30results about How to "Avoid ringing" patented technology

The invention provides an infrared image and visible image fusion method based on guide filtering. The method comprises the steps of: firstly, expanding the guide filtering to multiple scales, and performing multi-scale decomposition on an infrared image and a visible image by using the multi-scale guide filtering, so as to obtain a low-frequency subband and a high-frequency subband; performing nonsubsampled directional filtering on the high-frequency subband, so as to obtain a directional subband coefficient; applying different fusion rules to the directional subband coefficient and a low-frequency subband coefficient, so as to obtain the corresponding directional subband coefficient and the low-frequency subband coefficient after fusion, and finally, performing directional filtering reconstruction and multi-scale reverse transformation based on the guide filtering, so as to obtain a final fusion image. According to a fusion result obtained by adopting the method, the edge and thermal radiation characteristics of an infrared image object are preferably kept, scene details of the visible image can be preferably reserved, and the information content of a fusion image is increased, so that the edge and details of the fusion image are enriched.

The invention discloses a real-time color image filtering method based on nonlocal domain transformation. The method comprises the following steps: using a two-dimensional color image as a two-dimensional manifold on a five-dimensional vector space, and defining distance-weighted keeping transformation to obtain a multi-channel weighted isometric function; using recursive filtering to realize one-dimensional nonlocal domain transformation filtering of linear time; conducting separated one-dimensional nonlocal domain transformation filtering to the two-dimensional color image. The nonlocal domain transformation method can effectively involve nonlocal information into an image filtering algorithm. Under the premise that a small amount of computation is added, a high-quality filtering image is effectively obtained, and meanwhile the two aspects of requirements that the edge information in the image is not fuzzy are taken into account. A single color (or gray) image is adopted as an input source, the algorithm complexity is lower, the filtering effect is good, and a variety of computer vision application requirements can be met. The method is especially suitable for image detail enhancement, picture stylizing, image colorizing and pencil drawing conversion.

An interference signal processing device comprises a component generator, an interference estimator, a first difference device and a first summator, wherein the component generator is used for outputting an alternating current component X' and a direct current component B of a sampling signal X; the interference estimator is used for estimating an interface signal N0 at present according to a gain adjustment function; the first difference device is used for generating an original signal alternating current component Y' according to the difference between the alternating current component X' and the interface signal N0; and the first summator is used for generating an original signal Y according to the sum of the original signal alternating current component Y' and the direct current component B. The invention further provides an interference signal processing method and a medical detection device provided with the interference signal processing device.

The invention discloses a blurred image non-blind restoration method based on edge image block sharpening. The method comprises the following steps: establishing an edge image block database; extracting an edge segmentation image G1 and a smooth region segmentation image G2 of the blurred image G; carrying out grid division on the edge segmentation image G1, and carrying out matching sharpening processing on an edge region position image block with a pixel value in a divided grid region to obtain an edge region image G1'after sharpening updating; restoring the smooth region segmentation imageG2 to obtain a restored smooth region image G2 '; and obtaining a restored image G' of the blurred image G. The method has the advantages that the method is simple; according to the method, grid division is carried out on an edge area image, for each divided unit grid, a clear image block with the maximum gray similarity matching coefficient is searched and determined in an image block database, image block sharpening updating of an edge area is completed, edge definition is improved, and meanwhile the ringing effect caused by restoration algorithm iteration is avoided.

The invention relates to an image or video compression coding and provides an image or video coding method based on predistortion and filter training, and the method not only can improve the coding efficiency but also avoids a ringing effect so as to guarantee the image quality. The image or video coding method based on predistortion and filter training comprises the following steps: through a low-pass filter, performing predistortion fuzzification treatment on a sequence of each frame of video before coding; at a decoding end, adopting a large amount of images with various image structures to form a training sample library at first; then, performing offline training on a filter set by the classified images; when reconstructing fuzzy images at the decoding end, classifying the image structures by adopting a combined method of ADRC (adaptive dynamic range coding) and the other classification method, finding corresponding optimal filter coefficients in a lookup table according to a classification result, forming optimal filters, performing defuzzification respectively based on image structure types, and finally performing synthesis to obtain defuzzified images. The image or video coding method is mainly applied to image or video compression coding.

