Suggestions for images sources that are mostly black

Hello! I'm attempting to use Hyperion with MAME, specifically the game Tempest.

Tempest was a vector graphics game, so the majority of the screen is black. The actual color vector lines for any given scene in the game take up only a small percentage of the screen. This results in very few (almost zero!) of the LEDs emitting light during gameplay.

I'm wondering if there are any software adjustments I can make in Hyperion that will be "more aggressive" or exaggerate the color output for this use case.

Here's an example screenshot: https://www.arcade-history.com/images/game/2865_2.png

Thanks!