TIEBitmap.PixelFormat

Declaration

property PixelFormat: TIEPixelFormat;

Description

Specifies the image pixel format.
You can set PixelFormat to convert an image from one format to another.

Note:
◼Ensure that AutoSetBitDepth is enabled, so setting PixelFormat will automatically update SamplesPerPixel/BitsPerSample
◼For full color images use ie24RGB (which is equivalent to 32bit if the AlphaChannel is enabled

Examples

// Set pixel format to 8bit gray-scale
IEGlobalSettings().AutoSetBitDepth := True;
ImageEnView1.IEBitmap.PixelFormat := ie8g;
ImageEnView1.Update();

// Save 32bit gray-scale TIFF (ie32f)
// Note: Compression must be: ioTIFF_UNCOMPRESSED, ioTIFF_LZW, ioTIFF_PACKBITS or ioTIFF_ZIP
ImageEnView1.LegacyBitmap := false;
ImageEnView1.IEBitmap.PixelFormat := ie32f;
ImageEnView1.IO.Params.BitsPerSample := 32;
ImageEnView1.IO.Params.SamplesPerPixel := 1;
ImageEnView1.IO.Params.TIFF_PhotometInterpret := ioTIFF_BLACKISZERO;
ImageEnView1.IO.Params.TIFF_Compression := ioTIFF_UNCOMPRESSED;
ImageEnView1.IO.SaveToFileTIFF('D:\GrayTiff32.tiff');

// Convert a 32bit PNG file to an 8bit PNG (without transparency)

ImageEnView1.IO.LoadFromFile( 'D:\Alpha.png');

// Remove alpha channel and make background white
ImageEnView1.IEBitmap.RemoveAlphaChannel( True, clWhite );

// Set PixelFormat to 8bit
ImageEnView1.IEBitmap.PixelFormat := ie8p;

// Use PixelFormat as authoritative source of bit-depth
IEGlobalSettings().AutoSetBitDepth := True;

ImageEnView1.IO.SaveToFile('D:\No-Alpha.png');

TIEBitmap.PixelFormat