sturkmen's profile - activity

deletion of useless posts according to previous discussion some questions already deleted and there are many question li

you can also take a look at http://blog.dlib.net/2014/02/dlib-186-released-make-your-own-object.html do you have a data

if you share your code maybe we can help to improve

yes this will download the latest of 3.4

How to Clone a Specific Branch? git clone --branch 3.4 https://github.com/opencv/opencv.git

git clone --branch 3.4 https://github.com/opencv/opencv.git

no need to close questions having accepted answer. better is upvoting the question and the answer.

@snavas see the update on berak's answer.

yes, there were changes, have a look at the resp. pr: https://github.com/opencv/opencv/pull/16594/files#diff-bd12a887ea

see https://answers.opencv.org/question/5151

can you share the code you used so we can try to reproduce the problem.

if you have a real image and a code you used so far please share it so we can try to suggest some solution

if you have a real image please share it so we can try some solution

you already found the best answer

all steps are well explained. be sure you applied all the steps. especially use OpenCV 4.5

all steps are well explained. be sure you applied all the steps.

see https://github.com/VlSomers/native-opencv-android-template

ret, frame = cap.read() You should check if frame is not None: because cv2 doesn't raise error when it can't get frame

You should check if img is not None: because cv2 doesn't raise error when it can't get frame from camera or read image f

see https://docs.opencv.org/2.4/modules/core/doc/operations_on_arrays.html?highlight=divide#void%20divide(double%20scale

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

build_sdk.py tool "#error "C++11 is not supported" I am trying to compile opencv4android with opencv's extra modules, bu

see https://www.learnopencv.com/video-stabilization-using-point-feature-matching-in-opencv/

an old question but i recently tried something like #include "opencv2/videoio.hpp" #include "opencv2/video.hpp" #includ

i have two web cams ( Laptop's cam and an USB webcam )

i tried to capture from two cams at the same time with the code below.

it is working but one of the cams is lagging.

when i make two exe file ( one exe capturing from cam 0 other from cam 1 ) and run two exe at the same time, both cam streaming without lagging.

any advice to this problem ?

EDIT: i edited the code according to @pklab 's comment.

yes! i get better result with this modification.

but still not good as two running exe :(

Note:

running on Windows 10

Video I/O: DirectShow

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace cv;
using namespace std;

int main(int argc, const char * argv[])
{
    VideoCapture cap0(0);
    VideoCapture cap1(1);

    cap0.set(CV_CAP_PROP_FPS, 15);
    cap1.set(CV_CAP_PROP_FPS, 15);

    Mat frame0, frame1;

    for (;;)
    {

        if (!(cap0.grab() && cap0.grab())) {
            std::cerr << "Unable to grab from one or both cameras";
            break;
        }

        cap0.retrieve(frame0);
        cap1.retrieve(frame1);

        if (!frame0.empty())
        {
            imshow("cap0", frame0);
        }

        if (!frame1.empty())
        {
            imshow("cap1", frame1);
        }

        int key = waitKey(10);
        if (key == 27)
            break;
    }
}

deletion of useless posts according to previous discussion some questions already deleted and there are many question li

merged several questions

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

http://docs.opencv.org/3.1.0/df/d9d/tutorial_py_colorspaces.html#gsc.tab=0 This link helped me to find the solution F

Difference between thresholding function Hi Guys I have two set of codes for thresholding Code 1 import cv2 impo

i tried something like this import cv2 import numpy as np Image = np.zeros((20000,20000), np.uint8) Threshold = np.z