private static double GetRatio(IMagickImage image, Channels channel, IMagickImage mask, double maskMean)
{
using (IMagickImage channelImage = image.Separate(channel).First())
{
channelImage.Composite(mask, CompositeOperator.Multiply);
var channelMean = GetMean(channelImage);
var average = 100 * channelMean / maskMean;
return(100 / average);
}
}
/// <summary>
/// Performs a circular crop on an image.
/// </summary>
/// <param name="image">The image to crop.</param>
internal static void CircularCrop(IMagickImage image)
{
using var copy = image.Clone();
copy.Distort(DistortMethod.DePolar, 0);
copy.VirtualPixelMethod = VirtualPixelMethod.HorizontalTile;
copy.BackgroundColor = MagickColors.None;
copy.Distort(DistortMethod.Polar, 0);
image.Composite(copy, CompositeOperator.CopyAlpha);
}
static public void RoundImage(this IMagickImage <byte> image)
{
using var mask = new MagickImage(MagickColors.Transparent, image.Width, image.Height);
new Drawables()
.FillColor(MagickColors.White)
.Circle(image.Width / 2, image.Height / 2, image.Width / 2, 0)
.Draw(mask);
image.Alpha(AlphaOption.On);
image.Composite(mask, CompositeOperator.Multiply);
}
public void CastShadow(IMagickImage caster, int offsetX, int offsetY, double size, Percentage alpha, MagickColor color, bool extendCasterWithBorder = true)
{
using (IMagickImage shadow = caster.Clone())
{
shadow.Shadow(offsetX, offsetY, size, alpha, color);
if (extendCasterWithBorder)
{
caster.BorderColor = MagickColors.Transparent;
caster.Border((int)size);
}
caster.Composite(shadow, 0, 0, CompositeOperator.DstOver);
}
}
public void BlurBoxes(BBOXES boxes)
{
foreach (var rect in boxes.ToMagikGeometry())
{
if (rect.X >= 0 && rect.Y >= 0 && rect.Width > 0 && rect.Height > 0)
{
using (var crop_clone = new MagickImage(_current.ToByteArray()))
{
crop_clone.Crop(rect);
crop_clone.Blur();
_current.Composite(crop_clone, rect.X, rect.Y, CompositeOperator.Over);
}
}
}
}
public Stream Compare()
{
IMagickImage modifiedHigh = ReadPDF(_modifiedImagePath, _magickSettingsHigh);
IMagickImage original = ReadPDF(_originalImagePath, _magickSettings);
IMagickImage modified = ReadPDF(_modifiedImagePath, _magickSettings);
IMagickImage mask = GenerateMask(original, modified);
mask.Resize(new Percentage((double)Density / (double)ReducedDensity * 100d));
modifiedHigh.Composite(mask, Gravity.Center, CompositeOperator.Over);
MemoryStream ms = new MemoryStream();
modifiedHigh.Write(ms);
ms.Position = 0;
return(ms);
}
private void AddBevel(IMagickImage image)
{
using (var alphaTexture = image.Clone())
{
alphaTexture.Alpha(AlphaOption.Extract);
alphaTexture.Blur(0, Bevel);
alphaTexture.Shade(Azimuth, Elevation);
alphaTexture.Composite(image, CompositeOperator.CopyAlpha);
alphaTexture.Alpha(AlphaOption.On);
alphaTexture.Alpha(AlphaOption.Background);
alphaTexture.Alpha(AlphaOption.Deactivate);
alphaTexture.AutoLevel(Channels.Composite);
alphaTexture.Evaluate(Channels.Composite, EvaluateFunction.Polynomial, new double[] { 3.5, -5.05, 2.05, 0.25 });
alphaTexture.SigmoidalContrast(Contrast);
alphaTexture.Alpha(AlphaOption.On);
image.Composite(alphaTexture, CompositeOperator.HardLight);
}
}
public IMagickImage Execute(IMagickImage image, ValueItemCollection values)
{
Variables = values;
if (RemoveBackgroundActive)
{
image.ColorAlpha(MagickColors.Transparent);
image.Alpha(AlphaOption.Set);
image.VirtualPixelMethod = VirtualPixelMethod.Transparent;
// image.ColorFuzz = new Percentage(RemoveBackgroundThreshold);
// image.TransparentChroma(new MagickColor("#FFFFFF"), new MagickColor("#F0F0F0"));
// image.Transparent(MagickColor.FromRgb(255, 255, 255));
var clone = image.Clone();
clone.ColorFuzz = new Percentage(RemoveBackgroundThreshold);
clone.TransparentChroma(new MagickColor("#FFFFFF"), new MagickColor("#F0F0F0"));
clone.Transparent(MagickColor.FromRgb(255, 255, 255));
if (RemoveBackgroundFeather > 0)
{
clone.Scale(new Percentage(10));
clone.Blur(0, RemoveBackgroundFeather, Channels.Alpha);
clone.Resize(image.Width, image.Width);
