Where i can find updated opencv_core.js and opencv_imgproc.js?
Hi I'm working on some OpenCV.js based project and I'm new to this, my project requires cv.minEnclosingCircle and cv.threshold which both functions missing from OpenCV.js, I come to know both are from...
View Articledifferents results using caffe demo and opencv
Hi, Model is http://dl.caffe.berkeleyvision.org/bvlc_googlenet.caffemodel. When I use opencv dnn my results are : 0.9998 space shuttle 0.0001 airliner 0.0 bullet train, bullet using...
View Articlemake fail with opencv_core_pch_dephelp
With: CentOS release 5.4 gcc version 4.1.2 20080704 Here is my make command: cmake3 -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_C_EXAMPLES=ON \ -D...
View ArticleAndroid CameraBridgeViewBase - deliverAndDrawFrame insights
Hi all, I have a question regarding the `protected void deliverAndDrawFrame(CvCameraViewFrame frame)` method available in `CameraBridgeViewBase`. I've tried to use it in the way exemplified by...
View ArticleIs it possible to detect the measurements of body parts in a normal camera...
Hi all, I am going to make an application where user's hand needs to be measured in a normal camera just like any android or iOS phone, and if it is possible how much accurate will that be? Thanks
View ArticleOpenCV: Convert Compressed video to frames Java
I can convert video to frames using openCV. But i have another .avi format video which is compressed but i cannot read the video. Video Info: FileExtension:"avi", Format:"Microsoft RLE", CodecID:...
View ArticleapplyTransformation not working in python?
Trying to work with the Thin Plate Spline warping in python. The actual warping works just fine: tps = cv2.createThinPlateSplineShapeTransformer() pts1 = [(10, 10), (100, 100), (50, 100), (200, 30),...
View ArticlePaypal always gives an error
Hi all, 1. Go to https://opencv.org/ 2. Click "Donate" 3. There is always an error: "Your session is invalid or expired."
View Articlecalculate Z from two images possible?
Hi, im trying to calculate the depth of a pixel from two given images. My idea: - calibrate the camera (calculate instrinsic camera parameters) - find feature points with sift or surf in both images -...
View ArticleStereo SGBM Algorithm
Hello everyone, I have been working on a project in which I need to compute a depth map. In order to do so, I have used both Stereo BM and Stereo SGBM algorithms after computing a stereo calibration....
View ArticleDoes the camera calibration take into consideration other type of x,y...
So instead of using the following: Xcorrected=x(1+k1*r^2+k2*r^4+k3*r^6) Ycorrected=y(1+k1*r^2+k2*r^4+k3*r^6) I want to use:...
View Articleperformance of videoCapture with gst pipeline
Hi, i have 2 files "t1.ts" & "t1_small.ts". t1_small.ts is a 1fps version of the t1.ts (which is 8fps) and generated by gst pipeline: gst-launch-1.0 -v filesrc location="t1.ts" ! decodebin !...
View ArticleOpenCV VideoCapture in Win10 VS17 cannot open more than four USB 3.0 cameras
I am trying set up a multi-camera system in VS17 win10 OpenCV environment using VideoCapture function from OpenCV library. Cameras are Basler USB 3.0 (3840*2748 monochrome). I had no issue to open and...
View ArticleC API problem on OpenCV 3.4.6.
I try to use cvGetSize function, but exception error occurred. Unhandled exception at 0x00007FFA9563A388 in TestOpenCV2015.exe: Microsoft C++ exception: cv::Exception at memory location...
View ArticleWhat are the best practices to measure the length of an arbitrary worm?
The worm could be coiled, curved, straight. 
View ArticleGet foreground mask without updating model
I want to write an algorithm that detects camera tampering e.g blocking the view with piece of paper etc, so I thought about measuring the differences between current and background frame. I need to...
View ArticleGet the coordinates of a found object using a template.
So this is my code: import cv2 import numpy as np import pyautogui img_bgr = cv2.imread('gra.png') img_gray = cv2.cvtColor(img_bgr, cv2.COLOR_BGR2GRAY) template = cv2.imread('bones2.png', 0) w, h =...
View ArticlePerform tracking on screenshot
I want to be able to take an opencv screenshot image, and apply image tracking to it. But I get this error: AttributeError: 'numpy.ndarray' object has no attribute 'read' I use win32api to take a...
View ArticleBuildBot artifacts
Hi all, Is there a way to download the generated artifacts from `BuildBot`? In other words, how to get the binaries for each system, for each PR or `master` at least. Thanks,
View ArticleSetting System Environment variables(OpenCV4.1.0 in VisualStudio2015)
I installed OpenCV for the first time. I am setting a new path for the environment variable on Windows10. When using OpenCV 4.1.0 in Visual Studio 2015, which should I use VC14 or VC15 in...
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