TIOParams.HDP_Lossless

Declaration

property HDP_Lossless: Boolean;

Description

Enabling this property will create an HDP or WebP file with mathematically lossless compression (overriding the HDP_ImageQuality property).

Default: False

Example

ImageEnView1.IO.Params.HDP_Lossless := True;
ImageEnView1.IO.SaveToFile( 'D:\image.hdp' );


// WebP Size Comparisons
ImageEnView1.IO.LoadFromFile( 'D:\Alpha.png' );   // Original PNG - 610KB

ImageEnView1.IO.Params.HDP_ImageQuality := 1.0;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image100.WebP' );  // 162KB

ImageEnView1.IO.Params.HDP_ImageQuality := 0.9;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image90.WebP' );   // 96KB

ImageEnView1.IO.Params.HDP_ImageQuality := 0.7;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image70.WebP' );   // 60KB

ImageEnView1.IO.Params.HDP_ImageQuality := 0.5;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image50.WebP' );   // 53KB

ImageEnView1.IO.Params.HDP_ImageQuality := 0.2;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image20.WebP' );   // 44KB

ImageEnView1.IO.Params.HDP_ImageQuality := 0.01;
ImageEnView1.IO.Params.HDP_Lossless     := False;
ImageEnView1.IO.SaveToFile( 'D:\image01.WebP' );   // 37KB

ImageEnView1.IO.Params.HDP_Lossless     := True;
ImageEnView1.IO.SaveToFile( 'D:\imageLossless.WebP' );  // 329KB (Lossless)

See Also

◼HDP_ImageQuality

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