How to plot intensity profile of a 3D image

Greetings to all !

I have a 3D image matrix which is sheep logan phantom. And I want to plot the intensity profile of the along Vertical direction and horizontal direction separately? But I am confused how to do it ! Can anyone help me ?

Thanks in ADVANCE!

[Image Analyst]

What do you mean by profile? Do you mean projection (to get a 2-D image)? If so, mean, sum, or max projection? Or do you mean just along a certain line (to get a 1-D profile)? If so, how are you defining the line through the 3-D volume?

[Amit Chakraborty]

@Image Analyst,

I try to say intensity plot instead of profile. Yes you are correct I want the intensity plot along a certain line (to get a 1-D profile). Like the following picture.

Answer 1

[Image Analyst]

You can do

rgbImage = imread('peppers.png');
subplot(2, 1, 1);
imshow(rgbImage);
axis('on', 'image')
xline(205, 'Color', 'r', 'LineWidth', 2);
column205 = rgbImage(:, 205,:);
subplot(2, 1, 2);
plot(column205(:, 1), 'r-', 'LineWidth', 2);
hold on;
plot(column205(:, 2), 'g-', 'LineWidth', 2);
plot(column205(:, 3), 'b-', 'LineWidth', 2);
grid on;
legend('Red', 'Green', 'Blue');