/** 把数据变成图片 */
export declare function imageEmbed(blob: Blob): void;
/**
 * 把任意数据转化为像素数据（为了高宽比，会填充 0）
 */
export declare function imageEmbedBufferWrite(buffer: ArrayBuffer, options?: Partial<IImageEmbedBufferOptions>): IImageData;
/** 把 bit 对组合成字节 */
export declare function buffer2dbits(buffer: ArrayBuffer): number[];
/** 把字节分割为 bit 对 */
export declare function dbits2buffer(dbits: number[]): ArrayBuffer;
/** bit 对按字节填充数据，一个字节 4 dbit，指定有效 bit 对数，剩下的填充 0
 * @param dbit 有效 bit 对数 */
export declare function dbitsFill(dbits: number[], dbit?: number): number[];
/** 提取填充过的 bit 对中的有效  bit 对
 * @param dbit 有效 bit 对数 */
export declare function dbitsUnFill(dbits: number[], dbit?: number): number[];
export interface IImageEmbedBufferOptions {
    width: number;
    blockSize: number;
}
export interface IImageData {
    data: Uint8ClampedArray;
    height: number;
    width: number;
}
export declare function imageDataScale(imageData: IImageData, sacle?: number): {
    data: Uint8ClampedArray<ArrayBuffer>;
    height: number;
    width: number;
};
export declare function imageDataUnScale(imageData: IImageData, sacle?: number): {
    data: Uint8ClampedArray<ArrayBuffer>;
    height: number;
    width: number;
};
export declare function dataAddAlpha(data: Uint8ClampedArray, value?: number): Uint8ClampedArray<ArrayBuffer>;
export declare function dataRemoveAlpha(data: Uint8ClampedArray, value?: number): Uint8ClampedArray<ArrayBuffer>;
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