Hi pizzaa,
From your question I get that you want toperform the Gray Level Profile Method (GLPM) and find peaks by thresholding in an image.
Follow these steps to perform GLPM and find peaks:
- First Convert the image to grayscale if it is not already in grayscale. This can be done using the “rgb2gray” function in MATLAB.
- Calculate the gray level profile of the image. The gray level profile represents the variation of gray levels along a certain direction in the image. You can choose a specific direction (horizontal, vertical, diagonal) based on your requirements. To calculate the gray level profile, you can use the “improfile” function in MATLAB.
Refer to the below code snippet.
% Convert image to grayscale
imageArray = imread('GLPM.png');
grayImage = rgb2gray(imageArray);
% Calculate gray level profile along the horizontal direction
%Pass the direction and the number of points to the "improfile" function
profile = improfile(grayImage, [50, 500], [50, 300], 10);
smoothedProfile = smoothdata(profile);
% MinPeakHeight is the threshold value
[peaks, peakLocations] = findpeaks(smoothedProfile, 'MinPeakHeight', 5);
figure;
plot(profile);
hold on;
plot(peakLocations, peaks, 'ro', 'MarkerSize', 8);
xlabel('Position');
ylabel('Gray Level');
title('Gray Level Profile with Detected Peaks');
You can refer to the below documentation for more information.
