How to count occurrence of every character of a image in MATLAB R2019b?

I want to count the occurrence of every character of a image using OCR in MATLAB R2019b. Image is attached.

Thanks

[KSSV]

What have you tried?

[Balkar Singh]

clear all;

img = imread('Image1.png');% Read secret image

ocr1 = ocr(img);

str = ocr1.Text;

str = lower(str);

out_str = regexp(str, '[a-z]', 'match');

count_occr = count(out_str, '[a-z]', 'IgnoreCase', true);

This is the code i tried

Answer 1

[Image Analyst]

Use the ocr() function

txt = ocr(yourImage);

[Image Analyst]

Close, but try it this way:

% Read input image that has letters on it.
img = imread('Image1.png');
% Call the ocr function to get letters from the image.
letters = ['a':'z', 'A':'Z']
ocrObject = ocr(img, 'CharacterSet', letters)
str = lower(ocrObject.Text)
out_str = regexp(str, '[a-z]', 'match'); % Maybe not needed
% Get the count of all the letters.
allLetters = char(out_str) - 'a' + 1;
histogram(allLetters);
grid on
title('Histogram of Letter Occurrences', 'FontSize', fontSize);
xlabel('Letter', 'FontSize', fontSize);
ylabel('Count', 'FontSize', fontSize);

[Balkar Singh]

Thanks, it's working.

But I want to count how many times a letter is repeated in a image. Like m is 30 times used in the text of a image.

Please help.

[Image Analyst]

Do you know what a histogram is?

[Balkar Singh]

Histogram counts the occurrence of a value. I also tried as given below code

img = imread('Image1.png');

ocrObject = ocr(img);

str = lower(ocrObject.Text);

histogram(str);

But it is not working.

[Image Analyst]

then why do that? Why did you not use the code I gave you?

If you had, you could see from the bar chart that the count for m (the 12th letter) is 2.

If you want the counts in an array you can either get the output of histogram

histObject = histogram(allLetters);

or you can use histcounts() instead:

counts = histcounts(allLetters);

[Balkar Singh]

Thanks

[Balkar Singh]

After using histcounts i got the following output

11 2 4 6 21 2 3 9 17 0 4 0 2 11 16 5 2 9 14 21 5 2 7 0 1

Is it possible to generate the Markov Matrix of this output.