Questions - OpenCV Q&A Forum

318

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1

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no

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2017-10-13 21:04:53 -0600 Tetragramm

What does this specific matrix constructor does?

matrix

1k

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1

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no

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2017-10-19 20:52:40 -0600 Tetragramm

Matrix exponential

2k

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1

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1

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2017-12-06 14:47:08 -0600 sjhalayka

OpenGL 4x4 camera matrix, OpenCV ?x? camera matrix

5k

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1

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no

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2017-12-08 05:08:36 -0600 kbarni

Do I need an OpenCV function to read cursor position?

21k

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1

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no

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2018-02-28 02:41:22 -0600 berak

In Python, is there a method or operator to determine if a frame is empty or an all zero-matrix?

614

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1

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no

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2018-03-04 12:15:34 -0600 berak

Best way to apply a function to each element of Mat (Android)

806

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1

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no

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2018-04-15 12:07:33 -0600 LBerger

Row and Col problem when Mat represents 3d point cloud

7k

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1

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no

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2018-04-29 15:25:41 -0600 bennog

How do I properly add two Matrices?

2k

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1

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no

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2018-09-18 05:03:55 -0600 hayley

How to extract RANSAC's inlier object points from the matrix produced by solvePNPRansac() or findHomography()?

508

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1

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1

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2018-11-20 17:23:11 -0600 nick_leo

Finding largest rectangles in matrix

1k

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1

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no

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2018-11-24 09:44:18 -0600 berak

How to flatten 2D matrix and then copy it to a specific column in another matrix

5k

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1

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no

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2019-01-17 04:01:07 -0600 berak

error: no matching member function for call to 'at'

1k

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1

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1

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2020-12-03 07:02:10 -0600 fadeto404

Pixel-wise matrix multiplication

5k

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2

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2

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2012-07-30 09:30:42 -0600 sammy

multiply two points and matrix

3k

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2

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1

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2014-03-05 04:42:54 -0600 tuannhtn

missing cv::Mat::zeros(int ndims, const int* sz, int type)

7k

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2

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1

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2013-01-26 04:55:06 -0600 AlexanderShishkov

copy selected row of a matrix to another

12k

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2

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2

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2013-04-08 12:54:31 -0600 Guanta

Product of two matrices

3k

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2

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1

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2013-05-15 09:14:07 -0600 Guanta

Matrix multiplication

1k

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2

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no

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2018-07-24 20:49:42 -0600 mannyglover

Convert pixel position to world direction?

2k

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2

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no

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2015-08-15 14:05:13 -0600 LBerger

complement 16 bit mat and then convert it to 8 bit

18k

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2

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4

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2015-10-24 14:14:03 -0600 theodore

is there any efficient/fast/best way to remove/delete a given row/col from a cv::Mat?

8k

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2

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no

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2020-02-20 00:12:25 -0600 syvlvester

Understanding the camera matrix

744

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2

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no

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2020-10-07 14:36:18 -0600 superfly

how do I add missing module cv::drawFrameAxes without breaking installation

4k

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3

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no

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2013-07-31 03:42:24 -0600 Alexander Smorkalov

NEWBIE calibrateCamera and calibrationMatrixValues

6k

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3

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1

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2015-02-19 16:16:38 -0600 TrustMeImAnEngineer

Sine or Cosine of every element in Mat (c++)

2k

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3

answers

1

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2020-01-09 02:32:30 -0600 LBerger

convert cv::Mat to vector<vector<uchar>> img;

matrix

146 questions

What does this specific matrix constructor does?

Matrix exponential

OpenGL 4x4 camera matrix, OpenCV ?x? camera matrix

Do I need an OpenCV function to read cursor position?

In Python, is there a method or operator to determine if a frame is empty or an all zero-matrix?

Best way to apply a function to each element of Mat (Android)

Row and Col problem when Mat represents 3d point cloud

How do I properly add two Matrices?

How to extract RANSAC's inlier object points from the matrix produced by solvePNPRansac() or findHomography()?

Finding largest rectangles in matrix

How to flatten 2D matrix and then copy it to a specific column in another matrix

error: no matching member function for call to 'at'

Pixel-wise matrix multiplication

multiply two points and matrix

missing cv::Mat::zeros(int ndims, const int* sz, int type)

copy selected row of a matrix to another

Product of two matrices

Matrix multiplication

Convert pixel position to world direction?

complement 16 bit mat and then convert it to 8 bit

is there any efficient/fast/best way to remove/delete a given row/col from a cv::Mat?

Understanding the camera matrix

how do I add missing module cv::drawFrameAxes without breaking installation

NEWBIE calibrateCamera and calibrationMatrixValues

Sine or Cosine of every element in Mat (c++)

convert cv::Mat to vector<vector<uchar>> img;

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