How to get Pixels on two circles with radii R and R' for an image with angles 0, 45, 90, 135, 180, 225, 270, 315, 360.Extented local Binary Pattern(ELBP)

How to get Pixels on two circles with radii R and R' for an image with angles 0, 45, 90, 135, 180, 225, 270, 315, 360.Extented local Binary Pattern(ELBP)

Answer 1

[Image Analyst]

Well, you know the formulas, don't you

x = xCenter + r * cosd(theta)
y = yCenter + r * sind(theta)

and so on. So where are you having trouble? Just round it to get the columns and rows

column = round(x);
row = round(y);
pixelValue = yourImage(row, column);

I'm attaching my LBP demo.

[Rashmi.D Jeya kumar]

Thank you so much sir!! I got answer for LBP

meanval = mean2(grayImage);
x=centerPixel-meanval;
if(x<0)
    ELBP_CI=0;
end
if(x>=0)
    ELBP_CI=1;
end

Is it the right way to describe the formula in image above?

[Image Analyst]

Try

meanval = mean2(grayImage);
ELBP_CI = double((centerPixel-meanval) >= 0);

[Rashmi.D Jeya kumar]

Thank you so much sir it is working

[Rashmi.D Jeya kumar]

R=2;%radius Angles = [0, 45, 90, 135, 180, 225, 270, 315, 360]; x = R*cos(Angles*pi/180) ; y = R*cos(Angles*pi/180) column = round(x); row = round(y); pixelValue = grayImage(row, column); explain in detail sir it is not working to find pixel values for particular angle in circle with radius R of an image

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

[Rashmi.D Jeya kumar]

   R=2;%radius 
   Angles = [0, 45, 90, 135, 180, 225, 270, 315, 360];
   x = R*cos(Angles*pi/180) ;
   y = R*cos(Angles*pi/180) 
  column = round(x);
   row = round(y); 
  pixelValue = grayImage(row, column);

explain in detail sir it is not working to find pixel values for particular angle in circle with radius R of an image