Class JpegOptions
Class JpegOptions
Името на пространството: Aspose.Imaging.ImageOptions Асамблея: Aspose.Imaging.dll (25.5.0)
Създаване на висококачествени JPEG изображения без усилие с нашия API, предлагайки приспособиминива на компресия за оптимизиране на размера на съхранението, без да се нарушава качеството на изображението.Ползите от поддръжката за различни типове компресии, близо до безкрайно кодиране,RGB и CMYK цветни профили, както и EXIF, JFIF изображения данни, и XMPконтейнери, осигуряване на универсални и персонализирани опции за вашите нужди за създаване на изображения.
[JsonObject(MemberSerialization.OptIn)]
public class JpegOptions : ImageOptionsBase, IDisposable, ICloneable, IHasXmpData, IHasJpegExifData, IHasExifData, IHasMetadataInheritance
object ← DisposableObject ← ImageOptionsBase ← JpegOptions
Implements
IDisposable , ICloneable , IHasXmpData , IHasJpegExifData , IHasExifData , IHasMetadata
наследници
ImageOptionsBase.Clone() , ImageOptionsBase.ReleaseManagedResources() , ImageOptionsBase.KeepMetadata , ImageOptionsBase.XmpData , ImageOptionsBase.Source , ImageOptionsBase.Palette , ImageOptionsBase.ResolutionSettings , ImageOptionsBase.VectorRasterizationOptions , ImageOptionsBase.BufferSizeHint , ImageOptionsBase.MultiPageOptions , ImageOptionsBase.FullFrame , ImageOptionsBase.ProgressEventHandler , DisposableObject.Dispose() , DisposableObject.ReleaseManagedResources() , DisposableObject.ReleaseUnmanagedResources() , DisposableObject.VerifyNotDisposed() , DisposableObject.Disposed , object.GetType() , object.MemberwiseClone() , object.ToString() , object.Equals(object?) , object.Equals(object?, object?) , object.ReferenceEquals(object?, object?) , object.GetHashCode()
Examples
Този пример показва използването на System.IO.Stream за създаване на нов файл за изображение (тип JPEG)
//Creates an instance of JpegOptions and set its various properties
Aspose.Imaging.ImageOptions.JpegOptions jpegOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
//Create an instance of System.IO.Stream
System.IO.Stream stream = new System.IO.FileStream(@"C:\temp\sample.jpeg", System.IO.FileMode.Create);
//Define the source property for the instance of JpegOptions
//Second boolean parameter determins if the Stream is disposed once get out of scope
jpegOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream, true);
//Creates an instance of Image and call Create method with JpegOptions as parameter to initialize the Image object
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(jpegOptions, 500, 500))
{
//do some image processing
}Този пример показва използването на различни класове от SaveOptions Namespace за целите на износа. изображение от типа Gif се зарежда в инстанция на Image и след това се експортира в няколко формати.
string dir = "c:\\temp\\";
//Load an existing image (of type Gif) in an instance of Image class
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
//Export to BMP file format using the default options
image.Save(dir + "output.bmp", new Aspose.Imaging.ImageOptions.BmpOptions());
//Export to JPEG file format using the default options
image.Save(dir + "output.jpg", new Aspose.Imaging.ImageOptions.JpegOptions());
//Export to PNG file format using the default options
image.Save(dir + "output.png", new Aspose.Imaging.ImageOptions.PngOptions());
//Export to TIFF file format using the default options
image.Save(dir + "output.tif", new Aspose.Imaging.ImageOptions.TiffOptions(Aspose.Imaging.FileFormats.Tiff.Enums.TiffExpectedFormat.Default));
}Следващият пример показва как да се конвертира многостранен вектор на изображението в JPEG формат като цяло без позоваване на конкретен тип изображение.
string dir = "C:\\aspose.imaging\\net\\misc\\ImagingReleaseQATester\\Tests\\testdata\\2548";
string inputFilePath = System.IO.Path.Combine(dir, "Multipage.cdr");
string outputFilePath = System.IO.Path.Combine(dir, "Multipage.cdr.jpeg");
Aspose.Imaging.ImageOptionsBase exportOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(inputFilePath))
{
exportOptions.MultiPageOptions = null;
// Export only first two pages. In fact, only one page will be rasterized because JPEG is not a multi-page format.
Aspose.Imaging.IMultipageImage multipageImage = image as Aspose.Imaging.IMultipageImage;
if (multipageImage != null && (multipageImage.Pages != null && multipageImage.PageCount > 2))
{
exportOptions.MultiPageOptions = new Aspose.Imaging.ImageOptions.MultiPageOptions(new Aspose.Imaging.IntRange(0, 2));
}
if (image is Aspose.Imaging.VectorImage)
{
exportOptions.VectorRasterizationOptions = (Aspose.Imaging.ImageOptions.VectorRasterizationOptions)image.GetDefaultOptions(new object[] { Aspose.Imaging.Color.White, image.Width, image.Height });
exportOptions.VectorRasterizationOptions.TextRenderingHint = Aspose.Imaging.TextRenderingHint.SingleBitPerPixel;
exportOptions.VectorRasterizationOptions.SmoothingMode = Aspose.Imaging.SmoothingMode.None;
}
image.Save(outputFilePath, exportOptions);
}Constructors
JpegOptions()
Иницијализира нова инстанция на Aspose.Imaging.ImageOptions.JpegOption клас.
