You can use some PHP code to create such a filter. It may look like this:
$images = [
1 => 'alpha.png',
2 => 'beta.png',
3 => 'gamma.png'
];
$selection = value('ZS01');
$image = $images[$selection]; // Make sure that the selection is always 1, 2 or 3
html('<img src="'.$image.'" alt="">');