}
image.Composite(clone, CompositeOperator.CopyAlpha);
image.Alpha(AlphaOption.Background);
using (MagickImageCollection images = new MagickImageCollection())
{
var back = new MagickImage(MagickColors.White, image.Width, image.Height);
images.Add(back);
images.Add(image);
image = images.Flatten().Clone();
}
}
// image.Threshold(new Percentage(RemoveBackgroundThreshold));
// image.Transparent(MagickColor.FromRgb(255, 255, 255));
return(image);
}
private void RemoveNoise(IMagickImage image)
{
using (var second = image.Clone())
{
second.ColorSpace = ColorSpace.Gray;
second.Negate();
second.AdaptiveThreshold(FilterSize, FilterSize, FilterOffset);
second.ContrastStretch((Percentage)0);
if (SmoothingThreshold != null)
{
second.Blur(SmoothingThreshold.Value.ToDouble() / 100, Quantum.Max);
second.Level(SmoothingThreshold.Value, new Percentage(100));
}
image.Composite(second, CompositeOperator.CopyAlpha);
}
image.Opaque(MagickColors.Transparent, BackgroundColor);
image.Alpha(AlphaOption.Off);
}
private void CopyOpacity(IMagickImage image)
{
image.Alpha(AlphaOption.Off);
using (var gray = image.Clone())
{
gray.ColorSpace = ColorSpace.Gray;
gray.Negate();
gray.AdaptiveThreshold(FilterSize, FilterSize, FilterOffset);
gray.ContrastStretch((Percentage)0);
if (Threshold.HasValue)
{
gray.Blur((double)Threshold.Value / 100.0, Quantum.Max);
gray.Level(Threshold.Value, new Percentage(100));
}
image.Composite(gray, CompositeOperator.CopyAlpha);
image.Opaque(MagickColors.Transparent, BackgroundColor);
image.Alpha(AlphaOption.Off);
}
}
public void ShouldCopyTheAlphaChannelWithCopyAlpha()
{
var readSettings = new MagickReadSettings()
{
BackgroundColor = MagickColors.None,
FillColor = MagickColors.White,
FontPointsize = 100,
};
using (IMagickImage image = new MagickImage("label:Test", readSettings))
{
using (IMagickImage alpha = image.Clone())
{
alpha.Alpha(AlphaOption.Extract);
alpha.Shade(130, 30);
alpha.Composite(image, CompositeOperator.CopyAlpha);
ColorAssert.AreEqual(new MagickColor("#7fff7fff7fff0000"), alpha, 0, 0);
ColorAssert.AreEqual(new MagickColor("#7fff7fff7fffffff"), alpha, 30, 30);
}
}
}
/// <summary>
/// Realiza uma determinada ação na imagem
/// </summary>
/// <param name="acao">Ação a executar</param>
/// <param name="imagem">Imagem</param>
public void ProcessarAcao(Acao acao, IMagickImage imagem)
{
if (acao is AcaoEscala escala)
{
imagem.Scale(new Percentage(escala.Percentagem));
}
else if (acao is AcaoRotacao rotacionar)
{
imagem.Rotate(rotacionar.Angulo);
}
else if (acao is AcaoTranslacao translacao)
{
using (var imgOr = imagem.Clone())
{
imagem.Colorize(MagickColors.Black, new Percentage(100));
imagem.Composite(imgOr, translacao.X, translacao.Y);
}
}
else
{
ProcessarAcao(RecuperarDetalhes(acao), imagem);
}
}
static public void DrawEnhancedText(
this IMagickImage <byte> image, string text, Gravity gravity, int x, int y, MagickColor foreground,
DrawableFont font, double fontPointSize, int maxWidth, bool ellipsize = true)
{
var settings = new MagickReadSettings()
{
BackgroundColor = MagickColors.Transparent,
Width = maxWidth,
TextGravity = gravity,
TextAntiAlias = false
};
//settings.SetDefine("pango:wrap", "char");
if (ellipsize)
{
settings.SetDefine("pango:ellipsize", "end");
}
// Escape text for use in pango markup language
// For some reason the text must be excaped twice otherwise it will not work
text = SecurityElement.Escape(SecurityElement.Escape(text));
using var textArea = new MagickImage($@"pango:<span
size=""{fontPointSize * 1000}""
font_family=""{ font.Family }""
stretch=""{font.Stretch}""
style=""{(font.Style == FontStyleType.Any ? FontStyleType.Normal : font.Style)}""
weight=""{font.Weight}""
foreground=""white""
>{text}</span>", settings);
using var colored = new MagickImage(foreground, textArea.Width, textArea.Height);
colored.Alpha(AlphaOption.On);
colored.Composite(textArea, CompositeOperator.Multiply, Channels.Alpha);
image.Composite(colored, x, y, CompositeOperator.Over);
}
