67results about How to "Improve interpolation" patented technology

The invention relates to an edge-detection-based image enlarging and reducing method. Traditional method would produce ambiguity and saw teeth on the edge of enlarged and reduced image. This invention comprises: (a) making use of the size of image fore-and-aft enlarging and reducing to obtain position in coordinate of point to be insert in original image, (b) making use of space coherence among picture elements of image to judge existence of edge with recursion and confirm direction of edge, (c) making use of edge of property judged in step (b) to employ cubic convolution interpolation in non-edge area and employ bilinear interpolation in the edge direction in fringe area.

The invention discloses a scale transformation method based on an image edge direction, comprising the following steps: (a) acquiring the coordinate positions of points to be interpolated in an original image according to the transformation ratio of the image; (b) judging the direction of each image edge by utilizing the spatial correlation of the vertical direction and the horizontal direction of the image; (c) analyzing interpolation methods suitable for each point to be interpolated according to the judging result of the step (b), i.e. adopting a cubic convolution interpolation method for large-angle edge direction, and adopting a linear interpolation method for small-angle edge direction; and (d) carrying out interpolation operation based on the image edge direction for each pixel point according to the judging results of the step (b) and the step (c). In the invention, by utilizing the spatial correlation of the adjacent pixels of the points to be interpolated, the edge direction information of the image is extracted in a multi-direction and multi-level way, and the judgment is accurate and correct.

The invention discloses an image interpolation method and a device. The method comprises steps: on the basis of color component values of a pixel point, regional division is carried out on the image, wherein the image is stored in a CFA data format; on the basis of gradient values of the pixel point, interpolation directions of a green component of the pixel point in a blue channel and a red channel are determined; on the basis of the interpolation direction of the green component, weights of the green component of the pixel point in the blue channel and the red channel are determined; on the basis of the regional division, the interpolation direction of the green component of the pixel point and the weight of the green component of the pixel point, interpolation of the green component of each pixel point in the blue channel and the red channel is acquired; and on the basis of the interpolation of the green component, the red component interpolation and the blue component interpolation of the pixel point of each channel are acquired. The difference between the interpolation result and the original real image can be effectively reduced, the image has good interpolation effects, false color generated in the case of interpolation of the CFA image can be effectively reduced, and the interpolation method is simple and easy to realize.

A low-cost magnetic encoder that facilitates generating sinusoidal magnetic flux is provided. First and second permanent magnet arrays each include a plurality of permanent magnets arranged such that magnetic poles having the same polarity face each other, and magnetic yokes disposed on side surfaces of the plurality of permanent magnets. The permanent magnets and the magnetic yokes are arranged side by side at a predetermined pitch in the moving direction of a magnetic piece array. First and second magnetic detectors corresponding to the first and second permanent magnet arrays are disposed in a positional relationship allowing detection of leakage magnetic flux generated when the permanent magnet arrays and the magnetic piece array are displaced with respect to each other.

An interpolation filter for interpolating a digital signal includes a cascade of template filters, each having an identical template transfer function A(z), which is arranged to receive and filter an input sequence representing the digital signal sampled at an input sampling rate. Ancillary circuitry is coupled to the cascade so as to produce first and second phase outputs. A multiplexer is arranged to multiplex the phase outputs in order to generate an output sequence having an output sampling rate equal to twice the input sampling rate.

The invention discloses a Bayer format image interpolation method based on gradients and a display device based on an FPGA. Aiming at color recovery of red and blue pixels, improvement is carried out on bilinear interpolation; averaged interpolation processing is no longer simply carried out to pixels; horizontal and vertical gradients and left and right diagonal gradients of the pixels are calculated according to Sobel operators; horizontal and vertical weighting coefficients and left and right diagonal weighting coefficients are determined according to the ratio relation of the horizontal and vertical gradients and the ratio relation of the left and right diagonal gradients; therefore, the interpolation results of the red and blue pixels are obtained. The display device in the invention takes the FPGA as a core platform; the parallel processing and modular design advantages of the FPGA are utilized fully; the realization time of module functions such as graphic image generation, collection of video image data, color interpolation processing and graph overlapping and displaying is reduced; and the display demands of the airborne display device for high resolution and high rate graphic images are satisfied.

A de-interlacing method and apparatus, and a video decoder and a reproducing apparatus using the de-interlacing method or apparatus are provided. The de-interlacing method includes the steps of: (a) determining an interpolation direction based on a plurality of left and right pixels in left and right pixel columns located at left and right sides of the to-be-interpolated pixel, respectively; and (b) obtaining an interpolated pixel value by performing an interpolation process in a determined interpolation direction. According to the de-interlacing method, it is possible to improve interpolation performance by easily and effectively detecting an edge located in a near-horizontal direction without increasing calculation amount.

The invention discloses a Bayer image processing method and system, electronic equipment and a storage medium. The processing method comprises the following steps: acquiring a plurality of neighborhood pixel points of each target pixel point in a Bayer image; performing interpolation on the channels of the target pixel points corresponding to the other two color parts to obtain a first interpolation result set and a second interpolation result set; obtaining the edge direction of the target pixel point; obtaining a first weight of each first interpolation result in the first interpolation result set and a second weight of each second interpolation result in the second interpolation result set; and filtering the interpolation result according to the first weight and the second weight by adopting a weighted median filtering algorithm to obtain full-color pixel data of the target pixel point, and further generating a full-color image corresponding to the Bayer image. According to the method, different textures of the Bayer image can be effectively recovered, and pseudo-color and zipper effects generated by an existing interpolation technology are effectively reduced.

The invention relates to a digital zoom device and method. The digital zoom device comprises a DSP (Digital Signal Processor) module and an FPGA (Field Programmable Gate Array) module, wherein the DSP module is used for acquiring an original image and outputting image information of the original image, and the FPGA module is connected with the DSP module and is used for receiving the image information output by the DSP module, carrying out buffering and shooting processing on the original image according to configuration parameters, and outputting a processed image; and the DSP module is used for receiving the processed image output by the FPGA module, carrying out interpolation and amplification processing on the processed image, and outputting an amplified image. The digital zoom method comprises the following steps that: (S1) the DSP module outputs the image information of the acquired original image; (S2) the FPGA module carries out buffering and shooting processing on the original image according to the configuration parameters, and outputs the processed image; and (3) the DSP module carries out interpolation and amplification processing on the processed image, and outputs the amplified image. The device and the method have the advantages that both the high operating speed of an FPGA and the strong operational capability of a DSP are sufficiently utilized, so that image data can be processed in time; and the interpolation effect is good, the response is fast, and the work efficiency is high.

The invention discloses an image processing method based on Bayer arrangement, and the method comprises the following steps of S01, obtaining a Bayer image from a photosensitive element covered with acolor filter array, and carrying out the G-channel interpolation in an R pixel unit and a B pixel unit of the Bayer image; S02, calculating an edge judgment operator of the G pixel unit; calculatinga direction judgment operator corresponding to the G pixel unit according to the relative size of the edge judgment operator; carrying out B-channel interpolation and R-channel interpolation in the Gpixel unit by combining the edge judgment operator and the direction judgment operator; and S03, performing R-channel interpolation and B-channel interpolation in the B pixel unit and the R pixel unitrespectively. According to the image processing method provided by the invention, the G pixel unit is used for providing the direction judgment information for interpolation of the R pixel unit and the B pixel unit, the problem of direction judgment difficulty caused by the sparse sampling of the R pixel unit and the B pixel unit is solved, and the purpose of reducing the visual artifacts is achieved.