Questions - OpenCV Q&A Forum

225

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2

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no

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2020-04-09 14:29:17 -0500 supra56

I can't draw the contour approximation, I use a green square to take the video but no contour on it.

2

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2020-04-09 13:25:25 -0500 chchang6

Test failure with opencv_perf_tracking

cvtest
build

14

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1

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no

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2020-04-09 11:46:21 -0500 Eduardo

Using solvePnP with fixed center of rotation

13

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2020-04-09 10:24:09 -0500 Abdelrahman

Color blending two images

c++

9

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2020-04-09 08:02:58 -0500 SylvainArd

extracting the contour of the underside of bramble stems

5

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2020-04-09 07:56:43 -0500 noshky

1D->2D pose estimation - detect 2D camera location

15

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1

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1

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2020-04-09 04:48:51 -0500 berak

python code in tutorial "file input and output using xml and yaml files"

17

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2020-04-09 02:20:58 -0500 berak

Procedure for getting 3D coordinates from Stereo?

15

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2020-04-08 21:54:42 -0500 redhwan

How to extract a feature from OpenCV instead of skimage?

14

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2020-04-08 20:26:25 -0500 alittlebirdy

Using convertTo corrupts the image

c++opencv

7

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2020-04-08 18:07:31 -0500 h4k1m

Dot product on Vec2s returning incorrect results

dot
vectors

25

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1

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2020-04-08 17:46:59 -0500 berak

gcc: error: long: No such file or directory

114

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1

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2020-04-08 15:28:04 -0500 noshky

SolvePNP_P3P doesn't work for 4 points. Please help.

11

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2020-04-08 13:49:51 -0500 berak

openCV function '.read()' return (False, None)

None

16

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1

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2020-04-08 10:32:53 -0500 berak

LSH knnSearch slow in large dataset

13

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2020-04-08 09:47:54 -0500 edif

How to determine and compensate for light falloff during stitching

28

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2020-04-08 07:32:16 -0500 berak

[Darknet-off topic] Cannot load image "-dont_show" despite patch of images and opencv OK [closed]

darknet

17

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1

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1

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2020-04-08 06:33:09 -0500 berak

convexityDefects errors

16

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-1

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2020-04-08 01:42:27 -0500 Srini9

Suggestion on a usecase

15

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2020-04-07 23:45:47 -0500 WayneCho

How can I measure the difference between two gradient maps? Is there any metric?

imageprocessing

13

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no

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no

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2020-04-07 20:27:50 -0500 Assaf M

Identifying positive pixels after color deconvolution ignoring boundaries

24

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no

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-1

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2020-04-07 15:20:17 -0500 sonam

cv2.error: OpenCV(4.2.0)

2dimage

10

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2020-04-07 09:40:54 -0500 TheCakeLover

hpoints > 0: Error using convexityDefects() [closed]

106

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1

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no

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2020-04-07 09:06:53 -0500 zelda

Android studio: undefined reference to cv::Stitcher

31

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no

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2020-04-07 04:44:43 -0500 gaby

SIGSEGV in libopencv_core.4.1.dylib called from java, works on one machine but not another [closed]

23

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1

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2020-04-07 02:26:43 -0500 hamsolo474

contourArea strange behaviour

20

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1

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2020-04-07 01:42:41 -0500 berak

Measuring color difference from an ROI within the image using DeltaE color difference?

14

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no

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2020-04-06 23:30:25 -0500 George_cwg

_MM_PERM_ACBD problem in opencv 4.3.0 compiling

20

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no

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no

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2020-04-06 22:01:23 -0500 LearningCV

training haar cascade with single positive sample

13

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no

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no

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2020-04-06 16:51:53 -0500 becca

32,849 questions

I can't draw the contour approximation, I use a green square to take the video but no contour on it.

Test failure with opencv_perf_tracking

Using solvePnP with fixed center of rotation

Color blending two images

extracting the contour of the underside of bramble stems

1D->2D pose estimation - detect 2D camera location

python code in tutorial "file input and output using xml and yaml files"

Procedure for getting 3D coordinates from Stereo?

How to extract a feature from OpenCV instead of skimage?

Using convertTo corrupts the image

Dot product on Vec2s returning incorrect results

gcc: error: long: No such file or directory

SolvePNP_P3P doesn't work for 4 points. Please help.

openCV function '.read()' return (False, None)

LSH knnSearch slow in large dataset

How to determine and compensate for light falloff during stitching

[Darknet-off topic] Cannot load image "-dont_show" despite patch of images and opencv OK [closed]

convexityDefects errors

Suggestion on a usecase

How can I measure the difference between two gradient maps? Is there any metric?

Identifying positive pixels after color deconvolution ignoring boundaries

cv2.error: OpenCV(4.2.0)

hpoints > 0: Error using convexityDefects() [closed]

Android studio: undefined reference to cv::Stitcher

SIGSEGV in libopencv_core.4.1.dylib called from java, works on one machine but not another [closed]

contourArea strange behaviour

Measuring color difference from an ROI within the image using DeltaE color difference?

_MM_PERM_ACBD problem in opencv 4.3.0 compiling

training haar cascade with single positive sample

Stereo Camera fisheye rectification problem

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