Scenario: I include a jpeg file in a LaTeX-generated pdf. When the pdf is displayed at 100% size, the image is shown properly. However, pdfs at their "natural" size are usually rather smaller. The problem is when I "zoom to fit width" for example, the image will always get "pixelated", lacking a better term. I can ameliorate the problem by having the image scaled down, but this does not seem a proper fix. Is there a way to specify the size of the pdf for which the image should be shown at its original size?
As I write this, I realise that this question may not even make sense, because the same pdf file, displayed at its original size, in the same computer, with okular and evince, results texts of different sizes! Not only the font size, but also the image! Moreover, when shown in okular at its original size, the image in the pdf has the same size as the original image. In evince however, it is bigger (indeed all both the text and the image are bigger) -- even though the document is also being shown at its original size!
Does this make any sense? Where am I going astray in my reasoning?