30results about How to "Minimize blurring" patented technology

A method of reducing spatial noise in an image. Low-pass (smoothing) filters are calculated simultaneously from three successive image rows. Three blocks (m1, m2, m3) are associated with the three successive image rows, and the blocks are processed in row-major order. This implementation is applicable to both luminance and chrominance. The number of smoothing parameters is reduced to one. The technique is applicable to both luminance and chrominance. Directional mapping is used. Extension of the technique to spatial filtering using a 5×5 neighborhood (using five successive image rows) is described. Embodiments of the method using the MMX instruction set are described.

The present invention provides a charged particle beam column that does not cause displacement of an image or degradation of a resolution of images when a charged particle beam is tilted at a large angle. In the charged particle beam column including an aberration corrector, a deflector is used to control the direction of incidence of the charged particle beam on a second condenser lens but the object point of a condenser lens is not shifted. Consequently, the converging charged particle beam is tilted at a large angle with respect to the surface of a specimen without the necessity of shifting the object point of an objective lens lying on the optical axis of the charged particle beam column. At this time, the aberration corrector prevents a shift of an image or degradation of a resolution derived from the tilt of the charged particle beam.

Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. Low pass filtering is applied only along object boundaries and unstructured areas within the image so as to minimize the tendency to blur image edges. Using only four high pass filters to locate horizontal, vertical and diagonal image edges passing through the center of a 3×3 pixel array provides good results.

A display device includes a data modulator for analyzing a gray level of input data, modulating the input data in accordance with the analyzation result, and inserting one of black data and white data along with the modulated data, and a driver for supplying modulation data from the data modulator and the one of black data and white data to a display panel.

Three-dimensionally reconstructed images are not ideal due to blur or smear that is caused by various sources in an X-ray CT scanner. In order to substantially minimize the blur in the three-dimensionally reconstructed image, a known PSF is weighed according to a combination of predetermined parameters. The parameters include two types of information. One group of the parameters is related to device characteristics of the scanner device while the other is related to the scanning conditions of a particular scan. The improvement is performed in any combination of the X, Y and Z directions. The improved PSF's are used to de-convolute the three-dimensionally reconstructed CT image. As a result, the blur and smear are substantially removed from the three-dimensionally reconstructed image data for good visualization as well as accurate physical measurements in the scanned image. The improved techniques according to the current invention are applicable to two-dimensional image data.

An illumination technique is provided that adjusts the respective light intensities of each of a plurality of light sources that are strobed at desirable consistent intensities by adjusting a respective light pulse pattern for each respective light source. All the light sources are controlled to illuminate an object throughout a strobe duration period. The light pulse patterns may be micro-strobed light pulse patterns, formed by a variety of methods. The illumination technique is usable to preserve the general shape of the edge intensity profile on an object, and allow precision edge position measurements, regardless of whether the object is moving or not during image acquisition.

A display device includes a data modulator for analyzing a gray level of input data, modulating the input data in accordance with the analyzation result, and inserting one of black data and white data along with the modulated data, and a driver for supplying modulation data from the data modulator and the one of black data and white data to a display panel.

Systems and methods are provided for allowing a user to correct a discontinuous 2-3 field sequence within a disrupted video signal. A 2-3 field pattern fixer can be operated in a one-pass mode and / or a two-pass mode. In the one-pass mode, the disrupted video signal is analyzed to generate correction information, which is used to correct the disrupted video signal as it passes through the 2-3 pattern fixer, resulting in an undisrupted video signal with a continuous 2-3 field sequence. In the two-pass mode, the disrupted video signal is analyzed to generate correction information, which is then stored. This correction information is then used to correct a duplicate of the disrupted video signal, resulting in an undisrupted video signal with a continuous 2-3 field sequence. In this connection, the 2-3 field pattern fixer includes a field sequence detector, a field sequence analyzer, a field sequence generator and a multiple delay tap circuit. The field sequence detector generates field difference values in response to receiving the disrupted video signal. The field sequence analyzer analyzes these field difference values to determine one or more discontinuities within the discontinuous 2-3 field sequence. The field sequence generator generates one or more field sequence correction signals in response to this analysis. The multiple delay tap circuit applies these correction signals to a video signal to generate an undisrupted video signal having a continuous 2-3 field sequence. The 2-3 field pattern fixer can optionally includes a First-In-First-Out (FIFO) memory and a time code comparator, which can be used to store a multitude of the correction signals during the first pass of the two-pass mode, and for synchronizing the application of each of the correction signals to the duplicated disrupted video signal during the second pass of the two-pass mode.