Emgu cv documentation. CV IInputArray Optional mask.

Emgu cv documentation NET compatible languages. The wrapper can be compiled by Visual Studio, Unity and "dotnet" command, it can run on Learn the basics of Emgu CV, from creating your first project to covering the main areas of the computer vision field, with Emgu CV Essentials. com/emgucv/emgucv/issues Parameters src Type: Emgu. That is, the function processes each element of src as following: dst(I)=lut[src(I)+DELTA] where DELTA=0 if src has depth CV_8U, and DELTA=128 if src has depth CV_8S Mahalanobis Calculates the weighted distance between two vectors and returns it Parameters points Type: Emgu. CvEnum MorphOp Type of morphological operation. Some descriptor matchers(for example, BruteForceMatcher) have an empty implementation of this method. 0; The Windows Commercial license will also include the UWP release for ARM architecture in v4. CV IInputArray The input 8-bit single-channel grayscale image circles Type: Emgu. Net Standard 2. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Read point cloud from file. 2 unless otherwise noted. The function is typically used to get bi-level (binary) image out of grayscale image (cvCmpS could be also used for this purpose) or for removing a noise, i. Emgu CV is a cross platform . Similar to the color conversion, we have two ways of how we can blur the image. Non-zero pixels indicate the area that needs to be inpainted dst Type: Emgu. Nuget will download Emgu CV commercial release and configure the project for you. 0 and the nuget package installation will require an Emgu. Mat Class. If you are looking for tutorial and examples on using Emgu CV, please visit our Tutorial page. . Wrapper of OpenCV's image processing functions. Draws a marker on a predefined position in an image. Base functions (L1) can be found in CvInvoke class cvCalcOpticalFlowPyrLK Method (IntPtr, IntPtr, IntPtr, IntPtr, PointF[], PointF[], Int32, Size, Int32, Byte[], Single[], MCvTermCriteria, LKFLOW_TYPE) A cross platform . CV IInputArray Input 1-, 3-, or 4-channel image; when ksize is 3 or 5, the image depth should be CV_8U, CV_16U, or CV_32F, for larger aperture sizes, it can only be CV_8U. CV IOutputArray The output array; in-place operation is supported alpha (Optional) Type: System Double The minimum/maximum value of the output array or the norm of output array beta (Optional) Type: System Double The maximum/minimum value of the output array normType (Optional) Type: Emgu The Image viewer that display IImage. 1 release is available in github and nuget Type: Emgu. NET languages. The mask is initialized by the function when mode is set to GC_INIT_WITH_RECT. CV IOutputArray ids of the diamonds in diamondCorners. CV IInputArray First input 2D point set. com [1] Release the managed resources. 1 release; 4. Share. 1 Online Documentation. Mat Constructor (SerializationInfo, StreamingContext) Mat Constructor (String, ImreadModes) Mat Constructor (Mat, Rectangle) Mat Constructor (Size, DepthType, Int32) Routines for correcting image color gamma. CV IOutputArray Destination array; must be either the same type as src or 8-bit. Each of them can have an arbitrary number of channels. Draws the line segment between pt1 and pt2 points in the image. ColumnSumFilter Class. See convertMaps() for details on converting a floating point representation to fixed-point for speed. line Type: Emgu. low In this link you can study the emgu cv api and find all methods description and documentation. Converts CvMat, IplImage , or CvMatND to Mat. C# Camera Calibration. CvInvoke Class. Net Standard https://www. Get or set the intensity of the hue color channel ( 0 < hue < 180 ) Trains a descriptor matcher (for example, the flann index). Base functions (L1) can be found in CvInvoke class. Emgu CV has an active user community. 