export interface TestPatternConfig {
    width: number;
    height: number;
    backgroundColor?: string;
    textColor?: string;
    fontSize?: number;
    includeGrid?: boolean;
    includeTimestamp?: boolean;
    displayIndex?: number;
}
export declare class TestPatternGenerator {
    /**
     * Generate a test pattern with numbers in each quadrant and center
     */
    static generateQuadrantPattern(config: TestPatternConfig): Promise<Buffer>;
    /**
     * Generate a complex test pattern with multiple text regions
     */
    static generateComplexPattern(config: TestPatternConfig): Promise<Buffer>;
    /**
     * Generate grid lines for the pattern
     */
    private static generateGrid;
    /**
     * Save test pattern to file
     */
    static savePattern(buffer: Buffer, filename: string): Promise<string>;
    /**
     * Generate patterns for all displays
     */
    static generatePatternsForAllDisplays(displayCount: number): Promise<Map<number, Buffer>>;
    /**
     * Verify OCR results match expected quadrant numbers
     */
    static verifyQuadrantNumbers(ocrText: string): {
        success: boolean;
        foundNumbers: number[];
        missingNumbers: number[];
    };
}