public static void DeleteGrayscaleImg(string path, float thresh, bool invert)
{
MagickImage img = IOUtils.ReadImage(path);
if (img == null)
{
return;
}
img.ColorSpace = ColorSpace.HSL;
float saturation = 100f;
using (IMagickImage channel = img.Separate(Channels.Gray).First())
{
saturation = channel.FormatExpression("%[fx:mean]").GetFloat();
Logger.Log("Image Saturation: " + saturation.ToString("0.00"));
}
if (!invert && saturation < thresh)
{
Logger.Log("Deleting " + Path.GetFileName(path));
File.Delete(path);
}
if (invert && saturation > thresh)
{
Logger.Log("Deleting " + Path.GetFileName(path));
File.Delete(path);
}
}
public static bool CheckGrayscale(this MagickImage i)
{
using (MagickImage image = i)
{
// -colorspace HSL
image.ColorSpace = ColorSpace.HSL;
// -channel g -separate +channel
string r;
using (IMagickImage channel = image.Separate(Channels.Gray).First())
{
// -format "%[fx:mean]"
r = channel.FormatExpression("%[fx:mean]");
}
return(double.Parse(r, NumberStyles.Any, CultureInfo.InvariantCulture) < 1e-10);
}
}