Why does my histogram go out of its frame?

I draw a histogram from an image using imhist just like this:

subplot(2, 2, 3), imhist(a+50), title("Blob1 lighter hist");

and then when I plot it, the lines are getting out of the frame and I don't know why.

Please someone help me, I really don't understand what is going on with my Matlab program and I don't find anything online.

[Cris LaPierre]

Please save your variables to a mat file and attach the file to your post using the paperclip icon.

[Cris LaPierre]

%% Blobs
figure;
a = imread("blobs1.png");
b = imread("blobs2.png");
c = imread("blobs3.png"); 
d = imread("blobs4.png");

subplot(2, 2, 1), imshow(a), title("Blob1");
subplot(2, 2, 2), imshow(b), title("Blob2");
subplot(2, 2, 3), imshow(c), title("Blob3");
subplot(2, 2, 4), imshow(d), title("Blob4");

figure;
subplot(2, 2, 1), imhist(a), title("Blob1");
subplot(2, 2, 2), imhist(b), title("Blob2");
subplot(2, 2, 3), imhist(c), title("Blob3");
subplot(2, 2, 4), imhist(d), title("Blob4");

disp('Blob1');

Blob1

mean(a(:));
std(double(a(:)));

disp('Blob2');

Blob2

mean(b(:));
std(double(b(:)));

disp('Blob3');

Blob3

mean(c(:));
std(double(c(:)));

disp('Blob4');

Blob4

mean(d(:));
std(double(d(:)));

Answer 1

[Cris LaPierre]

I'm able to reproduce as well. I suggest reporting this here: https://www.mathworks.com/support/contact_us.html

Answer 2

[Cris LaPierre]

I would recommend not using imhist to create your histogram. Instead, use histogram(I) or bar(counts) to visualize.

B1 = imread('blobs1.png');

figure
histogram(B1,'BinWidth',1)
xlim([0,255])

figure
counts = imhist(B1);
bar(counts)

Answer 3

[Image Analyst]

I am not able to reproduce in either R2022b or R2023a. It looks perfectly fine. I'd call tech support. Maybe try a different renderer with opengl

[Cris LaPierre]

It will depend on your graphics card.