/// <summary>
/// Applies binarization to the image splitting the pixels at the given threshold.
/// </summary>
/// <param name="source">The image this method extends.</param>
/// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
/// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
/// <param name="lowerColor">The color to use for pixels that are below the threshold</param>
/// <param name="colorComponent">The color component to be compared to threshold.</param>
/// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
public static IImageProcessingContext BinaryThreshold(
this IImageProcessingContext source,
float threshold,
Color upperColor,
Color lowerColor,
BinaryThresholdColorComponent colorComponent)
=> source.ApplyProcessor(new BinaryThresholdProcessor(threshold, upperColor, lowerColor, colorComponent));
/// <summary>
/// Initializes a new instance of the <see cref="BinaryThresholdProcessor"/> class.
/// </summary>
/// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
/// <param name="upperColor">The color to use for pixels that are above the threshold.</param>
/// <param name="lowerColor">The color to use for pixels that are below the threshold.</param>
/// <param name="colorComponent">The color component to be compared to threshold.</param>
public BinaryThresholdProcessor(float threshold, Color upperColor, Color lowerColor, BinaryThresholdColorComponent colorComponent)
{
Guard.MustBeBetweenOrEqualTo(threshold, 0, 1, nameof(threshold));
this.Threshold = threshold;
this.UpperColor = upperColor;
this.LowerColor = lowerColor;
this.ColorComponent = colorComponent;
}
/// <summary>
/// Initializes a new instance of the <see cref="BinaryThresholdProcessor"/> class.
/// </summary>
/// <param name="threshold">The threshold to split the image. Must be between 0 and 1.</param>
/// <param name="colorComponent">The color component to be compared to threshold.</param>
public BinaryThresholdProcessor(float threshold, BinaryThresholdColorComponent colorComponent)
: this(threshold, Color.White, Color.Black, colorComponent)
{
}
/// <summary>
/// Applies binarization to the image splitting the pixels at the given threshold.
/// </summary>
/// <param name="source">The image this method extends.</param>
/// <param name="threshold">The threshold to apply binarization of the image. Must be between 0 and 1.</param>
/// <param name="colorComponent">The color component to be compared to threshold.</param>
/// <param name="rectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to alter.
/// </param>
/// <returns>The <see cref="IImageProcessingContext"/> to allow chaining of operations.</returns>
public static IImageProcessingContext BinaryThreshold(
this IImageProcessingContext source,
float threshold,
BinaryThresholdColorComponent colorComponent,
Rectangle rectangle)
=> source.ApplyProcessor(new BinaryThresholdProcessor(threshold, colorComponent), rectangle);