[JsonConstructor]
public JpegOptions()Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}JpegOptions(JpegOptions)
Иницијализира нова инстанция на Aspose.Imaging.ImageOptions.JpegOption клас.
public JpegOptions(JpegOptions jpegOptions)Parameters
jpegOptions JpegOptions
Опции за JPEG.
Properties
BitsPerChannel
Получава или задава битове по канал за безпроблемно jpeg изображение. сега ние поддържаме от 2 до 8 бита на канал.
public byte BitsPerChannel { get; set; }стойност на имота
Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}CmykColorProfile
Цветният профил на дестинация CMYK за изображенията на cmYK jpeg. Използвайте за съхранение на снимки. Трябва да бъде в комбинация с RGBColorProfile за правилна конверсия на цветовете.
public StreamSource CmykColorProfile { get; set; }стойност на имота
Examples
Следващият пример зарежда PNG и го съхранява в CMYK JPEG с помощта на персонализиран ICC профил. След това зареждат CMYK JPES и я съхраняват обратно в ПNG. Конвертирането на цветовете от RGB до CMYN и от CMYL до RMB се извършва с използване на специални ICR профили.
string dir = "c:\\temp\\";
// Load PNG and save it to CMYK JPEG
using (Aspose.Imaging.FileFormats.Png.PngImage image = (Aspose.Imaging.FileFormats.Png.PngImage)Image.Load(dir + "sample.png"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Cmyk;
// Use custom ICC profiles
saveOptions.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
saveOptions.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
image.Save(dir + "output.cmyk.jpg", saveOptions);
}
}
// Load CMYK JPEG and save it to PNG
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage image = (Aspose.Imaging.FileFormats.Jpeg.JpegImage)Image.Load(dir + "output.cmyk.jpg"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
// Use custom ICC profiles
image.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
image.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
image.Save(dir + "output.rgb.png", saveOptions);
}
}ColorType
Получава или задава цветовия тип за jpeg изображение.
public JpegCompressionColorMode ColorType { get; set; }стойност на имота
Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример зарежда PNG и го съхранява в CMYK JPEG с помощта на персонализиран ICC профил. След това зареждат CMYK JPES и я съхраняват обратно в ПNG. Конвертирането на цветовете от RGB до CMYN и от CMYL до RMB се извършва с използване на специални ICR профили.
string dir = "c:\\temp\\";
// Load PNG and save it to CMYK JPEG
using (Aspose.Imaging.FileFormats.Png.PngImage image = (Aspose.Imaging.FileFormats.Png.PngImage)Image.Load(dir + "sample.png"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Cmyk;
// Use custom ICC profiles
saveOptions.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
saveOptions.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
image.Save(dir + "output.cmyk.jpg", saveOptions);
}
}
// Load CMYK JPEG and save it to PNG
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage image = (Aspose.Imaging.FileFormats.Jpeg.JpegImage)Image.Load(dir + "output.cmyk.jpg"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
// Use custom ICC profiles
image.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
image.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
image.Save(dir + "output.rgb.png", saveOptions);
}
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}Comment
Получава или поставя коментар на JPEG файла.
public string Comment { get; set; }стойност на имота
CompressionType
Получава или поставя типа на компресия.
public JpegCompressionMode CompressionType { get; set; }стойност на имота
Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}DefaultMemoryAllocationLimit
Получава или поставя границата за разпределяне на паметта по подразбиране.
[Obsolete("Use Aspose.Imaging.Image.BufferSizeHint, Aspose.Imaging.ImageOptionsBase.BufferSizeHint or Aspose.Imaging.LoadOptions.BufferSizeHint instead.")]
public int DefaultMemoryAllocationLimit { get; set; }стойност на имота
ExifData
Вземете или задайте контейнер за данни на Exif.
[JsonProperty]
public JpegExifData ExifData { get; set; }стойност на имота
HorizontalSampling
Получава или поставя хоризонталните подсъчета за всеки компонент.
public byte[] HorizontalSampling { get; set; }стойност на имота
byte []
Jfif
Вземете или поставете jfif.
public JFIFData Jfif { get; set; }стойност на имота
JpegLsAllowedLossyError
Получава или поставя разликата JPEG-LS, свързана с кодиране в близост до загуба (NEAR параметър от спецификацията JPeg- LS).
public int JpegLsAllowedLossyError { get; set; }стойност на имота
JpegLsInterleaveMode
Получава или задава JPEG-LS интерлиев режим.
public JpegLsInterleaveMode JpegLsInterleaveMode { get; set; }стойност на имота
JpegLsPreset
Получава или задава параметрите на JPEG-LS.
public JpegLsPresetCodingParameters JpegLsPreset { get; set; }стойност на имота
PreblendAlphaIfPresent
Получава или задава стойност, която показва дали червените, зелените и сините компоненти трябва да се смесват с цвят на фона, ако има алфа канал.
public bool PreblendAlphaIfPresent { get; set; }стойност на имота
Quality
Получава или определя качеството на изображението.
public int Quality { get; set; }стойност на имота
Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}RdOptSettings
Получава или задава настройките на RD оптимизатора.
