←Select platform

ConvertDirectToImage(ConversionColorFormat,ConversionColorFormat,byte[],int,RasterImage,int,int,int,int) Method

Summary

Converts image data in a managed buffer from one color conversion model directly to RGB\BGR using built-in algorithms, and sets the output as a RasterImage.

Syntax
C#
C++
public static void ConvertDirectToImage( 
   ConversionColorFormat srcFormat, 
   ConversionColorFormat destFormat, 
   byte[] srcBuffer, 
   int srcBufferOffset, 
   RasterImage image, 
   int width, 
   int height, 
   int inAlign, 
   int outAlign 
) 
vb[VB Syntax] 
Public Shared Sub ConvertDirectToImage( 
   ByVal _srcFormat_ As ConversionColorFormat, 
   ByVal _destFormat_ As ConversionColorFormat, 
   ByVal _srcBuffer_() As Byte, 
   ByVal _srcBufferOffset_ As Integer, 
   ByVal _image_ As RasterImage, 
   ByVal _width_ As Integer, 
   ByVal _height_ As Integer, 
   ByVal _inAlign_ As Integer, 
   ByVal _outAlign_ As Integer 
) 
public:  
   static void ConvertDirectToImage( 
       ConversionColorFormat^ srcFormat, 
      ConversionColorFormat^ destFormat, 
      array<Byte>^ srcBuffer, 
      int srcBufferOffset, 
      RasterImage^ image, 
      int width, 
      int height, 
      int inAlign, 
      int outAlign 
   ) 

Parameters

srcFormat

Format of the input data.

destFormat

Format of the output data.

srcBuffer

A pointer to the buffer containing the input data.

srcBufferOffset

Offset to the first byte of the srcBuffer data buffer.

image

A RasterImage object that will hold the converted data.

width

Width of pixels to be processed.

height

Height of pixels to be processed.

inAlign

Each scanline in the input buffer is a multiple of inAlign bytes.

outAlign

Each scanline in the output buffer is a multiple of outAlign bytes.

Remarks

There is no need to call the Start and Stop methods to initialize or stop the conversion engine.

Converting from any color space to YCCK color space is currently not supported.

For more information about Alignment Parameters, refer to Alignment Parameters.

To convert to the Yp41 type, the input buffer length must be a multiple of 8.

Example

This example will convert BGR image to Lab color space, and then convert the Lab buffer to RasterImage, using the static method ConvertDirectToImage.

C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ColorConversion; 
 
 
public void ConvertDirectToImageExample() 
{ 
   // Initialize the RasterCodecs class 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // StartUp the ColorConversion. 
   RasterColorConverterEngine.Startup(); 
 
   // The input file name 
   string inputFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
   // load the input image as Bgr. 
   RasterImage bgrImage = codecs.Load(inputFileName, 24, CodecsLoadByteOrder.Bgr, 1, 1); 
 
   // Image buffer array 
   byte[] bgrBuffer = new byte[bgrImage.BytesPerLine * bgrImage.Height]; 
 
   bgrImage.Access(); 
   // get image buffer 
   for (int i = 0; i < bgrImage.Height; i++) 
      bgrImage.GetRow(i, bgrBuffer, i * bgrImage.BytesPerLine, bgrImage.BytesPerLine); 
   bgrImage.Release(); 
 
   // Initialize a new Converter object 
   RasterColorConverterEngine converter = new RasterColorConverterEngine(); 
 
   // output Buffer array 
   byte[] labBuffer = new byte[bgrBuffer.Length]; 
 
   ConversionParameters convParams = new ConversionParameters(); 
 
   // Initialize the labParams structure property. 
   ConversionLabParameters labParameters = ConversionLabParameters.Empty; 
 
   // Set its properties 
   labParameters.AOffset = 128; 
   labParameters.ARange = 170; 
   labParameters.BOffset = 96; 
   labParameters.BRange = 200; 
   labParameters.LOffset = 0; 
   labParameters.LRange = 100; 
   labParameters.Mask = ConversionLabMaskFlags.AOffset | 
      ConversionLabMaskFlags.ARange | 
      ConversionLabMaskFlags.BOffset | 
      ConversionLabMaskFlags.BRange | 
      ConversionLabMaskFlags.LOffset | 
      ConversionLabMaskFlags.LRange; 
 
   convParams.LabParameters = labParameters; 
 
   // Initialize an image to hold the converted buffer. 
   RasterImage labImage = null; 
 
   try 
   { 
      // Start the color conversion 
      converter.Start(ConversionColorFormat.Bgr, ConversionColorFormat.Lab, null); 
 
      // Change the Lab properties 
      convParams.Method = ConversionMethodFlags.ChangeLab; 
 
      // Set the updated properties 
      converter.SetParameters(convParams); 
 
      // convert the image buffer  
      converter.Convert(bgrBuffer, // input buffer 
         0, // offset from the beginning of the source buffer 
         labBuffer, // output buffer 
         0, // offset from the beginning of the destination buffer 
         bgrImage.Width, // pixels width 
         bgrImage.Height, // pixels height 
         bgrImage.BytesPerLine - (bgrImage.Width * (bgrImage.BitsPerPixel / 8)), 
         0); // 0 bytes align 
 
      // stop the conversion 
      converter.Stop(); 
 
      // Initialize labImage. 
      labImage = new RasterImage(RasterMemoryFlags.Conventional, bgrImage.Width, bgrImage.Height, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, IntPtr.Zero, 0); 
 
      // convert the image buffer 
      // The srcBufferOffset parameter is an offset to the start byte of the data in the source buffer. 
      // For example, if the image data started at byte 5, then this variable should = 5. 
      // In our example here, the image data starts at byte 0. 
 
      // Note that the srcBuffer can be also passed to this function as an IntPtr pointer. 
      RasterColorConverterEngine.ConvertDirectToImage( 
         ConversionColorFormat.Lab, 
         ConversionColorFormat.Bgr, 
         labBuffer, // converted buffer 
         0, // offset from the beginning of the source buffer 
         labImage, // image to be view 
         bgrImage.Width, // pixels width 
         bgrImage.Height, // pixels height 
         0, // 0 bytes align 
         bgrImage.BytesPerLine - (bgrImage.Width * (bgrImage.BitsPerPixel / 8))); 
 
      // dispose the used image 
      bgrImage.Dispose(); 
   } 
   catch (Exception ex) 
   { 
      MessageBox.Show(ex.Message); 
   } 
 
   // Shutdown the ColorConversion. 
   RasterColorConverterEngine.Shutdown(); 
 
   // the output File Name. 
   string outputFileName = Path.Combine(LEAD_VARS.ImagesDir, "ResultImage.bmp"); 
 
   // Save the converted Image 
   codecs.Save(labImage, outputFileName, RasterImageFormat.Bmp, 24); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 22.0.2022.4.4
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.ColorConversion Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.