1 Windows release is built with Visual Studio 2017. ; Privacy policy; About Emgu Type: Emgu. If the format, depth or channel order is different Allocates new array data if needed. CV IOutputArray The storage for the circles detected. CV IInputArray Source array (single-channel, 8-bit of 32-bit floating point). emgucv document , free for everyone. :: cvFindContours Method : Retrieves contours from the binary image and returns the number of retrieved contours. method Type: Emgu. A cross platform . Grayscale Wrapper for the CvBlob detection functions. Returns header, corresponding to a specified rectangle of the input array. dst Type: Emgu. https://www. Linemod VectorOfLinemodMatch Template matches, sorted by similarity score. PyrLK Method (Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), PointF[], Size, Int32, MCvTermCriteria, LKFLOW_TYPE, PointF[], Byte[], Single[]) PyrLK Method (Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), PointF[], Size, Int32, MCvTermCriteria, LKFLOW_TYPE, PointF[], Byte[], Single[]) Type: Emgu. Net wrapper to the Intel OpenCV image-processing library. GpuMat Class. Improve this answer. Release the managed resources. CvInvoke Methods. CV IOutputArray The output vector of eigenvalues, stored in the descending order (order of eigenvalues and eigenvectors is syncronized, of course) eigenVectors (Optional) Type: Emgu. NET (C#, VB, C++ and more) Jump to navigation Jump to search If you have any question or concerns, please email to support@emgu. CV IOutputArray Output vector indicating which points are inliers. com. Either using Image. AbsDiff Method . CV IInputArray Second input 2D point set. Content is available under GNU Free Documentation License 1. src2 Type: Emgu. CV IOutputArray output image of the same size and type as src. Emgu CV Library Documentation. If you change the pixel value on the Bitmap, you change the pixel values on the Image object as well! Features matcher similar to BestOf2NearestMatcher which finds two best matches for each feature and leaves the best one only if the ratio between descriptor distances is greater than the threshold match_conf. Net wrapper for the OpenCV image-processing library. GpuMat Fields. The good Wrapper of OpenCV's image processing functions. 2015 Emgu Corporation, All Rights Reserved, The equivalent of cv::Mat, should only be used if you know what you are doing. bat script located in the platforms\windows folder of The OpenCL context created with Video Acceleration context attached it (if not attached yet) for optimized GPU data copy between HW accelerated decoder and cv::UMat. 1 release is available in github and nuget Emgu CV Library Documentation: CvInvoke. e. Drawing Point Anchor position with the kernel. cost (Optional) Type: Emgu. A GpuMat, use the generic version if possible. e. Base functions (L1) can be found in CvInvoke class https://www. Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control. The Get property provide a more efficient way to convert Image<Gray, Byte>, Image<Bgr, Byte> and Image<Bgra, Byte> into Bitmap such that the image data is shared with Bitmap. It can be a memory storage (in this case a sequence of circles is created in the storage and returned by the function) or single row/single column matrix (CvMat*) of type CV_32FC3, to which the circles' Type: Emgu. The wrapper can run on Windows, Android, iOS, Mac OS and Linux. Net wrapper for the Open CV image-processing library. The wrapper can be compiled in Mono and run on Linux / Mac OS X. CUDA release is built with CUDA 10. CudaBackgroundSubtractorFGD Class. 2015 Emgu Corporation, All Rights Reserved, Emgu CV Library Documentation: CvInvoke. Type: Emgu. GpuMat Properties. They all should have the same depth, CV_8U or CV_32F , and the same size. CvEnum DepthType Optional depth of the output array For every point in one of the two images of stereo-pair the function cvComputeCorrespondEpilines finds equation of a line that contains the corresponding point (i. threshold Type: System Single Similarity threshold, a percentage between 0 and 100. Run Build_Binary_x86-64_doc. Other matchers really train their inner structures (for example, FlannBasedMatcher trains flann::Index ). 2019-10-06 Emgu. CV IInputArrayOfArrays The equivalent of cv::Mat. For non-antialiased lines with integer coordinates the 8-connected or 4-connected Bresenham algorithm is used. You can also check the Open CV ebook and this one with tutorials. If disposing equals true, the method has been called directly or indirectly by a user's code. CV IInputArray Image where the search is running. The Ptr property points to the label image of the cvb::cvLabel function. If it is negative the contour interiors are drawn lineType (Optional) Type: Emgu. map2 Type: Emgu. Net wrapper to the OpenCV image processing library. It should be 8-bit or 32-bit floating-point templ Type: Emgu. Its elements may have one of following values: 0 (GC_BGD) defines an obvious background pixels. Contribute to sagaii/emgucvdocument development by creating an account on GitHub. CV IInputArray Input vector of 2D or 3D points, stored in std::vector or Mat. Symbols that do not belong to the specified font are replaced with the rectangle symbol. 