33 results about "Nonlinear scaling" patented technology

Methods and apparatuses for automated conversion of color images to aesthetically enhanced gray scale images. In one embodiment, the mix of color channels of a color image is automatically determined as a result of analysis of the image for the generation of a gray scale image. In one example, the data of a color channel (e.g., Blue) that is not suitable for a gray scale representation is not used. The adjustment strength depends on the image itself. In one example, a stronger color channel is automatically weighted less than a weaker color channel for enhancement. In one example, after the contrast is further strengthened through nonlinear scaling, the boundary portion of the image is darkened to strengthen the edges and draw attention to the center of the image. Optionally, an attractive color balance adjustment is also made according to the gray levels to further enhance the appearance.

Methods and apparatuses for nonlinear scaling of video images. To match the aspect ratios of a video image and the target display area, at least one embodiment of the present invention scales the video image according to one or more nonlinear functions along the horizontal direction and / or the vertical direction. In one embodiment, the nonlinear functions are such that the original aspect ratio of the video image is preserved near the center region (or strip) of the image and the image is gradually stretched (or compressed) as it is mapped to the edges. In one example, the scaling is implemented by the texture mapping functionality of OpenGL using graphics hardware. In one embodiment of the present invention, the nonlinear mapping is constructed according to a polynomial mapping; and, the coefficients of the polynomial are adjustable by a user to trade off distortion between the image center and the image edges, giving the user control over the location and the amount of distortion.

A system and method for visualizing and navigating dynamic documents including data from an ongoing process and including instances of specified search terms. A summary view including a condensed abstract representation of a dynamic document provides a global overview of the distribution of search terms. The invention updates the document and aggregates the instances of search terms when the representation includes a nonlinear scale or uses multiple display regions having different resolution levels. The invention supports rapid skimming of dynamic documents and dynamic document collections, including enhancements triggered by cursor brushing, while keeping the user in context. Navigation to a segment of the dynamic document by selecting a corresponding portion of the summary view can replace the use of conventional scrolling techniques.

Methods and apparatuses for nonlinear scaling of video images. To match the aspect ratios of a video image and the target display area, at least one embodiment of the present invention scales the video image according to one or more nonlinear functions along the horizontal direction and / or the vertical direction. In one embodiment, the nonlinear functions are such that the original aspect ratio of the video image is preserved near the center region (or strip) of the image and the image is gradually stretched (or compressed) as it is mapped to the edges. In one example, the scaling is implemented by the texture mapping functionality of OpenGL using graphics hardware. In one embodiment of the present invention, the nonlinear mapping is constructed according to a polynomial mapping; and, the coefficients of the polynomial are adjustable by a user to trade off distortion between the image center and the image edges, giving the user control over the location and the amount of distortion.

The invention provides a nonlinear image scaling method and a nonlinear image scaling system, comprising: a space position computation module for an interpolation point in the vertical direction which is provided and used for determining an exact interpolation position of a current point being reflected to the vertical direction of the prior image; a scaling factor which is provided and used by the computation module for computing the scaling factor k, and a space position computation module for the interpolation point in the horizontal direction which is provided and used for computing a position in the horizontal direction according to different positions of various points in the prior image and by adoption of segmented nonlinear means; an interpolating module which is provided and used for implementing interpolation according to computed results by the segmented nonlinear means. The method and the system of the invention adopt segmented nonlinear scaling, thereby aspect ratio of the prior image can be maintained by an intermediate important section; moreover, a left borderland and a right borderland adopt scaling factors with different scales, thereby no great distortion exists when an image is converted onto a target screen with different aspect ratios, and the invention is particularly suitable for playing video programs.

The invention belongs to the radar signal processing field, and discloses a missile-borne SAR imaging system architecture design based on a single-chip FPGA. The single-chip FPGA comprises a processing module PS and a programmable logic module PL; the PS module is provided with a double-core ARM and a DDR storage device; the PL module is internally provided with an FPGA module, a RAM module and a DMA module; the FPGA module is used for obtaining an intermediate frequency digital echo signal, performing digital down-conversion and range direction pulse compression and storing the result in the RAM module. The core 0 of the ARM successively performs Doppler center estimation, distance moving correction, distance bending correction and Doppler frequency modulation estimation on the distance pulse compression image. The FPGA module performs motion error compensation, azimuth nonlinear scaling and azimuth pulse compression on the image after distance direction correction. The core 1 of the ARM performs multi-view processing and quantification processing on the azimuth pulse compression image to obtain an SAR image data.

