Questions - OpenCV Q&A Forum

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2018-06-01 03:46:31 -0600 ac123

Detecting/highlighting hot pixels (not removing them)

Hot
pixel

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2018-07-06 07:33:58 -0600 mayra

How can we check if a particular pixel is in this pixel range or not?

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2018-08-28 14:54:46 -0600 MikeTronix

I have an image with all pixel values 0 i.e black image, i want to access pixels at certain image coordinates more then a 100 and change the value to 1 how can i do this using opencv python and for loops if possible?

966

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2018-10-09 05:46:00 -0600 dadiaar

Show the brightness channel for each pixel

506

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1

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2018-10-27 12:06:50 -0600 berak

color percentage in image

423

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2019-01-30 17:37:29 -0600 Vigneshraja

Image pixels of RGB frame to x and y coordinates in camera frame ( in Gazebo simulation)

271

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2019-02-21 05:29:37 -0600 berak

grayscale image pixel-based detect object

307

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2019-04-01 10:21:37 -0600 mdresser

Extract pixel value from Mat not working (for me)

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2019-10-11 02:29:38 -0600 lacrast

OpenCV Single Channel Pixel Value Number Colour [closed]

pixel
value

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2

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2012-12-04 03:16:07 -0600 Siegfried

Accessing pixel value always return same value

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2013-03-13 02:51:25 -0600 Daniil Osokin

How can I work with pixels of an image directly?

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2013-03-20 20:41:41 -0600 piedar

Arbitrary grayscale pixel range

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1

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2013-04-27 01:47:15 -0600 wuling

modifying pixel value

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3

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2017-08-09 14:31:22 -0600 NerdyDroneBuilder

How to get pixel's value from a picture?

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2014-02-25 06:09:27 -0600 Markus Bader

drawing a single pixel using a cv::Mat image (cvSet2D?)

614

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1

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1

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2014-11-14 04:14:40 -0600 berak

modify pixel of image with 0.01

396

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1

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1

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2016-03-19 10:59:36 -0600 Tetragramm

understanding the idea behind some code snippet

8k

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4

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2016-06-10 04:43:37 -0600 AsparaJoe

Find the number of white pixels in contour

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2015-06-22 06:26:05 -0600 Tanq

Set pixel format

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2015-07-06 08:46:16 -0600 Javelin

Calculate pixel angle from the center having hFov and vFov

416

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1

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2016-02-04 12:08:58 -0600 goldroses

Obtaining Pixelvalue with various formats

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1

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1

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2017-12-21 00:54:25 -0600 moHe

Python faster pixel access

234

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1

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2018-01-08 19:59:16 -0600 sjhalayka

trouble understanding pixel access

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2019-01-30 01:53:14 -0600 DanielPi

How is the principal point defined?

pixel

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1

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2

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2013-02-02 10:20:41 -0600 Alexander Smorkalov

android ndk level access to camera video stream/pixels

8k

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1

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2

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2013-02-28 03:30:32 -0600 AlexanderShishkov

How to access pixel values of CV_32F/CV_64F Mat?

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1

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2

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2013-03-10 04:51:39 -0600 Daniil Osokin

Accessing pixels in Mat using Android (Java API)

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2

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2013-05-27 23:58:10 -0600 Pranav Lal

Seeking help with converting opencv webcam output to pixel coordinates for integrating with sensory substitution program [closed]

2k

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2

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3

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2012-07-14 16:41:14 -0600 Michael Burdinov

Extracting a vector of pixel values across multiple frames

10k

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1

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3

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2017-06-16 13:20:40 -0600 berak

91 questions

Detecting/highlighting hot pixels (not removing them)

How can we check if a particular pixel is in this pixel range or not?

I have an image with all pixel values 0 i.e black image, i want to access pixels at certain image coordinates more then a 100 and change the value to 1 how can i do this using opencv python and for loops if possible?

Show the brightness channel for each pixel

color percentage in image

Image pixels of RGB frame to x and y coordinates in camera frame ( in Gazebo simulation)

grayscale image pixel-based detect object

Extract pixel value from Mat not working (for me)

OpenCV Single Channel Pixel Value Number Colour [closed]

Accessing pixel value always return same value

How can I work with pixels of an image directly?

Arbitrary grayscale pixel range

modifying pixel value

How to get pixel's value from a picture?

drawing a single pixel using a cv::Mat image (cvSet2D?)

modify pixel of image with 0.01

understanding the idea behind some code snippet

Find the number of white pixels in contour

Set pixel format

Calculate pixel angle from the center having hFov and vFov

Obtaining Pixelvalue with various formats

Python faster pixel access

trouble understanding pixel access

How is the principal point defined?

android ndk level access to camera video stream/pixels

How to access pixel values of CV_32F/CV_64F Mat?

Accessing pixels in Mat using Android (Java API)

Seeking help with converting opencv webcam output to pixel coordinates for integrating with sensory substitution program [closed]

Extracting a vector of pixel values across multiple frames

how to get the position of a pixel with the mouse?

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