MATLAB: 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)

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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)

Best Answer

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.

Related Solutions

MATLAB: How can i draw bicircles with radius R and R’ for ELBP(extented local binary pattern ) and find (g0,g1,g2..g7)R and (g0,g1,g2..g7)R’

You know the locations.....they are at angles 0, 45, 90, 135, 180, 225, 270, 315 and 360 degrees.

Angles = [0, 45, 90, 135, 180, 225, 270, 315, 360] ;   % location in degrees 
% In polar coordinates 
iwant = [repmat(R,1, length(Angles)); Angles*pi/180]
% In cartesian coordinates 
x = R*cos(Angles*pi/180) ;
y = R*cos(Angles*pi/180) ;

Where R is your radius of circle

MATLAB: How to get Pixels intensities on a circles with radii R for an image with selective angles

Try this:

for k = 1 : length(x)
    row = round(y(k)); % Round to nearest integer.

    col = round(x(k)); % Round to nearest integer.
    pixelValues(k) = grayImage(row, col);
end

Best Answer

Related Solutions

MATLAB: How can i draw bicircles with radius R and R’ for ELBP(extented local binary pattern ) and find (g0,g1,g2..g7)R and (g0,g1,g2..g7)R’

MATLAB: How to get Pixels intensities on a circles with radii R for an image with selective angles

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