analyzeLight static method

LightAnalysis analyzeLight(Uint8List imageBytes)

Analyzes ambient light conditions from frame luminance.

Implementation

static LightAnalysis analyzeLight(Uint8List imageBytes) {
  if (imageBytes.isEmpty) {
    return const LightAnalysis(
      condition: LightCondition.tooLow,
      averageLuminance: 0.0,
      estimatedLux: 0.0,
      torchRecommended: true,
    );
  }

  // Calculate average luminance
  double totalLuminance = 0;
  for (int i = 0; i < imageBytes.length; i++) {
    totalLuminance += imageBytes[i];
  }
  final avgLuminance = totalLuminance / imageBytes.length / 255.0;

  // Estimate lux from normalized luminance (rough approximation)
  final estimatedLux = avgLuminance * 1000.0;

  final LightCondition condition;
  final bool torchRecommended;

  if (avgLuminance < 0.08) {
    condition = LightCondition.tooLow;
    torchRecommended = true;
  } else if (avgLuminance < 0.20) {
    condition = LightCondition.low;
    torchRecommended = true;
  } else if (avgLuminance < 0.70) {
    condition = LightCondition.normal;
    torchRecommended = false;
  } else if (avgLuminance < 0.90) {
    condition = LightCondition.bright;
    torchRecommended = false;
  } else {
    condition = LightCondition.overexposed;
    torchRecommended = false;
  }

  return LightAnalysis(
    condition: condition,
    averageLuminance: avgLuminance,
    estimatedLux: estimatedLux,
    torchRecommended: torchRecommended,
  );
}