[JsonProperty]
public RdOptimizerSettings RdOptSettings { get; set; }стойност на имота
ResolutionUnit
Получава или поставя единицата за резолюция.
public ResolutionUnit ResolutionUnit { get; set; }стойност на имота
Examples
Следващият пример зарежда BMP изображение и го съхранява в JPEG с помощта на различни възможности за съхранение.
string dir = "c:\\temp\\";
// Load a BMP image from a file.
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
// Do some image processing.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8.
// When a palette is used, the color index is stored in the image data instead of the color itself.
saveOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
saveOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
saveOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
saveOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// If the source image is colored, it will be converted to grayscaled.
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Grayscale;
// Use a palette to reduce the output size.
saveOptions.Palette = Aspose.Imaging.ColorPaletteHelper.Create8BitGrayscale(false);
image.Save(dir + "sample.palettized.jpg", saveOptions);
}Следващият пример показва как да се създаде JPEG изображение на посочения размер с посочените параметри.
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
// Use additional options to specify the desired image parameters.
Aspose.Imaging.ImageOptions.JpegOptions createOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
// The number of bits per channel is 8, 8, 8 for Y, Cr, Cb components accordingly.
createOptions.BitsPerChannel = 8;
// Set the progressive type of compression.
createOptions.CompressionType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionMode.Progressive;
// Set the image quality. It is a value between 1 and 100.
createOptions.Quality = 100;
// Set the horizontal/vertical resolution to 96 dots per inch.
createOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
createOptions.ResolutionUnit = Aspose.Imaging.ResolutionUnit.Inch;
// This is a standard option for JPEG images.
// Two chroma components (Cb and Cr) can be bandwidth-reduced, subsampled, compressed.
createOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.YCbCr;
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(createOptions, 100, 100))
{
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(jpegImage);
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(jpegImage.Width, jpegImage.Height),
Aspose.Imaging.Color.Yellow,
Aspose.Imaging.Color.Blue);
// Fill the image with a grayscale gradient
graphics.FillRectangle(gradientBrush, jpegImage.Bounds);
// Save to a file.
jpegImage.Save(dir + "output.explicitoptions.jpg");
}RgbColorProfile
Цветният профил на дестинация RGB за CMYK jpeg изображения. Използвайте за съхранение на снимки. Трябва да бъде в комбинация с CMYKColorProfile за правилна конверсия на цветовете.
public StreamSource RgbColorProfile { get; set; }стойност на имота
Examples
Следващият пример зарежда PNG и го съхранява в CMYK JPEG с помощта на персонализиран ICC профил. След това зареждат CMYK JPES и я съхраняват обратно в ПNG. Конвертирането на цветовете от RGB до CMYN и от CMYL до RMB се извършва с използване на специални ICR профили.
string dir = "c:\\temp\\";
// Load PNG and save it to CMYK JPEG
using (Aspose.Imaging.FileFormats.Png.PngImage image = (Aspose.Imaging.FileFormats.Png.PngImage)Image.Load(dir + "sample.png"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
saveOptions.ColorType = Aspose.Imaging.FileFormats.Jpeg.JpegCompressionColorMode.Cmyk;
// Use custom ICC profiles
saveOptions.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
saveOptions.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
image.Save(dir + "output.cmyk.jpg", saveOptions);
}
}
// Load CMYK JPEG and save it to PNG
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage image = (Aspose.Imaging.FileFormats.Jpeg.JpegImage)Image.Load(dir + "output.cmyk.jpg"))
{
using (System.IO.Stream rgbProfileStream = System.IO.File.OpenRead(dir + "eciRGB_v2.icc"))
using (System.IO.Stream cmykProfileStream = System.IO.File.OpenRead(dir + "ISOcoated_v2_FullGamut4.icc"))
{
// Use custom ICC profiles
image.RgbColorProfile = new Aspose.Imaging.Sources.StreamSource(rgbProfileStream);
image.CmykColorProfile = new Aspose.Imaging.Sources.StreamSource(cmykProfileStream);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
image.Save(dir + "output.rgb.png", saveOptions);
}
}SampleRoundingMode
Получава или задава образец за завъртане, за да съответства на 8-битната стойност на стойността на n-бит. JpegOptions.BitsPerChannel
public SampleRoundingMode SampleRoundingMode { get; set; }стойност на имота
ScaledQuality
Качеството е скалирано.
public int ScaledQuality { get; }стойност на имота
VerticalSampling
Получава или поставя вертикалните подсъчета за всеки компонент.
public byte[] VerticalSampling { get; set; }стойност на имота
byte []
