How can I define red color in HSV space
10 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
THUONG NGUYEN VAN
am 4 Mai 2013
Kommentiert: Image Analyst
am 10 Nov. 2013
I have problem when using webcam to detect and track object by masking colors in HSV space. my code work well with yellow, green or blue color but red color.
I already define the threshold for these colors
please help me.
here is my code
% red
hueThresholdLowred1 = 0.05; hueThresholdHighred1 = 0.97;
saturationThresholdLowbred1 = 0.3; saturationThresholdHighred1 = 1;
valueThresholdLowred1 = 0.01; valueThresholdHighred1 = 1;
% find red color
hueMaskred1 = (hImage1 <= hueThresholdLowred1)&(hImage1 >= hueThresholdHighred1);
saturationMaskred1 = (sImage1 >= saturationThresholdLowbred1) & (sImage1 <= saturationThresholdHighred1);
valueMaskred1 = (vImage1 >= valueThresholdLowred1) & (vImage1 <= valueThresholdHighred1);
redObjectsMask1 = hueMaskred1 & saturationMaskred1 & valueMaskred1;
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 4 Mai 2013
It is not possible for a number to be both less than 0.05 and greater than 0.97. Your statement
hueMaskred1 = (hImage1 <= hueThresholdLowred1)&(hImage1 >= hueThresholdHighred1);
is wrong (at least in terms of the values you set for those thresholds.)
Are you looking for values that are between 0.97 and 1, together with values that are between 0 and 0.05 ? Sounds like a narrow range to me, but if it is what you are looking for, change the "&" to "|"
3 Kommentare
Image Analyst
am 10 Nov. 2013
See several color segmentation demos in my File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 Feel free to modify any of them.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Large Files and Big Data 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!