images color

how to apply a particular color(e.g., green) in particular area.

Answer 1

[Stefan]

is the area under a curve or between two curves?

then use: http://www.mathworks.de/help/techdoc/ref/area.html

otherwise, do you have a mask, in which every point which shall be green =1 and ever other =0?

then apply:

 rgb=size(mask);
 rgb(:,:,1)=0; 
 rgb(:,:,2)=mask;  
 rgb(:,:,3)=0;
 imhsow(rgb);

if you do not have a mask, you have to create one... hope i could help you

[Sivakumaran Chandrasekaran]

Hi stefan,

Thanks for replying. Please mail me a format for mask also. Because i can follow your style of code entirely.

[Image Analyst]

For example, you could get the mask by thresholding:

mask = grayImage < someThresholdValue;

rgb(:,:,2) = 255 * uint8(mask);

[Sivakumaran Chandrasekaran]

Hi Image Analyst,

Thanks for writing. now the problem has been solved from the guidance of your reply, which you gave in the link http://www.mathworks.in/matlabcentral/answers/34880-images.

Thank you

[Sivakumaran Chandrasekaran]

Hi Image Analyst,

Thanks for writing. now the problem has been solved from the guidance of your reply, which you gave in the link http://www.mathworks.in/matlabcentral/answers/34880-images.

Thank you

Answer 2

[Stefan]

look at this example, i think its the easiest way to get a mask

http://www.mathworks.de/help/toolbox/images/ref/graythresh.html

consider if the output values are correct. extraction of concrete pattern can be quite difficult and is an issue in many segmentation research studies...

[Sivakumaran Chandrasekaran]

Thanks stefan. I found the right code for my project now. thanks for your support.