SetYUVData(byte[],int,int,RasterYUVFormat) Method

Summary

Updates the image data using the YUV data from an input buffer. The YUV data is converted to grayscale/BGR before being set in the RasterImage.

Syntax

C++/CLI

Python

public void SetYUVData( 
   byte[] buffer, 
   int bufferIndex, 
   int bufferCount, 
   RasterYUVFormat yuvFormat 
)

public: 
void SetYUVData(  
   array<byte>^ buffer, 
   int bufferIndex, 
   int bufferCount, 
   RasterYUVFormat yuvFormat 
)

def SetYUVData(self,buffer,bufferIndex,bufferCount,yuvFormat):

Parameters

buffer
Buffer that contains the YUV data.

bufferIndex
The zero-based index into the buffer where the set operation should start.

bufferCount
Size of the data buffer pointed to by buffer. If this value is incorrect, this method will throw an exception.

yuvFormat
Specifies the YUV data format.

Remarks

This function is designed to be used mainly for use in mobile imaging to facilitate filling a BITMAPHANDLE structure using live frames from the mobile device's camera.

The function ignores the image's view perspective, so it must match the orientation of the YUV buffer. In most cases, the YUV buffer is top-to-bottom, so the ViewPerspective should be TopLeft. If the YUV buffer is flipped, the ViewPerspective should be BottomLeft, so it will be automatically flipped before saving or painting.

The YUV data should contain studio video YUV, with Y values ranging from 16 to 235 and U,V values ranging from 16 to 240. Values outside this range are clipped: values below 16 will be considered as if they were 16. Y values above 235 will be clipped to 235, U/V values above 240 will be clipped to 240.

The only supported bits per pixel are 8, 24 and 32.

Example

Gets the image data in YUV format. The format is indicated by yuvFormat. The data is returned as a byte array. The data starts at index 0 and is equal to the size of the array.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void SetYUVDataExample() 
{ 
   string fileName = Path.Combine(LEAD_VARS.ImagesDir, "nv21.bin"); 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      using (RasterImage image = new RasterImage(RasterMemoryFlags.Conventional, 1920, 1080, 24, RasterByteOrder.Bgr, RasterViewPerspective.TopLeft, null, null, 0)) 
      { 
         using (FileStream yuvFile = File.OpenRead(fileName)) 
         { 
            int size = 1920 * 1080 * 3 / 2; 
 
            Byte[] yuvBuffer = new Byte[size]; 
            yuvFile.Read(yuvBuffer, 0, size); 
 
            image.SetYUVData(yuvBuffer, 0, size, RasterYUVFormat.NV21); 
 
            codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "nv21_net.jpg"), RasterImageFormat.Jpeg, 0); 
 
            Byte[] yuvBuffer2 = new byte[size]; 
            image.GetYUVData(RasterYUVFormat.YV12, yuvBuffer2, 0, yuvBuffer2.Length); 
 
            image.SetYUVData(yuvBuffer2, 0, yuvBuffer2.Length, RasterYUVFormat.YV12); 
 
            codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "nv21_net_2.jpg"), RasterImageFormat.Jpeg, 0); 
 
            System.Diagnostics.Debug.WriteLine("Save succeeded"); 
         } 
      } 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

Overload List

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Help Version 23.0.2024.5.22

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