I simply want to insert a jpg file in a page. Moreover I want the height of the image to fit exactly the height of the page, and the width of the image to be precisely centered in the page.
When I put
\includegraphics{my_image.jpg}
the image is inserted with a left and a top margin, regardless the scaling values (always the same margins for all scaling values of the image).
I don't want to use \includepdf because when I convert my jpg file into pdf file there is big loss of quality.
How can I get my image inserted as I want?