/**
 * Merges an alpha mask with existing RGBA image data.
 * This function updates the alpha (transparency) channel of the original
 * pixel data using values from the provided alpha mask.
 *
 * @param originalPixels - The RGBA pixel data of the source image.
 * @param alphaMaskData - The pixel data from the segmentation mask, representing new alpha values.
 * @returns A new Uint8ClampedArray with the original RGB values and updated alpha values.
 */
export declare function applyAlphaMask(originalPixels: Uint8Array | Uint8ClampedArray, alphaMaskData: Uint8Array | Uint8ClampedArray): Uint8Array | Uint8ClampedArray;
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