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• Coordinate Systems
  Arrays and matrix coordinates in BoofCV are all zero-indexed (unlike 1-indexed libraries like [https://www.mathworks.com/products/matlab.html Matl ...er-extent is the bottom-right corner and has the value of (width-1, height-1).
  3 KB (441 words) - 13:07, 10 October 2021
• Example Color Space
  ...m.out.printf("Found RGB->HSV = %5.2f %5.3f %5.1f\n", pixelHsv[0], pixelHsv[1], pixelHsv[2]); ColorHsv.hsvToRgb(pixelHsv[0], pixelHsv[1], pixelHsv[2], pixelRgb);
  2 KB (231 words) - 15:58, 17 January 2022
• Example Convolution
  kernel.offset = 1; // specify the kernel's origin kernel.data[0] = 1;
  3 KB (356 words) - 15:59, 17 January 2022
• Example Image Derivative
  gui.addImage(VisualizeImageData.colorizeSign(derivX, null, -1), "Sobel X"); gui.addImage(VisualizeImageData.colorizeSign(derivY, null, -1), "Sobel Y");
  3 KB (385 words) - 16:03, 17 January 2022
• Example Webcam Capture
  ConfigGeneralDetector configDetector = new ConfigGeneralDetector(-1,8,1); PkltConfig configKlt = new PkltConfig(3,new int[]{1,2,4,8});
  2 KB (254 words) - 05:53, 28 March 2016
• Example Image Pyramid
  Image:Example_image_pyramid.png | Cartoon showing a pyramid with 1,2,4 scaling. ConfigDiscreteLevels.levels(4), -1, 2, true, ImageType.single(imageType));
  5 KB (632 words) - 16:11, 17 January 2022
• Validation:Algorithms
  {| class="wikitable" border="1" {| class="wikitable" border="1"
  5 KB (616 words) - 12:07, 11 June 2014
• Example Color Histogram Lookup
  * 1) How to construct a histogram in 1D, 2D, 3D, ..etc, 2) Histograms are just Planar<GrayF32> rgb = new Planar<>(GrayF32.class, 1, 1, 3);
  8 KB (1,006 words) - 16:15, 17 January 2022
• Example Bundle Adjustment Graph
  numCameras, /*views*/ numMotions*numCameras, /* motions */numMotions + 1, structure.setCamera(1, true, intrinsic1);
  6 KB (826 words) - 17:48, 2 September 2022
• Example Watershed with Seeds
  ...ions = BinaryImageOps.contour(filtered, ConnectRule.EIGHT, label).size() + 1; // +1 to regions because contour only counts blobs and not the background
  3 KB (445 words) - 16:33, 17 January 2022
• Example Color Segmentation
  System.out.println("H = " + color[0] + " S = " + color[1] + " V = " + color[2]); showSelectedColor("Selected", image, color[0], color[1]);
  4 KB (574 words) - 16:25, 17 January 2022
• Example Binary Image
  In a binary image each pixel can have a value of 0 or 1. Binary images are easy to compute and fast to process, which makes them p GrayU8 filtered = BinaryImageOps.erode8(binary, 1, null);
  3 KB (375 words) - 15:57, 17 January 2022
• Example Android Fragment Gradient
  var bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888) var bitmapWork = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888)
  5 KB (521 words) - 15:16, 15 July 2023
• Example Video Mosaic
  configDetector.general.threshold = 1; ...new Homography2D_F64(0.5, 0, frame.width/4, 0, 0.5, frame.height/4, 0, 0, 1);
  6 KB (837 words) - 11:17, 12 July 2021
• Example Background Stationary Camera
  // Declare storage for segmented image. 1 = moving foreground and 0 = background var gui = new ImageGridPanel(1, 2);
  3 KB (372 words) - 14:14, 12 July 2021
• Example Image Blur
  // size of the blur kernel. square region with a width of radius*2 + 1 GBlurImageOps.gaussian(input, blurred, -1, radius, null);
  2 KB (313 words) - 16:00, 17 January 2022
• Example Fit Ellipse
