public string Execute(FileItem item, string infile, string dest, ValuePairEnumerator configData)
{
var conf = new EnhanceViewModel(configData);
dest = Path.Combine(Path.GetDirectoryName(dest), Path.GetFileNameWithoutExtension(dest) + ".jpg");
using (MagickImage image = new MagickImage(infile))
{
if (conf.Normalize)
image.Normalize();
if (conf.AutoGamma)
image.AutoGamma();
image.BrightnessContrast(new Percentage(conf.Brightness), new Percentage(conf.Contrast));
if (conf.SContrast > 0)
image.SigmoidalContrast(true, conf.SContrast);
if (conf.Edge)
image.AdaptiveSharpen();
if (conf.Sharpen > 0)
image.UnsharpMask(1.5, 1.5, conf.Sharpen/100.0, 0.2);
image.Format = MagickFormat.Jpeg;
image.Write(dest);
}
return dest;
}
private void ExecuteSigmoidalContrast(XmlElement element, MagickImage image)
{
Hashtable arguments = new Hashtable();
foreach (XmlAttribute attribute in element.Attributes)
{
if (attribute.Name == "contrast")
arguments["contrast"] = Variables.GetValue<double>(attribute);
else if (attribute.Name == "midpoint")
arguments["midpoint"] = Variables.GetValue<double>(attribute);
else if (attribute.Name == "sharpen")
arguments["sharpen"] = Variables.GetValue<Boolean>(attribute);
}
if (OnlyContains(arguments, "contrast"))
image.SigmoidalContrast((double)arguments["contrast"]);
else if (OnlyContains(arguments, "contrast", "midpoint"))
image.SigmoidalContrast((double)arguments["contrast"], (double)arguments["midpoint"]);
else if (OnlyContains(arguments, "sharpen", "contrast"))
image.SigmoidalContrast((Boolean)arguments["sharpen"], (double)arguments["contrast"]);
else if (OnlyContains(arguments, "sharpen", "contrast", "midpoint"))
image.SigmoidalContrast((Boolean)arguments["sharpen"], (double)arguments["contrast"], (double)arguments["midpoint"]);
else
throw new ArgumentException("Invalid argument combination for 'sigmoidalContrast', allowed combinations are: [contrast] [contrast, midpoint] [sharpen, contrast] [sharpen, contrast, midpoint]");
}
public void Test_SigmoidalContrast()
{
using (MagickImage image = new MagickImage(Files.NoisePNG))
{
image.SigmoidalContrast(true, 8.0);
using (MagickImage original = new MagickImage(Files.NoisePNG))
{
Assert.AreEqual(0.07361, original.Compare(image, ErrorMetric.RootMeanSquared), 0.00001);
}
}
}
