55 results about "Edge operator" patented technology

The invention discloses a drone thermal infrared image-based coal fire identification method. The method mainly comprises the following steps that: a thermal infrared camera is mounted on a rotor drone pan-tilt holder, and a drone completes the acquisition work of the thermal infrared images of a mine area according to a designed flight route; the acquired thermal infrared images are preprocessed;the thermal infrared camera is calibrated through a laboratory black body radiator, the DN values of the images are converted into apparent radiance values; all the thermal infrared images are subjected to aerial triangulation adjustment orienteering, and a thermal infrared orthoimage is obtained through mosaic, and the surface temperature of the mining area is obtained through inversion on the basis of an atmospheric transport equation and the Planck function; and a high gradient graph is generated according to the Sobel edge operator, the high gradient graph is refined into skeleton lines,a high temperature area and the high gradient lines are superimposed, the temperature average value of the overlapping position of the high temperature area and the high gradient lines is adopted as the fire area segmentation threshold value of the mining area, and the threshold value is adopted to identify the coal fire area of the mining area. The coal fire identification accuracy of the methodcan be as high as 96.7%. With the method of the invention adopted, the rapid and accurate identification and drawing of coal fires under the conditions of complex mining areas can be realized at relatively low cost.

The invention relates to an in-situ observation method for gas arc electrode sputtering ablation, which comprises the following steps of: irradiating the surface of an electrode by adopting high-powerlaser, and filtering arc light by utilizing a narrow-band filter to obtain an image for representing an electrode sputtering ablation behavior in an arc combustion process; using a Gaussian-Laplacianedge operator to filter the original image to achieve complete separation of arc light and an electrode, and obtaining the edge of the splashing liquid drop; Reconstructing the splashing liquid dropand extracting position and shape information of the splashing liquid drop based on an image gray threshold binaryzation method, and obtaining a motion track of the splashing liquid drop through framesuperposition; And obtaining the spatter ablation rate based on a multi-target particle matching algorithm. Through the combination of an optical imaging means and a digital image processing technology, visualization and in-situ measurement of the electrode ablation behavior in the arcing process are achieved, testing of the gas arc ablation behavior is expanded, the method provides a direct anduseful scientific basis for in-depth and complete understanding of the gas arc-electrode mechanism and the process of sputter ablation..

The invention discloses a PCB secondary and multiple accurate punching method based on visual tracking. After the image information of the PCB is obtained through the vision system, the image information is subjected to binaryzation through a cvThreshold function; calculating a communication domain which exists on the processed image by utilizing a FindBlobs function, and filtering the communication domain which is smaller than the area; accurately positioning the edge by means of a Zernike moment edge operator in the possible edge points after all possible edge points are quickly found through a Sobel operator, and calculating to obtain the center position coordinates of the Mark points or the prefabricated hole according to the edge coordinates. The data volume of the points needing to be calculated is greatly reduced, and the speed of determining the center coordinates is increased, and the accuracy is not lost; by adopting a multi-time punching mode, the center coordinates of the prefabricated hole are positioned again during each punching, and the deviation problem possibly caused by single positioning is corrected, the drill bit is a grinding process of the edge of the prefabricated hole punched previously during multiple times of punching, and the precision is far higher than that of the single punching.

The invention relates to a target celestial body image culmination circle judgment method for deep space detection autonomous navigation. The method comprises: carrying out edge extraction on a target celestial body image, wherein a traditional edge operator method is adopted to carry out edge point extraction; selecting a candidate arc segment; carrying out fitting judgment; and carrying out culmination circle supplement judgment. A fitting precision of a center position of a target celestial body image can be directly affected if a culmination circle of a space target is not judged and is eliminated. With the present invention, a problem of target celestial body culmination circle judgment in interplanetary detection can be solved, and culmination circle judgment is adopted to find a true edge point to carry out target celestial body center position fitting so as to enhance a positioning precision of the celestial body image target center; and important engineering use values are provided for developments of high robustness, high refresh rate and high precision navigation celestial body sensors.

The invention relates to a fine-grained classification method for fashionable women's wear images based on component detection and visual characteristics, belonging to the field of computer vision andimage application. The invention firstly detects the parts of the body part of the input fashion women's wear image to be classified and the image in training. Secondly, the detected images of fashion women 's wear are extracted respectively, and the HOG, LBP, color histogram and edge operator of fashion women' s wear images are trained to get the feature extracted images. Then, the defined visual feature descriptors are matched with the extracted four underlying features, and multi-class SVM is used to supervise the learning and training of the fine-grained classifier model. Finally, throughthe fine-grained classifier after training, the fashion women 's clothing image undergone the features classifying achieves fine-grained classification, fashion women' s clothing image classificationresults are output. The detection and classification method adopted by the invention has high accuracy.

The invention discloses an image denoising method based on an adaptive weight total variational model. An adaptive weighted total variational model is constructed. A non-local mean filter is used to process the noisy image to obtain an estimated de-noisy image. After preprocessing, four edge operators are used to detect the noisy image so as to obtain and edge detection image, and the adaptive normal parameters are defined according to the four edge operators. The pixels of the edge detection image are reset according to the adaptive normal form parameters to obtain the weight matrix of the noisy image. The denoised image is obtained by substituting the estimated denoised image, the adaptive normal form parameters and the weight matrix into the adaptive weighted total variational model. The invention can self-adaptively separate the edge region and the smooth region of the image according to the image characteristics, and the image texture and the edge are kept while noise is removed,thereby avoiding the generation of the step effect.