4. CV_DIST_USER means that a pre-calculated cost matrix cost is used. The non generic version is good for use as buffer in stream calls. AccumulateProduct Method . matches Type: Emgu. AlphaCompTypes Enumeration. CV IOutputArray The output image of the same format and the same size as input inpaintRadius Type: System Double Draws a rectangle specified by a CvRect structure Emgu. These functions try to compose the given images (or images stored internally from the other function calls) into the final pano under the assumption that the image transformations were estimated before. This function will be called during the disposal of the current object. channels Type: System Int32 List of the channels used to compute the histogram. to Type: Emgu. For other supported depths, the compression scheme can be specified by this flag; LZW compression is the default. Most often, the function is called with (xorder=1, yorder=0, aperture_size=3) or (xorder=0, yorder=1, aperture_size=3) to calculate first x- or y- image derivative. CV IInputArray Source chessboard view; it must be 8-bit grayscale or color image patternSize CV Capture property identifier. However, even the slowest preset is still relatively fast, use DeepFlow if you need better quality and don't care about speed. CvEnum LineType Type of the contour segments hierarchy (Optional) Type: Emgu. Includes three presets with preselected parameters to provide reasonable trade-off between speed and quality. CV IOutputArray The destination array mask (Optional) Type: Emgu. windows. AlignExposures Class. Open CV is a high performance image processing library by Intel. CV IInputArray input array. CV IInputArray Optional mask. Drawing Size Parameters src Type: Emgu. If any of the passed arrays is of IplImage type, then its ROI and COI fields are used. cvCalcOpticalFlowPyrLK Method (IntPtr, IntPtr, IntPtr, IntPtr, PointF[], PointF[], Int32, Size, Int32, Byte[], Single[], MCvTermCriteria, LKFLOW_TYPE) Saves the image to the specified file. CV IInputArray Input array (multiple-channel, 8-bit or 32-bit floating point). CV IInputOutputArray Input/output 8-bit single-channel mask. mask Type: Emgu. In most case you should use the Matrix class instead Emgu CV Library Documentation From Emgu CV: OpenCV in . In other words, it allows the user to treat a rectangular part of input array as a stand-alone array. So, after few days of struggling - answering my own question. 0. CV IOutputArray Output line parameters. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Emgu CV Library Documentation. CV-4. DIS optical flow algorithm. 1. We have merged the v3. Affine3d Class. Image except that it is being used for GPU processing CudaInvoke: This class wraps the functional PyrLK Method (Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), Image(Gray, Byte), PointF[], Size, Int32, MCvTermCriteria, LKFLOW_TYPE, PointF[], Byte[], Single[]) This interface class allows to build new Layers - are building blocks of networks. dst Release the managed resources. AccumulateSquare Method . The circle is clipped by ROI rectangle. CudaBackgroundSubtractorGMG Class. CV IInputArray The second source array dst Type: Emgu. Other The image format is chosen depending on the filename extension, see cvLoadImage. The function ignores colorModel and channelSeq fields of IplImage header, so the source image color space should be specified correctly (including order of the channels in case of RGB space, e. Dilation can be applied several (iterations) times. Negative values mean that the anchor is at the kernel center For questions and discussions please visit http://www. Saves the image to the specified file. BGR means 24-bit format with B0 G0 R0 B1 G1 R1 layout, whereas RGB Release the managed resources. CV IInputArray The inpainting mask, 8-bit 1-channel image. The line is clipped by the image or ROI rectangle. :: cvLoadImage Method : Loads an image from the specified file and returns the pointer to the loaded image. Change Log. For questions and discussions please visit http://www. CV IOutputArray The destination array scale (Optional) Type: System Double Optional scale factor dtype (Optional) Type: Emgu. ransacReprojThreshold Type: System Double Parameters src Type: Emgu. GpuMat Methods. anchor Type: System. Emgu CV. CV IInputArray The input symmetric square matrix, modified during the processing eigenValues Type: Emgu. Capture() Draws a simple or filled circle with given center and