mirror of
https://github.com/visioncortex/vtracer.git
synced 2026-09-05 20:01:37 -07:00
Chris Tsang
a350e2532a
BinaryFrontend gains a Threshold enum: Fixed(u8) (now tunable, was
hardcoded to 128) and Adaptive { window, t } — Bradley–Roth adaptive
thresholding computed via visioncortex's SummedAreaTable, O(pixels)
regardless of window size, for images with uneven lighting. Both use a
shared (r+g+b)/3 intensity so they agree on "dark"; the grayscale
checker_bw golden is unaffected.
Exposed through Config and all bindings: CLI (--threshold, --adaptive,
--adaptive-window, --adaptive-t), Python (constructor kwargs + getters/
setters), and the Node package (binaryThreshold, adaptive, adaptiveWindow,
adaptiveT). Adds tests covering fixed tunability and adaptive recovering
locally-dark marks under a brightness gradient that a global cutoff can't.
43 lines
1.8 KiB
TypeScript
43 lines
1.8 KiB
TypeScript
/** Conversion options. Any field may be omitted; omitted fields use the framework default. */
|
||
export interface Options {
|
||
/** Applied before other fields: "bw" | "poster" | "photo". */
|
||
preset?: 'bw' | 'poster' | 'photo';
|
||
colorMode?: 'color' | 'bw';
|
||
hierarchical?: 'stacked' | 'cutout';
|
||
mode?: 'pixel' | 'polygon' | 'spline';
|
||
filterSpeckle?: number;
|
||
colorPrecision?: number;
|
||
layerDifference?: number;
|
||
cornerThreshold?: number;
|
||
lengthThreshold?: number;
|
||
maxIterations?: number;
|
||
spliceThreshold?: number;
|
||
pathPrecision?: number;
|
||
/** Fixed palette: `#rrggbb` strings. */
|
||
palette?: string[];
|
||
/** Auto-quantize target color count. */
|
||
maxColors?: number;
|
||
/** 0 = off, 1 = quantize+simplify, 2 = + shorthands/grouping. */
|
||
optimize?: number;
|
||
/** Binary mode (`colorMode: 'bw'`): fixed threshold 0..=255; foreground when intensity is below it. */
|
||
binaryThreshold?: number;
|
||
/** Binary mode: use Bradley–Roth adaptive thresholding (handles uneven lighting). */
|
||
adaptive?: boolean;
|
||
/** Adaptive window side length in px; 0 = auto (~1/8 of the shorter side). */
|
||
adaptiveWindow?: number;
|
||
/** Adaptive sensitivity: percent below the local mean (default 15). */
|
||
adaptiveT?: number;
|
||
}
|
||
|
||
/** Vectorize an encoded image (PNG/JPEG/GIF/BMP) buffer to an SVG string. */
|
||
export function convertBuffer(buffer: Uint8Array, options?: Options): string;
|
||
|
||
/** Vectorize a raw RGBA8 buffer (`width * height * 4` bytes) to an SVG string. */
|
||
export function convertPixels(rgba: Uint8Array, width: number, height: number, options?: Options): string;
|
||
|
||
/** Read an image file, vectorize it, and write the SVG to disk. */
|
||
export function convertFile(inputPath: string, outputPath: string, options?: Options): Promise<void>;
|
||
|
||
/** Synchronous {@link convertFile}. */
|
||
export function convertFileSync(inputPath: string, outputPath: string, options?: Options): void;
|