The invention discloses a generation method of a computer oil painting and a system thereof. The generation method comprises the following steps: receiving a source image to be processed, determining whether the source image is a color image or a grey-scale image, and if the source image is the color image, converting the color image into the grey-scale image; taking a sampling point in a grid mode on the grey-scale image, and carrying out random offset on the sampling point; using an edge operator in a horizontal direction and an edge operator in a vertical direction to calculate a gradient at the sampling point; calculating a stroke direction; using an edge operator in a 45 DEG direction and an edge operator in a 135 DEG direction to calculate edge intensity in a window; determining a stroke radius; taking a pixel value of a corresponding position of the sampling point on the source image as a pixel value of a present brush; drafting the sampling point according to the stroke direction, the stroke radius and the pixel value of the present brush. By enforcing a technical scheme of the invention, when using a computer to generate the oil painting, the method is simple, and efficiency of realization is high.

The invention relates to an automatic focusing device. The automatic focusing device comprises a lens, a lens driving part, a noise reduction module and a focusing control module; on the basis of the lens, an original image can be generated through light guide of a shot object; the noise reduction module is suitable for obtaining a frequency response result of a pixel point of the original image and outputting a noise reduction image on the basis of the frequency response result of a passband part; the focusing control part is suitable for extracting a spatial domain edge operator in an interested image position of the noise reduction image, and correspondingly multiplying and summarizing the spatial domain edge operator and a pixel value in the interested image position according to the edge direction, such that a spatial domain result is obtained; and the lens driving part is suitable for driving the lens so as to obtain the expected spatial domain result, and driving the lens by taking the position of the lens when the expected spatial domain result is achieved as the focusing position. By means of the invention, the focusing accuracy and the focusing speed of the shot object can be increased under conditions of low contrast texture and weak light.

The invention discloses an obstacle extraction method based on camera data of a train AEB system. The obstacle extraction method comprises the following steps: S1, acquiring an RGB color image in realtime; s2, performing graying, denoising and enhancement processing on the RGB color image; s3, carrying out image track positioning and obstacle crossing detection; s4, carrying out the primary detection of a central obstacle; s5, establishing a detection window; s6, carrying out secondary detection on the middle obstacle; and S7, calibrating the actual distance of the obstacle. An image sequenceon a track in front of a train advancing route is obtained through a monocular camera mounted in front of the train. A simple search algorithm and image morphology processing are used for positioninga rail and detecting a cross-over obstacle. A Canny edge operator extraction mode is used to carry out initial detection on an obstacle arranged in an orbit. A detection window is established, a graylevel co-occurrence matrix method is adopted to carry out secondary detection on a centrally-arranged obstacle, and finally, an IPM model is utilized to calibrate the distance between a train and theobstacle, so that data extraction of the obstacle is realized, and finally, automatic emergency braking of the train is realized.

The invention discloses a curve identification and car height adjusting method for an electronic-controlled air suspension (ECAS) system. The curve identification and car height adjusting method comprises the steps that real-time road information of a curve, where a car is about to go into, in front of the car is obtained through a camera, images are subjected to morphological filtering and region-of-interest dividing treatment, and road traffic signs and lane line information are extracted; the road traffic signs are processed through a method based on RGB color space processing and Canny edge operators, grayscale conversion, threshold segmentation and a Bezier curve model are used for three times of fitting to process a lane line, curve model data are obtained, and model data accuracy isimproved through dynamic detection; and finally, the safety car height for curve passing is calculated through the curve model data to serve as the target height, a height adjusting signal is outputto the ECAS system through the car height adjusting method, and thus the car is adjusted to the safety car height before curve passing. Compared with the prior art, the curve identification and car height adjusting method has the characteristics of high identification accuracy and scene pertinence, and travelling safety during curve passing of the car is ensured.

The invention discloses a multi-function edging device. One end of an adjusting arm is movably riveted to a base and can be fixed via a stop bolt; the other end of the adjusting arm is connected with a protective baffle; the protective baffle can be arranged between the eyes of an edging operator and an edging part for shielding by rotationally adjusting the adjusting arm; a sliding groove is formed in the side wall of the base in the circumferential direction; an arc splash plate is close to and fitted to the side wall of the base; the bottom end of the arc splash plate is embedded in the sliding groove, so that the arc splash plate can slide in the circumferential direction of the base; and a magnifying lens extending outwards is also arranged on the adjusting arm, is connected with the adjusting arm through a gooseneck, and can be placed between the protective baffle and a millstone by adjusting the gooseneck. The multi-function edging device is simple in structure and convenient to use, and can effectively prevent edging chippings from splashing all around or even enter the eyes of the edging operator, so that the safety of the edging operator and surrounding materials is guaranteed; and moreover, waste materials can be recycled, so that the resource utilization rate is improved.

The invention discloses a method for intelligently detecting moving vehicles in front of vehicles. The method comprises the following steps of: S1, acquiring a front road video image, and carrying outpreprocessing such as image clipping, image graying, image filtration and image binarization on the image; S2, strengthening road image edge information by adoption of a Canny edge operator; S3, detecting a lane line by adoption of an improved Hough transformation method; S4, segmenting a vehicle bottom shadow, and carrying out morphological correction, wherein only a series of shadow horizontalline areas remain in the corrected image; S5, establishing rectangular frames of possible vehicles, namely, regions of interest (RIO), on shadow horizontal lines; and S6, fusing vehicle texture features and vehicle symmetric features to carry out assumption verification on front vehicles, so as to realize accurate detection of vehicles.