Questions - OpenCV Q&A Forum

7k

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2

answers

no

votes

2017-11-02 07:27:29 -0600 supra56

AttributeError: 'module' object has no attribute 'CAP_PROP_FRAME_HEIGHT'

883

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2

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no

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2017-11-04 14:12:00 -0600 supra56

AttributeError: 'module' object has no attribute 'createBackgroundSubtractorMOG'

BackgroundSubtractor

14k

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2

answers

no

votes

2017-12-01 11:28:32 -0600 pipeecs780

How to measure distance between 2 objects in a video? - Edited

4k

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2

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no

votes

2017-11-09 21:06:18 -0600 supra56

Assertion Failed Opencv Python unlock

6k

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2

answers

3

votes

2017-11-12 10:18:56 -0600 sturkmen

Matching colors between two pictures in OpenCV?

2k

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2

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no

votes

2017-11-22 08:31:24 -0600 fywa_prolge

cv::cudacodec::createVideoReader segfault

5k

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2

answers

1

vote

2017-11-16 03:16:25 -0600 ChukZ

Detecting rectangle on android

659

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2

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no

votes

2017-11-17 02:08:38 -0600 berak

mask in FlannBasedMatcher::match doesn't work normally

mask
matcher

1k

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2

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no

votes

2017-11-20 03:10:42 -0600 ajay_127

Hough Transform for Rectangle Detection

6k

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2

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no

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2017-11-17 13:20:36 -0600 berak

How to show every image in every loop

GUI
imshow

2k

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2

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no

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2017-11-18 08:38:50 -0600 supra56

how to read video from webcam with opencv3.3 and python3.5 on ubuntu 16.04?

13k

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2

answers

1

vote

2017-11-22 20:05:13 -0600 sjhalayka

Adjust hue and saturation like Photoshop

585

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2

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no

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2017-11-20 22:06:28 -0600 Balaji R

Same function but different result

1k

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2

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no

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2017-11-22 22:18:01 -0600 sibowsb

Compile-time errors with cv::TiffDecoderBufHelper

13k

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2

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no

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2017-11-24 21:24:08 -0600 sjhalayka

how to detect object and pattern and retrieve the angle of orientation

c++
opencv

1k

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2

answers

-1

votes

2017-11-30 21:15:31 -0600 supra56

why I can’t use sift/surf

opencvpython

1k

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2

answers

no

votes

2017-11-28 11:54:01 -0600 matman

how to accelerate filter2D with multi-core CPU?

Convolution

411

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2

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no

votes

2017-12-01 03:16:40 -0600 ya_ocv_user

Are there reliable algorithms to detect elementary 2D figures?

3k

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2

answers

no

votes

2017-11-29 03:50:43 -0600 supra56

How to fix this error: grayscaled = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) cv2.error: /io/opencv/modules/imgproc/src/color.cpp:10638: error: (-215) scn == 3 || scn == 4 in function cvtColor?

opencvpython

1k

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2

answers

no

votes

2017-12-01 06:13:15 -0600 supra56

detailsEnchance giving error: (-215) (scn == 3 || scn == 4) && (depth == CV_8U || depth == CV_32F) in function cvtColor

detailEnhance#python

2k

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2

answers

1

vote

2017-12-06 08:34:37 -0600 VxW

Video processing to detect a logo in frames

12k

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2

answers

3

votes

2017-12-07 16:12:12 -0600 sjhalayka

why is CV_32FC1 not normalized to 0-1?

CV_32FC1

735

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2

answers

1

vote

2017-12-08 12:07:05 -0600 sturkmen

TRAIN_HOG.cpp

646

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2

answers

no

votes

2017-12-15 20:14:05 -0600 sjhalayka

ANN_MLP output training value of 1 causes error

1k

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2

answers

no

votes

2017-12-19 10:28:50 -0600 Rodrigo2019

(DNN) different results between version 3.3.0 and 3.3.1

2k

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2

answers

1

vote

2017-12-17 02:39:22 -0600 berak

Building calib3d in OpenCV.js

2k

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2

answers

no

votes

2017-12-22 20:06:44 -0600 sjhalayka

Energy computation of DCT of image +

246

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2

answers

no

votes

2017-12-18 04:02:13 -0600 supra56

Object tracking using OpenCV ..I am not able to understand some part of code

944

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2

answers

no

votes

2017-12-21 21:33:45 -0600 moHe

Measuring height and weight of rectangle

android
java

1k

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2

answers

1

vote

2017-12-21 09:21:32 -0600 sushiqian

How to find the center of one palm in the picture

opencv

29,830 questions

AttributeError: 'module' object has no attribute 'CAP_PROP_FRAME_HEIGHT'

AttributeError: 'module' object has no attribute 'createBackgroundSubtractorMOG'

How to measure distance between 2 objects in a video? - Edited

Assertion Failed Opencv Python unlock

Matching colors between two pictures in OpenCV?

cv::cudacodec::createVideoReader segfault

Detecting rectangle on android

mask in FlannBasedMatcher::match doesn't work normally

Hough Transform for Rectangle Detection

How to show every image in every loop

how to read video from webcam with opencv3.3 and python3.5 on ubuntu 16.04?

Adjust hue and saturation like Photoshop

Same function but different result

Compile-time errors with cv::TiffDecoderBufHelper

how to detect object and pattern and retrieve the angle of orientation

why I can’t use sift/surf

how to accelerate filter2D with multi-core CPU?

Are there reliable algorithms to detect elementary 2D figures?

How to fix this error: grayscaled = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY) cv2.error: /io/opencv/modules/imgproc/src/color.cpp:10638: error: (-215) scn == 3 || scn == 4 in function cvtColor?

detailsEnchance giving error: (-215) (scn == 3 || scn == 4) && (depth == CV_8U || depth == CV_32F) in function cvtColor

Video processing to detect a logo in frames

why is CV_32FC1 not normalized to 0-1?

TRAIN_HOG.cpp

ANN_MLP output training value of 1 causes error

(DNN) different results between version 3.3.0 and 3.3.1

Building calib3d in OpenCV.js

Energy computation of DCT of image +

Object tracking using OpenCV ..I am not able to understand some part of code

Measuring height and weight of rectangle

How to find the center of one palm in the picture

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