compute method
Implementation
@override
double compute(img.Image image) {
// Frequency-based sharpness calculation
double frequencySharpness = _computeFrequencySharpness(image);
// High-frequency content-based sharpness calculation
double highFrequencySharpness = _computeHighFrequencySharpness(image);
// Combine the two metrics (you can choose how to combine them)
return (frequencySharpness + highFrequencySharpness) / 2;
}