DistanceField

The DistanceField class provides an implementation for computing a distance field representation of an image. The distance field calculation is achieved via mechanisms like thresholding, contour tracing, and jump flooding. This class can operate on a single source image and produce a single target image.

The distance field process involves:

• Applying a threshold filter to the source image to create a binary image representation.

• Computing the contours of the binary representation.

• Using a jump flooding algorithm to compute distances from each pixel to the nearest contour point.

• Optionally utilizing signed distances by distinguishing between pixels inside and outside the contour.

The class uses several configurable parameters and intermediate processing steps:

• threshold: Controls the binary threshold level used in the threshold filter.

• distanceScale: Scales the computed distance field values.

• signedDistance: Indicates whether the distance field should contain signed or unsigned distances.

Internal optimizations include resizing the input to power-of-two dimensions for efficient processing, and reusing intermediate buffers to reduce memory allocation overhead.