How to find minimum and maximum pixel value in image
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Hello Everyone, i hope you are doing well.
I have the following to images. i want detect the pattern and find the minimum and maximum value for the pattern
for example the first image sinewave. i want to detect the shape and find the value for upper peak and lower peak.
same for the second image
Can anybody help me in that
Atsushi Ueno on 19 Mar 2022
Edited: Atsushi Ueno on 20 Mar 2022
>i want detect the pattern and find the minimum and maximum value for the pattern
The images have black background with value 0 and a white line with value 255.
You can use max(org:find) function to find non-zero value in each columns in the picture data.
image = imread('im_003002.png');
[~, wave] = max(image); % thx @Scott MacKenzie for x = 1:size(image,2) wave(x) = find(image(:,x)); end
max(wave) % It is y coordinate value of each dots on the white line.
min(wave) % It is y coordinate value of each dots on the white line.