What photography technique enhances user perception of depth in an image?

Framing the subject is an effective technique for enhancing the perception of depth in an image. By surrounding the main subject with elements in the foreground, midground, or background, framing helps to create layers in the composition. This layered approach can lead the viewer's eye through the photograph, making it feel more three-dimensional. Additionally, using elements from the environment to frame a subject can provide context and emphasize the subject's relation to its surroundings, further enhancing the sense of depth.

In contrast, applying filters primarily alters the color and mood of the image rather than affecting depth perception directly. The rule of thirds is a compositional guideline that aids in balancing an image but doesn't inherently create a sense of depth. Modifying contrast levels can affect the overall visual impact of an image, but it doesn't specifically enhance depth; rather, it can impact the perception of lighting and texture.