Count of total pixels and dimensions(rows and columns) of a picture?

How do I obtain the number of pixels and the dimensions of this picture?

Answer 1

[Davide Masiello]

grayImage = imread('retina.jpg');
numberOfPixels = numel(grayImage)

numberOfPixels = 1879445

[rows,cols] = size(grayImage)

rows = 1357

cols = 1385

[Mara Pereira]

thank u!!

[Image Analyst]

image is a built-in function. It's best to choose another name, like grayImage.

[Davide Masiello]

@Image Analyst thanks! I changed it.