interleave_channelsinterleave_channelsInterleaveChannelsInterleaveChannelsinterleave_channels (Operator)

Name

interleave_channelsinterleave_channelsInterleaveChannelsInterleaveChannelsinterleave_channels — Create an interleaved image from a multichannel image.

Signature

Description

The operator interleave_channelsinterleave_channelsInterleaveChannelsInterleaveChannelsinterleave_channels creates an InterleavedImageInterleavedImageInterleavedImageinterleavedImageinterleaved_image from the input MultichannelImageMultichannelImageMultichannelImagemultichannelImagemultichannel_image containing three or four channels. This is useful to prepare a color image for visualization, e.g., by converting it to a .NET Bitmap.

Pixel format

The format of the pixels in InterleavedImageInterleavedImageInterleavedImageinterleavedImageinterleaved_image is specified with PixelFormatPixelFormatPixelFormatpixelFormatpixel_format. Possible formats are 'rgb'"rgb""rgb""rgb""rgb", 'rgba'"rgba""rgba""rgba""rgba", 'argb'"argb""argb""argb""argb", 'bgr'"bgr""bgr""bgr""bgr", 'bgra'"bgra""bgra""bgra""bgra", and 'abgr'"abgr""abgr""abgr""abgr" for byte images and 'rgb48'"rgb48""rgb48""rgb48""rgb48", 'bgr48'"bgr48""bgr48""bgr48""bgr48", 'rgba64'"rgba64""rgba64""rgba64""rgba64", 'bgra64'"bgra64""bgra64""bgra64""bgra64", 'argb64'"argb64""argb64""argb64""argb64" and 'abgr64'"abgr64""abgr64""abgr64""abgr64" for uint2 images, where 'a' denotes the 4th ('alpha') channel. Be aware that, in contrast to gen_image_interleavedgen_image_interleavedGenImageInterleavedGenImageInterleavedgen_image_interleaved, LittleEndian byte ordering is used in PixelFormatPixelFormatPixelFormatpixelFormatpixel_format.

Alpha channel

The alpha channel can be defined in the following ways:

Row alignment

The number of bytes between the beginning of two rows in the output image can be set in RowBytesRowBytesRowBytesrowBytesrow_bytes, e.g., to fulfill specific alignment criteria. Set RowBytesRowBytesRowBytesrowBytesrow_bytes to 'match'"match""match""match""match" if no additional padding is required. RowBytesRowBytesRowBytesrowBytesrow_bytes must be at least the number of bytes in PixelFormatPixelFormatPixelFormatpixelFormatpixel_format times the width of MultichannelImageMultichannelImageMultichannelImagemultichannelImagemultichannel_image.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on internal data level.

Parameters

Example (C#)

  HTuple type, width, height;
  HImage patras = new HImage("patras");

  HImage interleaved = patras.InterleaveChannels("argb", "match", 255);
  IntPtr ptr = interleaved.GetImagePointer1(out type, out width, out height);

  Image img = new Bitmap(width/4, height, width,
                         PixelFormat.Format32bppArgb, ptr);

  pictureBox.Image = img;

See also

gen_image_interleavedgen_image_interleavedGenImageInterleavedGenImageInterleavedgen_image_interleaved

Module

Foundation

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