modify this code to detect yellow colour

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

Answer 1

[Jan]

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.

[paf CEO]

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

[Jan]

@paf CEO: Your message is actually not a commant to my answer. Please open a new thread for a new question.

Answer 2

[manasi bharambe]

In the similar manner, how can I modify the above given code to detect orange colour in the image. please help

[Walter Roberson]

What is "orange" ?

[Abdou dgm]

please can you change the code to get the yellow color or tell us how to use hsv methode to get the yellow.

Answer 3

[Image Analyst]

See my HSV color detection demo to detect yellow:

http://www.mathworks.com/matlabcentral/fileexchange/28512-simplecolordetectionbyhue--