B, a, b, . , https://blog.csdn.net/qq_35831978/article/details/106988028. VSC++opencv, NugetNugetopencvsharp, OPENCV4.runtime , CvtColor(InputArray src, OutputArray dst, ColorConversionCodes code, int dstCn = 0) src dst code dstcn , ColorConversionCodes.c#pythonBGR2GRAY, sizenew OpenCvSharp.Size(11,11), C#OpenCVSharp contourshierarchycontours.LengthCv2.ContourArea(contours[i]);, public void redefineWH(int weight, int hight, int maxSize, int[] size) public int target_judgment(Mat pBkImage, Mat pFrImage) public int object_judgment(string pBkImage_file, string pFrImage_file), object_judgmentc#, -1 0 1, johannyan:

, . L2gradient ]]]) # () void mixChannels( The demo will load existing Caffe model (see another tutorial here) and use fgbg = cv2.bgsegm.createBackgroundSubtractorGMG() while(1): apertureSize[, # apertureSizeSobel threshold2, # 2 OpenCVcvtColor OpencvcvtColor CV_EXPORTS_W void cvtColor( InputArray src, OutputArray dst, int code, int dstCn = 0 ); // Scalar color = Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255)); // drawContours(drawing, contours_poly, i, color, 1, 8, vector(), 0, Point()); // rectangle(drawing, boundRect[i].tl(), boundRect[i].br(), color, 2, 8, 0); // circle(drawing, center[i], (int)radius[i], color, 2, 8, 0); //namedWindow("Contours", CV_WINDOW_AUTOSIZE); //Mat pBkImage_mid, pFrImage_mid, pBkImage_resize, pFrImage_resize; //. OpenCV-PythongetStructuringElementNumPyndarray() camshiftdemo.cpp ffilldemo.cpp, hog.cpp houghcircles.cpp houghlines.cpp lkdemo.cpp Sobel_Demo.cpp train_HOG.cpp watershed.cpp. , ,: pycharm, RGBHSVRGBRGBHSVHSVHSVRGB RGBHSV, HSV Hhue Ssaturation Vvalue, A. Version1.0 temp_003.pyQuantize()https://blog.csdn.net/wsp_1138886114/article/details/102880931.pytemp_003temp_003.py, https://blog.csdn.net/wsp_1138886114/article/details/82935839, https://blog.csdn.net/wsp_1138886114/article/details/81368890, OpenCVPython findContours\ boundingRect\rectangle, WindowsWSL2 ubuntu dockernvidia-docker, LaplacianLog/Marr(KirschNevitia). V: 0 255 json hashmap , FIGHTErS87: opencvGaussianBlur(). This problem is being handled by the Background Subtraction algorithms provided by OpenCV. abe3. The demo is derived from MobileNet Single-Shot Detector example provided with opencv.We modify it to work with Intel RealSense cameras and take advantage of depth data (in a very basic way). CV_8U, CV_16U, CV_16S, CV_32F or CV_64F, , 2erode -> erode -> dilate -> dilate, BORDER_CONSTANT = 0 i iiiiii | abcdefgh | iiiiiii, BORDER_REPLICATE = 1aaaaaa | abcdefgh | hhhhhhh, BORDER_REFLECT = 2fedcba | abcdefgh | hgfedcb, BORDER_WRAP = 3 cdefgh | abcdefgh | abcdefg, BORDER_REFLECT_101 = 4 gfedcb|abcdefgh|gfedcba, BORDER_TRANSPARENT = 5 uvwxyz | abcdefgh | ijklmno, BORDER_REFLECT101 = BORDER_REFLECT_101 same as BORDER_REFLECT_101, BORDER_DEFAULT = BORDER_REFLECT_101 same as BORDER_REFLECT_101, BORDER_ISOLATED = 16< do not look outside of ROI. Whats interesting is that the results (the rectangle marking the barcode) differ from opencv 3.2.0 to 3.3.0 with opencv 3.2.0 also not finding the barcode. I've converted some pdf pages into images that contains tables.I want to crop those tables from the images and save as separate images.I'm new to Open CV and any guidance will be helpful.I want to know which algorithms should i use and how to do it.If any tutorials are there please post the links.I'm using OpenCV 3.0.0 and visual studio 2013. # frame = cv2.imread('/home/pi/python3/opencv/color-test/colour-circles-test.jpg'), 'C:/Users/Administrator/Desktop/IMG_20200628_170115.jpg'. size_t ndsts,// true L2 [, edges[, # @Author : ZY OpenCV-Python Canny() &quot;&quot;&quot;cv2.Canny(image, # threshold1, threshold2, # 2 [, edges[, apertureSize[, # ,,,,,,,!. mixChannels() kernel = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (3, 3)) # initializing subtractor . # Put mask over top of the original image. http://www.juzicode.com/opencv-python-erode-dilate, OpenCVkernel, 11CV8U255, kernelksizeiterations, 111CV8U255, kernelksizeiterations, MORPH_RECTMORPH_CROSSMORPH_ELLIPSE, 17, PythonOpenCV pencilSketchmat is not a numerical tuple, OpenCV-Python~(erode,dilate), PythonOpenCV WeChatQRCodeutils::fs::exists(detector_prototxt_path) in function cv::wechat_qrcode::WeChatQRCode::WeChatQRCode, srcCV_8U, CV_16U, CV_16S, CV_32F or CV_64F. c++opencvopencvc++ imread(path)VideoCapture param borderValue Border value in case of a constant border. 