sz means in image segmentation

img=zeros(sz(1),sz(2));

can someone help me explain about this code?

[Erivelton Gualter]

what is sz meaning?

Here is a documentation for function zeros: https://www.mathworks.com/help/matlab/ref/zeros.html

[nur hanani]

sz is size, but sz(1) is it size 1 or what?

Answer 1

[Erivelton Gualter]

Let's say you have size = [300 400]. So, img is a matrix of zeros with this size. than you might show.

Try the following code:

sz = [300 400];
img=zeros(sz(1),sz(2));
imshow(img)

Answer 2

[Image Analyst]

Before that code, someone probably did

sz = size(yourImage);

[nur hanani]

so 1 is my image name? but i dont have any image named 1.