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192results about How to "Eliminate blocking" patented technology

Gray scale image fitting enhancement method based on local histogram equalization

InactiveCN105654438ASuppresses "cold reflection" imagesEvenly distributedImage enhancementImage analysisImage contrastBlock effect
The invention provides a gray scale image fitting enhancement method based on local histogram equalization. The gray scale image fitting enhancement method has advantages of improving gray scale image contrast and detail information and eliminating block effect and over-enhancement. The gray scale image fitting enhancement method comprises the steps of performing segmental linear transformation on a gray scale image in an overwide dynamic range, obtaining the gray scale image in an appropriate dynamic range, dividing an image gray scale distribution interval to two segments to multiple segments, adjusting the gradient of a segmenting point and a transformation line of each image gray scale distribution interval, performing expansion or compression on a random gray scale interval; performing subblock part overlapping histogram equalization on a transformation result, obtaining the transformation function of the current subblock through performing weighted summation on a subblock transform function in the neighborhood, performing histogram equalization processing on the current subblock by means of the transformation function; and performing nonlinear fitting on the gray scale map after histogram equalization, and performing histogram distribution correction on the gray scale image after subblock part overlapping histogram equalization.
Owner:SOUTH WEST INST OF TECHN PHYSICS

Fast lapped image transforms using lifting steps

InactiveUS20080075377A1Fast and efficient and robustFast and low-cost approachCharacter and pattern recognitionDigital video signal modificationMulti bandOne pass
This invention introduces a class of multi-band linear phase lapped biorthogonal transforms with fast, VLSI-friendly implementations via lifting steps called the LiftLT. The transform is based on a lattice structure which robustly enforces both linear phase and perfect reconstruction properties. The lattice coefficients are parameterized as a series of lifting steps, providing fast, efficient in-place computation of the transform coefficients as well as the ability to map integers to integers. Our main motivation of the new transform is its application in image and video coding. Comparing to the popular 8.times.8 DCT, the 8.times.16 LiftLT only requires 1 more multiplication, 22 more additions, and 6 more shifting operations. However, image coding examples show that the LiftLT is far superior to the DCT in both objective and subjective coding performance. Thanks to properly designed overlapping basis functions, the LiftLT can completely eliminate annoying blocking artifacts. In fact, the novel LiftLT's coding performance consistently surpasses that of the much more complex 9/7-tap biorthogonal wavelet with floating-point coefficients. More importantly, our transform's block-based nature facilitates one-pass sequential block coding, region-of-interest coding/decoding as well as parallel processing.
Owner:RPX CORP

Unmanned aerial vehicle scouting image synthesis compressed encoding method based on selective block transformation

The invention discloses an unmanned aerial vehicle scouting image synthesis compressed encoding method based on selective block transformation. The method comprises the steps of synthesizing the H.264 compressing scheme and the JPEG 2000 compressing scheme, carrying out selective algorithm adjustment and improvement on block transformation in the H.264 video coding standard, and obtaining a compressed code stream by means of compressed encoding. According to the unmanned aerial vehicle scouting image synthesis compressed encoding method based on the selective block transformation, the problem of limitation on image transmission bandwidth caused by limitation of size, weight and power consumption and other respects of an unmanned aerial vehicle platform, and influence of channels, external environment and enemy interference and other factors on actual image information transmission is effectively solved, uncompressed image source information is differentiable under the situation that still images before and after compression are similar in respect of PSNR and subjective quality evaluation of a scouting video is high, the compression ratio is greatly increased, and the scheme is systematic.
Owner:北京北航天宇长鹰无人机科技有限公司

Engine anhydrous cooling liquid and preparation method thereof

The invention discloses an engine anhydrous cooling liquid and a preparation method thereof, wherein the engine anhydrous cooling liquid comprises the following raw materials by the weight percentage:60-70% of propylene glycol, 25-30% of ethylene glycol, 3-4% of 1,2-aminoazophenylene, 1-2% of sodium nitrate, 2-3% of glycerol, 1-2% of triethanolamine, 0.5-1.5% of sodium hydroxide, and 0.1-1% of apigment. The anhydrous cooling liquid has the freezing point lower than -52 DEG C and the boiling point more than 190 DEG C and has a large thermal safe space, so with the use of the product, the anhydrous cooling liquid can maintain a good state for operation, adequate power is maintained, noise is reduced, a water tank does not produce 'boiling', and cylinder score is not generated. With use ofthe anhydrous cooling liquid, zero corrosion can be achieved, no water rust is generated, cleaning and repair are not needed forever, and boiling, cylinder score, water tank blocking, water rust, water scale, corrosion and cavitation corrosion, engine fatigue, nausea, explosive vibration, precombustion, large noise, unstable idle speed, cylinder pressure reduction, insufficient power, oil consumption increase and large exhaust gas emission smoke and other phenomena are thoroughly eliminated.
Owner:四川路恒达机械科技有限公司

Soundproof-cotton gluing machine application method

The invention discloses a soundproof-cotton gluing machine application method and belongs to the technical field of gluing machines. The soundproof-cotton gluing machine application method includes the steps of 1), equipment starting, namely respectively starting a gluing mechanism, a glue discharging mechanism, a recycling mechanism and a belt conveying mechanism on a soundproof-cotton gluing machine; 2), gluing, namely allowing glue flowing out from a glue discharging device to flow down along a gap between a gluing roller and a glue mixing roller and a to-be-glued rubber skin to be driven by the gluing roller to move sequentially in gaps of between a glue applying roller and the glue roller as well as between the glue applying roller and the glue mixing roller for gluing; 3), gluing completion, namely allowing the rubber skin coated with the glue to be conveyed to the tail portion of a conveying platform through a conveying belt, wherein the lower surface of the rubber skin is in friction contact with the upper surface of a cushion block, movement speed of the rubber skin is reduced, the rubber skin is taken away by workers, and gluing is completed. With the method, problems that gluing is uneven, waste glue cannot be effectively recycled and the like are solved.
Owner:河北蓝格隔音材料有限公司

Compressed sensing imaging method, apparatus, device and system and storage medium

The embodiment of the invention discloses a compressed sensing imaging method, apparatus, device and system and a storage medium. The method employs an image compression coding device configured to perform compression, coding and sampling of a target image, a sampling controller and an image reconstruction calculator. The image compression coding device comprises a one-dimensional coding aperturetemplate and a linear array image detector, and the one-dimensional coding aperture template corresponds to the linear array image detector; the sampling controller controls drive of the one-dimensional coding aperture template and the linear array image detector to perform coding sampling and sends the obtained sampling data to the image reconstruction calculator; and the image reconstruction calculator is configured to perform single iteration of the reconstructed integrated sparse coefficient matrix through adoption of each dimensions of data based on the sampling data to obtain a recoveredtarget image. The compressed sensing imaging method, apparatus, device and system and the storage medium simplify the coding process, reduce the cost, eliminate the blocking effect of the block compression sensing system, obviously improve the image quality and achieve higher imaging quality with a lower hardware cost.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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