Inverting a digital image on an Android device refers to reversing the color values of each pixel. For example, a dark area in the original image becomes light, and vice versa. This process essentially creates a negative version of the picture, where the brightest points become the darkest, and colors are transformed to their complementary hues on the color wheel.
The significance of this function lies in its utility for a variety of purposes. It can be employed for artistic effect, to highlight specific details in a photo, or to improve visibility in certain viewing conditions. Historically, image inversion techniques were essential in photography for creating positive prints from film negatives, a process now largely replicated digitally.