  GrayU8 filtered = BinaryImageOps.erode8(binary, 1, null); filtered = BinaryImageOps.dilate8(filtered, 1, null);
  2 KB (309 words) - 14:02, 17 January 2022
• Example Video Stabilization
  ImageGridPanel gui = new ImageGridPanel(1, 2); gui.setImage(0, 1, new BufferedImage(frame.width, frame.height, BufferedImage.TYPE_INT_RGB));
  4 KB (454 words) - 11:18, 12 July 2021
• Tutorial Kinect
  Planar<GrayU8> rgb = new Planar<GrayU8>(GrayU8.class,1,1,3); GrayU16 depth = new GrayU16(1,1);
  5 KB (569 words) - 18:44, 3 January 2017
• Example Superpixels
  * interface will have each pixel assigned a unique label from 0 to N-1, where N is the number of regions. GBlurImageOps.gaussian(color, color, 0.5, -1, null);
  6 KB (643 words) - 16:26, 17 January 2022
• Example Image Stitching
  new ConfigFastHessian(1, 2, 200, 1, 9, 4, 4), null, null, imageType); ...omography2D_F64(scale, 0, colorA.width/4, 0, scale, colorA.height/4, 0, 0, 1);
  9 KB (1,055 words) - 15:54, 17 January 2022
• Example Image Filter
  ...three examples. In BoofCV there are often three ways to invoke a function; 1) procedural, 2) generalized, and 3) abstracted. BlurImageOps.gaussian(input, blurred, -1, blurRadius, null);
  9 KB (1,198 words) - 16:05, 17 January 2022
• Example Android Gradient
  private GrayS16 derivX = new GrayS16(1,1); private GrayS16 derivY = new GrayS16(1,1);
  6 KB (816 words) - 15:23, 15 July 2023
• Example Associate Three View
  ...hich form a "ring", that is that when traversed from image 1 -> 2 - > 3 -> 1 you wind up FactoryAssociation.greedy(new ConfigAssociateGreedy(true, 0.1), scorer);
  6 KB (743 words) - 13:31, 17 January 2022
• Example Dense Optical Flow
  ...optical flow is very computationally expensive. Just process the image at 1/2 resolution PanelGridPanel gui = new PanelGridPanel(1, 2);
  3 KB (390 words) - 10:41, 12 July 2021
• Example Background Moving Camera
  background.setUnknownValue(1); // storage for segmented image. Background = 0, Foreground = 1
  6 KB (649 words) - 14:13, 12 July 2021
• Example Detect Describe Interface
  ...er = FactoryDetectPoint.createShiTomasi(new ConfigGeneralDetector(1000, 5, 1), null, derivType); InterestPointDetector detector = FactoryInterestPoint.wrapPoint(corner, 1, imageType, derivType);
  4 KB (418 words) - 13:58, 17 January 2022
• Example Discrete Fourier Transform
  // Make the image scaled from 0 to 1 to reduce overflow issues boxImage.set(xx, yy, 1.0f/(15*15));
  5 KB (619 words) - 11:55, 12 July 2021
• ExampleTrifocalTensorUses
  // Camera matrix for view-1, P1, is going to be identity // Scale is arbitrary so let's make it norm of 1
  4 KB (500 words) - 13:03, 12 July 2021
• ExampleComputeTrifocalTensor
  associateThree.detectFeatures(gray02, 1); configRansac.inlierThreshold = 1;
  4 KB (486 words) - 17:31, 17 January 2022
• Coding Standards
  BlurImageOps.gaussian(input,output,-1,3,storage); ...lter<ImageFloat32> filter = FactoryBlurFilter.gaussian(ImageFloat32.class,-1,3);
  6 KB (923 words) - 05:04, 6 October 2011
• Performance:SURF
  {| cellpadding="5" cellspacing="0" border="1" | Reference || 1.0.9 || C++ || No || http://www.vision.ee.ethz.ch/~surf/
  13 KB (1,854 words) - 12:39, 25 September 2014
• Tutorial Videos and Webcams
  GrayU8 gray = new GrayU8(1,1);
  4 KB (707 words) - 18:41, 3 January 2017
• Example Calibration Target Pose
  viewer.setCameraToWorld(new Se3_F64(rotY, new Vector3D_F64(0.75, 0, 1.25)).invert(null)); var gui = new PanelGridPanel(1, imagePanel, viewerComponent);
  5 KB (604 words) - 15:45, 17 January 2022
