processFrame static method

PreprocessingResult processFrame(Uint8List rawBytes, int width, int height, { double blurThreshold = 80.0, bool applyBinarization = false, })

Preprocesses a raw image frame and returns a comprehensive PreprocessingResult.

Implementation

static PreprocessingResult processFrame(
  Uint8List rawBytes,
  int width,
  int height, {
  double blurThreshold = 80.0,
  bool applyBinarization = false,
}) {
  final gray = toGrayscale(rawBytes, width, height);
  final blurScore = computeBlurScore(gray, width, height);
  final lumaData = computeLuminosityAndContrast(gray, width, height);

  final luma = lumaData['luminosity'] ?? 0.5;
  final contrast = lumaData['contrast'] ?? 0.5;

  final isBlurry = blurScore < blurThreshold;
  final isLowLight = luma < 0.22;
  final isOverexposed = luma > 0.88;

  Uint8List finalBytes = gray;
  if (applyBinarization) {
    finalBytes = sauvolaBinarize(gray, width, height);
  }

  return PreprocessingResult(
    bytes: finalBytes,
    width: width,
    height: height,
    blurScore: blurScore,
    isBlurry: isBlurry,
    luminosity: luma,
    contrastScore: contrast,
    isLowLight: isLowLight,
    isOverexposed: isOverexposed,
  );
}