Questions - OpenCV Q&A Forum

2k

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2

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4

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2012-07-20 13:34:26 -0600 Ilya Lysenkov

Weird result while finding angle

7k

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2

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5

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2012-07-22 11:34:45 -0600 Misha

Sobel derivatives in the 45 and 135 degree direction

8k

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2

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6

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2013-05-16 20:20:19 -0600 RaulPL

Object recognition by edge (or corners) matching ?

14k

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2

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1

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2016-02-24 01:00:24 -0600 darshana.mistry

phase correlation for image registration(image stitching)

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2

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4

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2012-10-25 00:42:48 -0600 sammy

Detecting thick edges

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2

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5

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2013-12-22 02:54:36 -0600 mtourne

Filtering out coast line

873

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1

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2014-07-15 21:24:43 -0600 Witek

like the picture below,how can i deal with the blue edges?

edges

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3

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2016-02-16 13:44:41 -0600 pthomet

solvePnP fails with perfect coordinates (and cvPOSIT passes)

402

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2

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no

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2016-02-26 06:19:46 -0600 Finfa811

BSOD (Kernel Security Check Failure) when using T-API in OpenCV 3.1.0 x64 (VS12)

5k

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2

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no

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2016-03-02 14:47:00 -0600 Hernan Navarro

VideoCapture is not working in OpenCV 3.0.0 or the 3.1.0 in Windows 7

631

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2

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no

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2018-11-14 13:45:21 -0600 Filippo9669

How to detect the "external" pixels in an edge?

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2

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no

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2019-04-20 13:40:55 -0600 supra56

Remove white noise between white horizontal line

5k

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1

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4

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2012-08-10 14:56:16 -0600 Tharaki

How to detect square in a video using c++ and opencv?

3k

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1

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1

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2012-09-05 13:00:39 -0600 Lucas Walter

What is the easiest way to display a cv::Mat in a decoration free full-screen window?

860

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1

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-1

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2012-09-26 06:01:19 -0600 Kirill Kornyakov

build openCV for android, without CUDA

1k

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1

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no

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2013-02-16 02:22:33 -0600 Mathieu Barnachon

Find polygon in image (rotation-invariant)

338

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1

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no

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2018-09-06 14:16:51 -0600 MikeTronix

Help:I am puzzled by cvCalcHist function,can you help me?Thank you

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1

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2

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2016-11-07 22:41:20 -0600 Tetragramm

canny edge detection for 32 bit floats

1k

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1

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no

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2014-04-07 02:55:18 -0600 pj

extract point sequence of edge (a not enclosed contour)

631

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1

answer

1

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2014-05-17 17:31:17 -0600 FooBar

Image matching in a large image collection

596

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1

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no

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2014-10-27 04:41:45 -0600 R.Saracchini

When does cvEstimateRigidTransform recognise 2D point sets instead of images

470

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1

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no

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2015-02-26 14:37:59 -0600 matman

[Newbie] Can OpenCV find a straight boundary?

9k

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1

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no

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2016-02-10 09:00:36 -0600 FooBar

Reprojection error with opencv

2k

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1

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no

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2016-02-26 06:49:35 -0600 berak

How to calculate camera focal length in OpenCV

1k

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1

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2

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2016-02-26 17:57:41 -0600 sturkmen

eliminating edges

206

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1

answer

no

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2016-03-02 18:56:46 -0600 Tetragramm

Scan and find the length and breadth of object from iPhone camera

iphone
edges

328

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1

answer

no

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2016-03-03 01:44:34 -0600 Pulkit

Matlab haar cascade opencv android compatibility

278

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1

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no

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2016-03-04 19:18:46 -0600 Tetragramm

Comparing patterns on coins.

1k

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1

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1

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2016-10-11 16:29:14 -0600 Gabriel Alacchi

Does OpenCV have a built in Edge Boxes implementation?

90

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1

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no

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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.

83 questions

Weird result while finding angle

Sobel derivatives in the 45 and 135 degree direction

Object recognition by edge (or corners) matching ?

phase correlation for image registration(image stitching)

Detecting thick edges

Filtering out coast line

like the picture below,how can i deal with the blue edges?

solvePnP fails with perfect coordinates (and cvPOSIT passes)

BSOD (Kernel Security Check Failure) when using T-API in OpenCV 3.1.0 x64 (VS12)

VideoCapture is not working in OpenCV 3.0.0 or the 3.1.0 in Windows 7

How to detect the "external" pixels in an edge?

Remove white noise between white horizontal line

How to detect square in a video using c++ and opencv?

What is the easiest way to display a cv::Mat in a decoration free full-screen window?

build openCV for android, without CUDA

Find polygon in image (rotation-invariant)

Help:I am puzzled by cvCalcHist function,can you help me?Thank you

canny edge detection for 32 bit floats

extract point sequence of edge (a not enclosed contour)

Image matching in a large image collection

When does cvEstimateRigidTransform recognise 2D point sets instead of images

[Newbie] Can OpenCV find a straight boundary?

Reprojection error with opencv

How to calculate camera focal length in OpenCV

eliminating edges

Scan and find the length and breadth of object from iPhone camera

Matlab haar cascade opencv android compatibility

Comparing patterns on coins.

Does OpenCV have a built in Edge Boxes implementation?

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.

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