The present invention relates to image processing technologies, and discloses an image scaling method and apparatus to reduce distortion of a scaled image. The image scaling method includes: determining a distribution direction of main objects in a source image; and scaling the source image to a target image through a nonlinear scaling method according to the distribution direction of the main objects in the source image, where the nonlinear scaling method employs a scaling direction vertical to the distribution direction of the main objects in the source image. The embodiments of the present invention are primarily applicable to the image scaling field.

The invention discloses a stretching nonlinear scaling method for imaging processing of a forward squint-looking sub-aperture of synthetic aperture radar, which belongs to the technical field of the imaging of the synthetic aperture radar. The method comprises the steps of: carrying out range distance processing on sub-aperture echo data acquired by the synthetic aperture radar under the forward squint-looking condition by adopting a nonlinear scaling method; describing the phase characteristic of an echo signal in a range-doppler domain by adopting a third-order model and compensating the change of the range distance modulating frequency so as to realize range distance focusing; and then carrying out azimuth processing by adopting a frequency spectrum analysis method to realize imaging of the forward squint-looking sub-aperture of the synthetic aperture radar. The method has good imaging consistency and reduces calculated quantity of imaging processing.

A system and method are provided for displaying a data series. In one embodiment, a graphical interface is provided including at least one axis that is divided into a plurality of axis regions. Preferably, each axis region uses a different linear scale, and the plurality of axis regions forms a continuous non-linear scale. The graphical interface also displays the data series in relation to the plurality of axis regions, and the data series is plotted in relation to each axis region based on a scale resolution corresponding to each respective axis region.

Methods and apparatuses for automated conversion of color images to aesthetically enhanced gray scale images. In one embodiment, the mix of color channels of a color image is automatically determined as a result of analysis of the image for the generation of a gray scale image. In one example, the data of a color channel (e.g., Blue) that is not suitable for a gray scale representation is not used. The adjustment strength depends on the image itself. In one example, a stronger color channel is automatically weighted less than a weaker color channel for enhancement. In one example, after the contrast is further strengthened through nonlinear scaling, the boundary portion of the image is darkened to strengthen the edges and draw attention to the center of the image. Optionally, an attractive color balance adjustment is also made according to the gray levels to further enhance the appearance.

The invention discloses a sub-aperture large squint SAR imaging processing method based on time-varying scales, and belongs to the technical field of radar signal processing; specifically, the methodcomprises the steps of firstly establishing a large squint SAR imaging geometric model; then, performing range walk correction in a range frequency domain, and performing range-to-range pulse pressure-range warp correction-secondary range pulse pressure in a two-dimensional frequency domain; and finally, introducing a predistortion compensation factor in an azimuth time domain, introducing a nonlinear scaling varying factor in a range-Doppler domain and introducing a Deramp slope removal factor in a range time domain to complete azimuth pulse pressure, so that two-dimensional focusing in the range-Doppler domain is realized. An inclined plane SAR image obtained by the sub-aperture large squint SAR imaging processing method has no geometric distortion, and can reflect ground scene information more truly, thereby increasing the usability of the inclined plane image; and the operation amount is not increased.

A method and a device are disclosed for improving visual recognition in medical images with a large brightness range. This can be done, for example, by electronic manipulation of the represented brightness values, wherein the image has regions with essentially two different brightness intervals. By application of nonlinear scaling, followed by contrast enhancement and subsequent resealing of the image values, structures are represented with a richer contrast without having to tolerate quality losses in the region of originally strong contrasts.

The invention discloses an imaging method of a missile-borne arc diving large squint TOPS SAR. The imaging method mainly solves the problems of azimuth spectrum aliasing and target Doppler center nonlinearity caused by inclined superposition on a maneuvering platform through SAR imaging under large strabismus of a maneuvering track in the prior art. Aiming at azimuth aliasing, the invention provides the imaging method based on joint time domain dechirping. The method comprises the steps: acquiring an expanded two-dimensional spectrum by improved time domain linear dechirping; in a two-dimensional frequency domain, after range migration correction is carried out, acquiring a signal aligned with a target time-frequency line through Doppler domain nonlinear dechirping; eliminating the space-variant property of space-variant Doppler parameters through frequency domain nonlinear scaling; completing the azimuth focusing through the SPECAN technology; and finally, verifying the effectivenessof the proposed algorithm through simulation and actual measurement of TOPS SAR data. Through the necessary adjustment, the algorithm can be applied to sliding bunching and bunching SAR installed on amaneuvering platform.

