import type { DebuggingOptions, DetectionOptions } from "../interface.js";
import type { CoreCanvas, PlatformProvider } from "./platform.js";
/**
 * Service for calculating the skew angle of an image containing text.
 */
export declare class BaseDeskewService {
    protected readonly options: DetectionOptions;
    protected readonly debugging: DebuggingOptions;
    protected readonly platform: PlatformProvider;
    constructor(platform: PlatformProvider, options?: Partial<DetectionOptions>, debugging?: Partial<DebuggingOptions>);
    protected log(message: string): void;
    /**
     * Runs a lightweight detection pass to determine the average text skew angle.
     * Uses multiple methods to robustly calculate skew from all detected text regions.
     * @param probabilityMapCanvas - The canvas containing the probability map of text regions.
     * @returns The calculated skew angle in degrees.
     */
    calculateSkewAngle(probabilityMapCanvas: CoreCanvas): Promise<number>;
    private calculateMinRectAngles;
    private calculateBaselineAngles;
    private calculateHoughAngles;
    private calculateLineAngle;
    private calculateConsensusAngle;
}