How to retrieve data points from a grayscale histogram?

Hello! I have a grayscale image and its histogram. How do can I extract data points from this histogram? Say, the number of pixels for each value of the grayscale; I need to put that information into excel.

Thank you.

Answer 1

[Image Analyst]

Try this:

grayImage = imread('cameraman.tif'); % Read in image.
counts = imhist(grayImage) % Take histogram
grayLevels = 0 : (length(counts) - 1) % Construct gray level vector.
dataForExcel = [grayLevels(:), counts] % Stitch them together into one array.
writematrix(dataForExcel, 'data.xlsx'); % Write an  Excel workbook.

[Luis Fernandez]

You are a god dude, love ya

Answer 2

[Sulaymon Eshkabilov]

(1) Import// read your image in matlab

(2) perform histogram analysis with hostogram(), e.g: h= histogram() or h = histogram2()

See this doc: https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.histogram2.html

(3) Collect necessary data from h that would be a structure array containing all data.