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226 results about "Ultra high resolution" patented technology

Ultra high definition (UHD or 4K/8K) is a display resolution standard of at least 3840 by 2160 pixels (8.3 megapixels; 4K), which is double that of Full HD's 1920 by 1080 (2 megapixels).

Real-time processing platform for ultra high resolution remote sensing images based on functions of FPGA and DSP

The invention discloses a real-time processing platform for ultra high resolution remote sensing images based on functions of an FPGA and a DSP. The real-time processing platform mainly comprises an image acquisition module, an image preprocessing module and a remote sensing image core processing module, wherein the image acquisition module consists of a fiber coupling sensor and a Cmos image sensor; the image preprocessing module consists of a field programmable gate array (FPGA) chip, an SRAM memory and a Flash memory, and the SRAM memory and the Flash memory are connected on the FPGA chip; and the remote sensing image core processing module consists of a digital signal microprocessor (DSP) chip, a high-speed SDRAM memory and a Flash memory, and the high-speed SDRAM memory and the Flash memory are connected on the DSP chip. The invention supports high resolution images; because of high integrated level control, the effectiveness and instantaneity of the system are greatly improved; the hardware adopted by the invention has simple and flexible framework and stronger generality, and is suitable for modular design, thereby being capable of improving the efficiency of the algorithm; and simultaneously, the invention has short development period and the system which is easy to be maintained and expanded, and is specially suitable for high-speed real-time image signal processing.
Owner:SHANGHAI MARITIME UNIVERSITY

Autofocus motion compensation method of airborne ultra-high resolution SAR (Synthetic Aperture Radar) back projection image

ActiveCN104316924ARemove space-variant featuresMotion compensation worksRadio wave reradiation/reflectionSynthetic aperture sonarDecomposition
The invention discloses an autofocus motion compensation method of an airborne ultra-high resolution SAR (Synthetic Aperture Radar) back projection image. The phase error introduced by the deviation of a flight path cannot be fully compensated through a radar platform motion sensor under the condition of high resolution and accordingly the image focusing quality is affected. The target defocusing can exist along different inclined directions in the image reconstruction by a back projection algorithm, the target distance migration cannot be strictly limited within a distance resolution cell, and the traditional autofocus processing fails. The correction is performed on the sub-bandwidth autofocus motion compensation processing of an imaging grid; the data collection is performed on the inclined plane after the correction for image reconstruction and the space-variant characteristics of the target defocus direction is completely removed; the sub-bandwidth decomposition is performed on back projection processing data and the phase gradient autofocus and splicing is performed to obtain a refocused image. Compared with the existing algorithm, the high-order motion phase error is considered and the effective compensation of the phase error in the image reconstruction by the back projection algorithm is implemented.
Owner:NANJING UNIV OF POSTS & TELECOMM

Ceramic plate detection equipment and detection method

The invention relates ceramic plate detection equipment and detection method thereof, which can rapidly and accurately detect the technical parameters of a ceramic plate to be detected and can mark the ceramic plate according to the detection result. The ceramic plate detection equipment comprises a conveying mechanism and a support, wherein the conveying mechanism is positioned in the support; four sides of the support, which are arranged above the conveying mechanism are respectively provided with a linear laser transmitter with adjustable angle, the linear laser lines obliquely transmitted by the linear laser transmitters from top to down form a rectangular linear laser frame on the conveying surface of the conveying mechanism; the four angles of the upper part of the support and the conveying mechanism are respectively provided with an ultra high-resolution industrial camera the signal output end of which is connected with the signal input end of a computer. The invention has the following advantages: 1, the diction process is simple and fast, the detection is accurate and the detection efficiency is high; and 2, the structure is simple, the equipment has the function of automatically identifying marks so as to effectively prevent artificial sorting errors.
Owner:HANGZHOU SANSU TECH
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