Questions - OpenCV Q&A Forum

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2019-11-13 12:28:47 -0600 trolstover

libopencv_core.so.4.1 not found?

c++#opencv

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2019-12-20 14:42:35 -0600 supra56

projectPoints shows wierd results

c++#opencv

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2019-12-24 07:27:20 -0600 Dimitar TB

How do I create a 3D map of keypoints from a single camera?

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2015-04-07 05:56:47 -0600 theodore

measuring height of color using pixel. [closed]

c++#opencv

616

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2015-04-09 16:27:09 -0600 sturkmen

how to get bounding rectangle on both window??

c++#opencv

198

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2015-06-01 07:32:28 -0600 thdrksdfthmn

why I am not getting Image??

c++#opencv

290

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2015-06-07 01:04:00 -0600 sh

convertTo performance in Android native code

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2015-07-15 15:20:36 -0600 LBerger

Put decoded base64 data into cv::Mat variable

c++#opencv

304

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2015-11-13 04:31:23 -0600 sturkmen

Projects on open.

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2015-11-30 10:06:39 -0600 LorenaGdL

how to convert image in rectangle into gray??

c++#opencv

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2016-01-15 03:34:56 -0600 StevenPuttemans

I am a new in programming and opencv as well, I would like to learn it in a perfect way possible. how can I read a video from a file? is there any requirement to do so?

c++#opencv

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2016-02-10 10:46:06 -0600 berak

Numpy Arrays

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2016-04-14 20:39:24 -0600 Tetragramm

How can I compare an ideal projection with a real projection?

c++#opencv

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2016-05-27 01:04:14 -0600 kevgeo

HOG:How much to resize image when calculating HOG features?

c++#opencv

222

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2016-06-09 08:41:31 -0600 kbarni

Scene Reconstruction

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2016-06-11 05:27:20 -0600 berak

Calculate affine transformation matrix

c++#opencv

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2016-06-13 06:26:44 -0600 kevgeo

Finding Rank of Kernel

81

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2016-06-29 21:06:47 -0600 berak

I have problem with changing array data to matrix.

c++#opencv

63

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2016-07-01 03:18:53 -0600 berak

Unexpected behavior of the program

c++#opencv

532

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2016-07-23 03:04:15 -0600 berak

why composeRT function is showing error for column vectors?

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2016-07-27 00:35:22 -0600 berak

findChessboardCorners returing false boolean value?

4k

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2016-08-22 02:51:38 -0600 FooBar

identifier 'imshow' and 'waitkey' is undefined

c++#opencv

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2016-10-21 04:30:21 -0600 kbarni

How to read 10 bit tiff satellite image in opencv?

c++#opencv

710

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2016-11-01 10:34:02 -0600 berak

I am trying to recognize facial emotion using SVM, however every time I run the program I get an error stating "assertion failed (samples.cols== var_count && samples.type == CV_32F) in cv::ml::SVMImpl::predict in file....... line 1919"

c++#opencv

90

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2016-11-11 07:54:43 -0600 berak

I am working on recognition of faces in given videos with provided Data base.I am using createFisherFaceRecognizer() . But I am not getting Proper output. is it problem with Data base or the predict method, which i have used.

4k

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2016-12-26 07:46:21 -0600 berak

Default color space for frames in video

c++#opencv

69

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1

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2017-01-21 02:39:07 -0600 berak

How to retrieve the matched lines from the BinaryDescriptorMatcher

c++#opencv

380

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2017-01-25 09:30:18 -0600 LBerger

Problem with call of function bm3dDenoising() and xphoto ...

279

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1

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2017-01-28 06:33:38 -0600 agatte

How to compile opencv project in cmake [closed]

494

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1

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2017-02-13 01:56:51 -0600 LBerger

How to get the total number of black pixels in the connected component to which a pixel is attached?

c++#opencv

77 questions

libopencv_core.so.4.1 not found?

projectPoints shows wierd results

How do I create a 3D map of keypoints from a single camera?

measuring height of color using pixel. [closed]

how to get bounding rectangle on both window??

why I am not getting Image??

convertTo performance in Android native code

Put decoded base64 data into cv::Mat variable

Projects on open.

how to convert image in rectangle into gray??

I am a new in programming and opencv as well, I would like to learn it in a perfect way possible. how can I read a video from a file? is there any requirement to do so?

Numpy Arrays

How can I compare an ideal projection with a real projection?

HOG:How much to resize image when calculating HOG features?

Scene Reconstruction

Calculate affine transformation matrix

Finding Rank of Kernel

I have problem with changing array data to matrix.

Unexpected behavior of the program

why composeRT function is showing error for column vectors?

findChessboardCorners returing false boolean value?

identifier 'imshow' and 'waitkey' is undefined

How to read 10 bit tiff satellite image in opencv?

I am trying to recognize facial emotion using SVM, however every time I run the program I get an error stating "assertion failed (samples.cols== var_count && samples.type == CV_32F) in cv::ml::SVMImpl::predict in file....... line 1919"

I am working on recognition of faces in given videos with provided Data base.I am using createFisherFaceRecognizer() . But I am not getting Proper output. is it problem with Data base or the predict method, which i have used.

Default color space for frames in video

How to retrieve the matched lines from the BinaryDescriptorMatcher

Problem with call of function bm3dDenoising() and xphoto ...

How to compile opencv project in cmake [closed]

How to get the total number of black pixels in the connected component to which a pixel is attached?

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