import type { DecodedImage } from './mask.js';
/** The columns where any of `rows` differs from its own leftmost pixel: where it holds something. */
export declare function inkOf(rows: readonly (readonly [DecodedImage, number])[]): [number, number] | undefined;
/**
 * Whether row `y` holds anything between columns `from` and `to`: more than a
 * border's worth of pixels unlike the colour most of that stretch is.
 */
export declare function inked(image: DecodedImage, y: number, from: number, to: number): boolean;
/**
 * Whether row `y` runs through text between columns `from` and `to`. A row
 * across a code block or a card changes colour only at the box's edges; one
 * through a line of text changes at every stroke.
 */
export declare function texted(image: DecodedImage, y: number, from: number, to: number): boolean;
/**
 * Whether row `y` is spacing between rows `above` and `below`: all one colour,
 * the colour those rows are mostly. A row of another colour is a rule across
 * the page, and content.
 */
export declare function spacingRow(image: DecodedImage, y: number, above: number, below: number): boolean;
/**
 * Columns `from` to `to` moved out to the space before and after the word at
 * each edge on `rows`: a region starts at the first pixel that differs, which
 * is often inside a word. An edge with no space within `reach` stays put.
 */
export declare function blankColumns(image: DecodedImage, rows: readonly number[], from: number, to: number, reach: number): [number, number];
//# sourceMappingURL=change-ink.d.ts.map