Procedura: codificare e decodificare un'immagine TIFF
Gli esempi seguenti illustrano come decodificare e codificare un'immagine TIFF (Tagged Image File Format) usando gli oggetti e TiffBitmapEncoder specificiTiffBitmapDecoder.
Decodificare un'immagine TIFF
In questo esempio viene illustrato come decodificare un'immagine TIFF usando un TiffBitmapDecoder oggetto da un oggetto Uri.
// Open a Stream and decode a TIFF image.
Stream^ imageStreamSource = gcnew FileStream("tulipfarm.tif", FileMode::Open, FileAccess::Read, FileShare::Read);
TiffBitmapDecoder^ decoder = gcnew TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions::PreservePixelFormat, BitmapCacheOption::Default);
BitmapSource^ bitmapSource = decoder->Frames[0];
// Draw the Image.
Image^ myImage = gcnew Image();
myImage->Source = bitmapSource;
myImage->Stretch = Stretch::None;
myImage->Margin = System::Windows::Thickness(20);
// Open a Stream and decode a TIFF image.
Stream imageStreamSource = new FileStream("tulipfarm.tif", FileMode.Open, FileAccess.Read, FileShare.Read);
var decoder = new TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
BitmapSource bitmapSource = decoder.Frames[0];
// Draw the Image.
var myImage = new Image();
myImage.Source = bitmapSource;
myImage.Stretch = Stretch.None;
myImage.Margin = new Thickness(20);
' Open a Stream and decode a TIFF image.
Dim imageStreamSource As New FileStream("tulipfarm.tif", FileMode.Open, FileAccess.Read, FileShare.Read)
Dim decoder As New TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default)
Dim bitmapSource As BitmapSource = decoder.Frames(0)
' Draw the Image.
Dim myImage As New Image()
myImage.Source = bitmapSource
myImage.Stretch = Stretch.None
myImage.Margin = New Thickness(20)
Codificare un'immagine TIFF
In questo esempio viene illustrato come codificare un oggetto BitmapSource in un'immagine TIFF usando un oggetto TiffBitmapEncoder.
int width = 128;
int height = width;
int stride = width / 8;
array<System::Byte>^ pixels = gcnew array<System::Byte>(height * stride);
// Define the image palette.
BitmapPalette^ myPalette = BitmapPalettes::WebPalette;
// Creates a new empty image with the pre-defined palette.
BitmapSource^ image = BitmapSource::Create(width,
height,
96,
96,
PixelFormats::Indexed1,
myPalette,
pixels,
stride);
FileStream^ stream = gcnew FileStream("new.tif", FileMode::Create);
TiffBitmapEncoder^ encoder = gcnew TiffBitmapEncoder();
TextBlock^ myTextBlock = gcnew TextBlock();
myTextBlock->Text = "Codec Author is: " + encoder->CodecInfo->Author->ToString();
encoder->Compression = TiffCompressOption::Zip;
encoder->Frames->Add(BitmapFrame::Create(image));
encoder->Save(stream);
int width = 128;
int height = width;
int stride = width / 8;
byte[] pixels = new byte[height * stride];
// Define the image palette.
BitmapPalette myPalette = BitmapPalettes.WebPalette;
// Creates a new empty image with the pre-defined palette.
BitmapSource image = BitmapSource.Create(
width,
height,
96,
96,
PixelFormats.Indexed1,
myPalette,
pixels,
stride);
var stream = new FileStream("new.tif", FileMode.Create);
var encoder = new TiffBitmapEncoder();
var myTextBlock = new TextBlock();
myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString();
encoder.Compression = TiffCompressOption.Zip;
encoder.Frames.Add(BitmapFrame.Create(image));
encoder.Save(stream);
Dim width As Integer = 128
Dim height As Integer = width
Dim stride As Integer = width / 8
Dim pixels(height * stride - 1) As Byte
' Define the image palette.
Dim myPalette As BitmapPalette = BitmapPalettes.WebPalette
' Creates a new empty image with the pre-defined palette.
Dim image As BitmapSource = BitmapSource.Create( _
width, height, 96, 96, PixelFormats.Indexed1, myPalette, pixels, stride)
Dim stream As New FileStream("new.tif", FileMode.Create)
Dim encoder As New TiffBitmapEncoder()
Dim myTextBlock As New TextBlock()
myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString()
encoder.Compression = TiffCompressOption.Zip
encoder.Frames.Add(BitmapFrame.Create(image))
encoder.Save(stream)
Vedi anche
Collabora con noi su GitHub
L'origine di questo contenuto è disponibile in GitHub, in cui è anche possibile creare ed esaminare i problemi e le richieste pull. Per ulteriori informazioni, vedere la guida per i collaboratori.
.NET Desktop feedback