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2018-09-19 22:37:35 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

remove the last dot in the link.

2018-09-19 02:03:52 -0500 commented question How to find rectangle edges from image and crop image from it's edges?

You can be using the addWeigh method to draw result image RGB Image.

2018-09-19 01:54:29 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

You can be using this example from OpenCV example. https://github.com/opencv/opencv/tree/master/samples/android/face-det

2018-09-19 00:07:03 -0500 commented question Measure the actual size of the object?

Have not measured_distance value? How to auto measure it.

2018-09-19 00:02:56 -0500 commented question I cannot find openCv for the samsung S8, S9 or other Samsungs

You can install OpenCV Manager APK directly from APK folder in the OpenCV Source that you have downloaded.

2018-09-18 04:31:53 -0500 answered a question Calculate the distance between two objects (example cars) in a video

You must calibration camera(find extrinsic and intrinsic camera matrix, Use can using cheeboard or Calibrated Cameras in

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2018-09-12 03:25:51 -0500 commented question How to use camera parameters to calculate world distance in cm between pixels?

@earcz certainly

2018-09-11 11:08:03 -0500 commented question How to use camera parameters to calculate world distance in cm between pixels?

@earcz This is also a problem that I am also looking for a solution. If you have a solution, please show me.

2018-09-11 04:04:16 -0500 commented question Measure the actual size of the object?

How to measure distance(measured distance) auto? You can explant me how to? the AR how to do that?

2018-09-11 03:47:17 -0500 commented answer How to spot parking space lines?

@Michal The line of the spot parking on your image is too blurry. I think it is difficult to do this.

2018-09-11 03:30:51 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

@Akhil Patel. I have the reference for you above comments. https://github.com/opencv/opencv/tree/master/samples/androi

2018-09-08 03:48:37 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

You can see more here. If you have any problem, touch in with me, I will help you.

2018-09-08 03:47:11 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

You can see more here. If you have any problem, contact with me, I will help you.

2018-09-07 10:49:55 -0500 answered a question How to spot parking space lines?

The first you can Canny And HoughLinesP Canny(...); Convert gray to rgb cvtColor(.. CV_GRAY2BGR); perform HoughLin

2018-09-07 08:47:05 -0500 commented question Measure the actual size of the object?

Thank you so much. This wiki I have read it. The same as this http://ksimek.github.io/2013/08/13/intrinsic/

2018-09-07 08:40:44 -0500 commented answer Measure the actual size of the object?

How to measuring like AR? Do you have any ideas?

2018-09-07 08:34:50 -0500 commented question Measure the actual size of the object?

you have any ideas?

2018-09-07 08:30:14 -0500 commented answer Open CV on Java, Mask after findHomography()

This question very old.

2018-09-07 08:23:34 -0500 edited question Measure the actual size of the object?

Measure the actual size of the object? Hi guys, If I have the extrinsic and intrinsic matrix of the camera. Can I measur

2018-09-07 06:35:49 -0500 edited answer Measure the actual size of the object?

Can't I do that with below? The AR how to do that?

2018-09-07 06:35:02 -0500 answered a question Measure the actual size of the object?

I can't do that with: The AR how to do that?

2018-09-07 05:58:06 -0500 edited question Measure the actual size of the object?

Measure the actual size object? Hi guys, If I have the extrinsic and intrinsic matrix of the camera. Can I measure the a

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2018-09-07 05:56:04 -0500 edited question Measure the actual size of the object?

Measure the actual size object? Hi guys, If I have the extrinsic and intrinsic matrix of the camera. Can I measure the a

2018-09-07 05:55:09 -0500 asked a question Measure the actual size of the object?

Measure the actual size object? Hi guys, If I have the extrinsic and intrinsic matrix of the camera. Can I measure the a

2018-09-07 05:40:38 -0500 commented answer Filtering binarizing text base image for edge and contour detection on low contrast dark images

I think, before do Canny, you should adjust brightness and contrast value. You can do this by way: Changing the contra

2018-09-07 05:28:31 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

You should be moving findRectangle and angle method into JNI.

2018-09-07 05:28:04 -0500 commented question speeding up camera preview in android opencv using CameraBridgeViewBase class and JavaCameraView?

You should be moving findRectangle and angle into JNI.

2018-09-04 11:49:04 -0500 commented question Real Time Image Processing in Android Studio

This error has happened when JNI have not including OpenCV lib.