A method is provided for reducing a height of a font character in a nonlinear scaling process. The method includes reducing the height of the character by interacting with hinting instruction to adjust relevant instructions to thereby reduce the overall height of a font character while preserving as much of the integrity of the character as possible. The method includes an iterative process which selectively removes various pixels, defining an outline of a font character while maintaining a removal criteria, which results in a nonlinear height reduction in order to produce a font of a desired height.

Blood pressure measurements are represented aurally. An audio synthesizer (15) receives a signal representative of blood pressure information, and synthesizes an audio output from the signal. Both the duration and pitch of the synthesized audio output are dependent on the value of the blood pressure information, according to a linear scale or a non-linear scale such as stepped scale. The blood pressure information includes at least one of arterial or pulmonary arterial systolic, diastolic and mean blood pressure measurements, and the audio output includes an earcon comprising a tone or sequence of tones, the tone(s) being representative of a respective type of blood pressure measurement. The earcon may also include one or more static or dynamic beacons.

The present invention relates to image processing technologies, and discloses an image scaling method and apparatus to reduce distortion of a scaled image. The image scaling method includes: determining a distribution direction of main objects in a source image; and scaling the source image to a target image through a nonlinear scaling method according to the distribution direction of the main objects in the source image, where the nonlinear scaling method employs a scaling direction vertical to the distribution direction of the main objects in the source image. The embodiments of the present invention are primarily applicable to the image scaling field.

A unique hash representing patient omics data is constructed using results for known SNP positions and their respective allele frequencies in the patient's omics data. In most preferred aspects, the known SNP positions are selected for specific factors (e.g., ethnicity, sex, etc.) and the allele fraction is represented in values of a non-linear scale. Typically, the hash comprises a header / metadata relating to the known SNP positions and non-linear scale and further includes the actual hash string.

The invention discloses an image scaling processing method based on Newton three-association continuous fraction mixed rational interpolation, and belongs to the technical field of graphic image processing. Reading an input image which needs to be zoomed; segmenting the image matrix into a plurality of small matrixes with three rows and three columns; an edge matrix of the image is processed, wherein enough row number or column number is moved forwards, and three rows and three columns are adjusted; performing interpolation calculation on all the small matrixes through loop control; and generating a new image matrix, and displaying a processing result. A zooming result of a traditional linear method is obviously fuzzy at details, and a mosaic phenomenon exists when the magnification timesare large. Compared with a traditional method, the edge and texture of the method are obviously improved, and a good visual effect is guaranteed. Through clear scaling result comparison, the progressof nonlinear scaling in the aspect of visual effect compared with traditional scaling is highlighted, the feasibility of nonlinear scaling is proved, and the texture effect of the image can be well kept through image scaling.

The invention relates to an imaging methodof a missile-borne large-squint small-aperture multi-channel SAR, and the method comprises the steps: firstly compensating a scene center non-space-variant multi-channel phase difference in a distance frequency domain, then compensating a space-variant channel phase difference item in a distance time domain, carrying out the reconstruction of a multi-channel signal in a distance time domain azimuth frequency domain so as to eliminate blur existing in multiple channels; In a two-dimensional frequency domain, distance migration correction is carried out, a target range focusing signal is obtained through improved Stolt interpolation, meanwhile, aliasing of the signal in an azimuth time domain is eliminated through azimuth time spectrum compression, space-variant characteristics of Doppler parameters are eliminated through frequency domain nonlinear scaling, and azimuth focusing is completed through the SPECAN technology. The method can better adapt to a high-maneuverability movement track with multiple channels in real time, and solves the problem that joint processing cannot be carried out due to phase difference between the channels.

