Double-exposure composite

Contours, highlights, and shadows from two images overlap transparently in the same areas.

Visual traits

• two layered images
• transparent contours
• shared tones

Expected changes

• Two elements are more likely to appear layered
• Contours and tones are more likely to be shared

Definition

Double-exposure composite layers two images in one frame so contours, highlights, shadows, or textures visibly interpenetrate. It does not determine an actual in-camera multiple exposure, subject meaning, particular photographic equipment, or narrative.

In more detail

The key is that two elements share form or tone in the same areas rather than appearing fully separate. It is distinct from simple side-by-side placement, whole-image color adjustment, and blur in one image.

Includes

• Frames where two images share contours or tones through overlap
• Composites showing two elements through transparent layering

Excludes

• Collage that merely places elements separately
• Specification of actual in-camera exposure
• Processing that only shapes whole-image color

What this does not imply

• Actual multiple-exposure capture
• A particular camera or lens
• A particular subject
• narrative
• or color design

Variability

Amount of overlap, transparency, and relative placement can be adjusted while both elements remain legible.

Usage

• Specify the two layered images separately when needed
• Keep overlap readable enough for both contours

Distinguish similar expressions

• Use image compositing when elements are placed separately

Typical uses

• Layer another scene within a figure's contour
• Show a relation between two forms or textures in one frame

Possible failure modes

• The images mix so much that neither is legible
• The elements remain completely separate and no overlap is conveyed