modify this code to detect yellow colour

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Faizal 2011-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/4508-modify-this-code-to-detect-yellow-colour

回答： Image Analyst 2017-3-17

where should I modify to get the result of yellow colour

http://www.codeproject.com/Questions/83784/Matlab-colour-detection.aspx

please anyone show to me

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Answer 1

Jan 2011-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/4508-modify-this-code-to-detect-yellow-colour#answer_6278

在 MATLAB Online 中打开

What is "yellow"? A color with high red and green components:

yellow_redThreshold   = 200;
yellow_greenThreshold = 200;
yellowMask = (redBand > yellow_redThreshold) & ...
             (greenBand > yellow_greenThreshold);

Perhaps you want a low blue component also?

...
yellow_blueTreshold = 100;
yellowMask = (blueBand < yellow_blueTreshold) & ...
             (redBand > yellow_redThreshold) & ...
             (greenBand > yellow_greenThreshold);

I'd prefer the HSV color space to determine a color.

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paf CEO 2011-4-6

HI

I am new to Image processing, i want to make a programe in matlab where i can detect colour " red " , "green" & "blue "

i will save image in workspace /current directory , and then by using if else statment i will detect whats the colour of image ,if image is green it should display "green", if it is red then it should display "red" similarly for blue

if any one knows this , reply me back with coding