Akvis Enhancer is a plug-in for most popular image editors which corrects underexposed or overexposed photographs without any manipulation of the photo's exposure settings. Instead, the program alters the level of colour transition within an image.

It couldn't be easier to use, with only three sliding bars to manipulate and a real-time preview of the altered image on display at all times.

Use the Level of Detail slider, numbered from 0 to 100, to improve the contrast between light and dark areas. Prioritise between the highlights and shadows with the second slider to determine which details should be made more visible.

Finally, use the Intensity slider to determine the overall effect of the two parameters above.

That's all there is to it. The results are pretty impressive, and certainly better than most people could achieve via manual manipulation.