eff1ff4b41
* Fixed a typo in OpenJPEG.J2KLayerInfo (only affected debug display) git-svn-id: http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk@3118 52acb1d6-8a22-11de-b505-999d5b087335
67 lines
2.8 KiB
C#
67 lines
2.8 KiB
C#
/// <summary>**************************************************************************
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///
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/// $Id: LookUpTable8Interp.java,v 1.1 2002/07/25 14:56:48 grosbois Exp $
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///
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/// Copyright Eastman Kodak Company, 343 State Street, Rochester, NY 14650
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/// $Date $
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/// ***************************************************************************
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/// </summary>
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using System;
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using ICCCurveType = CSJ2K.Icc.Tags.ICCCurveType;
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namespace CSJ2K.Icc.Lut
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{
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/// <summary> An interpolated 8 bit lut
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///
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/// </summary>
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/// <version> 1.0
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/// </version>
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/// <author> Bruce A.Kern
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/// </author>
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public class LookUpTable8Interp:LookUpTable8
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{
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/// <summary> Construct the lut from the curve data</summary>
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/// <oaram> curve the data </oaram>
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/// <oaram> dwNumInput the lut size </oaram>
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/// <oaram> dwMaxOutput the lut max value </oaram>
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public LookUpTable8Interp(ICCCurveType curve, int dwNumInput, byte dwMaxOutput):base(curve, dwNumInput, dwMaxOutput)
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{
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int dwLowIndex, dwHighIndex; // Indices of interpolation points
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double dfLowIndex, dfHighIndex; // FP indices of interpolation points
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double dfTargetIndex; // Target index into interpolation table
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double dfRatio; // Ratio of LUT input points to curve values
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double dfLow, dfHigh; // Interpolation values
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double dfOut; // Output LUT value
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dfRatio = (double) (curve.count - 1) / (double) (dwNumInput - 1);
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for (int i = 0; i < dwNumInput; i++)
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{
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dfTargetIndex = (double) i * dfRatio;
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dfLowIndex = System.Math.Floor(dfTargetIndex);
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//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
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dwLowIndex = (int) dfLowIndex;
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dfHighIndex = System.Math.Ceiling(dfTargetIndex);
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//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
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dwHighIndex = (int) dfHighIndex;
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if (dwLowIndex == dwHighIndex)
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dfOut = ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));
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else
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{
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dfLow = ICCCurveType.CurveToDouble(curve.entry(dwLowIndex));
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dfHigh = ICCCurveType.CurveToDouble(curve.entry(dwHighIndex));
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dfOut = dfLow + (dfHigh - dfLow) * (dfTargetIndex - dfLowIndex);
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}
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//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
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lut[i] = (byte) System.Math.Floor(dfOut * dwMaxOutput + 0.5);
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}
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}
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/* end class LookUpTable8Interp */
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}
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} |