histogram from binary image

Hi, I'am calculating the histogram from a binary image, I am using the following code, but my histogram is empty, besides the grayscale turns out a proper histogram. Can you kindly help me? Thanks a lot.

I = imread('test.png');

figure;

[ counts , binLocations ] = imhist(I,2);

figure;

imhist(I);

Answer 1

[KALYAN ACHARJYA]

What does histogram mean: it counts the number of pixels as per pixel values. Binary number has only 0 and 1 pixel, lets have example there can be 500 zero pixels and 200 one pixels. If we draw the histogram plot, the hist blue (default) line bar plot may on the axis itself, please look carefully.

Or

You can use the histogram function, you can do many ways to change the color or width of the hist plot, so that it is easily visualized.

I=imbinarize(rgb2gray(imread('1.jpg')));
[counts,binLocations]=imhist(I,2);
figure, histogram(I);

[Viviana]

Thanks for you help.

I'm just a begginer, using matlab for the first time for my master degree thesis

[KALYAN ACHARJYA]

Welcome to Matlab World!