• Example Load and Save Point Clouds
  original.append(new Point3D_F64(i, i + 1, -i));
  2 KB (244 words) - 15:09, 12 July 2021
• Example Calibrate Planar Mono
  Example File: [https://github.com/lessthanoptimal/BoofCV/blob/v1.1.0/examples/src/main/java/boofcv/examples/calibration/ExampleCalibrateMonocu ...circleRegularGrid(null, new ConfigGridDimen(/*numRows*/ 8, /*numCols*/ 10, 1.5, 2.5));
  5 KB (577 words) - 19:05, 9 September 2023
• Example Scene Recognition
  * In BoofCV, scene recognition [1] refers to the problem of trying to identify photos of the same scene (not * [1] As far as I can tell there is no universal terminology for this specific s
  5 KB (680 words) - 17:41, 2 September 2022
• Example Render Aztec Code
  ...AztecGenerator.renderImage(/* pixel per square */ 10, /* border squares */ 1, marker);
  2 KB (257 words) - 17:31, 2 September 2022
• Tutorial Quick Start
  | generics || Allows strong typing in abstracted code. Introduced in Java 1.5. Click [http://docs.oracle.com/javase/tutorial/java/generics/index.html BufferedImage out = VisualizeImageData.grayMagnitude(derivX,null,-1);
  11 KB (1,505 words) - 14:02, 21 April 2017
• Example Stereo Uncalibrated
  ...F = ExampleComputeFundamentalMatrix.robustFundamental(matches, inliers, 0.1); DMatrixRMaj H = MultiViewOps.createProjectiveToMetric(K, v.x, v.y, v.z, 1, null);
  10 KB (1,204 words) - 17:34, 17 January 2022
• Example View Point Cloud
  // around 1,000,000 points
  2 KB (266 words) - 15:08, 12 July 2021
• Example Render Micro QR Code
  * [https://github.com/lessthanoptimal/BoofCV/blob/v0.40.1/examples/src/main/java/boofcv/examples/fiducial/ExampleRenderMicroQrCode.ja ...QrCodeGenerator.renderImage(/* pixel per module */ 10, /* border modules*/ 1, qr);
  2 KB (293 words) - 12:00, 24 January 2022
• Example Calibrate Planar Multi
  Example File: [https://github.com/lessthanoptimal/BoofCV/blob/v1.1.0/examples/src/main/java/boofcv/examples/calibration/ExampleCalibrateMulti. ConfigECoCheckMarkers.parse("14x10n1", /* square size */1.0));
  4 KB (459 words) - 19:06, 9 September 2023
• Example Morphological Thinning
  GrayU8 thinned = BinaryImageOps.thin(binary, -1, null);
  2 KB (294 words) - 16:07, 17 January 2022
• Tutorial Image Segmentation
  ...o 1 and 0 to the rest. Typically the pixels which are assigned a value of 1 are an object of interest. BoofCV provides both global and adaptive (local) ...hen all pixels with a value less than or equal to the threshold are set to 1.
  10 KB (1,444 words) - 21:02, 7 December 2016
• Example Detect Corners
  // a large radius is used to exaggerate weighted/unweighted affects. Try 1 or 2 for a typical value
  3 KB (335 words) - 16:05, 2 September 2022
• Example Fit Polygon
  GrayU8 filtered = BinaryImageOps.erode8(binary, 1, null); filtered = BinaryImageOps.dilate8(filtered, 1, null);
  6 KB (750 words) - 14:02, 17 January 2022
• Example Template Matching
  VisualizeImageData.grayMagnitude(intensity, output, -1); drawRectangles(g2, image, templatePaint, null, 1);
  6 KB (830 words) - 16:19, 17 January 2022
• Example Detect Micro QR Code
  VisualizeShapes.drawPolygon(qr.bounds, true, 1, g2); VisualizeShapes.drawPolygon(qr.bounds, true, 1, g2);
  3 KB (382 words) - 09:49, 10 November 2022
• Example Three View Stereo Uncalibrated
  new ConfigFastHessian(0, 4, 1000, 1, 9, 4, 2), null, null, GrayU8.class); associateThree.detectFeatures(image02, 1);
  17 KB (2,003 words) - 17:36, 17 January 2022

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