Detecting white color in moving video
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
What change I have to do in given code below to detect white color from video and get it's brightness.
snap_red = imsubtract(snap(:,:,1), rgb2gray(snap));
0 Kommentare
Antworten (1)
Image Analyst
am 8 Nov. 2015
See my demo http://www.mathworks.com/matlabcentral/fileexchange/28512-simple-color-detection-by-hue It would be something like this
hsvImage = rgb2hsv(double(rgbImage));
h = hsvImage(:,:,1);
s = hsvImage(:,:,2);
v = hsvImage(:,:,3);
whitePixels = s < 0.2 & v > 0.8;
or something like that.
whitePixels is a binary image, or "mask". Feel free to modify the parameters.
See my demo where I track a green Sharpie pen.
2 Kommentare
Image Analyst
am 9 Nov. 2015
It works for me. Was that for my demo video, or for one of yours? If you put a breakpoint on this line and execute it,
% Setup other parameters
numberOfFrames = videoObject.NumberOfFrame;
what does it say numberOfFrames is? Is the videoObject a valid object?
Siehe auch
Kategorien
Mehr zu Language Support finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!