Enhance

Spatio Temporal Retinex-like Envelope with Stochastic Sampling

gegl:stress

Spatio Temporal Retinex-like Envelope with Stochastic Sampling.

Operation pads

This operation exposes the following data pads, defining how it receives, processes, and emits image data:

Input

Output

Operation properties

Radius

gint

Neighborhood taken into account, for enhancement ideal values are close to the longest side of the image, increasing this increases the runtime.
Default 300
Value range 2 • • 6000.

Samples

gint

Number of samples to do per iteration looking for the range of colors.
Default 5
Value range 2 • • 500.

Iterations

gint

Number of iterations, a higher number of iterations provides a less noisy rendering at a computational cost.
Default 5
Value range 1 • • 1000.

Enhance Shadows

gboolean

When enabled also enhances shadow regions - when disabled a more natural result is yielded.
Default false

Symmetric Nearest Neighbor

Noise reducing edge preserving blur filter based on Symmetric Nearest Neighbors.

Sharpen (Unsharp Mask)

Sharpen image, by adding difference to blurred image, a technique for sharpening originally used in darkrooms.