2018-09-04 05:46:11 -0500 edited answer Filtering binarizing text base image for edge and contour detection on low contrast dark images

You should using Canny detect edges, this is simple. https://docs.opencv.org/3.4.3/d6/d56/samples_2cpp_2edge_8cpp-exampl

2018-09-04 05:45:37 -0500 edited answer Filtering binarizing text base image for edge and contour detection on low contrast dark images

You should using Canny detect edges, this is simple. https://docs.opencv.org/3.4.3/d6/d56/samples_2cpp_2edge_8cpp-exampl

2018-09-04 05:42:10 -0500 edited answer Filtering binarizing text base image for edge and contour detection on low contrast dark images

You should using Canny detect edges, this is simple. https://docs.opencv.org/3.4.3/d6/d56/samples_2cpp_2edge_8cpp-exampl

2018-09-04 05:28:51 -0500 answered a question Filtering binarizing text base image for edge and contour detection on low contrast dark images

You should using Canny detect edges, this is simple. https://docs.opencv.org/3.4.3/d6/d56/samples_2cpp_2edge_8cpp-exampl

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2018-09-03 06:26:55 -0500 marked best answer How to draw line?

Hi guys, Have anyone could help me resolve this issue, or have any idea.

After applying a series of algorithms, I have the following result. screenshot from 2018-08-29 13-25-38 copy

How to draw line look like bellow. screenshot from 2018-08-29 13-25-38

I have to apply HoughLineP but not good. wwww

Code ``` pyrMeanShiftFiltering( img, res, spatialRad, colorRad, maxPyrLevel );

//imshow( "ShiftFiltering", res );

cvtColor(res, res, COLOR_RGBA2GRAY);

GaussianBlur(res, res, Size(15, 15), 0);

//imshow( "GaussianBlur", res );
adaptiveThreshold(res, res, 255, ADAPTIVE_THRESH_GAUSSIAN_C, THRESH_BINARY_INV, 11, 1);
//imshow( "adaptiveThreshold", res );

Mat element = getStructuringElement (MORPH_RECT, Size(3, 3));
morphologyEx(res, res, MORPH_CLOSE, element);

Mat edgs;
Canny(res, edgs, 750, 800, 3);
vector<Vec4f> lines3;
HoughLinesP(edgs, lines3, 1, CV_PI / 180, 20, 15, 10);

Mat markEdges = Mat(res.size(), CV_8UC3);
for (size_t i = 0; i < lines3.size(); i++)
{
    Vec4f l = lines3[i];
    double dest = euclideanDist(Point2f(l[0], l[1]), Point2f(l[2], l[3]));
    if (dest > 10) {
        line(markEdges, Point2f(l[0], l[1]), Point2f(l[2], l[3]), Scalar(0, 0, 255), 2, LINE_AA);
    }
}

imshow("markEdges", markEdges);

``` I have applied segment image (watershed) but not good. qqqq

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2018-09-03 06:01:28 -0500 answered a question How to draw line?

@sturkmen I have solved this issue following. The first I have using FastLineDetector/LineSegmentDetector Above two cl

2018-09-02 23:59:42 -0500 commented question Error from STL library while compiling for Android with APP_STD=c++_static(shared)

I have solved this issue by way: In Application.mk config like bellow. APP_STL := gnustl_static ... APP_CPPFLAGS := -st

2018-09-02 22:56:41 -0500 answered a question How do I support c++11 in Opencv 3 Android NDK

I have the same error. Has anyone solved this error?

2018-09-02 21:35:09 -0500 edited question Error from STL library while compiling for Android with APP_STD=c++_static(shared)

Error from STL library while compiling for Android with APP_STD=c++_static(shared) Hi guys, How to fix bellow error. W

2018-09-02 21:32:16 -0500 edited question Error from STL library while compiling for Android with APP_STD=c++_static(shared)

Error from STL library while compiling for Android with APP_STD=c++_static(shared) Hi guys, How to fix bellow error. W

2018-09-02 21:31:46 -0500 edited question Error from STL library while compiling for Android with APP_STD=c++_static(shared)

Error from STL library while compiling for Android with ANDROID_STL=c++_static(shared) Hi guys, How to fix bellow error.

2018-09-02 21:30:57 -0500 asked a question Error from STL library while compiling for Android with APP_STD=c++_static(shared)

Error from STL library while compiling for Android with ANDROID_STL=c++_static(shared) Hi guys, How to fix bellow error.

2018-09-02 20:58:35 -0500 commented question How to draw line?

Thank you @sturkmen. I have used it. Is very good.

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