/**
 * Digital-zoom scan regions for distant / small barcodes.
 * Used by the pure-JS @zxing multi-pass decoder.
 */
export interface ScanPass {
    readonly sx: number;
    readonly sy: number;
    readonly sw: number;
    readonly sh: number;
    /** Upscale factor when drawing the crop into the decode canvas. */
    readonly scale: number;
}
/**
 * Full frame + center zooms + mid-band (1D) + four corner crops + optional tight center.
 * Covers off-center / distant codes that are not in the viewfinder center.
 *
 * CPU bound: at most 10 passes (1 full + 3 center + 1 mid-band + 4 corners + 1 tight center).
 * Do not add more regions without raising this documented ceiling (~10–12 max).
 */
/** Full-frame only — cheap first pass (~1 crop per tick; G9 CPU bound). */
export declare function buildQuickScanPass(videoWidth: number, videoHeight: number): ScanPass[];
export declare function buildMaxSensitivityScanPasses(videoWidth: number, videoHeight: number): ScanPass[];
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