face-api/src/ops/index.ts

export * from './iou';
export * from './minBbox';
export * from './nonMaxSuppression';
export * from './normalize';
export * from './padToSquare';
export * from './shuffleArray';

export function sigmoid(x: number) {
  return 1 / (1 + Math.exp(-x));
}

export function inverseSigmoid(x: number) {
  return Math.log(x / (1 - x));
}