The invention relates to an image fusion method, in particular to an infrared and visible light image fusion method, and particularly relates to an infrared and visible light image synchronous fusion noise reduction method based on side window filtering and multi-scale transformation. Respectively obtaining corresponding base layer and detail layer information; extracting a base layer salient region of the infrared image by using a self-adaption-based power transformation method; fusing the extracted infrared image base layer region and the visible light image base layer by using a fusion rule to obtain a base layer fusion image; performing synchronous fusion noise reduction processing on the detail layer image by adopting a method based on total variation to obtain a base layer fusion image; and reconstructing the obtained base layer fusion image and the detail layer fusion image to obtain a final fusion image, the contrast of the fusion image is obvious, the salient region is prominent, and the noise is greatly reduced.

The invention belongs to the related technical field of ground penetrating radars, and discloses a hybrid-loaded dual-polarized ground penetrating radar array antenna, which comprises a vertical polarized antenna group, a horizontal polarized antenna group and a radio frequency switch, the vertical polarization antenna group comprises a vertical polarization transmitting antenna and a vertical polarization receiving antenna of which the backs are provided with shielding cavities; the horizontally polarized antenna group comprises a horizontally polarized transmitting antenna and a horizontallypolarized receiving antenna of which the backs are provided with shielding cavities; and the vertical polarization transmitting antenna and the horizontal polarization transmitting antenna are connected through the radio frequency switch. And the vertical polarization receiving antenna is connected with the horizontal polarization receiving antenna through a radio frequency switch. The the detection capability of a conventional single-polarization ground penetrating radar can be effectively improved, more underground heteroplasmon information can be obtained, two radar images can be obtainedthrough one-time detection, and the detection efficiency is greatly improved.

The invention relates to a single photon detector and a high-voltage quick adjusting circuit thereof. The high-voltage rapid adjustment circuit comprises: a high voltage circuit, a reference voltage circuit, an operational amplifier wherein the output end of the high-voltage circuit is used for outputting a set voltage; the output end of the reference voltage circuit is used for generating a reference voltage; and the in-phase input end of the operational amplifier is connected with the output end of the reference voltage circuit, the output end of the operational amplifier is connected with the control end of a switching tube, the input end of the switching tube is connected with the output end of the high-voltage circuit, the output end of the switching tube is used for being connected with the cathode of the single photon detection diode, and a capacitor is connected between the output end of the operational amplifier and the cathode of the single photon detection diode in parallel.The single photon detector and the high-voltage quick adjusting circuit thereof can prevent the breakdown of the photodiode, avoid the problems of ringing and oscillation and improve the stability ofthe circuit.

The invention proposes a weak-parameter-dependence fingerprint image frequency domain filtering enhancement method and system, and the method comprises the steps: converting a fingerprint image to a frequency domain through space-frequency domain conversion under a level frame and a composite window strategy; building a frequency spectrum matching filter in the frequency domain; carrying out the fingerprint image enhancement of frequency spectrum filtering and frequency spectrum diffusion based on the frequency spectrum matching filter, thereby avoiding a defect that a conventional fingerprintenhancement method depends on parameters, remarkably improving the enhancement quality of the fingerprint image, and especially improving the enhancement quality of a low-quality fingerprint image.

