Fixed implementation of methods and corrected unit tests. #619

Job	Run time
Linux (Q8/Q16/Q16-HDRI, x64)	8m 0s
Library (Core)	6m 46s
Linux musl (Q8/Q16/Q16-HDRI, x64)	6m 48s
Library (SystemDrawing)	5m 56s
Linux (Q8/Q16/Q16-HDRI, arm64)	1h 29m 15s
Library (SystemWindowsMedia)	7m 33s
MacOS (Q8/Q16/Q16-HDRI)	4m 13s
Windows (Q8, x86)	9m 38s
Windows (Q8, x64)	8m 34s
Windows (Q8, arm64)	7m 28s
Windows (Q8, Any CPU)	10m 30s
Windows (Q8-OpenMP, x64)	9m 12s
Windows (Q8-OpenMP, arm64)	6m 41s
Windows (Q16, x86)	9m 59s
Windows (Q16, x64)	9m 51s
Windows (Q16, arm64)	8m 38s
Windows (Q16, Any CPU)	10m 18s
Windows (Q16-OpenMP, x64)	9m 15s
Windows (Q16-OpenMP, arm64)	7m 53s
Windows (Q16-HDRI, x86)	9m 32s
Windows (Q16-HDRI, x64)	12m 8s
Windows (Q16-HDRI, arm64)	8m 5s
Windows (Q16-HDRI, Any CPU)	10m 5s
Windows (Q16-HDRI-OpenMP, x64)	9m 11s
Windows (Q16-HDRI-OpenMP, arm64)	6m 16s
	4h 51m 45s

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