DicomObjects (both COM and .NET versions) supports smoothing of displayed images, controlled by the MagnificationMode and MinificationMode properties of the image. Whilst using these produces a more visually pleasing image, it does not actually add to the “value” of an image, and does have a performance penalty, so developers are advised to disable these features whilst windowing and scrolling etc. by setting both to doFilterReplicate

There are two independent properties which control such smoothing in DicomObjects:

MinificationMode

Controls the smoothing where ActualZoom is <1

MagnificationMode

Controls the smoothing where ActualZoom is >1

Allowable values for MinificationMode

doFilterDefault

equal to doFilterMovingAverage

doFilterReplicate

Simply subsample (fast, but totally omits many pixels)

doFilterMovingAverage

Applies a linear kernel, depending on value of Filterlength

Allowable values for MagnificationMode

doFilterDefault

equal to doFilteReplicate ( note : different to the behaviour for MinificationMode)

doFilterReplicate

Simply replicate as needed (fast and safe, but some users dislike the "pixilation")

doFilterBSline

Applies a B-Spline kernel

doFilterCubicSline

Applies a Cubic-Spline kernel, using the CubicSplineAlpha property to define the sharpness