The invention discloses a bicycle bell with a brake handle. The bicycle bell comprises a bell body, a brake handle and a pull wire, the bell body and the brake handle are installed on a handlebar, thebell body comprises a bell bowl and a poking rod, the bicycle bell also comprises a bell poking structure, the bell poking structure is installed on the handlebar, the brake handle is connected withthe bell poking structure through the pull wire, the bell poking structure is connected with the poking rod of the bell body, and the pull wire drives the bell poking structure to work and poke the poking rod to ring. According to the invention, the vehicle front brake handle with low use efficiency is utilized; the bell is controlled by the pull wire of the brake handle; and the bicycle bell is controlled to make a sound through holding and releasing of the brake handle, so the bicycle bell is more convenient and safer to control, the palm does not need to leave the brake handle at all duringbell poking, the situation that one hand of a rider partially or completely leaves the handlebar for bell poking is avoided, and potential safety hazards caused by the fact that the rider loses balance when holding the handlebar with one hand in the riding process are eliminated.

The invention discloses an image local contrast enhancement method for improving the perceptibility of image information, which enables all information in an image to be clearly perceived by human eyes as much as possible on the premise of retaining image local information. Retaining image local information is realized by ensuring that the gray scale relation between each pixel and pixels around the pixel within a certain range can be perceived by human eyes. Under the fidelity constraint, the human eye perceptibility of the gray scale relation between all adjacent pixels of which the gray scale difference is not 0 in the image is synchronously widened from 0; when the human eye perceptibility of the gray scale relation between part of adjacent pixels cannot be further widened, the perceptibility of the gray scale relation between the remaining adjacent pixels is continuously widened, till the human eye perceptibility of the gray scale relation between all the adjacent pixels is widened to a set perceptibility threshold or cannot be further widened. The method can be used for enhancing low contrast images caused by various reasons.

The invention discloses a pulling-wire-type bicycle bell. The pulling-wire-type bicycle bell comprises a bicycle bell body, a brake handle and a pulling wire, wherein the bicycle barbell body and thebrake handle are installed on a handlebar, the bicycle barbell body comprises a bell dome, a shifting rod and a bell pulling structure, the bell dome is installed on the handlebar, and the shifting rod is installed on the bell dome; the bell pulling structure is installed on the handlebar, one end of the pulling wire penetrates through the bell pulling structure to be connected with the shifting rod, and the other end of the pulling wire is connected with the brake handle. By pinching and loosening the brake handle, the pulling wire drives the shifting rod to work, so that the bell dome givesout bell sound. The pulling-wire-type bicycle bell is simple in structure, the front bicycle brake handle which is low in using efficiency is utilized, the bicycle bell is controlled through the pulling wire of the brake handle, by pinching and loosening the brake handle, the bicycle bell body is controlled to give out sound, and the control over the bicycle bell body is more convenient and safer;when the bell is shifted, the palm does not need to be away from the brake handle at all, the situation that the part or whole of one hand of a rider is away from the handlebar to shift the bell is avoided, and hidden safety hazards that in the riding process, since the rider grips the handlebar with one hand, the balance is lost, and then accidents occur are eliminated.

The invention discloses a method for filtering electrocardiographic signals for removing ringing, which comprises the following steps: step S1, collecting original electrocardiographic signals, and identifying abrupt segments in the original electrocardiographic signals; step S2, intercepting the abrupt segments to obtain For the sudden change signal, the sudden change segment in the original ECG signal is replaced by a replacement segment to obtain a replacement signal; step S3, performing power frequency filtering on the sudden change signal and the replacement signal respectively, to obtain a sudden change filter signal and a replacement filter signal; step S4 . Splicing the mutation filter signal and the replacement filter signal to obtain a complete ECG filter signal. The invention can effectively remove the ringing phenomenon in the electrocardiographic filtering process.

The invention discloses a digital design method for a feed induction feedback loop of an electronic instrument. The method comprises the following steps: designing a digital feedback loop which consists of a high-speed analog-to-digital converter, a high-speed digital-to-analog converter and a digital arithmetic unit and meets the maximum system response time constraint, and designing a feedback algorithm which operates on the digital arithmetic unit. A traditional analog linear generation or non-linear feedback circuit is replaced, so that the loss of the feed cable is adjusted and compensated in real time by the voltage of the feed end according to the reverse direction of the signal amplitude of the induction end, the amplitude of the signal applied to the target end by the instrument reaches a set value, and meanwhile, the risk of a Gibbs ringing phenomenon is avoided.

