Contrast

Overview

Contrast node scales pixel intensity differences around the midpoint of the input frame, making bright areas brighter and dark areas darker (or vice versa).

Use this node to make features more visually distinct before passing frames to detection, OCR, or color-analysis nodes.

Input

Input Image

image required

The image frame to adjust. Connect this to a camera or upstream processing output.

Contrast

number required

Multiplier applied to the deviation of each pixel value from the midpoint. Controls how strongly the adjustment expands or compresses the tonal range.

Range: 0.0 to 2.0
Default: 1.0

• 1.0 — no change.
• Values below 1.0 compress the tonal range, making the image look flat and grey.
• Values above 1.0 expand the tonal range, making details more distinct at the risk of clipping highlights and shadows.

Output

Frame Out

image

Contrast-adjusted image.