Yes, adjustment of whitepoint/blackpoint could remove some fog. I dont know what software you use. I use Lightroom and for fog reduction I mainly use the Whites and Blacks sliders, and also overall Contrast and the Clarity slider. Play around with them if you use LR.

If you use Photoshop (or some other software), you could begin with adjusting levels - drag whitepoint and blackpoint inwards to the histogram.