Extracts the specified frames from the input file, and saves them to a new JPEG 2000 file in a byte array. This method is available in the Document/Medical Toolkits.
Public Overloads Function ExtractFramesMemory( _
ByVal fileName As String, _
ByVal frames As List(Of Integer) _
) As Byte()
fileName
System.String containing the name of the JPEG 2000 file from which the frames are being extracted.
frames
Frame indices. A list of integers specifying the indices of the frames to be extracted from the input file. All indices should be 0-based.
A byte array that contains a JPEG 2000 file with only the extracted frames.
. This file contains only the extracted frame headers/code streams (not any obtained through the decompressing/recompressing process) so it saves processor time and memory.
This method is very suitable for server applications where multiple clients request specific frames of a JPEG 2000 file. Instead of decompressing and then recompressing the frames this method copies only the needed frame data, saving the data to a new JPEG 2000 file.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Jpeg2000;
public byte[] ExtractFramesMemoryStringExample(List<int> frames)
{
Jpeg2000Engine engine = new Jpeg2000Engine();
Jpeg2000FileInformation fileInfo = engine.GetFileInformation(Path.Combine(LEAD_VARS.ImagesDir, "image1.jpx"));
for (int i = 0; i < frames.Count; i++)
if (frames[i] >= fileInfo.Frame.GetLength(0))
return null;
return engine.ExtractFramesMemory(Path.Combine(LEAD_VARS.ImagesDir, "image1.jpx"), frames);
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Jpeg2000
Private Function ExtractFramesMemoryStringExample(ByVal frames As List(Of Integer)) As Byte()
Dim engine As New Jpeg2000Engine()
Dim fileInfo As Jpeg2000FileInformation = engine.GetFileInformation(Path.Combine(LEAD_VARS.ImagesDir, "image1.jpx"))
For i As Integer = 0 To frames.Count - 1
If (frames(i) >= fileInfo.Frame.GetLength(0)) Then
Return Nothing
End If
Next i
Return engine.ExtractFramesMemory(Path.Combine(LEAD_VARS.ImagesDir, "image1.jpx"), frames)
End Function
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
ExtractFramesMemory(Stream, List)
Compression Using LEAD and JPEG Formats
File Formats - JPEG And LEAD Compressed
Bitmaps In Memory And In Files
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
Supported Platforms
.NET, Java, Android, and iOS/macOS Assemblies
Imaging, Medical, and Document
C API/C++ Class Libraries
Imaging, Medical, and Document
HTML5 JavaScript Libraries
Imaging, Medical, and Document
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