computeAdaptiveThreshold function

int computeAdaptiveThreshold(
  1. Uint8List pixels,
  2. int width,
  3. int height
)

Computes an adaptive threshold for converting a grayscale image to black and white.

This function takes a list of grayscale pixel values and computes a threshold value that can be used to convert the image to a black and white representation. The threshold is computed by taking the average of all the pixel values and subtracting 100 from it. This helps to create a sharper separation between the foreground and background.

Parameters:

  • pixels: A list of grayscale pixel values.
  • width: The width of the image in pixels.
  • height: The height of the image in pixels.

Returns: The computed adaptive threshold value. Compute adaptive threshold dynamically

Implementation

// Compute adaptive threshold dynamically
int computeAdaptiveThreshold(Uint8List pixels, int width, int height) {
  int sum = 0, count = 0;
  for (int i = 0; i < pixels.length; i += 4) {
    sum += pixels[i];
    count++;
  }

  // Adjust threshold for sharper separation
  return (sum ~/ count) - 90;
}