MATLAB: How to make label on the image and find the distance

image analysisimage processingImage Processing Toolboxlabeling image

Hello,

I have one image and i want to put label on it for finding the distace.

anyone suggest or give code to make label on that region which shown in fig. and also want to plot line between two black line in that box.

alos i attched my file to look at my code.

Best Answer

I don't know how a label would help you "for finding the distace". But anyway, to put a text label on the image use the text() function. To put a rectangle on the image use the rectangle() function. To plot over the image, use the plot() function.

When you say "finding distance between two black line" I don't know what that means. There are lots of distances between lots of points on two black lines, like your horizontal line and your vertical line. What distance are you talking about?

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MATLAB: Can anyone please explain the meaning of this code

MATLAB is rich with documentation, you may read the respective functions documentation.

boundaries=bwboundaries(handImage1);    % get;s the boudaries of the feature present in the image, the output is cell
x = boundaries{1}(:, 2);   % select x coordinates of first boundary 
y = boundaries{1}(:, 1);   % select y coordinates of first boundary 
hold on;
plot(x, y, 'black', 'LineWidth', 2);  % plotting the first boundary 
newImage = bwlabel(handImage1);       % labelling the image 
measurements = regionprops(newImage, 'Centroid', 'BoundingBox');  % get the properits of the region 
% picking the centroid of the first label 
xCentroid = measurements.Centroid(1);
yCentroid = measurements.Centroid(2);
subplot(2, 2, 4);   % sub plotting 
imshow(newImage);   % shows image 
title('Binary Image with Centroid Marked'); 
hold on;
plot(xCentroid, yCentroid, 'r*', 'MarkerSize', 10, 'LineWidth', 2);   % plotting the coentorid

MATLAB: How to compute centroidal distances

I assume you mean regionprops(BW, I ,'WeightedCentroid') ? You need an intensity image I, to invoke that option.

Best Answer

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MATLAB: Can anyone please explain the meaning of this code

MATLAB: How to compute centroidal distances

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