Positiivinen ja negatiivinen tila kuvassa

"The deeper you go into photography, the clearer it will be that everything is about emotion. Each decision you make – every single part of your thought process — matters for that one reason. A prominent example? Positive and negative space. These two elements of photography are important because of the emotions they carry." 
www.photographylife.com

Positive space refers to the main focus of the image. Negative space is the space that surrounds and supports the interest point of the image.

YouTube: Art of photography, Positive and negative space in photography: