How to multiply every pixels?

I need to find the product of every all the pixel values in a matrix. That is, if an image of size 256×256×3 is taken... i need to find the entire product of 65536 values

[Matt J]

There are 196608 values in a 256×256×3 image.

[Matt J]

You have many open threads, i.e., answers to your questions that you have not accepted. You are more likely to get responses if you Accept-click the answers that helped you.

[Sneha P S]

Ok

[Sneha P S]

Sorry i just meant to mention the matrix of size 256×256. Will anyone help me to do the same

Answer 1

[Rik]

You can use prod.

A=rand(256,256);
total_product=prod(A(:));

But it is very likely that the product will be either 0, inf or -inf, because of the large number of elements.

[Matt J]

But it is very likely that the product will be either 0, inf or -inf, because of the large number of elements.

@Sneha, Is the ulterior motive to compute the log-product? If so, better to do this by summation.

logproduct=sum(log(A(:)));