proportionalimage Smoothing property
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Applies to
acProportionalImage as subproperty of JPEGProperties structure.  

property Smoothing: Boolean;  

Determines whether the JPEG image displays in blocks or with blurred edges.  
Smoothing is used if ProgressiveDisplay is True, to determine whether the JPEG image is displayed in small blocks or with blurred edges. If Smoothing is True, the edges are blurred during progressive displaying of the image. If Smoothing is False, raw blocks of color are used to display the image.  

See also
CompressionQuality, Grayscale, Performance, PixelFormat, ProgressiveDisplay, ProgressiveEncoding and Scale properties.