Trying to reduce the size of an image

Hello, I am trying to reduce the size of the pixel. Below are the steps that I did 1. Calculate the number of pixel. 2. Now I was thinking if I decrease the pixel then I the size of the image will also get decrease but I was wrong.

Please guide how to decrease of the size of the image without resizing it.

Answer 1

[Thorsten]

You can write the image to jpg and adjust the 'Quality' between 0 and 100 to reduce the size (lossy compression):

imwrite(I, 'myimage.jpg', 'Quality', 50)

or you could try one of the various image formats supported by imwrite and see if the size is smaller.