radius. CV. This page was last edited on 17 May 2024, at 20:56. CvEnum RobustEstimationAlgorithm Robust method used to compute transformation. com Finds the edges on the input image and marks them in the output image edges using the Canny algorithm. To learn Parameters image Type: Emgu. CV IInputArray Source image dst Type: Emgu. Emgu TF related questions and discussion can be posted here, and you can use the issue tracker to report bugs. The wrapper can be compiled by Visual Studio, Unity and "dotnet" command, it can run on Windows, Mac OS, Linux, iOS and Android. Emgu. com/emgucv/emgucv/issues Type: Emgu. high frequency spatio-temporal noise reduction; 3. Browse. operation Type: Emgu. x. As far as I understand, there were two issues here: libcvextern. CV IInputArray The first source array. so dependencies were missing. Questions and discussions can be posted on our community discussion forum. Renders the text in the image with the specified font and color. NetStandard 2. dll is now defaulted to . g. This is a vector (vector<Mat>) that contains the rotation matrices for all the transformations from gripper frame to robot base frame. Emgu CV Library Documentation: CvInvoke. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Calculates Laplacian of the source image by summing second x- and y- derivatives calculated using Sobel operator: dst(x,y) = d2src/dx2 + d2src/dy2 Specifying aperture_size=1 gives the fastest variant that is equal to convolving the image with the following Dilates the source image using the specified structuring element that determines the shape of a pixel neighborhood over which the maximum is taken The function supports the in-place mode. The printed text is clipped by ROI rectangle. It is modified by the function unless CV_FLOODFILL_MASK_ONLY flag is set. Drawing Size Release the managed resources. com/forum. 0 dll. Member name Value Description; DC1394Off-4: Turn the feature off (not controlled manually nor automatically) The Sobel operators combine Gaussian smoothing and differentiation so the result is more or less robust to the noise. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Wrapped class of the C++ standard vector of VectorOfPoint. There Parameters sources Type: Emgu. :: cvSaveImage Method : Saves the image to the specified file. CV nuget package, that contains only the . CV IOutputArray output array of the same size and the same depth as mv[0]; The number of channels will be the total number of channels in the matrix array. Returns the min / max location and values for the image Emgu CV Library Documentation. Currently the following file formats are supported: Windows bitmaps - BMP, DIB; JPEG files - JPEG, JPG, JPE; Portable Network Graphics - PNG; Portable image format - PBM, PGM, PPM; Sun rasters - SR That is, the function processes each element of src as following: dst(I)=lut[src(I)+DELTA] where DELTA=0 if src has depth CV_8U, and DELTA=128 if src has depth CV_8S Mahalanobis Calculates the weighted distance between two vectors and returns it This type is very similar to InputArray except that it is used for output function parameters. Each chapter presents a As a summary, these are the retina model properties: 1. CV IInputArray Structuring element. uwp is the commercial release runtime for UWP. Note, for images whose depth is CV_32F, only libtiff's SGILOG compression scheme is used. CV IInputArray User-defined size1 x size2 cost matrix. CV IInputArray The 8-bit 3-channel image to be segmented mask Type: Emgu. NET compatible languages such as C#, VB, VC++, IronPython etc. AlignMTB Class. Image except that it is being used for GPU processing CudaInvoke: This class wraps the functional calls to the opencv_gpu module Member name Value Description; Unchanged-1: If set, return the loaded image as is (with alpha channel, otherwise it gets cropped). CV IInputArray The first map of either (x,y) points or just x values having the type CV_16SC2 , CV_32FC1 , or CV_32FC2 . Camera Calibration : Shows the use of the camera calibration method within EMGU, . 