Where ever you click on the following link image, matlab code must find out the two edges and find out the distance between the those two points using [x,y]=ginput(1). http://imageshack.us/photo/my-images/600/imfill.jpg
MATLAB: How to find out the distance between the inner and outer edge of the image using the Matlab command [x,y]=ginput(1)
image analysisimage processingMATLAB
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Here's how to do it with ginput(1), rather than automatically, just like you asked for:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
imtool close all; % Close all imtool figures if you have the Image Processing Toolbox.
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;format compact;fontSize = 20;imshow('C:\Users\Naresh\Documents\Temporary\intq.png');% Ask for center using ginput(1)
message = sprintf('Please click at the center of the circles');button = questdlg(message, 'Continue?', 'OK', 'Quit', 'OK');drawnow; % Refresh screen to get rid of dialog box remnants.
if strcmpi(button, 'Quit') return;end[xCenter, yCenter] = ginput(1)hold on;markerSize = 30; % Size of the cross.
lineWidth = 2; % Thickness of the cross.
plot(xCenter, yCenter, 'r+', 'MarkerSIze', markerSize, 'LineWidth', lineWidth);% Ask for inner edge using ginput(1)
message = sprintf('Please click at the inner edge of the circles');button = questdlg(message, 'Continue?', 'OK', 'Quit', 'OK');drawnow; % Refresh screen to get rid of dialog box remnants.if strcmpi(button, 'Quit') return;end[xInner, yInner] = ginput(1)% Draw a cross at the point where they clicked.
plot(xInner, yInner, 'r+', 'MarkerSIze', markerSize, 'LineWidth', lineWidth);% Draw a line to it.
line([xCenter, xInner], [yCenter, yInner], 'Color', 'b', 'LineWidth', lineWidth);% Calculate diameter:
innerDiameter = sqrt((xInner-xCenter)^2+(yInner-yCenter)^2)% Ask for outer edge using ginput(1)
message = sprintf('The inner diameter = %.2f\n\nPlease click at the outer edge of the outer circles', innerDiameter);button = questdlg(message, 'Continue?', 'OK', 'Quit', 'OK');drawnow; % Refresh screen to get rid of dialog box remnants.if strcmpi(button, 'Quit') return;end[xOuter, yOuter] = ginput(1)plot(xOuter, yOuter, 'r+', 'MarkerSIze', markerSize, 'LineWidth', lineWidth);% Draw a line to it.line([xCenter, xOuter], [yCenter, yOuter], 'Color', 'b', 'LineWidth', lineWidth);% Calculate diameters:
outerDiameter = sqrt((xOuter-xCenter)^2+(yOuter-yCenter)^2)innerDiameter = sqrt((xInner-xCenter)^2+(yInner-yCenter)^2)message = sprintf('The outer diameter = %.2f\nThe inner diameter = %.2f',... outerDiameter, innerDiameter);uiwait(helpdlg(message));See my Image Segmentation Tutorial where I demonstrate that: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial---blobsdemo--
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