Separate Color regions using Open CV
I have a set of vector images of same object: **Outline Image 1** [![Outline Image 1][1]][1] **Outline Image 2** [![Outline Image 2][2]][2] **Fill Image** [![Fill Image][3]][3] **What I want to do**...
View ArticleOpenCV and C++: change the color of some object in the image
I'm new to OpenCV and I'm trying to do some simple operations with an image. I have this [image](https://imgur.com/j7mtwYC). First of all, when the left button is clicked I have to compute the mean...
View Articlehow to modify video using pixel array or shader?
Crossposted from this link https://python-forum.io/Thread-How-to-modify-video-using-pixel-array-or-shader Hello guys I am trying to apply some effects to my video.. what I need is to apply some effects...
View ArticleResizing an image and applying a Gaussian blur
Hello, This seems a bit trivial, but I'm not sure as to why execution isn't working how I'm expecting it to. I want to resize an image and then apply the Gaussian blur to that image, but only one is...
View Articlea Line pixel comparison beetwen 2 frames of the same video
Hi everybody, I tried to found something in other topics, but i saw nothing dealing with my problems. I try to compare a horizontal line between different frames of the same video, for example a frame...
View ArticleDraw onto CV image with OpenGL commands?
I would like to draw some simple augmented reality style 3d graphics over a video which is being read and processed in real time with OpenCV (from a robot camera). I've tried a couple of options but...
View Articleis it possible to show two video feed in one window?
camera1 = cv2.VideoCapture(0) camera2 = cv2.VideoCapture(1) here i fetch the video from two camera how can i show this video in one window? using "imshow" function to print only one video at the time...
View ArticleDeleting opencv github repo after successful building from source
Is it save to delete the whole opencv github repo including the build dir after cloning and building it successfully to free the disk space? Or are there dependencies to the github repo after the...
View Articlec++ opencv error
When this cord [ here](https://docs.opencv.org/master/db/d28/tutorial_cascade_classifier.html) run in visual studio 2015 an error happen as follow, program:C:\WINDOWS\SYSTEM32\MSVCP140D.dll...
View ArticleOpenCV object detection run error
- OpenCV => 3.4 - Operating System - Ubuntu 16.04 - Python - 3.5 Following the instructions given in "[TensorFlow Object Detection...
View ArticleThe type list is not generic; it cannot be parameterized with arguments
I am following samples that use the line … List contours = new ArrayList(); Example … Mat notused; Imgproc.findContours(dilateImg,contours,notused,Imgproc.RETR_LIST,Imgproc.CHAIN_APPROX_SIMPLE);...
View ArticleThe following cord snippet will capture and save images using opencv but...
#include "opencv2/objdetect/objdetect.hpp" #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include #include using namespace std; using namespace cv; void...
View ArticleHow to preprocess face before training?
I am using haarcascade classifier for detecting faces and training them which will be used for recognition later. How to preprocess the images like smoothing, denoising etc before training. Kindly...
View ArticleThe method putText(Mat, String, Point, int, int, Scaler) is undefined for the...
Eclipse IDE for JAVA Developers: Version: Oxygen.3 Release (4.7.3) JRE System Library [JavaSE-1.7] OpenCV 3.4.0 I have read about the above software and have those versions. I have run the sample...
View ArticleHow to compare a captured image with existing image in using openCV with C++?
How to get a success value if the original photo is match to 6 images in another folder after comparing them.
View ArticleOpenCV3.4.1 build erron issue on Ubuntu 16.04 LTS
Hello everyone, I'm trying to install OpenCV 3.4.1 on my Ubuntu 16.04 lts following the steps described in [Ubuntu 16.04: How to install...
View ArticleOpenCV 3.4 Assertion failed (checkDetectorSize()) in setSVMDetector
I'm trying to train SVM with my own images and feed that to the HOGDescriptor in OpenCV. I find a similar question...
View ArticleHow to replace detected contours with an image?
hi! in my android project i detected the colours with threshold. after that i can find contours and draw rectangle instead of detected points. But I want to put an image where the rectangle exists. I...
View ArticleSwap black and white
Hello, I'm using Canny edge detection in a c++ opencv project and the output is in black and white (the lines of the detected objects are in white and the background is black) I would like to know if...
View Articleopencv object detection tutorial not working
So I have followed the object detection tutorial to a "T" and it doesn't work. Just to double check for any spelling or syntax errors, I copied and pasted the website's code into my project and...
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