How to get appropriate scaled image from graphic rectangle

Question

I am trying to make an image out of a graphic, which is a rectangle with given size.

However, the dimension of the image do not correspond to the size given to the rectangle:

im = Image[Graphics[Rectangle[{0, 0}, {10, 20}]]];
ImageDimensions[im]

{221, 432}

Anyone knows how to do it ?

Answer 1

Not very beautiful, but working:

 im = ImageResize[Image[Graphics[Rectangle[{0, 0}]]], {10, 20}];

Answer 2

im = Image[Graphics[Rectangle[{0, 0}, {10, 20}]], ImageSize -> {10, 20}]; (* or *)
im = Image[Graphics[Rectangle[{0, 0}, {10, 20}], ImageSize -> {10, 20}]];

ImageDimensions[im]

{10, 20}