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2019-01-19 12:03:34 -0500 commented answer is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix

Thank you for valuable comment I was wondering how would a small error in measurement of Z would distort the X and Y va

2019-01-19 11:56:50 -0500 commented answer is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix

Thank you for valuable comment I was wondering how would a small error in measurement of Z would distort the X and Y va

2019-01-19 11:49:29 -0500 received badge  Supporter (source)
2019-01-19 11:49:24 -0500 marked best answer is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix

I have read camera calibration explained.

I was able to do it with and just to test it i used this and everything is perfectly working.

I am just curious given the below equation and assuming I know the Z of a 3D point and its x,y pixel coordinates in the image, would I be able to assess the X, and Y coordinates of the 3D point?

In other words if I multiple the two sides of the equation by inv of camera matrix, and assuming I know the Z = w of a 3D point, then can I get the 3D X and Y of the point in 3D space?

![image description] (https://docs.opencv.org/2.4/_images/m...)

Any comments is much appreciate it.C:\fakepath\Selection_007.png

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2019-01-19 02:51:40 -0500 asked a question cv::undistortPoints not working for me ....

cv::undistortPoints not working for me .... I am trying to un-distort the pixel coordinate of two points using the code

2019-01-19 02:19:00 -0500 edited question is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix

is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix I have read camera calibration ex

2019-01-19 02:15:12 -0500 asked a question is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix

is it possible to calculate a points 3D X and Y coordinate by inverting camera matrix I have read camera calibration ex

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2019-01-17 03:54:26 -0500 edited question error: no matching member function for call to 'at'

error: no matching member function for call to 'at' I have this ridiculously simple example ... but It doesn't compile .

2019-01-17 03:53:58 -0500 asked a question error: no matching member function for call to 'at'

error: no matching member function for call to 'at' I have this ridiculously simple example ... but It doesn't compile .

2019-01-17 03:53:57 -0500 asked a question error: no matching member function for call to 'at'

error: no matching member function for call to 'at' I have this ridiculously simple example ... but It doesn't compile .

2019-01-16 17:08:19 -0500 asked a question Camera pose estimation c++ code

Camera pose estimation c++ code I have come across this example for camera pose estimation. I am wondering where I can

2019-01-15 17:00:31 -0500 commented question [Opencv4] Settings.write not working Incorrect element name {; should start with a letter or '_' in function 'operator<<'

I just resolved by commenting line 27 and 47. here

2019-01-15 16:47:59 -0500 asked a question [Opencv4] Settings.write not working Incorrect element name {; should start with a letter or '_' in function 'operator<<'

[Opencv4] Settings.write not working Incorrect element name {; should start with a letter or '_' in function 'operator&

2019-01-15 13:34:12 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

@ can you please let me know where in the .pro file I should add the the two lines you mentioned? at the top ? in the mi

2019-01-15 13:29:43 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

@berak thanks for the comments ... let say I want to add more libraries to my build (eg. java bindings etc) how can I in

2019-01-15 06:56:45 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

sorry my bad I had to restart the QT

2019-01-15 06:39:45 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

ok thanks but my includes getting ugly like : #include <opencv4/opencv2/opencv.hpp> Is it ok??

2019-01-15 06:39:23 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

ok thanks but my includes getting ugly like : #include <opencv4\ opencv2\="" opencv.hpp=""> Is it ok??

2019-01-15 06:39:11 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

ok thanks but my includes getting ugly like : #include <opencv4 opencv2="" opencv.hpp=""> Is it ok??

2019-01-15 06:38:40 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

ok thanks but my includes getting ugly like : #include <opencv4 opencv2="" opencv.hpp=""> Is it ok??

2019-01-15 06:22:24 -0500 commented answer [Ubuntu 18.04] how add opencv built from source to QT applications

thanks but can't I just use the source and build folders for include and libraries respectively?

2019-01-15 04:56:15 -0500 edited question [Ubuntu 18.04] how add opencv built from source to QT applications

[Ubuntu 18.04] how add opencv built from source to QT applications I have built opencv 4 from source and I would like to

2019-01-15 04:55:41 -0500 asked a question [Ubuntu 18.04] how add opencv built from source to QT applications

[Ubuntu 18.04] how add opencv built from source to QT applications I have built opencv 4 from source and I would like to

2019-01-13 05:42:21 -0500 commented question cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

Thanks for the quick response ... I guess I need some more details on how to repeat these steps. Regards

2019-01-13 03:33:01 -0500 edited question cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’? Dear All,

2019-01-13 00:32:50 -0500 asked a question cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’? Dear All,

2019-01-13 00:29:12 -0500 received badge  Editor (source)
2019-01-13 00:29:12 -0500 edited question [Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

[Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’;

2019-01-12 13:00:33 -0500 asked a question [Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

[Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’;

2019-01-12 13:00:31 -0500 asked a question [Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’; did you mean ‘-mtbm’?

[Ubuntu 18.04 Opencv 4.0 and 3.4] cross-compile opencv for arm : c++: error: unrecognized command line option ‘-mthumb’;