hello, I am receiving an error . It says Undefined function or variable 'grayImage'. please let me know how i can define the function . here is my code

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[pixelCount, grayLevels] = imhist(grayImage);
bar(grayLevels, pixelCount); % Plot it as a bar chart.
grid on;
title('Histogram of original image', 'FontSize', fontSize);
xlabel('Gray Level', 'FontSize', fontSize);
ylabel('Pixel Count', 'FontSize', fontSize);
xlim([0 grayLevels(end)]); % Scale x axis manually.

Answers (1)

Peng Li
Peng Li on 30 Mar 2020
you have to have image data first which the grayImage is supposed to be. you can use imread to read an image in your disk for example.
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