JpegImage
JpegImage constructor (1 of 5)
Initializes a new instance of the JpegImage
class.
public JpegImage(string path)
Parameter | Type | Description |
---|---|---|
path | String | The path to load image from and initialize pixel and palette data with. |
Examples
The example shows how to load a JpegImage from a file.
[C#]
string dir = "c:\\temp\\";
// Load a JPEG image from a file.
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(dir + "sample.jpg"))
{
// Do some image processing.
// Save to another JPEG file.
jpegImage.Save(dir + "sample.output.jpg");
}
See Also
- class JpegImage
- namespace Aspose.Imaging.FileFormats.Jpeg
- assembly Aspose.Imaging
JpegImage constructor (2 of 5)
Initializes a new instance of the JpegImage
class.
public JpegImage(Stream stream)
Parameter | Type | Description |
---|---|---|
stream | Stream | The stream to load image from and initialize pixel and palette data with. |
Examples
The example shows how to load a JpegImage from a file stream.
[C#]
string dir = "c:\\temp\\";
// Load a JPEG image from a file stream.
using (System.IO.Stream stream = System.IO.File.OpenRead(dir + "sample.jpg"))
{
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(stream))
{
// Do some image processing.
// Save to another JPEG file.
jpegImage.Save(dir + "sample.output.jpg");
}
}
See Also
- class JpegImage
- namespace Aspose.Imaging.FileFormats.Jpeg
- assembly Aspose.Imaging
JpegImage constructor (3 of 5)
Initializes a new instance of the JpegImage
class.
public JpegImage(RasterImage rasterImage)
Parameter | Type | Description |
---|---|---|
rasterImage | RasterImage | The image to initialize pixel and palette data with. |
Examples
The example shows how to load a JpegImage from another RasterImage.
[C#]
string dir = "c:\\temp\\";
// Load a JPEG image from another raster image.
// First, create a temporal PNG image that will be a foundation for building a JPEG image.
// You can also load PNG image from a file or use an image of any other raster format.
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
createOptions.Source = new Aspose.Imaging.Sources.StreamSource(new System.IO.MemoryStream(), false);
using (Aspose.Imaging.RasterImage rasterImage = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Create(createOptions, 100, 100))
{
// Fill the entire PNG image in red.
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(rasterImage);
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush(Aspose.Imaging.Color.Red);
graphics.FillRectangle(brush, rasterImage.Bounds);
// Create a JPEG image based on the PNG image.
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(rasterImage))
{
// Save to a JPEG file
jpegImage.Save(dir + "output.jpg");
}
}
See Also
- class RasterImage
- class JpegImage
- namespace Aspose.Imaging.FileFormats.Jpeg
- assembly Aspose.Imaging
JpegImage constructor (4 of 5)
Initializes a new instance of the JpegImage
class.
public JpegImage(int width, int height)
Parameter | Type | Description |
---|---|---|
width | Int32 | The image width. |
height | Int32 | The image height. |
Examples
The following example shows how to create JPEG image of the specified size.
[C#]
string dir = "c:\\temp\\";
// Create a JPEG image of 100x100 px.
using (Aspose.Imaging.FileFormats.Jpeg.JpegImage jpegImage = new Aspose.Imaging.FileFormats.Jpeg.JpegImage(100, 100))
{
// Do some image processing.
// Save to a file.
jpegImage.Save(dir + "output.jpg");
}
The following example loads a BMP image and saves it to JPEG using various save options.
[C#]
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);
}
See Also
- class JpegImage
- namespace Aspose.Imaging.FileFormats.Jpeg
- assembly Aspose.Imaging
JpegImage constructor (5 of 5)
Initializes a new instance of the JpegImage
class.
public JpegImage(JpegOptions jpegOptions, int width, int height)
Parameter | Type | Description |
---|---|---|
jpegOptions | JpegOptions | The jpeg options. |
width | Int32 | Image width. |
height | Int32 | Image height. |
Examples
The following example loads a BMP image and saves it to JPEG using various save options.
[C#]
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);
}
The following example shows how to create JPEG image of the specified size with the specified parameters.
[C#]
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");
}
See Also
- class JpegOptions
- class JpegImage
- namespace Aspose.Imaging.FileFormats.Jpeg
- assembly Aspose.Imaging