The invention discloses a brake handle hammer type bicycle bell. The brake handle hammer type bicycle bell comprises a bicycle bell, a brake handle, and a pull wire. The bicycle bell and the brake handle are disposed on a handlebar. The bicycle bell comprises a bell dome and a bell knocking structure. The bell dome is disposed on the handlebar, and the bell knocking structure is disposed on one side of the bell dome, and the brake handle is connected with the bell knocking structure by the pull wire. By pulling and releasing the brake handle to drive the pull wire to control the bell knockingstructure to knock on the bell dome to ring. By using the front brake handle having the low utilization efficiency, the pull wire is used to control the bicycle bell, and the bicycle bell can be ringed by pulling and releasing the brake handle. The control of the brake handle is more convenient, and during the ringing, a palm of a user is not required to leave the brake handle, and a part or the full palm of the user is prevented from leaving the bell, and then the safety hidden trouble of losing balance caused by the single hand holding the handlebar during cycling can be prevented.

The invention provides a smart guardrail for urban traffic, which relates to the technical field of guardrails and includes guardrail columns and an anti-span structure. , the surface of the connecting plate is fixedly connected with a round rod, the surface of the guardrail column is fixedly connected with a rectangular frame, the surface of the rectangular frame is provided with an anti-crossing structure, and the anti-crossing structure includes an ink storage box, the ink The surface of the storage box is fixedly connected with the rectangular frame, the surface of the guardrail column is slidably connected with a sliding frame, the end of the sliding frame close to the rectangular frame is fixedly connected with a touch rod, and the inner wall of the ink storage box is vertically slidably connected with a touch rod. A plastic shell, the top of the plastic shell is fixedly connected with a sponge block. The present invention will greatly reduce the probability of pedestrians crossing the guardrail, thereby improving the standardization of road traffic and reducing the traffic accident rate.

The invention discloses an electrocardiogram signal filtering method for removing ringing artifact. The electrocardiogram signal filtering method comprises the following steps: step S1, acquiring an original electrocardiogram signal and identifying a sudden change section in the original electrocardiogram signal; step S2, intercepting the sudden change section to obtain a sudden change signal; replacing the sudden change section in the original electrocardiogram signal with a replacement section, so as to obtain a replacement signal; step S3, carrying out power frequency filtering on the sudden change signal and the replacement signal respectively, so as to obtain a sudden change filtering signal and a replacement filtering signal; step S4, splicing the sudden change filtering signal and the replacement filtering signal to obtain a complete electrocardiogram filtering signal. The electrocardiogram signal filtering method disclosed by the invention can be used for removing ringing artifacts in an electrocardiogram filtering process.

The invention provides an intelligent guardrail for urban traffic, and relates to the technical field of guardrails. The intelligent guardrail comprises two guardrail stand columns and an anti-span structure, the ends, close to each other, of the two guardrail stand columns are fixedly connected with a connecting plate, the surface of the connecting plate is fixedly connected with a round rod, a rectangular frame is fixedly connected with the surface of each guardrail stand column, an anti-striding structure is arranged on the surface of each rectangular frame and comprises an ink storage box, the surface of each ink storage box is fixedly connected with the corresponding rectangular frame, a sliding frame is slidably connected to the surface of each guardrail stand column, a touch rod is fixedly connected with the end, close to the corresponding rectangular frame, of each sliding frame, a plastic shell is vertically and slidably connected to the inner wall of each ink storage box, and a sponge block is fixedly connected to the top end of each plastic shell. According to the invention, the probability that pedestrians climb over the guardrail is greatly reduced, so that the normalization of road traffic is improved, and the traffic accident rate is reduced.