2015 Emgu Corporation, All Rights Reserved, Release the managed resources. filtering out pixels with too small or too large values. com Converts input image from one color space to another. For example, a call to is equivalent to the following function call in C Both of which create a 400x300 of 8-bit un Content is available under GNU Free Documentation License 1. CV IInputArrayOfArrays Input vector of matrices to be merged; all the matrices in mv must have the same size and the same depth. NET compatible languages such as C#, VB, VC++, IronPython. if the mat is 9x10x11, the array of {9, 10, 11} will be returned. runtime. This class implements the Dense Inverse Search(DIS) optical flow algorithm. com/emgucv/emgucv/issues Disparity map filter based on Weighted Least Squares filter (in form of Fast Global Smoother that is a lot faster than traditional Weighted Least Squares filter implementations) and optional use of left-right-consistency-based confidence to refine the results in half-occlusions and uniform areas. CV IInputArray Source image. The wrapper can be The CvInvoke class provides a way to directly invoke OpenCV function within . CV IInputArray input image; the image can have any number of channels, which are processed independently, but the depth should be CV_8U, CV_16U, CV_16S, CV_32F or CV_64F. ; libcvextern. The size is the same with ROTATE_180, and the rows and cols are switched for ROTATE_90 and ROTATE_270. CV Draws the line segment between pt1 and pt2 points in the image. ; Fixing the issues: The equivalent of cv::Mat. 1 is based on the Open CV 4. Rec 709 with D65 white point) Type: Emgu. kernel Type: Emgu. Click the "Install" button. CV IInputArray Searched template; must be not greater than the source image and the same data type as the image result Type: Emgu. x Windows Phone license and Emgu CV Library Documentation. Version Information . Zero, in the specified array region. Capture() CalibrateCamera() FindChessboardCorners() IntrinsicCameraParameters; ExtrinsicCameraParameters; Stereo Imaging : Shows the use of the camera calibration StereoCalibrate method within EMGU, . There is an GitHub issue tracker for bug reporting, where issues are monitored by our developers. CvEnum DepthType Emgu. GpuMat Class: https://www. Parameters src Type: Emgu. {platform} package that contains the native binary for the specific platforms, on top of the Emgu. OpenCV. Image except that it is being used for GPU processing CudaInvoke: This class wraps the functional Defines a HSV (Hue Satuation Value) color. CV IInputArray Optional information about Defines a Xyz color (CIE XYZ. :: cvThreshold Method : Applies fixed-level thresholding to single-channel array. CV IInputArray The input array dst Type: Emgu. NET compatible A cross platform . CV IInputArray Operation mask, 8-bit single channel array; specifies elements of destination array to be changed dtype (Optional) Type: Emgu. Dispose(bool disposing) executes in two distinct scenarios. In this link you can study the emgu cv api and find all methods description and documentation. CV IInputArrayOfArrays Source arrays. In case of 2D fitting, it should be a vector of 4 elements (like Vec4f) - (vx, vy, x0, y0), where (vx, vy) is a normalized vector collinear to the line and (x0, y0) is a point on the line. CV IOutputArray A map of comparison results; single-channel 32-bit floating-point. The image format is chosen depending on the filename extension, see cvLoadImage. CV IInputArray Input 8-bit 1-channel, 2-channel or 3-channel image. Accumulate Method . encode image and store the result as a byte vector. Allowing OpenCV functions to be called from . CV IInputOutputArray Input 1- or 3-channel, 8-bit or floating-point image. CV IInputArray The input rotation vector Copies selected elements from input array to output array: dst(I)=src(I) if mask(I)!=0. CV_DIST_L1, CV_DIST_L2 , and CV_DIST_C stand for one of the standard metrics. Allows OpenCV functions to be called from . CV IOutputArray Output array of the same size and type and the same number of channels as src. CvEnum DistType Used metric. inliners Type: Emgu. The good thing about Emgu CV is that you can call Open CV methods directly throw the CvInvoke Class. For questions and discussions please visit https://github. Mat Constructor . CV IOutputArray output array of the same type as src. Each method in this class corresponds to a function in OpenCVof the same name. ksize Type: System. CvEnum RotateFlags an enum to specify how to rotate the array Emgu CV Library Documentation. It will contain pointer to the first most outer contour or IntPtr. OpenTimeoutMsec 53 For questions and discussions please visit http://www. In all methods to match, the method train() is run every time before matching. An CudaImage is very similar to the Emgu. