How to extract RGB information from an segmented image excluded white background.
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Leow Bin
am 22 Jul. 2017
Kommentiert: Image Analyst
am 22 Jul. 2017
Hi, I am working on project about image processing. I would like to know about how to extract the RGB information from an segmented image excluded the white background. I only need the RGB value for my region of interest, and I don't want the white pixels RGB value to exist in my data file. Thank you.
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 22 Jul. 2017
Get a mask of where white is, then extract pixels from where it's not white
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
whiteMask = redChannel == 255 & greenChannel == 255 & blueChannel == 255;
redValues = redChannel(~whiteMask);
greenValues = greenChannel(~whiteMask);
blueValues = blueChannel(~whiteMask);
2 Kommentare
Image Analyst
am 22 Jul. 2017
Note, if white is just bright areas, then you don't have to use just pure 255, it can be any values above some intensity that you consider "white", so for example you can do:
whiteMask = redChannel >= 200 & greenChannel >= 225 & blueChannel >= 230;
Weitere Antworten (1)
KALYAN ACHARJYA
am 22 Jul. 2017
Bearbeitet: KALYAN ACHARJYA
am 22 Jul. 2017
You can directly calculate the R G B from the image, Apply If R=255, G=255, B=255, then ignore the region else ...do your program. Similar Image is needed for more clarification.
Please note: I am beginner in Matlab
Siehe auch
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!