interface DecodedImageResult {
    imageBuffer: Buffer;
    width: number;
    height: number;
    format?: string;
}
export declare function decodeImage(input: string | Buffer): Promise<DecodedImageResult>;
export declare function encodePng(imageBuffer: Buffer, width: number, height: number): Promise<Buffer>;
export declare function resizePngInsideSquare(input: string | Buffer, size: number): Promise<Buffer>;
export declare function writePngFile(outputPath: string, imageBuffer: Buffer, width: number, height: number): Promise<void>;
export {};