ImageSize bug in Rasterize

Question

Bug introduced in 8 or earlier and persisting through 11.3.0

In version 11.0.0 I am getting incorrect sizes from Rasterize.
The problem remains in 11.0.1
Rasterize["hi", "Image", ImageSize -> {100, 100}] // ImageDimensions
(* {100, 102} *)

Rasterize["hi", "Graphics", ImageSize -> {100, 100}] // First // First // Dimensions
(* {102, 100, 3} *)

Rasterize["hi", "RasterSize", ImageSize -> {100, 100}]
(* {96, 102} *)

Can anyone confirm this?
I am using Windows 10.

Simon Woods · Answer

According to the documentation the correct option to set the coarseness of the rasterization is RasterSize, whereas ImageSize only controls the size at which the image is displayed.
I'm not sure why I was using ImageSize previously, possibly RasterSize did not behave as advertised in an earlier version, or perhaps I didn't read the documentation carefully enough.
Anyway, in 12.2 everything appears to work as expected:
image = Rasterize["hi", "Image", 
   RasterSize -> {100, 100}, ImageSize -> {50, 50}];

(* displayed size *)
ImageSize /. Options[image]
(* {50, 50} *)

(* actual number of pixels in ImageData *)
ImageDimensions[image]
(* {100, 100} *)

ImageSize bug in Rasterize

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