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GetPreCompressedImage Method

Summary

Gets a pre-compressed image for a DICOM object with the specified compression options.

Syntax

C#
VB
C++
protected virtual byte[] GetPreCompressedImage( 
   string dicomFileName, 
   string sopInstanceUID, 
   int frameNumber, 
   int imageWidth, 
   int imageHeight, 
   string mimeType, 
   int bitsPerPixel, 
   int qualityFactor, 
   RasterCodecs codec 
) 
  
Protected Overridable Function GetPreCompressedImage( _ 
   ByVal dicomFileName As String, _ 
   ByVal sopInstanceUID As String, _ 
   ByVal frameNumber As Integer, _ 
   ByVal imageWidth As Integer, _ 
   ByVal imageHeight As Integer, _ 
   ByVal mimeType As String, _ 
   ByVal bitsPerPixel As Integer, _ 
   ByVal qualityFactor As Integer, _ 
   ByVal codec As Leadtools.Codecs.RasterCodecs _ 
) As Byte() 
protected: 
virtual array<byte>^ GetPreCompressedImage(  
   String^ dicomFileName, 
   String^ sopInstanceUID, 
   int frameNumber, 
   int imageWidth, 
   int imageHeight, 
   String^ mimeType, 
   int bitsPerPixel, 
   int qualityFactor, 
   Leadtools.Codecs.RasterCodecs^ codec 
)

Parameters

dicomFileName
The physical path of the DICOM file containing the image.

sopInstanceUID
The SOP Instance UID of the DICOM object.

frameNumber
A 1-based number of the frame you want to retrieve from the image. Pass 0 to get a representative frame and -1 to get the complete image with all frames.

imageWidth
The width, in pixels, of the image. The returned image can have a different width (to preserve scale ratio). Pass 0 to keep the original width.

imageHeight
The height, in pixels, of the image. The returned image can have a different height (to preserve scale ratio). Pass 0 to keep the original height.

mimeType
A System.String representing the file format and compression of the image. Check the Leadtools.Dicom.Services.DataTypes.SupportedImageFormat class for supported file formats and compression.

bitsPerPixel
Resulting image's pixel depth. Note that not all bits per pixel are available in all image formats. If bitsPerPixel is 0, the image will be stored using the original or closest bits/pixel value supported by that format.

qualityFactor
The quality factor (Q factor) is a number that determines the degree of loss in the compression process. Use 0 for Lossless compression. Valid values range from 2 to 255, where 2 is the highest quality and 255 is the most compression.

codec
An initialized Leadtools.Codecs.RasterCodecs object to be used for loading the pre-compressed image or retrieving its information.

Return Value

A buffer containing the pre-compressed Leadtools.RasterImage. If no pre-compressed image is available a null value will be returned.

Remarks

Note to developers: override this method to provide your own method of retrieving the pre-compressed images. Also, this method will be called before loading any image from the DoGetSeriesImages and DoGetImage methods to check whether a pre-compressed image currently exists.

Requirements

Target Platforms

Help Version 19.0.2017.10.27
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