Aspose.Imaging for .NET一種高級(jí)圖像處理控件，允許開發(fā)人員創(chuàng)建，編輯，繪制或轉(zhuǎn)換圖像。圖像導(dǎo)出和轉(zhuǎn)換是API核心功能之一，它允許在不安裝Photoshop應(yīng)用程序或任何其他圖像編輯器的情況下保存為AdobePhotoshop®本機(jī)格式。

事實(shí)證明，Aspose.Imaging是處理各種圖像格式的強(qiáng)大API。除單頁(yè)圖像外，Aspose.Imaging還支持處理多頁(yè)圖像，包括GIF，TIFF，PSD，DICOM，CDR和WebP。

近期發(fā)布了Aspose.Imaging for .NET v20.5，支持從TIFF提取路徑，優(yōu)化Dicom格式的速度或內(nèi)存，支持將可讀的全幀gif導(dǎo)出為多頁(yè)圖像格式，還沒(méi)使用過(guò)的朋友可以點(diǎn)擊下載最新版Aspose.Imaging

新增與改善

新功能用法示例

IMAGINGNET-3731支持從TIFF提取路徑

### Clipping Path
Clipping path is the Photoshop technique to remove the background from an image. Photoshop allows you to select a part of an image
using Clipping Path and save the path within a file. Clipping Paths allow you to hide the part of an image you don't want to appear. 
Anything inside the clipping path will be visible, but anything outside of it will be transparent.

Other words Photoshop makes it possible to isolate certain parts of an image, without permanently changing the layer.
This allows you to tweak the image at any point in the creative process. Clipping Paths are a traditional method of cutting
out objects or people in Photoshop that allows you to create image files with transparent backgrounds. This approach works best
with objects or people with "hard" edges around the object or person you want to cut out.

### Access Clipping Paths in TIFF image
*PathResources* property allows you to access Clipping Paths in TIFF frame. The following code retrieves paths from TIFF image
and displays their names in the console:

using (var image = (TiffImage)Image.Load("Sample.tif"))
{
   foreach (var path in image.ActiveFrame.PathResources)
    {
       Console.WriteLine(path.Name);
    }
}

### Modify existing Clipping Paths
You can easily modify already existing Clipping Paths. For instance, you can keep only one Clipping Path in the image:

using (var image = (TiffImage)Image.Load("Sample.tif"))
{
   var paths = image.ActiveFrame.PathResources;
   image.ActiveFrame.PathResources = paths.Take(1).ToList();
   image.Save();
}

### Create Clipping Path manually
You can manually create Clipping Path in TIFF image. In order to do that you need to create an instance of *PathResource* class.
The following code demonstrates the way how you can create an empty path in TIFF image:

var options = new TiffOptions(TiffExpectedFormat.Default);
var frame = new TiffFrame(options, 800, 600);

using (var image = new TiffImage(frame))
{
   image.ActiveFrame.PathResources = new List{
       new PathResource
        {
           BlockId = 2000,
           Name = "My Clipping Path",
           Records = new List()
        }
    };

   image.Save("ImageWithEmptyPath.tiff");
}

### Clipping Path content
To create your own Clipping Paths you need to understand their content. Photoshop stores its paths as resources with IDs in
the range 2000 through 2997. The name of the resource is the name given to the path when it was saved. If the file contains a
resource with an ID of 2999, then this resource contains the name of the clipping path. Each path has a set of records to hold the data.

**Record classes:**
*LengthRecord* - contains the number of Bezier knot records.
*BezierKnotRecord* - describes the knots of the path.
*ClipboardRecord* - contains four fixed-point numbers for the bounding rectangle.

More details you can find in
[Adobe Photoshop File Formats Specification](//www.adobe.com/devnet-apps/photoshop/fileformatashtml/).

IMAGINGNET-3724支持將可讀的全幀gif導(dǎo)出為多頁(yè)圖像格式

 // Added support for full-frame export from gif format

    string baseDirectoryPath = @"D:\";
    string fileName = "Animation.gif";
    string inputFilePath = Path.Combine(baseDirectoryPath, fileName);
    string outputFilePath = inputFilePath + "_FullFrame.tif";
    string outputFilePath1 = inputFilePath + "_NonFullFrame.tif";
    using (Image image = Image.Load(inputFilePath))
    {
       image.Save(outputFilePath, new TiffOptions(TiffExpectedFormat.TiffDeflateRgb)
                        { MultiPageOptions = new              MultiPageOptions(new IntRange(2, 5)), FullFrame = true });
       image.Save(outputFilePath1, new TiffOptions(TiffExpectedFormat.TiffDeflateRgb)
                        { MultiPageOptions = new              MultiPageOptions(new IntRange(2, 5))});
    }

IMAGINGNET-3417允許Dicom格式的速度或內(nèi)存優(yōu)化策略

 // Example 1. Setting a memory limit of 50 megabytes for operations on the created Dicom image
var imageOptions = new DicomOptions();
imageOptions.Source = new FileCreateSource("created.dcm", false);
imageOptions.BufferSizeHint = 50;
using (Image image = Image.Create(imageOptions, 1000, 1000))
{
// Do something with the created image
//...

image.Save();
}

// Example 2. Setting a memory limit of 20 megabytes for operations on the loaded Dicom image
var loadOptions = new LoadOptions();
loadOptions.BufferSizeHint = 20;
using (Image image = Image.Load("image.dcm", loadOptions))
{
// Do something with the loaded image
//...
}

// Example 3. Settings a memory limit of 30 mebagytes for export-to-dicom operation
var loadOptions = new LoadOptions();
loadOptions.BufferSizeHint = 30;
using (Image image = Image.Load("image.png", loadOptions))
{
image.Save("exported.dcm", new DicomOptions());
}

// Create a multi-page Dicom image.
using (DicomImage image = (DicomImage)Image.Create(
       new DicomOptions() { Source = new StreamSource(new MemoryStream()) },
       100,
       100))
{
   // Draw something using vector graphics
   Graphics graphics = new Graphics(image);
   graphics.FillRectangle(new SolidBrush(Color.BlueViolet), image.Bounds);
   graphics.FillRectangle(new SolidBrush(Color.Aqua), 10, 20, 50, 20);
   graphics.FillEllipse(new SolidBrush(Color.Orange), 30, 50, 70, 30);

   // Save the pixels of the drawn image. They are now on the first page of the Dicom image.
   int[] pixels = image.LoadArgb32Pixels(image.Bounds);

   // Add a few pages after, making them darker
   for (int i = 1; i < 5; i++) { DicomPage page = image.AddPage(); page.SaveArgb32Pixels(page.Bounds, pixels); page.AdjustBrightness(i * 30); } // Add a few pages in front of the main page, making them brighter for (int i = 1; i < 5; i++) { DicomPage page = image.InsertPage(0); page.SaveArgb32Pixels(page.Bounds, pixels); page.AdjustBrightness(-i * 30); } // Save the created multi-page image to the output file image.Save("MultiPage.dcm"); }