MATLAB: Calculate center point of curve created using improfile()

Image Processing Toolboximprofile

hi I have created the intensity curve using improfile() matlab function on y-axis i got intensities and on x-axis i got distance along the profile How can i get the center point of the distance along the profile, i have the intensity values.

Thanks

Best Answer

Use all output arguments of improfile

[cx,cy,c,xi,yi] = improfile
center=(xi+yi)/2

Related Solutions

MATLAB: Improfile: Integrating over many pixels

One way would be to make a temporary image using imrotate() where you rotate the line so that it's aligned with rows or columns, then extract several rows or columns and average them.

rotatedImage = imrotate(grayImage, angle);
subImage = rotatedImage(row1:row2, col1:col2);
profile = mean(subimage, 1);

You'll need to figure out the angle and the starting and ending rows and columns, but it's just pure geometry - I'm sure you can do it.

MATLAB: How to get profile coordinates x,y after using improfile

What about this

clc,clear
close
figure('windowstyle','docked')
I = imread('image.png');
imshow(I)           % show image
h = msgbox('select the profile');   
waitfor(h)          % wait of "OK" button
p = impoly;         % pick points to create improfile
xy = p.getPosition; % get xy data
[cx,cy,c] = improfile(I,xy(:,1),xy(:,2));
ax1 = axes('position',[.6 .2 .3 .3]); % create small window
line(cx,c(:,1,1),'color','r')         % plot red channel
line(cx,c(:,1,2),'color','g')         % plot green channel
line(cx,c(:,1,3),'color','b')         % plot blue channel

Best Answer

Related Solutions

MATLAB: Improfile: Integrating over many pixels

MATLAB: How to get profile coordinates x,y after using improfile

Related Question