The png filter type.
public enum PngFilterType
||The null-filter, means no filtering for image data rows.|
||The sub filter, means substractive filtering will be applied to image data.|
||The up filter, means row-by-row substraction filter will be applied.|
||The avg filter, means, that average filter will be applied to image data.|
||The paeth predictor filter.|
||Adaptive filtering, means that saving process will choose most sutable filter for each data row. Best compression, slowest execution time.|