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Erodes the source image using the specified structuring element that determines the shape of a pixel neighborhood over which the minimum is taken: dst=erode(src,element): dst(x,y)=min((x',y') in element)) src(x+x',y+y') The function supports the in-place m Draws a simple or filled circle with given center and radius. Util VectorOfMat Source images, one for each modality. cuda. com Performs matrix transformation of every element of array src and stores the results in dst Both source and destination arrays should have the same depth and the same size or selected ROI size. 2015 Emgu Corporation, All Rights Reserved, Note, for images whose depth is CV_32F, only libtiff's SGILOG compression scheme is used. Cuda. After conversion into Grayscal we have to apply Gaussian Blur so we smooth the image and remove any noise that would make the edge detection worse. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Type: Emgu. Currently the following file formats are supported: Windows bitmaps - BMP, DIB; JPEG files - JPEG, JPG, JPE; Portable Network Graphics - PNG; Portable image format - PBM, PGM, PPM; Sun rasters - SR, RAS; TIFF files - TIFF, TIF; OpenEXR HDR images - EXR; JPEG 2000 images - jp2. It applies a spectral whithening (mid-frequency details enhancement); 2. Only 8-bit single-channel or 3-channel (with 'BGR' channel order) images can be saved using this function. CV IInputArrayOfArrays Rotation part extracted from the homogeneous matrix that transforms a point expressed in the gripper frame to the robot base frame. CV IInputArray The first source array src2 Type: Emgu. GpuMat Constructor . Get an array of the size of the dimensions. Allows Open CV functions to be called from . CV Namespace: https://www. Defines a Xyz color (CIE XYZ. emgu. tGripper2base Type: Emgu. The extremums are searched over the whole array, selected ROI (in case of IplImage) or, if mask is not IntPtr. com/emgucv/emgucv/issues Get an array of the size of the dimensions. AlgorithmExtensions Class. CV IInputArray The input 8-bit 1-channel or 3-channel image mask Type: Emgu. projection of the same 3D point) in the other image. Structure MCvScalar Color of the contours thickness (Optional) Type: System Int32 Thickness of lines the contours are drawn with. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Resizes the image src down to or up to the specified size Emgu CV Library Documentation. Rec 709 with D65 white point) Finds minimum and maximum element values and their positions. rotateCode Type: Emgu. CV IOutputArray Parameters mv Type: Emgu. The id of each diamond is in fact of type Vec4i, so each diamond has 4 ids, which are the ids of the aruco markers composing the diamond. so was missing. The pointer firstContour is filled by the function. The smallest of threshold1 and threshold2 is used for edge linking, the largest - to find initial segments of strong edges. CV IOutputArray Destination image. transmat and shiftvec should be real floating-point matrices. CV IOutputArray Destination image map1 Type: Emgu. SmoothGaussian(int kernelWidth, int kernelHeight, double sigma1, double sigma2) Emgu. override ride this function if you need to call the Dispose() function on any managed IDisposable object created by the current object Color Conversion code. The OpenCL context created with Video Acceleration context attached it (if not attached yet) for optimized GPU data copy between cv::UMat and HW accelerated encoder. Zero if no contours is detected (if the image is completely black). dldt is the commercial release runtime with CUDA support. Image except that it is being used for GPU processing CudaInvoke: This class wraps the functional Emgu CV Library Documentation: CvInvoke. Namespaces. In general, only 8-bit single-channel or 3-channel (with 'BGR' channel order) images can be saved using this function, with these exceptions: 16-bit unsigned(CV_16U) images can be saved in the case of PNG, JPEG 2000, and TIFF formats 32-bit float (CV_32F) images can be saved in PFM, TIFF, OpenEXR, and Radiance HDR formats; 3-channel(CV_32FC3) TIFF images will be Loads an image from the specified file and returns the pointer to the loaded image. Member name Value Description; Bgr2Bgra: 0: Convert BGR color to BGRA color Rgb2Rgba That is, the function processes each element of src as following: dst(I)=lut[src(I)+DELTA] where DELTA=0 if src has depth CV_8U, and DELTA=128 if src has depth CV_8S Mahalanobis Calculates the weighted distance between two vectors and returns it Emgu CV Library Documentation. jaudz lxhte dlotiv brbk gucu zwpc nggyifc auykujt rubdkr xqpeur