1. const int* fromTo,//, //pBkImagepBkImage_copy, //InterpolationFlags.Lineardouble, "C:/Users/liu/source/repos/car_segment_1/car_segment", "/photo/background_absdiff/Wide_angle_78_1/0.jpg", "/photo/background_absdiff/Wide_angle_78_1/15.jpg". cv2.Canny(image, # H: 0 180 OpencvHSVH0-180S0-255V0-255 PSH2S255V255opencvHSV 2.OpenCVPython3. opencvCanny() # just add some colours to edges from original image. OpenCVkernel threshold1, . : 1.1 RGBHSVRGBRGBHSVHSVHSVRGB RGBHSV1.2 HSV, . # -*- coding: utf-8 -*- opencvCanny(). opencvHSVH0-180S0-255V0-255. S: 0 255 Python+OpenCVCanny CannyJohn F. Canny1. OpenCVROI ROIregion of interest1. ROI 2.ROI Rect : . opencvCanny(). HSVHSV 2. Basic school geometry and simultaneous equations, something like: Maybe you could 1cv2.Sobel(src, thresh1, thresh2) , """ "" -Sobel opencv opencv opencv-4.5.4sourcesourcebuil In this article, we will learn how to use contours to detect the text in an image and save it to a text file. I tested python 2.7 and 3.6 with both opencv 3.2.0 and 3.3.0. 8-bit imagescvtColor()32-bit images8-bit images. Using BackgroundSubtractorMOG. PSH2S255V255opencvHSV PSHSV const Mat* src, //, usb30FPS DNN example shows how to use Intel RealSense cameras with existing Deep Neural Network algorithms. R. Smith1978, (Hexcone Model) (1)Hhue0360 0120,240 60180,300 (2)Ssaturation0.01.0 (3)Vvalue0()255(, PSHSV, (r, g, b) 0 1 max r, g b min HSV (h, s, v) h [0, 360 s, v [0,1] , OpenCVRGBHSVOpenCVH [0, 180 S [0, 255] V [0, 255]HSVSHSVHV H100140SV90255H Orange 0-22Yellow 22- 38Green 38-75Blue 75-130Violet 130-160Red 160-179, HSVHSVRBGHSVPs http://blog.csdn.net/taily_duan/article/details/51506776, PSHSVH0-360S0-1VB0-1 OpencvHSVH0-180S0-255V0-255 PSH2S255V255opencvHSV, Version1.0 , , [1]https://blog.csdn.net/qq_15947787/article/details/72784253 opencvHSV [2]https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_trackbar/py_trackbar.html [3]https://blog.csdn.net/weixin_39490421/article/details/85998984 opencv3.1 HSV, Distance_JC: falseL1 : . cv2.getStructuringElement() : Here the shape and size of the kernel can be passed as parameters and accordingly a matrix is generated. //cout << "pBkImage_resize.col: v " << pBkImage_resize.cols << endl; //cout << " pBkImage_resize.rows: v " << pBkImage_resize.rows << endl; //cout << "pFrImage_resize.col: v " << pFrImage_resize.cols << endl; //cout << " pFrImage_resize.rows: v " << pFrImage_resize.rows << endl; //namedWindow("pBkImage_resize", CV_WINDOW_AUTOSIZE); //imshow("pBkImage_resize", pBkImage_resize); //namedWindow("pFrImage_resize", CV_WINDOW_AUTOSIZE); //imshow("pFrImage_resize", pFrImage_resize); https://blog.csdn.net/sinat_37281674/article/details/119987327, 1OpenCvSharp4OpenCvSharp4.runtime.win, C#Newtonsoft.Json(Json.NET)json. OpenCV-PythongetStructuringElementNumPyndarray() 24138BGR, rgb, RGB L*u*v*8-bit image32-bit floating-point image, 255 for CV_8U, 65535 for CV_16U, 1 for CV_32F. //Cv2.FindContours(Image_morp, contours, hierarchy, RETR_EXTERNAL, CHAIN_APPROX_SIMPLE, Point(0, 0)); //vector > contours_poly(contours.size()); //vector boundRect(contours.size()); //vectorcenter(contours.size()); //cout << "contours.size(): " << contours.size() << endl; //approxPolyDP(Mat(contours[i]), contours_poly[i], 3, true); //boundRect[i] = boundingRect(Mat(contours[i])); //image_area += contourArea(contours[i]); //cout << boundRect[i].x << " ii " << endl; //cout << boundRect[i].y << " ii " << endl; //cout << boundRect[i].width << " ii " << endl; //cout << boundRect[i].height << " ii " << endl; //cout << boundRect[i] << " ii " << endl; //xs.push_back(boundRect[i].x + boundRect[i].width); //xy.push_back(boundRect[i].y + boundRect[i].height); //minEnclosingCircle(contours[i], center[i], radius[i]); //x_max = *max_element(xs.begin(), xs.end()); //x_min = *min_element(xs.begin(), xs.end()); //y_max = *max_element(xy.begin(), xy.end()); //y_min = *min_element(xy.begin(), xy.end()); //cout << "src.col: v " << pBkImage.cols << endl; //cout << " src.rows: v " << pBkImage.rows << endl; //cout << " : " << image_area << endl; //Mat drawing = Mat::zeros(Image_threshold.size(), CV_8UC3); //for (int i = 0; i < contours.size(); i++). # @Time : 2021/12/28 17:07 # @Site : OpenCV4OCR&OCR GitHub #frameBGR = cv2.bilateralFilter(frameBGR, 15 ,75, 75). Mat* dst, //,src[0] opencvcvtColor()APIC++ API void cv::cvtColor ( InputArray src, 8-bit unsigned / 16-bit unsigned / single-precision floating-point C++. bin, 1.1:1 2.VIPC. , threshold1threshold1threshold2threshold2, https://blog.csdn.net/duwangthefirst/article/details/79956616, WindowsOpenCV 3.4.0 + Visual Studio 2015, remove alpha channel from RGB or BGR image, convert between RGB and BGR colorspaces(with or without alpha channel), convert between RGB/BGR and BGR565(16-bit images), convert between grayscale and BGR565(16-bit images), convert between RGB/BGR and BGR555(16-bit images), convert between grayscale and BGR555(16-bit images). Computer Versionshort for, APIC++ OpencvExample vtest.mp4 ROI . kernelMat(),3 x 3 getStructuringElement() anchor(-1,-1)kernel borderType BORDER_CONSTANT OpenCVC++,OpenCVC++ You would have to go though pairs of lines say ax1,ay1 to ax2,ay2 c.f. To use BackgroundSubtractorMOG we can use. GMM 2. #640*480 threshold1threshold1threshold2threshold2, 1.1:1 2.VIPC. OpenCV (Open source computer vision) is a library of programming functions mainly aimed at real-time computer vision.OpenCV in python helps to process an image and apply various functions like resizing image, pixel manipulations, object detection, etc. C#OpenCVOpenCVOpenCvSharp4OpenCvSharp4.runtime.winC#OpenCVOpenCVOpenCvSharp4OpenCvSharp4.runtime.winVSC++ opencvCanny(). bx1,by1 to bx2,by2 you can find the point where the gradient at right angles (-1 over gradient of line) to a crosses line b. //pBkImage = imread("./photo/background_absdiff/Wide_angle_78_1/0.jpg"); //pFrImage = imread("./photo/background_absdiff/Wide_angle_78_1/14.jpg"); //cout << " height: " << height << endl; //namedWindow("pBkImage_mid", CV_WINDOW_AUTOSIZE); //namedWindow("pFrImage_mid", CV_WINDOW_AUTOSIZE); //Cv2.Resize(pBkImage_mid, pBkImage_resize, new OpenCvSharp.Size(image_size[0], image_size[1]), InterpolationFlags.Linear); //xyresize, //Cv2.Resize(pFrImage_mid, pFrImage_resize, new OpenCvSharp.Size(image_size[0], image_size[1]), InterpolationFlags.Linear); //xyresize. c++opencvopencvc++ imread(path)VideoCapture 4, 20221207: OpenCV.OpenCVintPython114 #, "", (c++ opencv)--1OpencvmorphologyExvoid morphologyEx( InputArray src, OutputArray dst, int op, InputArray kernel, Point anchor = Point(-1,-1), int iterations = RGBHSV RGBHSV()HSV(3ucky(3all/CCBY-SA(http://crea # Initial HSV GUI slider values to load on program start. , : convert RGB/BGR to HLS(hue lightness saturation). The default value has a special meaning. Demosaicing using Variable Numberof Gradients. maskmask 1. : threshold1threshold1threshold2threshold2. # Blur methods available, comment or uncomment to try different blur methods. opencvcv2.getStructuringElement() OpenCV OpenCV C ++CPython Java OpenCV """. convert RGB/BGR to HSV(hue saturation value). temp_003.pyQuantize()https://blog.csdn.net/wsp_1138886114/article/details/102880931.pytemp_003temp_003.py, weixin_39346222: vx, 1.1:1 2.VIPC, C#OpenCVOpenCVOpenCvSharp4OpenCvSharp4.runtime.winC#OpenCVOpenCVOpenCvSharp4OpenCvSharp4.runtime.winVSC++opencvNugetNuget,

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