The invention discloses a time-frequency scale changing curve track bistatic foresight SAR imaging method, and mainly solves the problem that in the existing curve track bistatic foresight SAR imaging technology, parameter space-variant is serious, so that an image edge region cannot be focused at high resolution. According to the implementation scheme, the method comprises the following steps: acquiring a curve track bistatic forward-looking SAR echo signal, and performing range walking correction and second-order wedge-shaped time-frequency transformation on the echo signal; performing high-order migration correction and distance compression on the signals after time-frequency transformation, and completing distance direction processing of the echo signals; and constructing a high-order disturbance factor and a nonlinear scaling factor based on an azimuth space-variant model to reconstruct a signal azimuth frequency spectrum after range processing, obtaining echo signals with consistent Doppler parameters, and performing unified focusing on the echo signals to obtain a focused SAR image. According to the method, the edge region focusing depth of the curve track bistatic foresight SAR imaging image is improved, the image quality is improved, and the method can be used for foresight high-resolution detection.

A method of displaying blood glucose information may include monitoring blood glucose levels of a user, where the blood glucose levels include at least a current blood glucose level and a historic blood glucose level. The method may also include presenting the current blood glucose level using a point indicator along an approximately horizontally centered axis based on a non-linear scale, and presenting the historic blood glucose level and a predicted future blood glucose level on the display as a single smoothed curve passing the point indicator.

The invention discloses an enhanced ADC-based DSP+FPGA dual-base forward-looking SAR imaging method. It includes the following steps: Step 1. Use the enhanced ADC to sample and digitally down-convert the echo intermediate frequency analog signal to obtain complex baseband data and transmit it to the FPGA; Step 2. Perform range compression, distance walking and FDC correction on the complex baseband data , bending correction and residual migration correction, get the processed data in the range direction, and send it to the DSP; Step 3. Perform high-order polynomial fitting, nonlinear scaling in the azimuth direction, high-order phase filtering in the azimuth direction, deskewing in the azimuth direction, and geometry Correction processing; forming ground distance map. The invention also discloses a dual-base forward-looking SAR imaging device based on enhanced ADC DSP+FPGA, which includes an enhanced analog-to-digital converter, FPGA and DSP, and also includes a network port chip. The invention makes full use of the digital down-conversion function of the analog-to-digital converter, the high-efficiency parallel feature of the FPGA, and the powerful floating-point computing capability of the DSP for large data volumes, and realizes high-resolution imaging of the dual-base forward-looking SAR.

The invention discloses a stretching nonlinear scaling method for imaging processing of a forward squint-looking sub-aperture of synthetic aperture radar, which belongs to the technical field of the imaging of the synthetic aperture radar. The method comprises the steps of: carrying out range distance processing on sub-aperture echo data acquired by the synthetic aperture radar under the forward squint-looking condition by adopting a nonlinear scaling method; describing the phase characteristic of an echo signal in a range-doppler domain by adopting a third-order model and compensating the change of the range distance modulating frequency so as to realize range distance focusing; and then carrying out azimuth processing by adopting a frequency spectrum analysis method to realize imaging of the forward squint-looking sub-aperture of the synthetic aperture radar. The method has good imaging consistency and reduces calculated quantity of imaging processing.

Systems, devices, and methods are described that include applying non-linear scaling to a current image frame and a reference image frame to generate at least a corresponding current image layer and a corresponding reference image layer. Hierarchical motion estimation can then be performed using the non-linearly scaled image layers. Further, the source block size may be adaptively determined in the downsampled image layer, and hierarchical motion estimation may be performed using the adaptively sized source block.

The invention belongs to the radar signal processing field, and discloses a missile-borne SAR imaging system architecture design based on a single-chip FPGA. The single-chip FPGA comprises a processing module PS and a programmable logic module PL; the PS module is provided with a double-core ARM and a DDR storage device; the PL module is internally provided with an FPGA module, a RAM module and a DMA module; the FPGA module is used for obtaining an intermediate frequency digital echo signal, performing digital down-conversion and range direction pulse compression and storing the result in the RAM module. The core 0 of the ARM successively performs Doppler center estimation, distance moving correction, distance bending correction and Doppler frequency modulation estimation on the distance pulse compression image. The FPGA module performs motion error compensation, azimuth nonlinear scaling and azimuth pulse compression on the image after distance direction correction. The core 1 of the ARM performs multi-view processing and quantification processing on the azimuth pulse compression image to obtain an SAR image data.

A method for video teleconferencing comprises receiving a starting image with a number of rows and a number of columns. The starting image is downscaled with a dual-axis warping function to create a scaled image with a number of rows fewer than the number of rows of the starting image and a number of columns fewer than the number of columns in the starting image. Then, a transmission image is created from the scaled image.