR imaging method. The method solves the problems that the 2D-FISTA algorithm has openness of optimal regularization term coefficient selection, a CV-DNN network lacks theoretical support and needs high space and time complexity, and DSN cannot solve the problems of main lobe width, high sidelobe and the like of an RD image. Themethod comprises the following implementation steps: obtaining wave number domain echoes in a two-dimensional matrix form and wave number domain echoes in a one-dimensional vector form of ISAR two-dimensional scattering point distribution; solving a one-dimensional vector form and a two-dimensional matrix form of two-dimensional scattering point distribution; building a DSN network; setting a loss function; performing DSN network training; and completing the ISAR high-resolution two-dimensional imaging based on the DSN. Based on a sparse signal reconstruction theory, an SALSA algorithm is constructed into a deep network, high-resolution two-dimensional ISAR imaging is realized, an ISAR image with good focusing and a clean background is obtained, and the method can be used for efficientlyperforming high-resolution two-dimensional ISAR imaging in batches in complex electromagnetic environments with target echo defects, noise and the like.

A three-dimensional (3D) seismic data set is divided into a plurality of 3D source wavefield subsets, each 3D source wavefield subset is stored in an array element of an array. For each array element,the associated 3D source wavefield is decomposed into a smaller data unit; data boundaries of the smaller data units are randomly shifted; a folding operation and a sample operator is applied to thesmaller data units to keep the smaller data units from overlapping; the folded smaller data units are smoothed to generate smoothed data; a quantization operation is performed on the smoothed data toproduce quantized data; and the quantized data is compression encoded to generate compressed data. The compressed data associated with each array element is decompressed to generate a 3D seismic output image.

The invention discloses a concrete member benchmark-free damage probability imaging positioning method which specifically comprises the following steps: S1, manufacturing a detected concrete member and intelligent aggregate sensors made of the same material, arranging an intelligent aggregate sensor array in the concrete member, and ensuring to cover a to-be-detected area of the structure; s2, each path intelligent aggregate in the array intelligent aggregates sequentially serves as a driver, ultrasonic longitudinal wave signals meeting the excitation requirement are loaded through a signal generator and a power amplifier, other intelligent aggregates serve as sensors to collect ultrasonic longitudinal wave focusing signals which are directly received and subjected to time inversion processing, and structural response is reflected; and S3, response signals directly received by similar sensing paths. The invention relates to the technical field of structural health monitoring. According to the non-benchmark damage probability imaging positioning method for the concrete member, the number of used sensors is reduced, and rapid, stable, effective, safe and accurate recognition and positioning of member damage are achieved.

The invention discloses a compressive sensing imaging device and a compressive sensing imaging method. The compressive sensing imaging device comprises a carrier, a PSF (Point Spread Function) measuring system and an imaging system, wherein the PSF measuring system and the imaging system are arranged on the carrier. Due to adoption of the PSF measuring system, a first light beam emitted from a first light source passes through air/a water body and is received by a first photoelectric detection unit, then energy distribution information of a light spot affected by a PSF is received, a frequencyspectrum value of the PSF of the air/water body in a specific distance is calculated by a PSF calculation unit according to energy distribution of the light spots emitted from the first light sourceand energy distribution information of light spot imaging detected by the first photoelectric detection unit, a frequency spectrum value of the PSF of the air/water body corresponding to an imaging unit is calculated through a central processing unit, a micro lens in a spatial light modulator is adjusted according to the frequency spectrum value, then light intensity distribution to a detection target from the micro lens is identical to an original modulation matrix, and thus the influence of the PSF is inhibited.

An individualized imaging method, comprising the following steps: scanning an imaging subject mould; conducting calibration, rectification and optimization on the imaging system according to the information obtained after mould imaging; scanning the imaging subject with the calibrated, rectified and optimized imaging system; optimizing information obtained by scanning the imaging subject and the mould thereof to obtain higher quality imaging results and data analysis results; and applying the higher quality imaging results and data analysis results to optimize the mould for use in the next imaging. The individualized imaging method fully utilizes a priori knowledge, establishes a mould for an individual and uses the image data information of the mould to conduct calibration, rectification and optimization on the imaging system, and optimizes the image data information of the imaging subject, and further optimizes the mould. By repeating the above steps, the present invention can obtain higher quality imaging results and data analysis results.

A computer-implemented method for simulating a scattered radiation field of a patterning device including one or more features, in a lithographic projection apparatus, the method including: determining a scattering function of the patterning device using one or more scattering functions of feature elements of the one or more features; wherein at least one of the one or more features is a three-dimensional feature, or the one or more scattering functions characterize scattering of incident radiation fields at a plurality of incident angles on the feature elements.