/**
 * algorithm proposed by Borgefors, Chamfer distance [J. ACM 15 (1968) 600, Comput. Vis. Graph. Image Process. 34 (1986) 344], h
 * @param {Sampler2D} source
 * @param {Sampler2D} distanceField
 * @param {number} emptyValue
 * @param {number} d1 distance between two adjacent pixels in either x or y direction
 * @param {number} d2 distance between two diagonally adjacent pixels
 * @param {number} maxD highest value that distance field can hold
 */
export function computeUnsignedDistanceField_Chamfer(source: Sampler2D, distanceField: Sampler2D, emptyValue: number, d1: number, d2: number, maxD: number): void;
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